chessIO 0.6.1.1 → 0.7.0.0

raw patch · 18 files changed

+13231/−521 lines, 18 filesdep +deepseqdep +hashabledep +lensdep −microlensdep −microlens-thPVP ok

version bump matches the API change (PVP)

Dependencies added: deepseq, hashable, lens, mono-traversable, template-haskell, th-lift-instances, vector-binary-instances, vector-instances

Dependencies removed: microlens, microlens-th

API changes (from Hackage documentation)

Files

• CHANGELOG.md +13/−0
• app/cboard.hs +1/−1
• app/cbookview.hs +62/−51
• book/eco.pgn +12143/−0
• book/twic-9g.bin too large to diff
• chessIO.cabal +51/−5
• src/Game/Chess.hs +17/−5
• src/Game/Chess/ECO.hs +34/−0
• src/Game/Chess/Internal.hs +174/−113
• src/Game/Chess/Internal/ECO.hs +167/−0
• src/Game/Chess/Internal/QuadBitboard.hs +62/−56
• src/Game/Chess/Internal/Square.hs +224/−33
• src/Game/Chess/PGN.hs +55/−42
• src/Game/Chess/Polyglot.hs +28/−28
• src/Game/Chess/Polyglot/Hash.hs +7/−7
• src/Game/Chess/SAN.hs +105/−105
• src/Game/Chess/Tree.hs +4/−11
• src/Game/Chess/UCI.hs +84/−64

@@ -1,5 +1,18 @@ # Releases +## chessIO 0.7.0.0++- Remove IsSquare class and add three newtye'd Ints: Square, Rank, File (inspired by [issue 5](https://github.com/mlang/chessIO/issues/5))+- Add HasCallStack to partial doPly and toSAN (thanks Oleg Grenrus)+- instance IsString Position based on fromFEN+- instance Binary Position+- instance Hashable Position+- instance Binary Ply+- instance Unbox Ply+- New functions: rank, file, rankChar, fileChar, toCoord+- New module: Game.Chess.ECO+- Chess.Game.UCI: PV is now an unboxed vector+ ## chessIO 0.6.1.1  - Fix [half-move counter not being reset on pawn push or capture](https://github.com/mlang/chessIO/issues/2) (Thanks to Oleg Grenrus)

@@ -17,7 +17,7 @@     ( fromFEN, fromUCI, isDark, legalPlies, pieceAt, startpos,       Color(Black, White),       PieceType(King, Pawn, Knight, Bishop, Rook, Queen),-      Ply, Position, Sq(H8, A1) )+      Ply, Position, Square(H8, A1) ) import Game.Chess.Polyglot     ( PolyglotBook, defaultBook, readPolyglotFile, bookPlies, bookPly ) import Game.Chess.SAN ( fromSAN, toSAN, unsafeToSAN, varToSAN )

@@ -1,53 +1,55 @@ {-# LANGUAGE TemplateHaskell #-}-import Prelude hiding (last)-import Control.Monad ( void )-import Data.Foldable ( foldl', toList )-import Data.Ix-import Data.List ( elemIndex, intersperse )-import Data.List.Extra ( chunksOf )-import Data.List.NonEmpty (NonEmpty)-import qualified Data.List.NonEmpty as NonEmpty-import Data.Maybe ( fromJust, fromMaybe )-import Data.Tree ( Tree(..), Forest )-import Data.Tree.Zipper ( TreePos, Full-                        , label, forest, fromForest, nextTree, prevTree-                        )-import qualified Data.Tree.Zipper as TreePos-import qualified Data.Vector as Vec-import Game.Chess ( Color(..), PieceType(..), Sq(..), toIndex, isDark-                  , Position, color, startpos, pieceAt, toFEN-                  , Ply, plyTarget, doPly-                  )-import Game.Chess.Polyglot ( defaultBook, bookForest, readPolyglotFile )-import Game.Chess.PGN ( readPGNFile, pgnForest )-import Game.Chess.SAN ( toSAN, varToSAN )-import Game.Chess.Tree ( plyForest, pathTree )-import Lens.Micro ( over, (&), (^.), (.~) )-import Lens.Micro.TH ( makeLenses )-import qualified Graphics.Vty as V+import           Control.Lens         (makeLenses, over, (&), (.~), (^.))+import           Control.Monad        (void)+import           Data.Foldable        (foldl', toList)+import           Data.Ix+import           Data.List            (elemIndex, intersperse)+import           Data.List.Extra      (chunksOf)+import           Data.List.NonEmpty   (NonEmpty, cons)+import qualified Data.List.NonEmpty   as NonEmpty+import           Data.Maybe           (fromJust, fromMaybe)+import           Data.Tree            (Forest, Tree (..), foldTree)+import           Data.Tree.Zipper     (Full, TreePos, forest, fromForest, label,+                                       nextTree, prevTree)+import qualified Data.Tree.Zipper     as TreePos+import qualified Data.Vector          as Vec+import           Game.Chess           (Color (..), PieceType (..), Ply,+                                       Position, Square (A1, H8), color, doPly,+                                       isDark, pieceAt, plyTarget, startpos,+                                       toFEN)+import           Game.Chess.ECO       (Opening (..), defaultECO)+import qualified Game.Chess.ECO       as ECO+import           Game.Chess.PGN       (pgnForest, readPGNFile)+import           Game.Chess.Polyglot  (bookForest, defaultBook,+                                       readPolyglotFile)+import           Game.Chess.SAN       (toSAN, varToSAN)+import           Game.Chess.Tree      (plyForest)+import qualified Graphics.Vty         as V+import           Prelude              hiding (last) -import Brick.Main ( App(..), defaultMain, continue, halt )-import qualified Brick.Focus as F-import qualified Brick.Widgets.List as L-import Brick.AttrMap (AttrName, attrMap)-import Brick.Util (on)-import Brick.Types ( EventM, Next, Widget, Location(Location), BrickEvent( VtyEvent ) )-import Brick.Widgets.Core ( showCursor, withAttr, hLimit, vLimit, hBox, vBox, str, strWrap-                          , (<+>), (<=>)-                          )-import Brick.Widgets.Center ( hCenter )-import Brick.Widgets.Border ( border )-import System.FilePath-import System.Environment ( getArgs )+import           Brick.AttrMap        (AttrName, attrMap)+import qualified Brick.Focus          as F+import           Brick.Main           (App (..), continue, defaultMain, halt)+import           Brick.Types          (BrickEvent (VtyEvent), EventM,+                                       Location (Location), Next, Widget)+import           Brick.Util           (on)+import           Brick.Widgets.Border (border, borderWithLabel)+import           Brick.Widgets.Center (hCenter)+import           Brick.Widgets.Core   (hBox, hLimit, showCursor, str, strWrap,+                                       txt, txtWrap, vBox, vLimit, withAttr,+                                       (<+>), (<=>))+import qualified Brick.Widgets.List   as L+import           System.Environment   (getArgs)+import           System.FilePath  data Name = List | Board | BoardStyle deriving (Show, Ord, Eq) -type Style a = Position -> Sq -> Widget a+type Style a = Position -> Square -> Widget a  data St = St { _initialPosition :: Position-             , _treePos :: TreePos Full (NonEmpty Ply)-             , _boardStyle :: L.List Name (String, Style Name)-             , _focusRing :: F.FocusRing Name+             , _treePos         :: TreePos Full (NonEmpty Ply)+             , _boardStyle      :: L.List Name (String, Style Name)+             , _focusRing       :: F.FocusRing Name              }  makeLenses ''St@@ -56,7 +58,7 @@ position st = foldl' doPly (st^.initialPosition) (st^.treePos & label) previousPosition st = foldl' doPly (st^.initialPosition) (st^.treePos & label & NonEmpty.init) -targetSquare :: St -> Int+targetSquare :: St -> Square targetSquare = plyTarget . NonEmpty.last . label . (^. treePos)  elemList :: Eq a => n -> a -> [a] -> L.List n a@@ -71,7 +73,7 @@ selectedAttr :: AttrName selectedAttr = "selected" -renderPosition :: Position -> Color -> Maybe Int -> Style Name -> Widget Name+renderPosition :: Position -> Color -> Maybe Square -> Style Name -> Widget Name renderPosition pos persp tgt sty = ranks <+> border board <=> files where   rev :: [a] -> [a]   rev = if persp == Black then reverse else id@@ -79,8 +81,8 @@   files = str $ rev "   a b c d e f g h   "   board = hLimit 17 . vLimit 8 . vBox $ map (hBox . spacer . map pc) squares   squares = reverse $ chunksOf 8 $ rev [A1 .. H8]-  c sq | Just t <- tgt, t == toIndex sq = showCursor Board $ Location (0,0)-       | otherwise                      = id+  c sq | Just t <- tgt, t == sq = showCursor Board $ Location (0,0)+       | otherwise              = id   pc sq = c sq $ sty pos sq   spacer = (str " " :) . (<> [str " "]) . intersperse (str " ") @@ -113,8 +115,8 @@ putCursorIf False _ _  = id  withAttrIf :: Bool -> AttrName -> Widget n -> Widget n-withAttrIf True attr   = withAttr attr-withAttrIf False _     = id+withAttrIf True attr = withAttr attr+withAttrIf False _   = id  type Command = St -> EventM Name (Next St) @@ -171,9 +173,10 @@   appStartEvent = pure   appDraw st = [ui] where     ui = hBox [ hLimit 9 list-              , hLimit 23 $ hCenter board+              , hLimit 23 $ hCenter board <=> str " " <=> eco               , hCenter . hLimit 40 $ str " " <=> var               ]+      <=> str " "       <=> (str "FEN: " <+> fen)       <=> str " "       <=> hBox [str "Board style (+/- to change): ", style]@@ -181,6 +184,11 @@                , hCenter $ str " "                , str "ESC (q) = Quit"                ]+    eco = maybe (str " ") drawECO (ECO.lookup (position st) defaultECO)+    drawECO co = borderWithLabel (str "ECO " <+> txt (coCode co)) $+      case coVariation co of+        Nothing        -> txtWrap (coName co)+        Just variation -> txtWrap (coName co) <=> txtWrap variation     style = vLimit 1 $ L.renderList drawStyle True (st^.boardStyle)     drawStyle foc (n, _) = putCursorIf foc BoardStyle (0,0) $ str n     selectedStyle = maybe english (snd . snd) $@@ -188,7 +196,7 @@     list = L.renderList (drawPly (previousPosition st)) True (plyList st)     drawPly p foc = putCursorIf foc List (0,0)                   . withAttrIf foc selectedAttr-                  . str . toSAN p +                  . str . toSAN p     board = renderPosition (position st) (color (previousPosition st)) (Just . targetSquare $ st) selectedStyle     var = strWrap . varToSAN (st^.initialPosition) $ st^.treePos & label & toList     fen = str . toFEN $ position st@@ -212,6 +220,9 @@   pos = startpos   fr = F.focusRing [List, Board, BoardStyle]   sl = L.list BoardStyle (Vec.fromList styles) 1++pathTree :: Tree a -> Tree (NonEmpty a)+pathTree = foldTree $ \a -> Node (pure a) . (fmap . fmap) (cons a)  main :: IO () main = do

@@ -0,0 +1,12143 @@+{+A PGN file of ECO classifications distributed with the PGN extraction+program, pgn-extract. I believe that the original file from which I+generated this was put together by Ewart Shaw, Franz Hemmer and others,+to whom appropriate thanks and acknowledgement is due.  Permission has+been granted for its inclusion with the pgn-extract program, which is+available from:+https://www.cs.kent.ac.uk/~djb/pgn-extract/++David J. Barnes (d.j.barnes@kent.ac.uk)+}++[ECO "A00"]+[Opening "Polish (Sokolsky) opening"]++1. b4 *++[ECO "A00"]+[Opening "Polish"]+[Variation "Tuebingen variation"]++1. b4 Nh6 *++[ECO "A00"]+[Opening "Polish"]+[Variation "Outflank variation"]++1. b4 c6 *++[ECO "A00"]+[Opening "Benko's opening"]++1. g3 *++[ECO "A00"]+[Opening "Lasker simul special"]++1. g3 h5 *++[ECO "A00"]+[Opening "Benko's opening"]+[Variation "reversed Alekhine"]++1. g3 e5 2. Nf3 *++[ECO "A00"]+[Opening "Grob's attack"]++1. g4 *++[ECO "A00"]+[Opening "Grob"]+[Variation "spike attack"]++1. g4 d5 2. Bg2 c6 3. g5 *++[ECO "A00"]+[Opening "Grob"]+[Variation "Fritz gambit"]++1. g4 d5 2. Bg2 Bxg4 3. c4 *++[ECO "A00"]+[Opening "Grob"]+[Variation "Romford counter-gambit"]++1. g4 d5 2. Bg2 Bxg4 3. c4 d4 *++[ECO "A00"]+[Opening "Clemenz (Mead's, Basman's or de Klerk's) opening"]++1. h3 *++[ECO "A00"]+[Opening "Global opening"]++1. h3 e5 2. a3 *++[ECO "A00"]+[Opening "Amar (Paris) opening"]++1. Nh3 *++[ECO "A00"]+[Opening "Amar gambit"]++1. Nh3 d5 2. g3 e5 3. f4 Bxh3 4. Bxh3 exf4 *++[ECO "A00"]+[Opening "Dunst (Sleipner, Heinrichsen) opening"]++1. Nc3 *++[ECO "A00"]+[Opening "Dunst (Sleipner, Heinrichsen) opening"]++1. Nc3 e5 *++[ECO "A00"]+[Opening "Battambang opening"]++1. Nc3 e5 2. a3 *++[ECO "A00"]+[Opening "Novosibirsk opening"]++1. Nc3 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qh4 *++[ECO "A00"]+[Opening "Anderssen's opening"]++1. a3 *++[ECO "A00"]+[Opening "Ware (Meadow Hay) opening"]++1. a4 *++[ECO "A00"]+[Opening "Crab opening"]++1. a4 e5 2. h4 *++[ECO "A00"]+[Opening "Saragossa opening"]++1. c3 *++[ECO "A00"]+[Opening "Mieses opening"]++1. d3 *++[ECO "A00"]+[Opening "Mieses opening"]++1. d3 e5 *++[ECO "A00"]+[Opening "Valencia opening"]++1. d3 e5 2. Nd2 *++[ECO "A00"]+[Opening "Venezolana opening"]++1. d3 c5 2. Nc3 Nc6 3. g3 *++[ECO "A00"]+[Opening "Van't Kruijs opening"]++1. e3 *++[ECO "A00"]+[Opening "Amsterdam attack"]++1. e3 e5 2. c4 d6 3. Nc3 Nc6 4. b3 Nf6 *++[ECO "A00"]+[Opening "Gedult's opening"]++1. f3 *++[ECO "A00"]+[Opening "Hammerschlag (Fried fox/Pork chop opening)"]++1. f3 e5 2. Kf2 *++[ECO "A00"]+[Opening "Anti-Borg (Desprez) opening"]++1. h4 *++[ECO "A00"]+[Opening "Durkin's attack"]++1. Na3 *++[ECO "A01"]+[Opening "Nimzovich-Larsen attack"]++1. b3 *++[ECO "A01"]+[Opening "Nimzovich-Larsen attack"]+[Variation "modern variation"]++1. b3 e5 *++[ECO "A01"]+[Opening "Nimzovich-Larsen attack"]+[Variation "Indian variation"]++1. b3 Nf6 *++[ECO "A01"]+[Opening "Nimzovich-Larsen attack"]+[Variation "classical variation"]++1. b3 d5 *++[ECO "A01"]+[Opening "Nimzovich-Larsen attack"]+[Variation "English variation"]++1. b3 c5 *++[ECO "A01"]+[Opening "Nimzovich-Larsen attack"]+[Variation "Dutch variation"]++1. b3 f5 *++[ECO "A01"]+[Opening "Nimzovich-Larsen attack"]+[Variation "Polish variation"]++1. b3 b5 *++[ECO "A01"]+[Opening "Nimzovich-Larsen attack"]+[Variation "symmetrical variation"]++1. b3 b6 *++[ECO "A02"]+[Opening "Bird's opening"]++1. f4 *++[ECO "A02"]+[Opening "Bird"]+[Variation "From gambit"]++1. f4 e5 *++[ECO "A02"]+[Opening "Bird"]+[Variation "From gambit, Lasker variation"]++1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 g5 *++[ECO "A02"]+[Opening "Bird"]+[Variation "From gambit, Lipke variation"]++1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 Nh6 5. d4 *++[ECO "A02"]+[Opening "Bird's opening, Swiss gambit"]++1. f4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4 *++[ECO "A02"]+[Opening "Bird"]+[Variation "Hobbs gambit"]++1. f4 g5 *++[ECO "A03"]+[Opening "Bird's opening"]++1. f4 d5 *++[ECO "A03"]+[Opening "Mujannah opening"]++1. f4 d5 2. c4 *++[ECO "A03"]+[Opening "Bird's opening"]+[Variation "Williams gambit"]++1. f4 d5 2. e4 *++[ECO "A03"]+[Opening "Bird's opening"]+[Variation "Lasker variation"]++1. f4 d5 2. Nf3 Nf6 3. e3 c5 *++[ECO "A04"]+[Opening "Reti opening"]++1. Nf3 *++[ECO "A04"]+[Opening "Reti v Dutch"]++1. Nf3 f5 *++[ECO "A04"]+[Opening "Reti"]+[Variation "Pirc-Lisitsin gambit"]++1. Nf3 f5 2. e4 *++[ECO "A04"]+[Opening "Reti"]+[Variation "Lisitsin gambit deferred"]++1. Nf3 f5 2. d3 Nf6 3. e4 *++[ECO "A04"]+[Opening "Reti opening"]++1. Nf3 d6 *++[ECO "A04"]+[Opening "Reti"]+[Variation "Wade defence"]++1. Nf3 d6 2. e4 Bg4 *++[ECO "A04"]+[Opening "Reti"]+[Variation "Herrstroem gambit"]++1. Nf3 g5 *++[ECO "A05"]+[Opening "Reti opening"]++1. Nf3 Nf6 *++[ECO "A05"]+[Opening "Reti"]+[Variation "King's Indian attack, Spassky's variation"]++1. Nf3 Nf6 2. g3 b5 *++[ECO "A05"]+[Opening "Reti"]+[Variation "King's Indian attack"]++1. Nf3 Nf6 2. g3 g6 *++[ECO "A05"]+[Opening "Reti"]+[Variation "King's Indian attack, Reti-Smyslov variation"]++1. Nf3 Nf6 2. g3 g6 3. b4 *++[ECO "A06"]+[Opening "Reti opening"]++1. Nf3 d5 *++[ECO "A06"]+[Opening "Reti"]+[Variation "old Indian attack"]++1. Nf3 d5 2. d3 *++[ECO "A06"]+[Opening "Santasiere's folly"]++1. Nf3 d5 2. b4 *++[ECO "A06"]+[Opening "Tennison (Lemberg, Zukertort) gambit"]++1. Nf3 d5 2. e4 *++[ECO "A06"]+[Opening "Reti"]+[Variation "Nimzovich-Larsen attack"]++1. Nf3 d5 2. b3 *++[ECO "A07"]+[Opening "Reti"]+[Variation "King's Indian attack (Barcza system)"]++1. Nf3 d5 2. g3 *++[ECO "A07"]+[Opening "Reti"]+[Variation "King's Indian attack, Yugoslav variation"]++1. Nf3 d5 2. g3 Nf6 3. Bg2 c6 4. O-O Bg4 *++[ECO "A07"]+[Opening "Reti"]+[Variation "King's Indian attack, Keres variation"]++1. Nf3 d5 2. g3 Bg4 3. Bg2 Nd7 *++[ECO "A07"]+[Opening "Reti"]+[Variation "King's Indian attack"]++1. Nf3 d5 2. g3 g6 *++[ECO "A07"]+[Opening "Reti"]+[Variation "King's Indian attack, Pachman system"]++1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. O-O e5 5. d3 Ne7 *++[ECO "A07"]+[Opening "Reti"]+[Variation "King's Indian attack (with ...c5)"]++1. Nf3 d5 2. g3 c5 *++[ECO "A08"]+[Opening "Reti"]+[Variation "King's Indian attack"]++1. Nf3 d5 2. g3 c5 3. Bg2 *++[ECO "A08"]+[Opening "Reti"]+[Variation "King's Indian attack, French variation"]++1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. O-O e6 5. d3 Nf6 6. Nbd2 Be7 7. e4 O-O 8.+Re1 *++[ECO "A09"]+[Opening "Reti opening"]++1. Nf3 d5 2. c4 *++[ECO "A09"]+[Opening "Reti"]+[Variation "advance variation"]++1. Nf3 d5 2. c4 d4 *++[ECO "A09"]+[Opening "Reti accepted"]++1. Nf3 d5 2. c4 dxc4 *++[ECO "A09"]+[Opening "Reti accepted"]+[Variation "Keres variation"]++1. Nf3 d5 2. c4 dxc4 3. e3 Be6 *++[ECO "A10"]+[Opening "English opening"]++1. c4 *++[ECO "A10"]+[Opening "English opening"]++1. c4 g6 *++[ECO "A10"]+[Opening "English"]+[Variation "Adorjan defence"]++1. c4 g6 2. e4 e5 *++[ECO "A10"]+[Opening "English"]+[Variation "Jaenisch gambit"]++1. c4 b5 *++[ECO "A10"]+[Opening "English"]+[Variation "Anglo-Dutch defense"]++1. c4 f5 *++[ECO "A11"]+[Opening "English"]+[Variation "Caro-Kann defensive system"]++1. c4 c6 *++[ECO "A12"]+[Opening "English"]+[Variation "Caro-Kann defensive system"]++1. c4 c6 2. Nf3 d5 3. b3 *++[ECO "A12"]+[Opening "English"]+[Variation "Torre defensive system"]++1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. g3 Bg4 *++[ECO "A12"]+[Opening "English"]+[Variation "London defensive system"]++1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. g3 Bf5 *++[ECO "A12"]+[Opening "English"]+[Variation "Caro-Kann defensive system"]++1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. Bb2 *++[ECO "A12"]+[Opening "English"]+[Variation "Bled variation"]++1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. Bb2 g6 *++[ECO "A12"]+[Opening "English"]+[Variation "New York (London) defensive system"]++1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. Bb2 Bf5 *++[ECO "A12"]+[Opening "English"]+[Variation "Capablanca's variation"]++1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. Bb2 Bg4 *++[ECO "A12"]+[Opening "English"]+[Variation "Caro-Kann defensive system, Bogolyubov variation"]++1. c4 c6 2. Nf3 d5 3. b3 Bg4 *++[ECO "A13"]+[Opening "English opening"]++1. c4 e6 *++[ECO "A13"]+[Opening "English"]+[Variation "Romanishin gambit"]++1. c4 e6 2. Nf3 Nf6 3. g3 a6 4. Bg2 b5 *++[ECO "A13"]+[Opening "English opening"]+[Variation "Agincourt variation"]++1. c4 e6 2. Nf3 d5 *++[ECO "A13"]+[Opening "English"]+[Variation "Wimpey system"]++1. c4 e6 2. Nf3 d5 3. b3 Nf6 4. Bb2 c5 5. e3 *++[ECO "A13"]+[Opening "English opening"]+[Variation "Agincourt variation"]++1. c4 e6 2. Nf3 d5 3. g3 *++[ECO "A13"]+[Opening "English"]+[Variation "Kurajica defence"]++1. c4 e6 2. Nf3 d5 3. g3 c6 *++[ECO "A13"]+[Opening "English"]+[Variation "Neo-Catalan"]++1. c4 e6 2. Nf3 d5 3. g3 Nf6 *++[ECO "A13"]+[Opening "English"]+[Variation "Neo-Catalan accepted"]++1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 dxc4 *++[ECO "A14"]+[Opening "English"]+[Variation "Neo-Catalan declined"]++1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O *++[ECO "A14"]+[Opening "English"]+[Variation "Symmetrical, Keres defence"]++1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O c5 6. cxd5 Nxd5 7. Nc3 Nc6 *++[ECO "A15"]+[Opening "English, 1...Nf6 (Anglo-Indian defense)"]++1. c4 Nf6 *++[ECO "A15"]+[Opening "English orang-utan"]++1. c4 Nf6 2. b4 *++[ECO "A15"]+[Opening "English opening"]++1. c4 Nf6 2. Nf3 *++[ECO "A16"]+[Opening "English opening"]++1. c4 Nf6 2. Nc3 *++[ECO "A16"]+[Opening "English"]+[Variation "Anglo-Gruenfeld defense"]++1. c4 Nf6 2. Nc3 d5 *++[ECO "A16"]+[Opening "English"]+[Variation "Anglo-Gruenfeld, Smyslov defense"]++1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nxc3 *++[ECO "A16"]+[Opening "English"]+[Variation "Anglo-Gruenfeld, Czech defense"]++1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nb6 *++[ECO "A16"]+[Opening "English"]+[Variation "Anglo-Gruenfeld defense"]++1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 *++[ECO "A16"]+[Opening "English"]+[Variation "Anglo-Gruenfeld defense, Korchnoi variation"]++1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 g6 5. g3 Bg7 6. Bg2 e5 *++[ECO "A17"]+[Opening "English opening"]++1. c4 Nf6 2. Nc3 e6 *++[ECO "A17"]+[Opening "English"]+[Variation "Queens Indian formation"]++1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 *++[ECO "A17"]+[Opening "English"]+[Variation "Queens Indian, Romanishin variation"]++1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. e4 Bb7 5. Bd3 *++[ECO "A17"]+[Opening "English"]+[Variation "Nimzo-English opening"]++1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4 *++[ECO "A18"]+[Opening "English"]+[Variation "Mikenas-Carls variation"]++1. c4 Nf6 2. Nc3 e6 3. e4 *++[ECO "A18"]+[Opening "English"]+[Variation "Mikenas-Carls, Flohr variation"]++1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 *++[ECO "A18"]+[Opening "English"]+[Variation "Mikenas-Carls, Kevitz variation"]++1. c4 Nf6 2. Nc3 e6 3. e4 Nc6 *++[ECO "A19"]+[Opening "English"]+[Variation "Mikenas-Carls, Sicilian variation"]++1. c4 Nf6 2. Nc3 e6 3. e4 c5 *++[ECO "A20"]+[Opening "English opening"]++1. c4 e5 *++[ECO "A20"]+[Opening "English, Nimzovich variation"]++1. c4 e5 2. Nf3 *++[ECO "A20"]+[Opening "English, Nimzovich, Flohr variation"]++1. c4 e5 2. Nf3 e4 *++[ECO "A21"]+[Opening "English opening"]++1. c4 e5 2. Nc3 *++[ECO "A21"]+[Opening "English, Troeger defence"]++1. c4 e5 2. Nc3 d6 3. g3 Be6 4. Bg2 Nc6 *++[ECO "A21"]+[Opening "English, Keres variation"]++1. c4 e5 2. Nc3 d6 3. g3 c6 *++[ECO "A21"]+[Opening "English opening"]++1. c4 e5 2. Nc3 d6 3. Nf3 *++[ECO "A21"]+[Opening "English, Smyslov defence"]++1. c4 e5 2. Nc3 d6 3. Nf3 Bg4 *++[ECO "A21"]+[Opening "English, Kramnik-Shirov counterattack"]++1. c4 e5 2. Nc3 Bb4 *++[ECO "A22"]+[Opening "English opening"]++1. c4 e5 2. Nc3 Nf6 *++[ECO "A22"]+[Opening "English"]+[Variation "Bellon gambit"]++1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 b5 *++[ECO "A22"]+[Opening "English"]+[Variation "Carls' Bremen system"]++1. c4 e5 2. Nc3 Nf6 3. g3 *++[ECO "A22"]+[Opening "English"]+[Variation "Bremen, reverse dragon"]++1. c4 e5 2. Nc3 Nf6 3. g3 d5 *++[ECO "A22"]+[Opening "English"]+[Variation "Bremen, Smyslov system"]++1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 *++[ECO "A23"]+[Opening "English"]+[Variation "Bremen system, Keres variation"]++1. c4 e5 2. Nc3 Nf6 3. g3 c6 *++[ECO "A24"]+[Opening "English"]+[Variation "Bremen system with ...g6"]++1. c4 e5 2. Nc3 Nf6 3. g3 g6 *++[ECO "A25"]+[Opening "English"]+[Variation "Sicilian reversed"]++1. c4 e5 2. Nc3 Nc6 *++[ECO "A25"]+[Opening "English"]+[Variation "closed system"]++1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 *++[ECO "A25"]+[Opening "English"]+[Variation "closed, Taimanov variation"]++1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Nh6 *++[ECO "A25"]+[Opening "English"]+[Variation "closed, Hort variation"]++1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Be6 *++[ECO "A25"]+[Opening "English"]+[Variation "closed, 5.Rb1"]++1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Rb1 *++[ECO "A25"]+[Opening "English"]+[Variation "closed, 5.Rb1 Taimanov variation"]++1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Rb1 Nh6 *++[ECO "A25"]+[Opening "English"]+[Variation "closed system (without ...d6)"]++1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 *++[ECO "A26"]+[Opening "English"]+[Variation "closed system"]++1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 *++[ECO "A26"]+[Opening "English"]+[Variation "Botvinnik system"]++1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. e4 *++[ECO "A27"]+[Opening "English"]+[Variation "three knights system"]++1. c4 e5 2. Nc3 Nc6 3. Nf3 *++[ECO "A28"]+[Opening "English"]+[Variation "four knights system"]++1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 *++[ECO "A28"]+[Opening "English"]+[Variation "Nenarokov variation"]++1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Bg5 h6 7. Bh4 +Bxc3+ 8. bxc3 Ne5 *++[ECO "A28"]+[Opening "English"]+[Variation "Bradley Beach variation"]++1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 e4 *++[ECO "A28"]+[Opening "English"]+[Variation "four knights, Nimzovich variation"]++1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. e4 *++[ECO "A28"]+[Opening "English"]+[Variation "four knights, Marini variation"]++1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. a3 *++[ECO "A28"]+[Opening "English"]+[Variation "four knights, Capablanca variation"]++1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d3 *++[ECO "A28"]+[Opening "English"]+[Variation "four knights, 4.e3"]++1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. e3 *++[ECO "A28"]+[Opening "English"]+[Variation "four knights, Stean variation"]++1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. e3 Bb4 5. Qc2 O-O 6. Nd5 Re8 7. Qf5 *++[ECO "A28"]+[Opening "English"]+[Variation "four knights, Romanishin variation"]++1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. e3 Bb4 5. Qc2 Bxc3 *++[ECO "A29"]+[Opening "English"]+[Variation "four knights, kingside fianchetto"]++1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3 *++[ECO "A30"]+[Opening "English"]+[Variation "symmetrical variation"]++1. c4 c5 *++[ECO "A30"]+[Opening "English"]+[Variation "symmetrical, hedgehog system"]++1. c4 c5 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 *++[ECO "A30"]+[Opening "English"]+[Variation "symmetrical, hedgehog, flexible formation"]++1. c4 c5 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O e6 6. Nc3 Be7 7. d4 cxd4 8.+Qxd4 d6 9. Rd1 a6 10. b3 Nbd7 *++[ECO "A31"]+[Opening "English"]+[Variation "symmetrical, Benoni formation"]++1. c4 c5 2. Nf3 Nf6 3. d4 *++[ECO "A32"]+[Opening "English"]+[Variation "symmetrical variation"]++1. c4 c5 2. Nf3 Nf6 3. d4 cxd4 4. Nxd4 e6 *++[ECO "A33"]+[Opening "English"]+[Variation "symmetrical variation"]++1. c4 c5 2. Nf3 Nf6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Nc6 *++[ECO "A33"]+[Opening "English"]+[Variation "symmetrical, Geller variation"]++1. c4 c5 2. Nf3 Nf6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Nc6 6. g3 Qb6 *++[ECO "A34"]+[Opening "English"]+[Variation "symmetrical variation"]++1. c4 c5 2. Nc3 *++[ECO "A34"]+[Opening "English"]+[Variation "symmetrical, three knights system"]++1. c4 c5 2. Nc3 Nf6 3. Nf3 d5 4. cxd5 Nxd5 *++[ECO "A34"]+[Opening "English"]+[Variation "symmetrical variation"]++1. c4 c5 2. Nc3 Nf6 3. g3 *++[ECO "A34"]+[Opening "English"]+[Variation "symmetrical, Rubinstein system"]++1. c4 c5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc7 *++[ECO "A35"]+[Opening "English"]+[Variation "symmetrical variation"]++1. c4 c5 2. Nc3 Nc6 *++[ECO "A35"]+[Opening "English"]+[Variation "symmetrical, four knights system"]++1. c4 c5 2. Nc3 Nc6 3. Nf3 Nf6 *++[ECO "A36"]+[Opening "English"]+[Variation "symmetrical variation"]++1. c4 c5 2. Nc3 Nc6 3. g3 *++[ECO "A36"]+[Opening "English"]+[Variation "ultra-symmetrical variation"]++1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 *++[ECO "A36"]+[Opening "English"]+[Variation "symmetrical, Botvinnik system reversed"]++1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 e5 *++[ECO "A36"]+[Opening "English"]+[Variation "symmetrical, Botvinnik system"]++1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e4 *++[ECO "A37"]+[Opening "English"]+[Variation "symmetrical variation"]++1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 *++[ECO "A37"]+[Opening "English"]+[Variation "symmetrical, Botvinnik system reversed"]++1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5 *++[ECO "A38"]+[Opening "English"]+[Variation "symmetrical variation"]++1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 *++[ECO "A38"]+[Opening "English"]+[Variation "symmetrical, main line with d3"]++1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. d3 *++[ECO "A38"]+[Opening "English"]+[Variation "symmetrical, main line with b3"]++1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. b3 *++[ECO "A39"]+[Opening "English"]+[Variation "symmetrical, main line with d4"]++1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. d4 *++[ECO "A40"]+[Opening "Queen's pawn"]++1. d4 *++[ECO "A40"]+[Opening "Queen's pawn"]+[Variation "Lundin (Kevitz-Mikenas) defence"]++1. d4 Nc6 *++[ECO "A40"]+[Opening "Queen's pawn"]+[Variation "Charlick (Englund) gambit"]++1. d4 e5 *++[ECO "A40"]+[Opening "Queen's pawn"]+[Variation "Englund gambit"]++1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7 4. Qd5 f6 5. exf6 Nxf6 *++[ECO "A40"]+[Opening "Queen's pawn"]+[Variation "English defence"]++1. d4 b6 *++[ECO "A40"]+[Opening "Polish defence"]++1. d4 b5 *++[ECO "A40"]+[Opening "Queen's pawn"]++1. d4 e6 *++[ECO "A40"]+[Opening "Queen's pawn"]+[Variation "Keres defence"]++1. d4 e6 2. c4 b6 *++[ECO "A40"]+[Opening "Queen's pawn"]+[Variation "Franco-Indian (Keres) defence"]++1. d4 e6 2. c4 Bb4+ *++[ECO "A40"]+[Opening "Modern defence"]++1. d4 g6 *++[ECO "A40"]+[Opening "Beefeater defence"]++1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 f5 *++[ECO "A41"]+[Opening "Queen's Pawn"]++1. d4 d6 *++[ECO "A41"]+[Opening "Old Indian"]+[Variation "Tartakower (Wade) variation"]++1. d4 d6 2. Nf3 Bg4 *++[ECO "A41"]+[Opening "Old Indian defence"]++1. d4 d6 2. c4 *++[ECO "A41"]+[Opening "Modern defence"]++1. d4 d6 2. c4 g6 3. Nc3 Bg7 *++[ECO "A41"]+[Opening "Robatsch defence"]+[Variation "Rossolimo variation"]++1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c4 Bg4 *++[ECO "A42"]+[Opening "Modern defence"]+[Variation "Averbakh system"]++1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 *++[ECO "A42"]+[Opening "Pterodactyl defence"]++1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 c5 5. Nf3 Qa5 *++[ECO "A42"]+[Opening "Modern defence"]+[Variation "Averbakh system, Randspringer variation"]++1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 f5 *++[ECO "A42"]+[Opening "Modern defence"]+[Variation "Averbakh system, Kotov variation"]++1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 Nc6 *++[ECO "A43"]+[Opening "Old Benoni defence"]++1. d4 c5 *++[ECO "A43"]+[Opening "Old Benoni"]+[Variation "Franco-Benoni defence"]++1. d4 c5 2. d5 e6 3. e4 *++[ECO "A43"]+[Opening "Old Benoni"]+[Variation "Mujannah formation"]++1. d4 c5 2. d5 f5 *++[ECO "A43"]+[Opening "Old Benoni defence"]++1. d4 c5 2. d5 Nf6 *++[ECO "A43"]+[Opening "Woozle defence"]++1. d4 c5 2. d5 Nf6 3. Nc3 Qa5 *++[ECO "A43"]+[Opening "Old Benoni defence"]++1. d4 c5 2. d5 Nf6 3. Nf3 *++[ECO "A43"]+[Opening "Hawk (Habichd) defence"]++1. d4 c5 2. d5 Nf6 3. Nf3 c4 *++[ECO "A43"]+[Opening "Old Benoni defence"]++1. d4 c5 2. d5 d6 *++[ECO "A43"]+[Opening "Old Benoni"]+[Variation "Schmid's system"]++1. d4 c5 2. d5 d6 3. Nc3 g6 *++[ECO "A44"]+[Opening "Old Benoni defence"]++1. d4 c5 2. d5 e5 *++[ECO "A44"]+[Opening "Semi-Benoni (`blockade variation')"]++1. d4 c5 2. d5 e5 3. e4 d6 *++[ECO "A45"]+[Opening "Queen's pawn game"]++1. d4 Nf6 *++[ECO "A45"]+[Opening "Queen's pawn"]+[Variation "Bronstein gambit"]++1. d4 Nf6 2. g4 *++[ECO "A45"]+[Opening "Canard opening"]++1. d4 Nf6 2. f4 *++[ECO "A45"]+[Opening "Paleface attack"]++1. d4 Nf6 2. f3 *++[ECO "A45"]+[Opening "Blackmar-Diemer gambit"]++1. d4 Nf6 2. f3 d5 3. e4 *++[ECO "A45"]+[Opening "Gedult attack"]++1. d4 Nf6 2. f3 d5 3. g4 *++[ECO "A45"]+[Opening "Trompovsky attack (Ruth, Opovcensky opening)"]++1. d4 Nf6 2. Bg5 *++[ECO "A46"]+[Opening "Queen's pawn game"]++1. d4 Nf6 2. Nf3 *++[ECO "A46"]+[Opening "Queen's pawn"]+[Variation "Torre attack"]++1. d4 Nf6 2. Nf3 e6 3. Bg5 *++[ECO "A46"]+[Opening "Queen's pawn"]+[Variation "Torre attack, Wagner gambit"]++1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e4 *++[ECO "A46"]+[Opening "Queen's pawn"]+[Variation "Yusupov-Rubinstein system"]++1. d4 Nf6 2. Nf3 e6 3. e3 *++[ECO "A46"]+[Opening "Doery defence"]++1. d4 Nf6 2. Nf3 Ne4 *++[ECO "A47"]+[Opening "Queen's Indian defence"]++1. d4 Nf6 2. Nf3 b6 *++[ECO "A47"]+[Opening "Queen's Indian"]+[Variation "Marienbad system"]++1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 *++[ECO "A47"]+[Opening "Queen's Indian"]+[Variation "Marienbad system, Berg variation"]++1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 5. c4 cxd4 6. Qxd4 *++[ECO "A48"]+[Opening "King's Indian"]+[Variation "East Indian defence"]++1. d4 Nf6 2. Nf3 g6 *++[ECO "A48"]+[Opening "King's Indian"]+[Variation "Torre attack"]++1. d4 Nf6 2. Nf3 g6 3. Bg5 *++[ECO "A48"]+[Opening "King's Indian"]+[Variation "London system"]++1. d4 Nf6 2. Nf3 g6 3. Bf4 *++[ECO "A49"]+[Opening "King's Indian"]+[Variation "fianchetto without c4"]++1. d4 Nf6 2. Nf3 g6 3. g3 *++[ECO "A50"]+[Opening "Queen's pawn game"]++1. d4 Nf6 2. c4 *++[ECO "A50"]+[Opening "Kevitz-Trajkovich defence"]++1. d4 Nf6 2. c4 Nc6 *++[ECO "A50"]+[Opening "Queen's Indian accelerated"]++1. d4 Nf6 2. c4 b6 *++[ECO "A51"]+[Opening "Budapest defence declined"]++1. d4 Nf6 2. c4 e5 *++[ECO "A51"]+[Opening "Budapest"]+[Variation "Fajarowicz variation"]++1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 *++[ECO "A51"]+[Opening "Budapest"]+[Variation "Fajarowicz, Steiner variation"]++1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. Qc2 *++[ECO "A52"]+[Opening "Budapest defence"]++1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 *++[ECO "A52"]+[Opening "Budapest"]+[Variation "Adler variation"]++1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3 *++[ECO "A52"]+[Opening "Budapest"]+[Variation "Rubinstein variation"]++1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Bf4 *++[ECO "A52"]+[Opening "Budapest"]+[Variation "Alekhine variation"]++1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 *++[ECO "A52"]+[Opening "Budapest"]+[Variation "Alekhine, Abonyi variation"]++1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 Nxe5 5. f4 Nec6 *++[ECO "A52"]+[Opening "Budapest"]+[Variation "Alekhine variation, Balogh gambit"]++1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 d6 *++[ECO "A53"]+[Opening "Old Indian defence"]++1. d4 Nf6 2. c4 d6 *++[ECO "A53"]+[Opening "Old Indian"]+[Variation "Janowski variation"]++1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 *++[ECO "A54"]+[Opening "Old Indian"]+[Variation "Ukrainian variation"]++1. d4 Nf6 2. c4 d6 3. Nc3 e5 *++[ECO "A54"]+[Opening "Old Indian"]+[Variation "Dus-Khotimirsky variation"]++1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. e3 Nbd7 5. Bd3 *++[ECO "A54"]+[Opening "Old Indian"]+[Variation "Ukrainian variation, 4.Nf3"]++1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 *++[ECO "A55"]+[Opening "Old Indian"]+[Variation "main line"]++1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 Nbd7 5. e4 *++[ECO "A56"]+[Opening "Benoni defence"]++1. d4 Nf6 2. c4 c5 *++[ECO "A56"]+[Opening "Benoni defence, Hromodka system"]++1. d4 Nf6 2. c4 c5 3. d5 d6 *++[ECO "A56"]+[Opening "Vulture defence"]++1. d4 Nf6 2. c4 c5 3. d5 Ne4 *++[ECO "A56"]+[Opening "Czech Benoni defence"]++1. d4 Nf6 2. c4 c5 3. d5 e5 *++[ECO "A56"]+[Opening "Czech Benoni"]+[Variation "King's Indian system"]++1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6 *++[ECO "A57"]+[Opening "Benko gambit"]++1. d4 Nf6 2. c4 c5 3. d5 b5 *++[ECO "A57"]+[Opening "Benko gambit half accepted"]++1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 *++[ECO "A57"]+[Opening "Benko gambit"]+[Variation "Zaitsev system"]++1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 *++[ECO "A57"]+[Opening "Benko gambit"]+[Variation "Nescafe Frappe attack"]++1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5 d6 8. +Bc4 *++[ECO "A58"]+[Opening "Benko gambit accepted"]++1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 *++[ECO "A58"]+[Opening "Benko gambit"]+[Variation "Nd2 variation"]++1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8.+Nd2 *++[ECO "A58"]+[Opening "Benko gambit"]+[Variation "fianchetto variation"]++1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8.+g3 *++[ECO "A59"]+[Opening "Benko gambit"]+[Variation "7.e4"]++1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 *++[ECO "A59"]+[Opening "Benko gambit"]+[Variation "Ne2 variation"]++1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 Bxf1 8.+Kxf1 g6 9. Nge2 *++[ECO "A59"]+[Opening "Benko gambit"]++1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 Bxf1 8.+Kxf1 g6 9. g3 *++[ECO "A59"]+[Opening "Benko gambit"]+[Variation "main line"]++1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 Bxf1 8.+Kxf1 g6 9. g3 Bg7 10. Kg2 O-O 11. Nf3 *++[ECO "A60"]+[Opening "Benoni defence"]++1. d4 Nf6 2. c4 c5 3. d5 e6 *++[ECO "A61"]+[Opening "Benoni defence"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 *++[ECO "A61"]+[Opening "Benoni"]+[Variation "Uhlmann variation"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. Bg5 *++[ECO "A61"]+[Opening "Benoni"]+[Variation "Nimzovich (knight's tour) variation"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. Nd2 *++[ECO "A61"]+[Opening "Benoni"]+[Variation "fianchetto variation"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. g3 *++[ECO "A62"]+[Opening "Benoni"]+[Variation "fianchetto variation"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. g3 Bg7 8. +Bg2 O-O *++[ECO "A63"]+[Opening "Benoni"]+[Variation "fianchetto, 9...Nbd7"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. g3 Bg7 8. +Bg2 O-O 9. O-O Nbd7 *++[ECO "A64"]+[Opening "Benoni"]+[Variation "fianchetto, 11...Re8"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. g3 Bg7 8. +Bg2 O-O 9. O-O Nbd7 10. Nd2 a6 11. a4 Re8 *++[ECO "A65"]+[Opening "Benoni"]+[Variation "6.e4"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 *++[ECO "A66"]+[Opening "Benoni"]+[Variation "pawn storm variation"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 *++[ECO "A66"]+[Opening "Benoni"]+[Variation "Mikenas variation"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. e5+*++[ECO "A67"]+[Opening "Benoni"]+[Variation "Taimanov variation"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. +Bb5+ *++[ECO "A68"]+[Opening "Benoni"]+[Variation "four pawns attack"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. +Nf3 O-O *++[ECO "A69"]+[Opening "Benoni"]+[Variation "four pawns attack, main line"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. +Nf3 O-O 9. Be2 Re8 *++[ECO "A70"]+[Opening "Benoni"]+[Variation "classical with e4 and Nf3"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 *++[ECO "A70"]+[Opening "Benoni"]+[Variation "classical without 9.O-O"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. +Be2 *++[ECO "A71"]+[Opening "Benoni"]+[Variation "classical, 8.Bg5"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. +Bg5 *++[ECO "A72"]+[Opening "Benoni"]+[Variation "classical without 9.O-O"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. +Be2 O-O *++[ECO "A73"]+[Opening "Benoni"]+[Variation "classical, 9.O-O"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. +Be2 O-O 9. O-O *++[ECO "A74"]+[Opening "Benoni"]+[Variation "classical, 9...a6, 10.a4"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. +Be2 O-O 9. O-O a6 10. a4 *++[ECO "A75"]+[Opening "Benoni"]+[Variation "classical with ...a6 and 10...Bg4"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. +Be2 O-O 9. O-O a6 10. a4 Bg4 *++[ECO "A76"]+[Opening "Benoni"]+[Variation "classical, 9...Re8"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. +Be2 O-O 9. O-O Re8 *++[ECO "A77"]+[Opening "Benoni"]+[Variation "classical, 9...Re8, 10.Nd2"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. +Be2 O-O 9. O-O Re8 10. Nd2 *++[ECO "A78"]+[Opening "Benoni"]+[Variation "classical with ...Re8 and ...Na6"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. +Be2 O-O 9. O-O Re8 10. Nd2 Na6 *++[ECO "A79"]+[Opening "Benoni"]+[Variation "classical, 11.f3"]++1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. +Be2 O-O 9. O-O Re8 10. Nd2 Na6 11. f3 *++[ECO "A80"]+[Opening "Dutch"]++1. d4 f5 *++[ECO "A80"]+[Opening "Dutch, Spielmann gambit"]++1. d4 f5 2. Nc3 Nf6 3. g4 *++[ECO "A80"]+[Opening "Dutch, Manhattan (Alapin, Ulvestad) variation"]++1. d4 f5 2. Qd3 *++[ECO "A80"]+[Opening "Dutch, Von Pretzel gambit"]++1. d4 f5 2. Qd3 e6 3. g4 *++[ECO "A80"]+[Opening "Dutch, Korchnoi attack"]++1. d4 f5 2. h3 *++[ECO "A80"]+[Opening "Dutch, Krejcik gambit"]++1. d4 f5 2. g4 *++[ECO "A80"]+[Opening "Dutch, 2.Bg5 variation"]++1. d4 f5 2. Bg5 *++[ECO "A81"]+[Opening "Dutch defence"]++1. d4 f5 2. g3 *++[ECO "A81"]+[Opening "Dutch defence, Blackburne variation"]++1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. Nh3 *++[ECO "A81"]+[Opening "Dutch defence"]++1. d4 f5 2. g3 Nf6 3. Bg2 g6 *++[ECO "A81"]+[Opening "Dutch"]+[Variation "Leningrad, Basman system"]++1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nf3 c6 5. O-O Nh6 *++[ECO "A81"]+[Opening "Dutch"]+[Variation "Leningrad, Karlsbad variation"]++1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nh3 *++[ECO "A82"]+[Opening "Dutch"]+[Variation "Staunton gambit"]++1. d4 f5 2. e4 *++[ECO "A82"]+[Opening "Dutch"]+[Variation "Balogh defence"]++1. d4 f5 2. e4 d6 *++[ECO "A82"]+[Opening "Dutch"]+[Variation "Staunton gambit"]++1. d4 f5 2. e4 fxe4 *++[ECO "A82"]+[Opening "Dutch"]+[Variation "Staunton gambit, Tartakower variation"]++1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4 *++[ECO "A83"]+[Opening "Dutch"]+[Variation "Staunton gambit, Staunton's line"]++1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 *++[ECO "A83"]+[Opening "Dutch"]+[Variation "Staunton gambit, Alekhine variation"]++1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. h4 *++[ECO "A83"]+[Opening "Dutch"]+[Variation "Staunton gambit, Lasker variation"]++1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. f3 *++[ECO "A83"]+[Opening "Dutch"]+[Variation "Staunton gambit, Chigorin variation"]++1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 c6 *++[ECO "A83"]+[Opening "Dutch"]+[Variation "Staunton gambit, Nimzovich variation"]++1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 b6 *++[ECO "A84"]+[Opening "Dutch defence"]++1. d4 f5 2. c4 *++[ECO "A84"]+[Opening "Dutch defence"]+[Variation "Bladel variation"]++1. d4 f5 2. c4 g6 3. Nc3 Nh6 *++[ECO "A84"]+[Opening "Dutch defence"]++1. d4 f5 2. c4 e6 *++[ECO "A84"]+[Opening "Dutch defence, Rubinstein variation"]++1. d4 f5 2. c4 e6 3. Nc3 *++[ECO "A84"]+[Opening "Dutch"]+[Variation "Staunton gambit deferred"]++1. d4 f5 2. c4 e6 3. e4 *++[ECO "A84"]+[Opening "Dutch defence"]++1. d4 f5 2. c4 Nf6 *++[ECO "A85"]+[Opening "Dutch with c4 & Nc3"]++1. d4 f5 2. c4 Nf6 3. Nc3 *++[ECO "A86"]+[Opening "Dutch with c4 & g3"]++1. d4 f5 2. c4 Nf6 3. g3 *++[ECO "A86"]+[Opening "Dutch"]+[Variation "Hort-Antoshin system"]++1. d4 f5 2. c4 Nf6 3. g3 d6 4. Bg2 c6 5. Nc3 Qc7 *++[ECO "A86"]+[Opening "Dutch"]+[Variation "Leningrad variation"]++1. d4 f5 2. c4 Nf6 3. g3 g6 *++[ECO "A87"]+[Opening "Dutch"]+[Variation "Leningrad, main variation"]++1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 *++[ECO "A88"]+[Opening "Dutch"]+[Variation "Leningrad, main variation with c6"]++1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O d6 7. Nc3 c6 *++[ECO "A89"]+[Opening "Dutch"]+[Variation "Leningrad, main variation with Nc6"]++1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O d6 7. Nc3 Nc6 *++[ECO "A90"]+[Opening "Dutch defence"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 *++[ECO "A90"]+[Opening "Dutch defence"]+[Variation "Dutch-Indian (Nimzo-Dutch) variation"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Bb4+ *++[ECO "A90"]+[Opening "Dutch-Indian, Alekhine variation"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Bb4+ 5. Bd2 Be7 *++[ECO "A91"]+[Opening "Dutch defence"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 *++[ECO "A92"]+[Opening "Dutch defence"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O *++[ECO "A92"]+[Opening "Dutch defence, Alekhine variation"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O Ne4 *++[ECO "A92"]+[Opening "Dutch"]+[Variation "stonewall variation"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 *++[ECO "A92"]+[Opening "Dutch"]+[Variation "stonewall with Nc3"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 *++[ECO "A93"]+[Opening "Dutch"]+[Variation "stonewall, Botwinnik variation"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3 *++[ECO "A94"]+[Opening "Dutch"]+[Variation "stonewall with Ba3"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3 c6 8. Ba3+*++[ECO "A95"]+[Opening "Dutch"]+[Variation "stonewall with Nc3"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6 *++[ECO "A95"]+[Opening "Dutch"]+[Variation "stonewall: Chekhover variation"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6 8. +Qc2 Qe8 9. Bg5 *++[ECO "A96"]+[Opening "Dutch"]+[Variation "classical variation"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 *++[ECO "A97"]+[Opening "Dutch"]+[Variation "Ilyin-Genevsky variation"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 *++[ECO "A97"]+[Opening "Dutch"]+[Variation "Ilyin-Genevsky, Winter variation"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. +Re1 *++[ECO "A98"]+[Opening "Dutch"]+[Variation "Ilyin-Genevsky variation with Qc2"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. +Qc2 *++[ECO "A99"]+[Opening "Dutch"]+[Variation "Ilyin-Genevsky variation with b3"]++1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. +b3 *++[ECO "B00"]+[Opening "King's pawn opening"]++1. e4 *++[ECO "B00"]+[Opening "Hippopotamus defence"]++1. e4 Nh6 2. d4 g6 3. c4 f6 *++[ECO "B00"]+[Opening "Corn stalk defence"]++1. e4 a5 *++[ECO "B00"]+[Opening "Lemming defence"]++1. e4 Na6 *++[ECO "B00"]+[Opening "Fred"]++1. e4 f5 *++[ECO "B00"]+[Opening "Barnes defence"]++1. e4 f6 *++[ECO "B00"]+[Opening "Fried fox defence"]++1. e4 f6 2. d4 Kf7 *++[ECO "B00"]+[Opening "Carr's defence"]++1. e4 h6 *++[ECO "B00"]+[Opening "Reversed Grob (Borg/Basman defence/macho Grob)"]++1. e4 g5 *++[ECO "B00"]+[Opening "St. George (Baker) defence"]++1. e4 a6 *++[ECO "B00"]+[Opening "Owen defence"]++1. e4 b6 *++[ECO "B00"]+[Opening "Guatemala defence"]++1. e4 b6 2. d4 Ba6 *++[ECO "B00"]+[Opening "KP"]+[Variation "Nimzovich defence"]++1. e4 Nc6 *++[ECO "B00"]+[Opening "KP"]+[Variation "Nimzovich defence, Wheeler gambit"]++1. e4 Nc6 2. b4 Nxb4 3. c3 Nc6 4. d4 *++[ECO "B00"]+[Opening "KP"]+[Variation "Nimzovich defence"]++1. e4 Nc6 2. Nf3 *++[ECO "B00"]+[Opening "KP"]+[Variation "Colorado counter"]++1. e4 Nc6 2. Nf3 f5 *++[ECO "B00"]+[Opening "KP"]+[Variation "Nimzovich defence"]++1. e4 Nc6 2. d4 *++[ECO "B00"]+[Opening "KP"]+[Variation "Nimzovich defence, Marshall gambit"]++1. e4 Nc6 2. d4 d5 3. exd5 Qxd5 4. Nc3 *++[ECO "B00"]+[Opening "KP"]+[Variation "Nimzovich defence, Bogolyubov variation"]++1. e4 Nc6 2. d4 d5 3. Nc3 *++[ECO "B00"]+[Opening "KP"]+[Variation "Neo-Mongoloid defence"]++1. e4 Nc6 2. d4 f6 *++[ECO "B01"]+[Opening "Scandinavian (centre counter) defence"]++1. e4 d5 *++[ECO "B01"]+[Opening "Scandinavian defence, Lasker variation"]++1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bg4 6. h3 *++[ECO "B01"]+[Opening "Scandinavian defence"]++1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5 *++[ECO "B01"]+[Opening "Scandinavian defence, Gruenfeld variation"]++1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5 6. Ne5 c6 7. g4 *++[ECO "B01"]+[Opening "Scandinavian"]+[Variation "Anderssen counter-attack"]++1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 *++[ECO "B01"]+[Opening "Scandinavian"]+[Variation "Anderssen counter-attack orthodox attack"]++1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. dxe5 Bb4 6. Bd2 Nc6 7. Nf3 *++[ECO "B01"]+[Opening "Scandinavian"]+[Variation "Anderssen counter-attack, Goteborg system"]++1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. Nf3 *++[ECO "B01"]+[Opening "Scandinavian"]+[Variation "Anderssen counter-attack, Collijn variation"]++1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. Nf3 Bg4 *++[ECO "B01"]+[Opening "Scandinavian, Mieses-Kotrvc gambit"]++1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. b4 *++[ECO "B01"]+[Opening "Scandinavian"]+[Variation "Pytel-Wade variation"]++1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 *++[ECO "B01"]+[Opening "Scandinavian defence"]++1. e4 d5 2. exd5 Nf6 *++[ECO "B01"]+[Opening "Scandinavian"]+[Variation "Icelandic gambit"]++1. e4 d5 2. exd5 Nf6 3. c4 e6 *++[ECO "B01"]+[Opening "Scandinavian gambit"]++1. e4 d5 2. exd5 Nf6 3. c4 c6 *++[ECO "B01"]+[Opening "Scandinavian defence"]++1. e4 d5 2. exd5 Nf6 3. d4 *++[ECO "B01"]+[Opening "Scandinavian"]+[Variation "Marshall variation"]++1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 *++[ECO "B01"]+[Opening "Scandinavian"]+[Variation "Kiel variation"]++1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. c4 Nb4 *++[ECO "B01"]+[Opening "Scandinavian"]+[Variation "Richter variation"]++1. e4 d5 2. exd5 Nf6 3. d4 g6 *++[ECO "B02"]+[Opening "Alekhine's defence"]++1. e4 Nf6 *++[ECO "B02"]+[Opening "Alekhine's defence"]+[Variation "Scandinavian variation"]++1. e4 Nf6 2. Nc3 d5 *++[ECO "B02"]+[Opening "Alekhine's defence"]+[Variation "Spielmann variation"]++1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. e6 *++[ECO "B02"]+[Opening "Alekhine's defence"]+[Variation "Maroczy variation"]++1. e4 Nf6 2. d3 *++[ECO "B02"]+[Opening "Alekhine's defence"]+[Variation "Krejcik variation"]++1. e4 Nf6 2. Bc4 *++[ECO "B02"]+[Opening "Alekhine's defence"]+[Variation "Mokele Mbembe (Buecker) variation"]++1. e4 Nf6 2. e5 Ne4 *++[ECO "B02"]+[Opening "Alekhine's defence"]+[Variation "Brooklyn defence"]++1. e4 Nf6 2. e5 Ng8 *++[ECO "B02"]+[Opening "Alekhine's defence"]++1. e4 Nf6 2. e5 Nd5 *++[ECO "B02"]+[Opening "Alekhine's defence"]+[Variation "Kmoch variation"]++1. e4 Nf6 2. e5 Nd5 3. Bc4 Nb6 4. Bb3 c5 5. d3 *++[ECO "B02"]+[Opening "Alekhine's defence"]+[Variation "Saemisch attack"]++1. e4 Nf6 2. e5 Nd5 3. Nc3 *++[ECO "B02"]+[Opening "Alekhine's defence"]+[Variation "Welling variation"]++1. e4 Nf6 2. e5 Nd5 3. b3 *++[ECO "B02"]+[Opening "Alekhine's defence"]++1. e4 Nf6 2. e5 Nd5 3. c4 *++[ECO "B02"]+[Opening "Alekhine's defence"]+[Variation "Steiner variation"]++1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. b3 *++[ECO "B02"]+[Opening "Alekhine's defence"]+[Variation "two pawns' (Lasker's) attack"]++1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 *++[ECO "B02"]+[Opening "Alekhine's defence"]+[Variation "two pawns' attack, Mikenas variation"]++1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 e6 6. Nc3 d6 *++[ECO "B03"]+[Opening "Alekhine's defence"]++1. e4 Nf6 2. e5 Nd5 3. d4 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "O'Sullivan gambit"]++1. e4 Nf6 2. e5 Nd5 3. d4 b5 *++[ECO "B03"]+[Opening "Alekhine's defence"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "Balogh variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Bc4 *++[ECO "B03"]+[Opening "Alekhine's defence"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "exchange variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "exchange, Karpov variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 cxd6 6. Nf3 g6 7. Be2 Bg7 8.+O-O O-O 9. h3 Nc6 10. Nc3 Bf5 11. Bf4 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "four pawns attack"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "four pawns attack, Korchnoi variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Bf5 7. Nc3 e6 8.+Nf3 Be7 9. Be2 O-O 10. O-O f6 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "four pawns attack, 6...Nc6"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "four pawns attack, Ilyin-Genevsky var."]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Nf3 Bg4 8.+e6 fxe6 9. c5 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "four pawns attack, 7.Be3"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "four pawns attack, Tartakower variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3 Bf5 8.+Nc3 e6 9. Nf3 Qd7 10. Be2 O-O-O 11. O-O Be7 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "four pawns attack, Planinc variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 g5 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "four pawns attack, fianchetto variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 g6 *++[ECO "B03"]+[Opening "Alekhine's defence"]+[Variation "four pawns attack, Trifunovic variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 Bf5 *++[ECO "B04"]+[Opening "Alekhine's defence"]+[Variation "modern variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 *++[ECO "B04"]+[Opening "Alekhine's defence"]+[Variation "modern, Larsen variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 dxe5 *++[ECO "B04"]+[Opening "Alekhine's defence"]+[Variation "modern, Schmid variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Nb6 *++[ECO "B04"]+[Opening "Alekhine's defence"]+[Variation "modern, fianchetto variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 *++[ECO "B04"]+[Opening "Alekhine's defence"]+[Variation "modern, Keres variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. Bc4 Nb6 6. Bb3 Bg7 7. a4 *++[ECO "B05"]+[Opening "Alekhine's defence"]+[Variation "modern variation, 4...Bg4"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 *++[ECO "B05"]+[Opening "Alekhine's defence"]+[Variation "modern, Flohr variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 c6 *++[ECO "B05"]+[Opening "Alekhine's defence"]+[Variation "modern, Panov variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. h3 *++[ECO "B05"]+[Opening "Alekhine's defence"]+[Variation "modern, Alekhine variation"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. c4 *++[ECO "B05"]+[Opening "Alekhine's defence"]+[Variation "modern, Vitolins attack"]++1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. c4 Nb6 6. d5 *++[ECO "B06"]+[Opening "Robatsch (modern) defence"]++1. e4 g6 *++[ECO "B06"]+[Opening "Norwegian defence"]++1. e4 g6 2. d4 Nf6 3. e5 Nh5 4. g4 Ng7 *++[ECO "B06"]+[Opening "Robatsch (modern) defence"]++1. e4 g6 2. d4 Bg7 *++[ECO "B06"]+[Opening "Robatsch defence"]+[Variation "three pawns attack"]++1. e4 g6 2. d4 Bg7 3. f4 *++[ECO "B06"]+[Opening "Robatsch defence"]++1. e4 g6 2. d4 Bg7 3. Nc3 *++[ECO "B06"]+[Opening "Robatsch defence"]+[Variation "Gurgenidze variation"]++1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. f4 d5 5. e5 h5 *++[ECO "B06"]+[Opening "Robatsch (modern) defence"]++1. e4 g6 2. d4 Bg7 3. Nc3 d6 *++[ECO "B06"]+[Opening "Robatsch defence"]+[Variation "two knights variation"]++1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3 *++[ECO "B06"]+[Opening "Robatsch defence"]+[Variation "two knights, Suttles variation"]++1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3 c6 *++[ECO "B06"]+[Opening "Robatsch defence"]+[Variation "Pseudo-Austrian attack"]++1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 *++[ECO "B07"]+[Opening "Pirc defence"]++1. e4 d6 2. d4 Nf6 3. Nc3 *++[ECO "B07"]+[Opening "Pirc"]+[Variation "Ufimtsev-Pytel variation"]++1. e4 d6 2. d4 Nf6 3. Nc3 c6 *++[ECO "B07"]+[Opening "Pirc defence"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 *++[ECO "B07"]+[Opening "Pirc"]+[Variation "150 attack"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 c6 5. Qd2 *++[ECO "B07"]+[Opening "Pirc"]+[Variation "Sveshnikov system"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. g3 *++[ECO "B07"]+[Opening "Pirc"]+[Variation "Holmov system"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bc4 *++[ECO "B07"]+[Opening "Pirc"]+[Variation "Byrne variation"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 *++[ECO "B07"]+[Opening "Pirc defence"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 *++[ECO "B07"]+[Opening "Pirc"]+[Variation "Chinese variation"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 Bg7 5. g4 *++[ECO "B07"]+[Opening "Pirc"]+[Variation "bayonet (Mariotti) attack"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 Bg7 5. h4 *++[ECO "B07"]+[Opening "Robatsch defence"]+[Variation "Geller's system"]++1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c3 *++[ECO "B08"]+[Opening "Pirc"]+[Variation "classical (two knights) system"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 *++[ECO "B08"]+[Opening "Pirc"]+[Variation "classical (two knights) system"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 *++[ECO "B08"]+[Opening "Pirc"]+[Variation "classical, h3 system"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. h3 *++[ECO "B08"]+[Opening "Pirc"]+[Variation "classical system, 5.Be2"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 *++[ECO "B09"]+[Opening "Pirc"]+[Variation "Austrian attack"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 *++[ECO "B09"]+[Opening "Pirc"]+[Variation "Austrian attack"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O *++[ECO "B09"]+[Opening "Pirc"]+[Variation "Austrian attack, 6.e5"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. e5 *++[ECO "B09"]+[Opening "Pirc"]+[Variation "Austrian attack, 6.Be3"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Be3 *++[ECO "B09"]+[Opening "Pirc"]+[Variation "Austrian attack, 6.Bd3"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Bd3 *++[ECO "B09"]+[Opening "Pirc"]+[Variation "Austrian attack, dragon formation"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5 *++[ECO "B09"]+[Opening "Pirc"]+[Variation "Austrian attack, Ljubojevic variation"]++1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Bc4 *++[ECO "B10"]+[Opening "Caro-Kann defence"]++1. e4 c6 *++[ECO "B10"]+[Opening "Caro-Kann"]+[Variation "Hillbilly attack"]++1. e4 c6 2. Bc4 *++[ECO "B10"]+[Opening "Caro-Kann"]+[Variation "anti-Caro-Kann defence"]++1. e4 c6 2. c4 *++[ECO "B10"]+[Opening "Caro-Kann"]+[Variation "anti-anti-Caro-Kann defence"]++1. e4 c6 2. c4 d5 *++[ECO "B10"]+[Opening "Caro-Kann"]+[Variation "closed (Breyer) variation"]++1. e4 c6 2. d3 *++[ECO "B10"]+[Opening "Caro-Kann defence"]++1. e4 c6 2. Nc3 *++[ECO "B10"]+[Opening "Caro-Kann"]+[Variation "Goldman (Spielmann) variation"]++1. e4 c6 2. Nc3 d5 3. Qf3 *++[ECO "B10"]+[Opening "Caro-Kann"]+[Variation "two knights variation"]++1. e4 c6 2. Nc3 d5 3. Nf3 *++[ECO "B11"]+[Opening "Caro-Kann"]+[Variation "two knights, 3...Bg4"]++1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 *++[ECO "B12"]+[Opening "Caro-Kann defence"]++1. e4 c6 2. d4 *++[ECO "B12"]+[Opening "de Bruycker defence"]++1. e4 c6 2. d4 Na6 3. Nc3 Nc7 *++[ECO "B12"]+[Opening "Caro-Masi defence"]++1. e4 c6 2. d4 Nf6 *++[ECO "B12"]+[Opening "Caro-Kann defence"]++1. e4 c6 2. d4 d5 *++[ECO "B12"]+[Opening "Caro-Kann"]+[Variation "Tartakower (fantasy) variation"]++1. e4 c6 2. d4 d5 3. f3 *++[ECO "B12"]+[Opening "Caro-Kann"]+[Variation "3.Nd2"]++1. e4 c6 2. d4 d5 3. Nd2 *++[ECO "B12"]+[Opening "Caro-Kann"]+[Variation "Edinburgh variation"]++1. e4 c6 2. d4 d5 3. Nd2 Qb6 *++[ECO "B12"]+[Opening "Caro-Kann"]+[Variation "advance variation"]++1. e4 c6 2. d4 d5 3. e5 *++[ECO "B12"]+[Opening "Caro-Kann"]+[Variation "advance, Short variation"]++1. e4 c6 2. d4 d5 3. e5 Bf5 4. c3 e6 5. Be2 *++[ECO "B13"]+[Opening "Caro-Kann"]+[Variation "exchange variation"]++1. e4 c6 2. d4 d5 3. exd5 *++[ECO "B13"]+[Opening "Caro-Kann"]+[Variation "exchange, Rubinstein variation"]++1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4 *++[ECO "B13"]+[Opening "Caro-Kann"]+[Variation "Panov-Botvinnik attack"]++1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 *++[ECO "B13"]+[Opening "Caro-Kann"]+[Variation "Panov-Botvinnik, Gunderam attack"]++1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. c5 *++[ECO "B13"]+[Opening "Caro-Kann"]+[Variation "Panov-Botvinnik attack"]++1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 *++[ECO "B13"]+[Opening "Caro-Kann"]+[Variation "Panov-Botvinnik, Herzog defence"]++1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 dxc4 7. d5 Na5 *++[ECO "B13"]+[Opening "Caro-Kann"]+[Variation "Panov-Botvinnik, normal variation"]++1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 e6 *++[ECO "B13"]+[Opening "Caro-Kann"]+[Variation "Panov-Botvinnik, Czerniak variation"]++1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 Qa5 *++[ECO "B13"]+[Opening "Caro-Kann"]+[Variation "Panov-Botvinnik, Reifir (Spielmann) variation"]++1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 Qb6 *++[ECO "B14"]+[Opening "Caro-Kann"]+[Variation "Panov-Botvinnik attack, 5...e6"]++1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 *++[ECO "B14"]+[Opening "Caro-Kann"]+[Variation "Panov-Botvinnik attack, 5...g6"]++1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 g6 *++[ECO "B15"]+[Opening "Caro-Kann defence"]++1. e4 c6 2. d4 d5 3. Nc3 *++[ECO "B15"]+[Opening "Caro-Kann"]+[Variation "Gurgenidze counter-attack"]++1. e4 c6 2. d4 d5 3. Nc3 b5 *++[ECO "B15"]+[Opening "Caro-Kann"]+[Variation "Gurgenidze system"]++1. e4 c6 2. d4 d5 3. Nc3 g6 *++[ECO "B15"]+[Opening "Caro-Kann"]+[Variation "Rasa-Studier gambit"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. f3 *++[ECO "B15"]+[Opening "Caro-Kann defence"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 *++[ECO "B15"]+[Opening "Caro-Kann"]+[Variation "Alekhine gambit"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Bd3 *++[ECO "B15"]+[Opening "Caro-Kann"]+[Variation "Tartakower (Nimzovich) variation"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 *++[ECO "B15"]+[Opening "Caro-Kann"]+[Variation "Forgacs variation"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. Bc4 *++[ECO "B16"]+[Opening "Caro-Kann"]+[Variation "Bronstein-Larsen variation"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 *++[ECO "B17"]+[Opening "Caro-Kann"]+[Variation "Steinitz variation"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 *++[ECO "B18"]+[Opening "Caro-Kann"]+[Variation "classical variation"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 *++[ECO "B18"]+[Opening "Caro-Kann"]+[Variation "classical, Flohr variation"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nh3 *++[ECO "B18"]+[Opening "Caro-Kann"]+[Variation "classical, Maroczy attack"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. f4 *++[ECO "B18"]+[Opening "Caro-Kann"]+[Variation "classical, 6.h4"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 *++[ECO "B19"]+[Opening "Caro-Kann"]+[Variation "classical, 7...Nd7"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 *++[ECO "B19"]+[Opening "Caro-Kann"]+[Variation "classical, Spassky variation"]++1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8.+h5 *++[ECO "B20"]+[Opening "Sicilian defence"]++1. e4 c5 *++[ECO "B20"]+[Opening "Sicilian"]+[Variation "Gloria variation"]++1. e4 c5 2. c4 d6 3. Nc3 Nc6 4. g3 h5 *++[ECO "B20"]+[Opening "Sicilian"]+[Variation "Steinitz variation"]++1. e4 c5 2. g3 *++[ECO "B20"]+[Opening "Sicilian"]+[Variation "wing gambit"]++1. e4 c5 2. b4 *++[ECO "B20"]+[Opening "Sicilian"]+[Variation "wing gambit, Santasiere variation"]++1. e4 c5 2. b4 cxb4 3. c4 *++[ECO "B20"]+[Opening "Sicilian"]+[Variation "wing gambit, Marshall variation"]++1. e4 c5 2. b4 cxb4 3. a3 *++[ECO "B20"]+[Opening "Sicilian"]+[Variation "wing gambit, Marienbad variation"]++1. e4 c5 2. b4 cxb4 3. a3 d5 4. exd5 Qxd5 5. Bb2 *++[ECO "B20"]+[Opening "Sicilian"]+[Variation "wing gambit, Carlsbad variation"]++1. e4 c5 2. b4 cxb4 3. a3 bxa3 *++[ECO "B20"]+[Opening "Sicilian"]+[Variation "Keres variation (2.Ne2)"]++1. e4 c5 2. Ne2 *++[ECO "B21"]+[Opening "Sicilian"]+[Variation "Grand Prix attack"]++1. e4 c5 2. f4 *++[ECO "B21"]+[Opening "Sicilian"]+[Variation "Smith-Morra gambit"]++1. e4 c5 2. d4 *++[ECO "B21"]+[Opening "Sicilian"]+[Variation "Andreaschek gambit"]++1. e4 c5 2. d4 cxd4 3. Nf3 e5 4. c3 *++[ECO "B21"]+[Opening "Sicilian"]+[Variation "Smith-Morra gambit"]++1. e4 c5 2. d4 cxd4 3. c3 *++[ECO "B21"]+[Opening "Sicilian"]+[Variation "Smith-Morra gambit, Chicago defence"]++1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 e6 7. O-O a6 8.+Qe2 b5 9. Bb3 Ra7 *++[ECO "B22"]+[Opening "Sicilian"]+[Variation "Alapin's variation (2.c3)"]++1. e4 c5 2. c3 *++[ECO "B22"]+[Opening "Sicilian"]+[Variation "2.c3, Heidenfeld variation"]++1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3 *++[ECO "B23"]+[Opening "Sicilian"]+[Variation "closed"]++1. e4 c5 2. Nc3 *++[ECO "B23"]+[Opening "Sicilian"]+[Variation "closed, Korchnoi variation"]++1. e4 c5 2. Nc3 e6 3. g3 d5 *++[ECO "B23"]+[Opening "Sicilian"]+[Variation "closed, 2...Nc6"]++1. e4 c5 2. Nc3 Nc6 *++[ECO "B23"]+[Opening "Sicilian"]+[Variation "chameleon variation"]++1. e4 c5 2. Nc3 Nc6 3. Nge2 *++[ECO "B23"]+[Opening "Sicilian"]+[Variation "Grand Prix attack"]++1. e4 c5 2. Nc3 Nc6 3. f4 *++[ECO "B23"]+[Opening "Sicilian"]+[Variation "Grand Prix attack, Schofman variation"]++1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bc4 e6 6. f5 *++[ECO "B24"]+[Opening "Sicilian"]+[Variation "closed"]++1. e4 c5 2. Nc3 Nc6 3. g3 *++[ECO "B24"]+[Opening "Sicilian"]+[Variation "closed, Smyslov variation"]++1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. Be3 Nd4 7. Nce2 *++[ECO "B25"]+[Opening "Sicilian"]+[Variation "closed"]++1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 *++[ECO "B25"]+[Opening "Sicilian"]+[Variation "closed, 6.Ne2 e5 (Botvinnik)"]++1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Nge2 e5 *++[ECO "B25"]+[Opening "Sicilian"]+[Variation "closed, 6.f4"]++1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 *++[ECO "B25"]+[Opening "Sicilian"]+[Variation "closed, 6.f4 e5 (Botvinnik)"]++1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5 *++[ECO "B26"]+[Opening "Sicilian"]+[Variation "closed, 6.Be3"]++1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Be3 *++[ECO "B27"]+[Opening "Sicilian defence"]++1. e4 c5 2. Nf3 *++[ECO "B27"]+[Opening "Sicilian"]+[Variation "Stiletto (Althouse) variation"]++1. e4 c5 2. Nf3 Qa5 *++[ECO "B27"]+[Opening "Sicilian"]+[Variation "Quinteros variation"]++1. e4 c5 2. Nf3 Qc7 *++[ECO "B27"]+[Opening "Sicilian"]+[Variation "Katalimov variation"]++1. e4 c5 2. Nf3 b6 *++[ECO "B27"]+[Opening "Sicilian"]+[Variation "Hungarian variation"]++1. e4 c5 2. Nf3 g6 *++[ECO "B27"]+[Opening "Sicilian"]+[Variation "Acton extension"]++1. e4 c5 2. Nf3 g6 3. c4 Bh6 *++[ECO "B28"]+[Opening "Sicilian"]+[Variation "O'Kelly variation"]++1. e4 c5 2. Nf3 a6 *++[ECO "B29"]+[Opening "Sicilian"]+[Variation "Nimzovich-Rubinstein variation"]++1. e4 c5 2. Nf3 Nf6 *++[ECO "B29"]+[Opening "Sicilian"]+[Variation "Nimzovich-Rubinstein; Rubinstein counter-gambit"]++1. e4 c5 2. Nf3 Nf6 3. e5 Nd5 4. Nc3 e6 5. Nxd5 exd5 6. d4 Nc6 *++[ECO "B30"]+[Opening "Sicilian defence"]++1. e4 c5 2. Nf3 Nc6 *++[ECO "B30"]+[Opening "Sicilian"]+[Variation "Nimzovich-Rossolimo attack (without ...d6)"]++1. e4 c5 2. Nf3 Nc6 3. Bb5 *++[ECO "B31"]+[Opening "Sicilian"]+[Variation "Nimzovich-Rossolimo attack (with ...g6, without ...d6)"]++1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 *++[ECO "B31"]+[Opening "Sicilian"]+[Variation "Nimzovich-Rossolimo attack, Gurgenidze variation"]++1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Re1 e5 6. b4 *++[ECO "B32"]+[Opening "Sicilian defence"]++1. e4 c5 2. Nf3 Nc6 3. d4 *++[ECO "B32"]+[Opening "Sicilian"]+[Variation "Flohr variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qc7 *++[ECO "B32"]+[Opening "Sicilian"]+[Variation "Nimzovich variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d5 *++[ECO "B32"]+[Opening "Sicilian"]+[Variation "Labourdonnais-Loewenthal variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 *++[ECO "B32"]+[Opening "Sicilian"]+[Variation "Labourdonnais-Loewenthal (Kalashnikov) variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 *++[ECO "B33"]+[Opening "Sicilian defence"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 *++[ECO "B33"]+[Opening "Sicilian"]+[Variation "Pelikan (Lasker/Sveshnikov) variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 *++[ECO "B33"]+[Opening "Sicilian"]+[Variation "Pelikan, Bird variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 +8. Na3 Be6 *++[ECO "B33"]+[Opening "Sicilian"]+[Variation "Pelikan, Chelyabinsk variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 +8. Na3 b5 *++[ECO "B33"]+[Opening "Sicilian"]+[Variation "Sveshnikov variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 +8. Na3 b5 9. Bxf6 gxf6 10. Nd5 f5 *++[ECO "B34"]+[Opening "Sicilian"]+[Variation "accelerated fianchetto, exchange variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nxc6 *++[ECO "B34"]+[Opening "Sicilian"]+[Variation "accelerated fianchetto, modern variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 *++[ECO "B35"]+[Opening "Sicilian"]+[Variation "accelerated fianchetto, modern variation with Bc4"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 *++[ECO "B36"]+[Opening "Sicilian"]+[Variation "accelerated fianchetto, Maroczy bind"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 *++[ECO "B36"]+[Opening "Sicilian"]+[Variation "accelerated fianchetto, Gurgenidze variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6+*++[ECO "B37"]+[Opening "Sicilian"]+[Variation "accelerated fianchetto, Maroczy bind, 5...Bg7"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 *++[ECO "B37"]+[Opening "Sicilian"]+[Variation "accelerated fianchetto, Simagin variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Nc2 d6 7. Be2 Nh6 *++[ECO "B38"]+[Opening "Sicilian"]+[Variation "accelerated fianchetto, Maroczy bind, 6.Be3"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3 *++[ECO "B39"]+[Opening "Sicilian"]+[Variation "accelerated fianchetto, Breyer variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 Ng4 *++[ECO "B40"]+[Opening "Sicilian defence"]++1. e4 c5 2. Nf3 e6 *++[ECO "B40"]+[Opening "Sicilian"]+[Variation "Marshall variation"]++1. e4 c5 2. Nf3 e6 3. d4 d5 *++[ECO "B40"]+[Opening "Sicilian defence"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 *++[ECO "B40"]+[Opening "Sicilian"]+[Variation "Anderssen variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 *++[ECO "B40"]+[Opening "Sicilian"]+[Variation "Pin variation (Sicilian counter-attack)"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 *++[ECO "B40"]+[Opening "Sicilian"]+[Variation "Pin, Jaffe variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Bd3 e5 *++[ECO "B40"]+[Opening "Sicilian"]+[Variation "Pin, Koch variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. e5 *++[ECO "B41"]+[Opening "Sicilian"]+[Variation "Kan variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 *++[ECO "B41"]+[Opening "Sicilian"]+[Variation "Kan, Maroczy bind (Reti variation)"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 *++[ECO "B41"]+[Opening "Sicilian"]+[Variation "Kan, Maroczy bind - Bronstein variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Bb4 7. Bd3 Nc6 8.+Bc2 *++[ECO "B42"]+[Opening "Sicilian"]+[Variation "Kan, 5.Bd3"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 *++[ECO "B42"]+[Opening "Sicilian"]+[Variation "Kan, Gipslis variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O d6 7. c4 g6 *++[ECO "B42"]+[Opening "Sicilian"]+[Variation "Kan, Polugaievsky variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Bc5 *++[ECO "B42"]+[Opening "Sicilian"]+[Variation "Kan, Swiss cheese variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 g6 *++[ECO "B43"]+[Opening "Sicilian"]+[Variation "Kan, 5.Nc3"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 *++[ECO "B44"]+[Opening "Sicilian defence"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 *++[ECO "B44"]+[Opening "Sicilian, Szen (`anti-Taimanov') variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 *++[ECO "B44"]+[Opening "Sicilian, Szen, hedgehog variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 d6 6. c4 Nf6 7. N1c3 a6 8.+Na3 Be7 9. Be2 O-O 10. O-O b6 *++[ECO "B44"]+[Opening "Sicilian, Szen variation, Dely-Kasparov gambit"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 d6 6. c4 Nf6 7. N1c3 a6 8.+Na3 d5 *++[ECO "B45"]+[Opening "Sicilian"]+[Variation "Taimanov variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 *++[ECO "B45"]+[Opening "Sicilian"]+[Variation "Taimanov, American attack"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Ndb5 Bb4 7. Nd6+ *++[ECO "B46"]+[Opening "Sicilian"]+[Variation "Taimanov variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 *++[ECO "B47"]+[Opening "Sicilian"]+[Variation "Taimanov (Bastrikov) variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 *++[ECO "B48"]+[Opening "Sicilian"]+[Variation "Taimanov variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 *++[ECO "B49"]+[Opening "Sicilian"]+[Variation "Taimanov variation"]++1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Be2 *++[ECO "B50"]+[Opening "Sicilian"]++1. e4 c5 2. Nf3 d6 *++[ECO "B50"]+[Opening "Sicilian"]+[Variation "wing gambit deferred"]++1. e4 c5 2. Nf3 d6 3. b4 *++[ECO "B51"]+[Opening "Sicilian"]+[Variation "Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack"]++1. e4 c5 2. Nf3 d6 3. Bb5+ *++[ECO "B52"]+[Opening "Sicilian"]+[Variation "Canal-Sokolsky attack, 3...Bd7"]++1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 *++[ECO "B52"]+[Opening "Sicilian"]+[Variation "Canal-Sokolsky attack, Bronstein gambit"]++1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nc6 6. c3 Nf6 7. d4 *++[ECO "B52"]+[Opening "Sicilian"]+[Variation "Canal-Sokolsky attack, Sokolsky variation"]++1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 *++[ECO "B53"]+[Opening "Sicilian, Chekhover variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 *++[ECO "B53"]+[Opening "Sicilian"]+[Variation "Chekhover, Zaitsev variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Qd7 *++[ECO "B54"]+[Opening "Sicilian"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 *++[ECO "B54"]+[Opening "Sicilian"]+[Variation "Prins (Moscow) variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 *++[ECO "B55"]+[Opening "Sicilian"]+[Variation "Prins variation, Venice attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 e5 6. Bb5+ *++[ECO "B56"]+[Opening "Sicilian"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 *++[ECO "B56"]+[Opening "Sicilian"]+[Variation "Venice attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Bb5+ *++[ECO "B56"]+[Opening "Sicilian"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 *++[ECO "B57"]+[Opening "Sicilian"]+[Variation "Sozin, not Scheveningen"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 *++[ECO "B57"]+[Opening "Sicilian"]+[Variation "Magnus Smith trap"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 g6 7. Nxc6 bxc6+8. e5 *++[ECO "B57"]+[Opening "Sicilian"]+[Variation "Sozin, Benko variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 Qb6 *++[ECO "B58"]+[Opening "Sicilian"]+[Variation "classical"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 *++[ECO "B58"]+[Opening "Sicilian"]+[Variation "Boleslavsky variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 *++[ECO "B58"]+[Opening "Sicilian"]+[Variation "Boleslavsky, Louma variation"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6 *++[ECO "B59"]+[Opening "Sicilian"]+[Variation "Boleslavsky variation, 7.Nb3"]++1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 *++[ECO "B60"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 *++[ECO "B60"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Bondarevsky variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 g6 *++[ECO "B60"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Larsen variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Bd7 *++[ECO "B61"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Larsen variation, 7.Qd2"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Bd7 7. Qd2 *++[ECO "B62"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, 6...e6"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 *++[ECO "B62"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Podvebrady variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Nb3 *++[ECO "B62"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Margate (Alekhine) variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Bb5 *++[ECO "B62"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Richter attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Nxc6 *++[ECO "B62"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Keres variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd3 *++[ECO "B63"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Rauzer attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 *++[ECO "B63"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Rauzer attack, 7...Be7"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 *++[ECO "B64"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9.f4"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 +8. O-O-O O-O 9. f4 *++[ECO "B64"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Rauzer attack, Geller variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 +8. O-O-O O-O 9. f4 e5 *++[ECO "B65"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9...Nxd4"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 +8. O-O-O O-O 9. f4 Nxd4 *++[ECO "B65"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9...Nxd4"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 +8. O-O-O O-O 9. f4 Nxd4 10. Qxd4 *++[ECO "B66"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Rauzer attack, 7...a6"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 *++[ECO "B67"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Rauzer attack, 7...a6 defence, 8...Bd7"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8.+O-O-O Bd7 *++[ECO "B68"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Rauzer attack, 7...a6 defence, 9...Be7"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8.+O-O-O Bd7 9. f4 Be7 *++[ECO "B69"]+[Opening "Sicilian"]+[Variation "Richter-Rauzer, Rauzer attack, 7...a6 defence, 11.Bxf6"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8.+O-O-O Bd7 9. f4 Be7 10. Nf3 b5 11. Bxf6 *++[ECO "B70"]+[Opening "Sicilian"]+[Variation "dragon variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 *++[ECO "B71"]+[Opening "Sicilian"]+[Variation "dragon, Levenfish variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4 *++[ECO "B71"]+[Opening "Sicilian"]+[Variation "dragon, Levenfish; Flohr variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4 Nbd7 *++[ECO "B72"]+[Opening "Sicilian"]+[Variation "dragon, 6.Be3"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 *++[ECO "B72"]+[Opening "Sicilian"]+[Variation "dragon, classical attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 *++[ECO "B72"]+[Opening "Sicilian"]+[Variation "dragon, classical, Amsterdam variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 +8. Qd2 *++[ECO "B72"]+[Opening "Sicilian"]+[Variation "dragon, classical, Grigoriev variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 +8. Qd2 O-O 9. O-O-O *++[ECO "B72"]+[Opening "Sicilian"]+[Variation "dragon, classical, Nottingham variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 +8. Nb3 *++[ECO "B73"]+[Opening "Sicilian"]+[Variation "dragon, classical, 8.O-O"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 +8. O-O *++[ECO "B73"]+[Opening "Sicilian"]+[Variation "dragon, classical, Zollner gambit"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 +8. O-O O-O 9. f4 Qb6 10. e5 *++[ECO "B73"]+[Opening "Sicilian"]+[Variation "dragon, classical, Richter variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 +8. O-O O-O 9. Qd2 *++[ECO "B74"]+[Opening "Sicilian"]+[Variation "dragon, classical, 9.Nb3"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 +8. O-O O-O 9. Nb3 *++[ECO "B74"]+[Opening "Sicilian"]+[Variation "dragon, classical, Stockholm attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 +8. O-O O-O 9. Nb3 Be6 10. f4 Na5 11. f5 Bc4 12. Nxa5 Bxe2 13. Qxe2 Qxa5 14.+g4 *++[ECO "B74"]+[Opening "Sicilian"]+[Variation "dragon, classical, Spielmann variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 +8. O-O O-O 9. Nb3 Be6 10. f4 Na5 11. f5 Bc4 12. Bd3 *++[ECO "B74"]+[Opening "Sicilian"]+[Variation "dragon, classical, Bernard defence"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 +8. O-O O-O 9. Nb3 Be6 10. f4 Na5 11. f5 Bc4 12. Bd3 Bxd3 13. cxd3 d5 *++[ECO "B74"]+[Opening "Sicilian"]+[Variation "dragon, classical, Reti-Tartakower variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 +8. O-O O-O 9. Nb3 Be6 10. f4 Qc8 *++[ECO "B74"]+[Opening "Sicilian"]+[Variation "dragon, classical, Alekhine variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 +8. O-O O-O 9. Nb3 a5 *++[ECO "B75"]+[Opening "Sicilian"]+[Variation "dragon, Yugoslav attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 *++[ECO "B76"]+[Opening "Sicilian"]+[Variation "dragon, Yugoslav attack, 7...O-O"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O *++[ECO "B76"]+[Opening "Sicilian"]+[Variation "dragon, Yugoslav attack, Rauser variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8.+Qd2 Nc6 9. O-O-O *++[ECO "B77"]+[Opening "Sicilian"]+[Variation "dragon, Yugoslav attack, 9.Bc4"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8.+Qd2 Nc6 9. Bc4 *++[ECO "B77"]+[Opening "Sicilian"]+[Variation "dragon, Yugoslav attack, Byrne variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8.+Qd2 Nc6 9. Bc4 a5 *++[ECO "B77"]+[Opening "Sicilian"]+[Variation "dragon, Yugoslav attack, 9...Bd7"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8.+Qd2 Nc6 9. Bc4 Bd7 *++[ECO "B78"]+[Opening "Sicilian"]+[Variation "dragon, Yugoslav attack, 10.O-O-O"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8.+Qd2 Nc6 9. Bc4 Bd7 10. O-O-O *++[ECO "B79"]+[Opening "Sicilian"]+[Variation "dragon, Yugoslav attack, 12.h4"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8.+Qd2 Nc6 9. Bc4 Bd7 10. O-O-O Qa5 11. Bb3 Rfc8 12. h4 *++[ECO "B80"]+[Opening "Sicilian"]+[Variation "Scheveningen variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 *++[ECO "B80"]+[Opening "Sicilian"]+[Variation "Scheveningen, English variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 a6 7. Qd2 *++[ECO "B80"]+[Opening "Sicilian"]+[Variation "Scheveningen, Vitolins variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bb5+ *++[ECO "B80"]+[Opening "Sicilian"]+[Variation "Scheveningen, fianchetto variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 *++[ECO "B81"]+[Opening "Sicilian"]+[Variation "Scheveningen, Keres attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g4 *++[ECO "B82"]+[Opening "Sicilian"]+[Variation "Scheveningen, 6.f4"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. f4 *++[ECO "B82"]+[Opening "Sicilian"]+[Variation "Scheveningen, Tal variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. f4 Nc6 7. Be3 Be7 8.+Qf3 *++[ECO "B83"]+[Opening "Sicilian"]+[Variation "Scheveningen, 6.Be2"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 *++[ECO "B83"]+[Opening "Sicilian"]+[Variation "modern Scheveningen"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Nc6 *++[ECO "B83"]+[Opening "Sicilian"]+[Variation "modern Scheveningen, main line"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Nc6 7. O-O Be7 +8. Be3 O-O 9. f4 *++[ECO "B83"]+[Opening "Sicilian"]+[Variation "modern Scheveningen, main line with Nb3"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Nc6 7. O-O Be7 +8. Be3 O-O 9. f4 Bd7 10. Nb3 *++[ECO "B84"]+[Opening "Sicilian"]+[Variation "Scheveningen (Paulsen), classical variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 *++[ECO "B84"]+[Opening "Sicilian"]+[Variation "Scheveningen, classical, Nd7 system"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Nbd7 *++[ECO "B84"]+[Opening "Sicilian"]+[Variation "Scheveningen (Paulsen), classical variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Qc7 *++[ECO "B85"]+[Opening "Sicilian"]+[Variation "Scheveningen, classical variation with ...Qc7 and ...Nc6"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Qc7 8.+f4 Nc6 *++[ECO "B85"]+[Opening "Sicilian"]+[Variation "Scheveningen, classical, Maroczy system"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Qc7 8.+f4 Nc6 9. Kh1 Be7 10. a4 *++[ECO "B85"]+[Opening "Sicilian"]+[Variation "Scheveningen, classical"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Qc7 8.+f4 Nc6 9. Be3 *++[ECO "B85"]+[Opening "Sicilian"]+[Variation "Scheveningen, classical main line"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Qc7 8.+f4 Nc6 9. Be3 Be7 10. Qe1 O-O *++[ECO "B86"]+[Opening "Sicilian"]+[Variation "Sozin attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 *++[ECO "B87"]+[Opening "Sicilian"]+[Variation "Sozin with ...a6 and ...b5"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 a6 7. Bb3 b5 *++[ECO "B88"]+[Opening "Sicilian"]+[Variation "Sozin, Leonhardt variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Nc6 *++[ECO "B88"]+[Opening "Sicilian"]+[Variation "Sozin, Fischer variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Nc6 7. Bb3 Be7 +8. Be3 O-O 9. f4 *++[ECO "B89"]+[Opening "Sicilian"]+[Variation "Sozin, 7.Be3"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Nc6 7. Be3 *++[ECO "B89"]+[Opening "Sicilian"]+[Variation "Velimirovic attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Nc6 7. Be3 Be7 +8. Qe2 *++[ECO "B90"]+[Opening "Sicilian"]+[Variation "Najdorf"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 *++[ECO "B90"]+[Opening "Sicilian"]+[Variation "Najdorf, Adams attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 *++[ECO "B90"]+[Opening "Sicilian"]+[Variation "Najdorf, Lipnitzky attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 *++[ECO "B90"]+[Opening "Sicilian"]+[Variation "Najdorf, Byrne (English) attack"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 *++[ECO "B91"]+[Opening "Sicilian"]+[Variation "Najdorf, Zagreb (fianchetto) variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 *++[ECO "B92"]+[Opening "Sicilian"]+[Variation "Najdorf, Opovcensky variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 *++[ECO "B93"]+[Opening "Sicilian"]+[Variation "Najdorf, 6.f4"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 *++[ECO "B94"]+[Opening "Sicilian"]+[Variation "Najdorf, 6.Bg5"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 *++[ECO "B94"]+[Opening "Sicilian"]+[Variation "Najdorf, Ivkov variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Bc4 Qa5+8. Qd2 e6 9. O-O-O b5 10. Bb3 Bb7 11. Rhe1 Nc5 12. e5 *++[ECO "B95"]+[Opening "Sicilian"]+[Variation "Najdorf, 6...e6"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 *++[ECO "B96"]+[Opening "Sicilian"]+[Variation "Najdorf, 7.f4"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 *++[ECO "B96"]+[Opening "Sicilian"]+[Variation "Najdorf, Polugayevsky variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5 *++[ECO "B96"]+[Opening "Sicilian"]+[Variation "Najdorf, Polugayevsky, Simagin variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 b5 8. +e5 dxe5 9. fxe5 Qc7 10. Qe2 *++[ECO "B97"]+[Opening "Sicilian"]+[Variation "Najdorf, 7...Qb6"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 *++[ECO "B97"]+[Opening "Sicilian"]+[Variation "Najdorf, Poisoned pawn variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8.+Qd2 Qxb2 9. Rb1 Qa3 *++[ECO "B98"]+[Opening "Sicilian"]+[Variation "Najdorf, 7...Be7"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 *++[ECO "B98"]+[Opening "Sicilian"]+[Variation "Najdorf, Browne variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8.+Qf3 h6 9. Bh4 Qc7 *++[ECO "B98"]+[Opening "Sicilian"]+[Variation "Najdorf, Goteborg (Argentine) variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8.+Qf3 h6 9. Bh4 g5 *++[ECO "B98"]+[Opening "Sicilian"]+[Variation "Najdorf variation"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8.+Qf3 Qc7 *++[ECO "B99"]+[Opening "Sicilian"]+[Variation "Najdorf, 7...Be7 main line"]++1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8.+Qf3 Qc7 9. O-O-O Nbd7 *++[ECO "C00"]+[Opening "French defence"]++1. e4 e6 *++[ECO "C00"]+[Opening "French defence, Steiner variation"]++1. e4 e6 2. c4 *++[ECO "C00"]+[Opening "French"]+[Variation "Reti (Spielmann) variation"]++1. e4 e6 2. b3 *++[ECO "C00"]+[Opening "French"]+[Variation "Steinitz attack"]++1. e4 e6 2. e5 *++[ECO "C00"]+[Opening "French"]+[Variation "Labourdonnais variation"]++1. e4 e6 2. f4 *++[ECO "C00"]+[Opening "French defence"]++1. e4 e6 2. Nf3 *++[ECO "C00"]+[Opening "French"]+[Variation "Wing gambit"]++1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4 *++[ECO "C00"]+[Opening "French defence"]++1. e4 e6 2. Nc3 *++[ECO "C00"]+[Opening "French"]+[Variation "Pelikan variation"]++1. e4 e6 2. Nc3 d5 3. f4 *++[ECO "C00"]+[Opening "French"]+[Variation "Two knights variation"]++1. e4 e6 2. Nc3 d5 3. Nf3 *++[ECO "C00"]+[Opening "French"]+[Variation "Chigorin variation"]++1. e4 e6 2. Qe2 *++[ECO "C00"]+[Opening "French"]+[Variation "King's Indian attack"]++1. e4 e6 2. d3 *++[ECO "C00"]+[Opening "French"]+[Variation "Reversed Philidor formation"]++1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 Nc6 5. Be2 *++[ECO "C00"]+[Opening "French defence"]++1. e4 e6 2. d4 *++[ECO "C00"]+[Opening "Lengfellner system"]++1. e4 e6 2. d4 d6 *++[ECO "C00"]+[Opening "St. George defence"]++1. e4 e6 2. d4 a6 *++[ECO "C00"]+[Opening "French defence"]++1. e4 e6 2. d4 d5 *++[ECO "C00"]+[Opening "French"]+[Variation "Schlechter variation"]++1. e4 e6 2. d4 d5 3. Bd3 *++[ECO "C00"]+[Opening "French"]+[Variation "Alapin variation"]++1. e4 e6 2. d4 d5 3. Be3 *++[ECO "C01"]+[Opening "French"]+[Variation "exchange variation"]++1. e4 e6 2. d4 d5 3. exd5 *++[ECO "C01"]+[Opening "French"]+[Variation "exchange, Svenonius variation"]++1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Bg5 *++[ECO "C01"]+[Opening "French"]+[Variation "exchange, Bogolyubov variation"]++1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Bg5 Nc6 *++[ECO "C02"]+[Opening "French"]+[Variation "advance variation"]++1. e4 e6 2. d4 d5 3. e5 *++[ECO "C02"]+[Opening "French"]+[Variation "advance, Steinitz variation"]++1. e4 e6 2. d4 d5 3. e5 c5 4. dxc5 *++[ECO "C02"]+[Opening "French"]+[Variation "advance, Nimzovich variation"]++1. e4 e6 2. d4 d5 3. e5 c5 4. Qg4 *++[ECO "C02"]+[Opening "French"]+[Variation "advance, Nimzovich system"]++1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 *++[ECO "C02"]+[Opening "French"]+[Variation "advance variation"]++1. e4 e6 2. d4 d5 3. e5 c5 4. c3 *++[ECO "C02"]+[Opening "French"]+[Variation "advance, Wade variation"]++1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 *++[ECO "C02"]+[Opening "French"]+[Variation "advance variation"]++1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 *++[ECO "C02"]+[Opening "French"]+[Variation "advance, Paulsen attack"]++1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 *++[ECO "C02"]+[Opening "French"]+[Variation "advance, Milner-Barry gambit"]++1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 *++[ECO "C02"]+[Opening "French"]+[Variation "advance, Euwe variation"]++1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 *++[ECO "C03"]+[Opening "French"]+[Variation "Tarrasch"]++1. e4 e6 2. d4 d5 3. Nd2 *++[ECO "C03"]+[Opening "French"]+[Variation "Tarrasch, Haberditz variation"]++1. e4 e6 2. d4 d5 3. Nd2 f5 *++[ECO "C03"]+[Opening "French"]+[Variation "Tarrasch, Guimard variation"]++1. e4 e6 2. d4 d5 3. Nd2 Nc6 *++[ECO "C04"]+[Opening "French"]+[Variation "Tarrasch, Guimard main line"]++1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6 *++[ECO "C05"]+[Opening "French"]+[Variation "Tarrasch, closed variation"]++1. e4 e6 2. d4 d5 3. Nd2 Nf6 *++[ECO "C05"]+[Opening "French"]+[Variation "Tarrasch, Botvinnik variation"]++1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 b6 *++[ECO "C05"]+[Opening "French"]+[Variation "Tarrasch, closed variation"]++1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 *++[ECO "C06"]+[Opening "French"]+[Variation "Tarrasch, closed variation, main line"]++1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8.+cxd4 *++[ECO "C06"]+[Opening "French"]+[Variation "Tarrasch, Leningrad variation"]++1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8.+cxd4 Nb6 *++[ECO "C07"]+[Opening "French"]+[Variation "Tarrasch, open variation"]++1. e4 e6 2. d4 d5 3. Nd2 c5 *++[ECO "C07"]+[Opening "French"]+[Variation "Tarrasch, Eliskases variation"]++1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 cxd4 6. Bc4 Qd8 *++[ECO "C08"]+[Opening "French"]+[Variation "Tarrasch, open, 4.ed ed"]++1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 *++[ECO "C09"]+[Opening "French"]+[Variation "Tarrasch, open variation, main line"]++1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6 *++[ECO "C10"]+[Opening "French"]+[Variation "Paulsen variation"]++1. e4 e6 2. d4 d5 3. Nc3 *++[ECO "C10"]+[Opening "French"]+[Variation "Marshall variation"]++1. e4 e6 2. d4 d5 3. Nc3 c5 *++[ECO "C10"]+[Opening "French"]+[Variation "Rubinstein variation"]++1. e4 e6 2. d4 d5 3. Nc3 dxe4 *++[ECO "C10"]+[Opening "French"]+[Variation "Fort Knox variation"]++1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bd7 5. Nf3 Bc6 *++[ECO "C10"]+[Opening "French"]+[Variation "Rubinstein variation"]++1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 *++[ECO "C10"]+[Opening "French"]+[Variation "Rubinstein, Capablanca line"]++1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. Ne5+*++[ECO "C10"]+[Opening "French"]+[Variation "Frere (Becker) variation"]++1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Qd5 *++[ECO "C11"]+[Opening "French defence"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 *++[ECO "C11"]+[Opening "French"]+[Variation "Swiss variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bd3 *++[ECO "C11"]+[Opening "French"]+[Variation "Henneberger variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Be3 *++[ECO "C11"]+[Opening "French"]+[Variation "Steinitz variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 *++[ECO "C11"]+[Opening "French"]+[Variation "Steinitz, Bradford attack"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. dxc5 Bxc5 7. Qg4 *++[ECO "C11"]+[Opening "French"]+[Variation "Steinitz variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. dxc5 Nc6 *++[ECO "C11"]+[Opening "French"]+[Variation "Steinitz, Brodsky-Jones variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. dxc5 Nc6 7. a3 Bxc5 8.+Qg4 O-O 9. Nf3 f6 *++[ECO "C11"]+[Opening "French"]+[Variation "Steinitz variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 *++[ECO "C11"]+[Opening "French"]+[Variation "Steinitz, Boleslavsky variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 *++[ECO "C11"]+[Opening "French"]+[Variation "Steinitz, Gledhill attack"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Qg4 *++[ECO "C11"]+[Opening "French"]+[Variation "Burn variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 *++[ECO "C12"]+[Opening "French"]+[Variation "MacCutcheon variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 *++[ECO "C12"]+[Opening "French"]+[Variation "MacCutcheon, Bogolyubov variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. exd5 Qxd5 6. Bxf6 gxf6 7. Qd2 +Qa5 *++[ECO "C12"]+[Opening "French"]+[Variation "MacCutcheon, advance variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 *++[ECO "C12"]+[Opening "French"]+[Variation "MacCutcheon, Chigorin variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. exf6 *++[ECO "C12"]+[Opening "French"]+[Variation "MacCutcheon, Grigoriev variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. exf6 hxg5 7. fxg7 Rg8 +8. h4 gxh4 9. Qg4 *++[ECO "C12"]+[Opening "French"]+[Variation "MacCutcheon, Bernstein variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bh4 *++[ECO "C12"]+[Opening "French"]+[Variation "MacCutcheon, Janowski variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Be3 *++[ECO "C12"]+[Opening "French"]+[Variation "MacCutcheon, Dr. Olland (Dutch) variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bc1 *++[ECO "C12"]+[Opening "French"]+[Variation "MacCutcheon, Tartakower variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Nfd7 *++[ECO "C12"]+[Opening "French"]+[Variation "MacCutcheon, Lasker variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 *++[ECO "C12"]+[Opening "French"]+[Variation "MacCutcheon, Duras variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8.+Qg4 Kf8 9. Bc1 *++[ECO "C12"]+[Opening "French"]+[Variation "MacCutcheon, Lasker variation, 8...g6"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8.+Qg4 g6 *++[ECO "C13"]+[Opening "French"]+[Variation "classical"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 *++[ECO "C13"]+[Opening "French"]+[Variation "classical, Anderssen variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 *++[ECO "C13"]+[Opening "French"]+[Variation "classical, Anderssen-Richter variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 Bxf6 6. e5 Be7 7. Qg4 *++[ECO "C13"]+[Opening "French"]+[Variation "classical, Vistaneckis (Nimzovich) variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8 *++[ECO "C13"]+[Opening "French"]+[Variation "classical, Frankfurt variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ng8 6. Be3 b6 *++[ECO "C13"]+[Opening "French"]+[Variation "classical, Tartakower variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Ne4 *++[ECO "C13"]+[Opening "French"]+[Variation "Albin-Alekhine-Chatard attack"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 *++[ECO "C13"]+[Opening "French"]+[Variation "Albin-Alekhine-Chatard attack, Maroczy variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 a6 *++[ECO "C13"]+[Opening "French"]+[Variation "Albin-Alekhine-Chatard attack, Breyer variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 c5 *++[ECO "C13"]+[Opening "French"]+[Variation "Albin-Alekhine-Chatard attack, Teichmann variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 f6 *++[ECO "C13"]+[Opening "French"]+[Variation "Albin-Alekhine-Chatard attack, Spielmann variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 O-O *++[ECO "C14"]+[Opening "French"]+[Variation "classical variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 *++[ECO "C14"]+[Opening "French"]+[Variation "classical, Tarrasch variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Bd3 *++[ECO "C14"]+[Opening "French"]+[Variation "classical, Rubinstein variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Qd2 *++[ECO "C14"]+[Opening "French"]+[Variation "classical, Alapin variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Nb5 *++[ECO "C14"]+[Opening "French"]+[Variation "classical, Pollock variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Qg4 *++[ECO "C14"]+[Opening "French"]+[Variation "classical, Steinitz variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 *++[ECO "C14"]+[Opening "French"]+[Variation "classical, Stahlberg variation"]++1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 O-O +8. Nf3 c5 9. Qd2 Nc6 10. O-O-O c4 *++[ECO "C15"]+[Opening "French"]+[Variation "Winawer (Nimzovich) variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 *++[ECO "C15"]+[Opening "French"]+[Variation "Winawer, Kondratiyev variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd3 c5 5. exd5 Qxd5 6. Bd2 *++[ECO "C15"]+[Opening "French"]+[Variation "Winawer, fingerslip variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd2 *++[ECO "C15"]+[Opening "French"]+[Variation "Winawer, Alekhine (Maroczy) gambit"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Ne2 *++[ECO "C15"]+[Opening "French"]+[Variation "Winawer, Alekhine gambit, Alatortsev variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Ne2 dxe4 5. a3 Be7 6. Nxe4 Nf6 7. N2g3 O-O+8. Be2 Nc6 *++[ECO "C15"]+[Opening "French"]+[Variation "Winawer, Alekhine gambit"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Ne2 dxe4 5. a3 Bxc3+ *++[ECO "C15"]+[Opening "French"]+[Variation "Winawer, Alekhine gambit, Kan variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Ne2 dxe4 5. a3 Bxc3+ 6. Nxc3 Nc6 *++[ECO "C16"]+[Opening "French"]+[Variation "Winawer, advance variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 *++[ECO "C16"]+[Opening "French"]+[Variation "Winawer, Petrosian variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Qd7 *++[ECO "C17"]+[Opening "French"]+[Variation "Winawer, advance variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 *++[ECO "C17"]+[Opening "French"]+[Variation "Winawer, advance, Bogolyubov variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Bd2 *++[ECO "C17"]+[Opening "French"]+[Variation "Winawer, advance, Russian variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Qg4 *++[ECO "C17"]+[Opening "French"]+[Variation "Winawer, advance, 5.a3"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 *++[ECO "C17"]+[Opening "French"]+[Variation "Winawer, advance, Rauzer variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 cxd4 6. axb4 dxc3 7. Nf3 *++[ECO "C18"]+[Opening "French"]+[Variation "Winawer, advance variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 *++[ECO "C18"]+[Opening "French"]+[Variation "Winawer, classical variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7 *++[ECO "C19"]+[Opening "French"]+[Variation "Winawer, advance, 6...Ne7"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 *++[ECO "C19"]+[Opening "French"]+[Variation "Winawer, advance, Smyslov variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. a4 *++[ECO "C19"]+[Opening "French"]+[Variation "Winawer, advance, positional main line"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3 *++[ECO "C19"]+[Opening "French"]+[Variation "Winawer, advance, poisoned pawn variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 *++[ECO "C19"]+[Opening "French"]+[Variation "Winawer, advance, poisoned pawn, Euwe-Gligoric variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7 8.+Qxg7 Rg8 9. Qxh7 cxd4 10. Kd1 *++[ECO "C19"]+[Opening "French"]+[Variation "Winawer, advance, poisoned pawn, Konstantinopolsky variation"]++1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7 8.+Qxg7 Rg8 9. Qxh7 cxd4 10. Ne2 *++[ECO "C20"]+[Opening "King's pawn game"]++1. e4 e5 *++[ECO "C20"]+[Opening "KP"]+[Variation "Indian opening"]++1. e4 e5 2. d3 *++[ECO "C20"]+[Opening "KP"]+[Variation "Mengarini's opening"]++1. e4 e5 2. a3 *++[ECO "C20"]+[Opening "KP"]+[Variation "King's head opening"]++1. e4 e5 2. f3 *++[ECO "C20"]+[Opening "KP"]+[Variation "Patzer opening"]++1. e4 e5 2. Qh5 *++[ECO "C20"]+[Opening "KP"]+[Variation "Napoleon's opening"]++1. e4 e5 2. Qf3 *++[ECO "C20"]+[Opening "KP"]+[Variation "Lopez opening"]++1. e4 e5 2. c3 *++[ECO "C20"]+[Opening "Alapin's opening"]++1. e4 e5 2. Ne2 *++[ECO "C21"]+[Opening "Centre game"]++1. e4 e5 2. d4 exd4 *++[ECO "C21"]+[Opening "Centre game, Kieseritsky variation"]++1. e4 e5 2. d4 exd4 3. Nf3 c5 4. Bc4 b5 *++[ECO "C21"]+[Opening "Halasz gambit"]++1. e4 e5 2. d4 exd4 3. f4 *++[ECO "C21"]+[Opening "Danish gambit"]++1. e4 e5 2. d4 exd4 3. c3 *++[ECO "C21"]+[Opening "Danish gambit"]+[Variation "Collijn defence"]++1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 Qe7 *++[ECO "C21"]+[Opening "Danish gambit"]+[Variation "Schlechter defence"]++1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 d5 *++[ECO "C21"]+[Opening "Danish gambit"]+[Variation "Soerensen defence"]++1. e4 e5 2. d4 exd4 3. c3 d5 *++[ECO "C21"]+[Opening "Centre game"]++1. e4 e5 2. d4 exd4 3. Qxd4 *++[ECO "C22"]+[Opening "Centre game"]++1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 *++[ECO "C22"]+[Opening "Centre game"]+[Variation "Paulsen attack"]++1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 *++[ECO "C22"]+[Opening "Centre game"]+[Variation "Charousek variation"]++1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Bb4+ 5. c3 Be7 *++[ECO "C22"]+[Opening "Centre game"]+[Variation "l'Hermet variation"]++1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 f5 *++[ECO "C22"]+[Opening "Centre game"]+[Variation "Berger variation"]++1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6 *++[ECO "C22"]+[Opening "Centre game"]+[Variation "Kupreichik variation"]++1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6 5. Nc3 Bb4 6. Bd2 O-O 7. O-O-O +Re8 8. Bc4 d6 9. Nh3 *++[ECO "C22"]+[Opening "Centre game"]+[Variation "Hall variation"]++1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qc4 *++[ECO "C23"]+[Opening "Bishop's opening"]++1. e4 e5 2. Bc4 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "Philidor counter-attack"]++1. e4 e5 2. Bc4 c6 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "Lisitsyn variation"]++1. e4 e5 2. Bc4 c6 3. d4 d5 4. exd5 cxd5 5. Bb5+ Bd7 6. Bxd7+ Nxd7 7. dxe5+Nxe5 8. Ne2 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "Calabrese counter-gambit"]++1. e4 e5 2. Bc4 f5 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "Calabrese counter-gambit, Jaenisch variation"]++1. e4 e5 2. Bc4 f5 3. d3 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "Classical variation"]++1. e4 e5 2. Bc4 Bc5 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "Lopez gambit"]++1. e4 e5 2. Bc4 Bc5 3. Qe2 Nc6 4. c3 Nf6 5. f4 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "Philidor variation"]++1. e4 e5 2. Bc4 Bc5 3. c3 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "Pratt variation"]++1. e4 e5 2. Bc4 Bc5 3. c3 Nf6 4. d4 exd4 5. e5 d5 6. exf6 dxc4 7. Qh5 O-O *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "Lewis counter-gambit"]++1. e4 e5 2. Bc4 Bc5 3. c3 d5 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "del Rio variation"]++1. e4 e5 2. Bc4 Bc5 3. c3 Qg5 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "Lewis gambit"]++1. e4 e5 2. Bc4 Bc5 3. d4 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "Wing gambit"]++1. e4 e5 2. Bc4 Bc5 3. b4 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "MacDonnell double gambit"]++1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4 *++[ECO "C23"]+[Opening "Bishop's opening"]+[Variation "Four pawns' gambit"]++1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4 exf4 5. Nf3 Be7 6. d4 Bh4+ 7. g3 fxg3+8. O-O gxh2+ 9. Kh1 *++[ECO "C24"]+[Opening "Bishop's opening"]+[Variation "Berlin defence"]++1. e4 e5 2. Bc4 Nf6 *++[ECO "C24"]+[Opening "Bishop's opening"]+[Variation "Greco gambit"]++1. e4 e5 2. Bc4 Nf6 3. f4 *++[ECO "C24"]+[Opening "Bishop's opening"]+[Variation "Ponziani gambit"]++1. e4 e5 2. Bc4 Nf6 3. d4 *++[ECO "C24"]+[Opening "Bishop's opening"]+[Variation "Urusov gambit"]++1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 *++[ECO "C24"]+[Opening "Bishop's opening"]+[Variation "Urusov gambit, Panov variation"]++1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 d5 5. exd5 Bb4+ 6. c3 Qe7+ *++[ECO "C25"]+[Opening "Vienna game"]++1. e4 e5 2. Nc3 *++[ECO "C25"]+[Opening "Vienna"]+[Variation "Zhuravlev countergambit"]++1. e4 e5 2. Nc3 Bb4 3. Qg4 Nf6 *++[ECO "C25"]+[Opening "Vienna game, Max Lange defence"]++1. e4 e5 2. Nc3 Nc6 *++[ECO "C25"]+[Opening "Vienna"]+[Variation "Paulsen variation"]++1. e4 e5 2. Nc3 Nc6 3. g3 *++[ECO "C25"]+[Opening "Vienna"]+[Variation "Fyfe gambit"]++1. e4 e5 2. Nc3 Nc6 3. d4 *++[ECO "C25"]+[Opening "Vienna gambit"]++1. e4 e5 2. Nc3 Nc6 3. f4 *++[ECO "C25"]+[Opening "Vienna"]+[Variation "Steinitz gambit"]++1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 *++[ECO "C25"]+[Opening "Vienna"]+[Variation "Steinitz gambit, Zukertort defence"]++1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2 d5 *++[ECO "C25"]+[Opening "Vienna"]+[Variation "Steinitz gambit, Fraser-Minckwitz variation"]++1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2 b6 *++[ECO "C25"]+[Opening "Vienna gambit"]++1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 *++[ECO "C25"]+[Opening "Vienna"]+[Variation "Hamppe-Allgaier gambit"]++1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. h4 g4 6. Ng5 *++[ECO "C25"]+[Opening "Vienna"]+[Variation "Hamppe-Allgaier gambit, Alapin variation"]++1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. h4 g4 6. Ng5 d6 *++[ECO "C25"]+[Opening "Vienna"]+[Variation "Hamppe-Muzio gambit"]++1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. Bc4 g4 6. O-O *++[ECO "C25"]+[Opening "Vienna"]+[Variation "Hamppe-Muzio, Dubois variation"]++1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. Bc4 g4 6. O-O gxf3 7. Qxf3 Ne5+8. Qxf4 Qf6 *++[ECO "C25"]+[Opening "Vienna"]+[Variation "Pierce gambit"]++1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. d4 *++[ECO "C25"]+[Opening "Vienna"]+[Variation "Pierce gambit, Rushmere attack"]++1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. d4 g4 6. Bc4 gxf3 7. O-O d5 8.+exd5 Bg4 9. dxc6 *++[ECO "C26"]+[Opening "Vienna"]+[Variation "Falkbeer variation"]++1. e4 e5 2. Nc3 Nf6 *++[ECO "C26"]+[Opening "Vienna"]+[Variation "Mengarini variation"]++1. e4 e5 2. Nc3 Nf6 3. a3 *++[ECO "C26"]+[Opening "Vienna"]+[Variation "Paulsen-Mieses variation"]++1. e4 e5 2. Nc3 Nf6 3. g3 *++[ECO "C26"]+[Opening "Vienna game"]++1. e4 e5 2. Nc3 Nf6 3. Bc4 *++[ECO "C27"]+[Opening "Vienna game"]++1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 *++[ECO "C27"]+[Opening "Vienna"]+[Variation "`Frankenstein-Dracula' variation"]++1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. Nb5 g6 7. Qf3 f5 +8. Qd5 Qe7 9. Nxc7+ Kd8 10. Nxa8 b6 *++[ECO "C27"]+[Opening "Vienna"]+[Variation "Adams' gambit"]++1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. d4 *++[ECO "C27"]+[Opening "Vienna game"]++1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Be7 *++[ECO "C27"]+[Opening "Vienna"]+[Variation "Alekhine variation"]++1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Be7 6. Nf3 Nc6 7. Nxe5 *++[ECO "C27"]+[Opening "Boden-Kieseritsky gambit"]++1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Nf3 *++[ECO "C27"]+[Opening "Boden-Kieseritsky gambit"]+[Variation "Lichtenhein defence"]++1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Nf3 d5 *++[ECO "C28"]+[Opening "Vienna game"]++1. e4 e5 2. Nc3 Nf6 3. Bc4 Nc6 *++[ECO "C29"]+[Opening "Vienna gambit"]++1. e4 e5 2. Nc3 Nf6 3. f4 d5 *++[ECO "C29"]+[Opening "Vienna gambit"]+[Variation "Kaufmann variation"]++1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Nf3 Bg4 6. Qe2 *++[ECO "C29"]+[Opening "Vienna gambit"]+[Variation "Breyer variation"]++1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Nf3 Be7 *++[ECO "C29"]+[Opening "Vienna gambit"]+[Variation "Paulsen attack"]++1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3 *++[ECO "C29"]+[Opening "Vienna gambit"]+[Variation "Bardeleben variation"]++1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3 f5 *++[ECO "C29"]+[Opening "Vienna gambit"]+[Variation "Heyde variation"]++1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3 f5 6. d4 *++[ECO "C29"]+[Opening "Vienna gambit"]++1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. d3 *++[ECO "C29"]+[Opening "Vienna gambit, Wurzburger trap"]++1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. d3 Qh4+ 6. g3 Nxg3 7. Nf3 Qh5+8. Nxd5 *++[ECO "C29"]+[Opening "Vienna gambit, Steinitz variation"]++1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. d3 *++[ECO "C30"]+[Opening "King's gambit"]++1. e4 e5 2. f4 *++[ECO "C30"]+[Opening "KGD"]+[Variation "Keene's defence"]++1. e4 e5 2. f4 Qh4+ 3. g3 Qe7 *++[ECO "C30"]+[Opening "KGD"]+[Variation "Mafia defence"]++1. e4 e5 2. f4 c5 *++[ECO "C30"]+[Opening "KGD"]+[Variation "Norwalde variation"]++1. e4 e5 2. f4 Qf6 *++[ECO "C30"]+[Opening "KGD"]+[Variation "Norwalde variation, Buecker gambit"]++1. e4 e5 2. f4 Qf6 3. Nf3 Qxf4 4. Nc3 Bb4 5. Bc4 *++[ECO "C30"]+[Opening "KGD"]+[Variation "classical variation"]++1. e4 e5 2. f4 Bc5 *++[ECO "C30"]+[Opening "KGD"]+[Variation "classical, Svenonius variation"]++1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. Nc3 Nf6 5. Bc4 Nc6 6. d3 Bg4 7. h3 Bxf3 8.+Qxf3 exf4 *++[ECO "C30"]+[Opening "KGD"]+[Variation "classical, Hanham variation"]++1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. Nc3 Nd7 *++[ECO "C30"]+[Opening "KGD"]+[Variation "classical, 4.c3"]++1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 *++[ECO "C30"]+[Opening "KGD"]+[Variation "classical, Marshall attack"]++1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 Bg4 5. fxe5 dxe5 6. Qa4+ *++[ECO "C30"]+[Opening "KGD"]+[Variation "classical counter-gambit"]++1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5 *++[ECO "C30"]+[Opening "KGD"]+[Variation "classical, Reti variation"]++1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5 5. fxe5 dxe5 6. d4 exd4 7. Bc4 *++[ECO "C30"]+[Opening "KGD"]+[Variation "classical, Soldatenkov variation"]++1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. fxe5 *++[ECO "C30"]+[Opening "KGD"]+[Variation "classical, Heath variation"]++1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. b4 *++[ECO "C30"]+[Opening "KGD"]+[Variation "2...Nf6"]++1. e4 e5 2. f4 Nf6 *++[ECO "C31"]+[Opening "KGD"]+[Variation "Falkbeer counter-gambit"]++1. e4 e5 2. f4 d5 *++[ECO "C31"]+[Opening "KGD"]+[Variation "Falkbeer, Tartakower variation"]++1. e4 e5 2. f4 d5 3. Nf3 *++[ECO "C31"]+[Opening "KGD"]+[Variation "Falkbeer, Milner-Barry variation"]++1. e4 e5 2. f4 d5 3. Nc3 *++[ECO "C31"]+[Opening "KGD"]+[Variation "Falkbeer counter-gambit"]++1. e4 e5 2. f4 d5 3. exd5 *++[ECO "C31"]+[Opening "KGD"]+[Variation "Nimzovich counter-gambit"]++1. e4 e5 2. f4 d5 3. exd5 c6 *++[ECO "C31"]+[Opening "KGD"]+[Variation "Falkbeer, 3...e4"]++1. e4 e5 2. f4 d5 3. exd5 e4 *++[ECO "C31"]+[Opening "KGD"]+[Variation "Falkbeer, Rubinstein variation"]++1. e4 e5 2. f4 d5 3. exd5 e4 4. Nc3 Nf6 5. Qe2 *++[ECO "C31"]+[Opening "KGD"]+[Variation "Falkbeer, Nimzovich variation"]++1. e4 e5 2. f4 d5 3. exd5 e4 4. Bb5+ *++[ECO "C31"]+[Opening "KGD"]+[Variation "Falkbeer, 4.d3"]++1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 *++[ECO "C31"]+[Opening "KGD"]+[Variation "Falkbeer, Morphy gambit"]++1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Nc3 Bb4 6. Bd2 e3 *++[ECO "C32"]+[Opening "KGD"]+[Variation "Falkbeer, 5.de"]++1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 *++[ECO "C32"]+[Opening "KGD"]+[Variation "Falkbeer, Alapin variation"]++1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf2++8. Kd1 Qxd5+ 9. Nfd2 *++[ECO "C32"]+[Opening "KGD"]+[Variation "Falkbeer, main line, 7...Bf5"]++1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf5 *++[ECO "C32"]+[Opening "KGD"]+[Variation "Falkbeer, Tarrasch variation"]++1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf5 +8. g4 O-O *++[ECO "C32"]+[Opening "KGD"]+[Variation "Falkbeer, Charousek gambit"]++1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Qe2 *++[ECO "C32"]+[Opening "KGD"]+[Variation "Falkbeer, Charousek variation"]++1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Qe2 Qxd5 7. Nd2 f5 +8. g4 *++[ECO "C32"]+[Opening "KGD"]+[Variation "Falkbeer, Keres variation"]++1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Nd2 *++[ECO "C32"]+[Opening "KGD"]+[Variation "Falkbeer, Reti variation"]++1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Qe2 *++[ECO "C33"]+[Opening "King's gambit accepted"]++1. e4 e5 2. f4 exf4 *++[ECO "C33"]+[Opening "KGA"]+[Variation "Tumbleweed gambit"]++1. e4 e5 2. f4 exf4 3. Kf2 *++[ECO "C33"]+[Opening "KGA"]+[Variation "Orsini gambit"]++1. e4 e5 2. f4 exf4 3. b3 *++[ECO "C33"]+[Opening "KGA"]+[Variation "Pawn's gambit (Stamma gambit)"]++1. e4 e5 2. f4 exf4 3. h4 *++[ECO "C33"]+[Opening "KGA"]+[Variation "Schurig gambit"]++1. e4 e5 2. f4 exf4 3. Bd3 *++[ECO "C33"]+[Opening "KGA"]+[Variation "Carrera (Basman) gambit"]++1. e4 e5 2. f4 exf4 3. Qe2 *++[ECO "C33"]+[Opening "KGA"]+[Variation "Villemson (Steinitz) gambit"]++1. e4 e5 2. f4 exf4 3. d4 *++[ECO "C33"]+[Opening "KGA"]+[Variation "Keres (Mason-Steinitz) gambit"]++1. e4 e5 2. f4 exf4 3. Nc3 *++[ECO "C33"]+[Opening "KGA"]+[Variation "Breyer gambit"]++1. e4 e5 2. f4 exf4 3. Qf3 *++[ECO "C33"]+[Opening "KGA"]+[Variation "Lesser bishop's (Petroff-Jaenisch-Tartakower) gambit"]++1. e4 e5 2. f4 exf4 3. Be2 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit"]++1. e4 e5 2. f4 exf4 3. Bc4 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Chigorin's attack"]++1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 d5 5. Bxd5 g5 6. g3 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Greco variation"]++1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Bc5 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, classical defence"]++1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Grimm attack"]++1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. d4 d6 7. e5 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, classical defence"]++1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. d4 Ne7 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, McDonnell attack"]++1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. d4 Ne7 7. g3 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, McDonnell attack"]++1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. g3 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Fraser variation"]++1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. g3 fxg3 7. Qf3 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, classical defence, Cozio attack"]++1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Qf3 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Boden defence"]++1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Nc6 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Bryan counter-gambit"]++1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 b5 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Bryan counter-gambit"]++1. e4 e5 2. f4 exf4 3. Bc4 b5 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Steinitz defence"]++1. e4 e5 2. f4 exf4 3. Bc4 Ne7 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Maurian defence"]++1. e4 e5 2. f4 exf4 3. Bc4 Nc6 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Ruy Lopez defence"]++1. e4 e5 2. f4 exf4 3. Bc4 c6 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Lopez-Gianutio counter-gambit"]++1. e4 e5 2. f4 exf4 3. Bc4 f5 *++[ECO "C33"]+[Opening "KGA"]+[Variation "Lopez-Gianutio counter-gambit, Hein variation"]++1. e4 e5 2. f4 exf4 3. Bc4 f5 4. Qe2 Qh4+ 5. Kd1 fxe4 6. Nc3 Kd8 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Bledow variation"]++1. e4 e5 2. f4 exf4 3. Bc4 d5 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Gifford variation"]++1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 Qh4+ 5. Kf1 g5 6. g3 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Boren-Svenonius variation"]++1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 Qh4+ 5. Kf1 Bd6 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Anderssen variation"]++1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 c6 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Morphy variation"]++1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 Nf6 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Cozio (Morphy) defence"]++1. e4 e5 2. f4 exf4 3. Bc4 Nf6 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Bogolyubov variation"]++1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Paulsen attack"]++1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3 Bb4 5. e5 *++[ECO "C33"]+[Opening "KGA"]+[Variation "bishop's gambit, Jaenisch variation"]++1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3 c6 *++[ECO "C34"]+[Opening "King's knight's gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 *++[ECO "C34"]+[Opening "KGA"]+[Variation "Bonsch-Osmolovsky variation"]++1. e4 e5 2. f4 exf4 3. Nf3 Ne7 *++[ECO "C34"]+[Opening "KGA"]+[Variation "Gianutio counter-gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 f5 *++[ECO "C34"]+[Opening "KGA"]+[Variation "Fischer defence"]++1. e4 e5 2. f4 exf4 3. Nf3 d6 *++[ECO "C34"]+[Opening "KGA"]+[Variation "Becker defence"]++1. e4 e5 2. f4 exf4 3. Nf3 h6 *++[ECO "C34"]+[Opening "KGA"]+[Variation "Schallop defence"]++1. e4 e5 2. f4 exf4 3. Nf3 Nf6 *++[ECO "C35"]+[Opening "KGA"]+[Variation "Cunningham defence"]++1. e4 e5 2. f4 exf4 3. Nf3 Be7 *++[ECO "C35"]+[Opening "KGA"]+[Variation "Cunningham, Bertin gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Bh4+ 5. g3 *++[ECO "C35"]+[Opening "KGA"]+[Variation "Cunningham, three pawns gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Bh4+ 5. g3 fxg3 6. O-O gxh2+ 7. Kh1 *++[ECO "C35"]+[Opening "KGA"]+[Variation "Cunningham, Euwe defence"]++1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Nf6 *++[ECO "C36"]+[Opening "KGA"]+[Variation "Abbazia defence (classical defence, modern defence[!])"]++1. e4 e5 2. f4 exf4 3. Nf3 d5 *++[ECO "C36"]+[Opening "KGA"]+[Variation "Abbazia defence, modern variation"]++1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Nf6 *++[ECO "C36"]+[Opening "KGA"]+[Variation "Abbazia defence, Botvinnik variation"]++1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Nf6 5. Bb5+ c6 6. dxc6 bxc6 7. Bc4 +Nd5 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Quaade gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Nc3 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Rosentreter gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Soerensen gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4 g4 5. Ne5 *++[ECO "C37"]+[Opening "KGA"]+[Variation "King's knight's gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Blachly gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Nc6 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Lolli gambit (wild Muzio gambit)"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Bxf7+ *++[ECO "C37"]+[Opening "KGA"]+[Variation "Lolli gambit, Young variation"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Bxf7+ Kxf7 6. O-O gxf3 7. Qxf3 +Qf6 8. d4 Qxd4+ 9. Be3 Qf6 10. Nc3 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Ghulam Kassim gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. d4 *++[ECO "C37"]+[Opening "KGA"]+[Variation "MacDonnell gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Nc3 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Salvio gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Silberschmidt gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nh6 7. d4 f3 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Salvio gambit, Anderssen counter-attack"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nh6 7. d4 d6 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Cochrane gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 f3 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Herzfeld gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nc6 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Muzio gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O *++[ECO "C37"]+[Opening "KGA"]+[Variation "Muzio gambit, Paulsen variation"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. e5 Qxe5+8. d3 Bh6 9. Nc3 Ne7 10. Bd2 Nbc6 11. Rae1 *++[ECO "C37"]+[Opening "KGA"]+[Variation "double Muzio gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. e5 Qxe5+8. Bxf7+ *++[ECO "C37"]+[Opening "KGA"]+[Variation "Muzio gambit, From defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qe7 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Muzio gambit, Holloway defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Nc6 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Muzio gambit, Kling and Horwitz counter-attack"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O Qe7 *++[ECO "C37"]+[Opening "KGA"]+[Variation "Muzio gambit, Brentano defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O d5 *++[ECO "C38"]+[Opening "King's knight's gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 *++[ECO "C38"]+[Opening "KGA"]+[Variation "Hanstein gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. O-O *++[ECO "C38"]+[Opening "KGA"]+[Variation "Philidor gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. h4 *++[ECO "C38"]+[Opening "KGA"]+[Variation "Greco gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. h4 h6 6. d4 d6 7. Nc3 c6 8. +hxg5 hxg5 9. Rxh8 Bxh8 10. Ne5 *++[ECO "C38"]+[Opening "KGA"]+[Variation "Philidor gambit, Schultz variation"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. h4 h6 6. d4 d6 7. Qd3 *++[ECO "C39"]+[Opening "King's knight's gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Allgaier gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Allgaier, Horny defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Qxg4 Nf6 +8. Qxf4 Bd6 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Allgaier, Thorold variation"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. d4 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Allgaier, Cook variation"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. d4 d5 8. +Bxf4 dxe4 9. Bc4+ Kg7 10. Be5+ *++[ECO "C39"]+[Opening "KGA"]+[Variation "Allgaier, Blackburne gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Nc3 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Allgaier, Walker attack"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Bc4+ *++[ECO "C39"]+[Opening "KGA"]+[Variation "Allgaier, Urusov attack"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Bc4+ d5 8.+Bxd5+ Kg7 9. d4 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Allgaier, Schlechter defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 Nf6 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Paulsen defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Bg7 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, long whip (Stockwhip, classical) defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 h5 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, long whip defence, Jaenisch variation"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 h5 6. Bc4 Rh7 7. d4 Bh6 8. +Nc3 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Brentano (Campbell) defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Brentano defence, Kaplanek variation"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5 6. d4 Nf6 7. exd5 Qxd5 8.+Nc3 Bb4 9. Kf2 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Brentano defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5 6. d4 Nf6 7. Bxf4 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Brentano defence, Caro variation"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5 6. d4 Nf6 7. Bxf4 Nxe4 8.+Nd2 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Salvio (Rosenthal) defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Qe7 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Salvio defence, Cozio variation"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Qe7 6. d4 f5 7. Bc4 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Polerio defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Be7 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Neumann defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nc6 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Kolisch defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d6 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Berlin defence"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Berlin defence, Riviere variation"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Nxg4 d5 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Berlin defence, 6.Bc4"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 *++[ECO "C39"]+[Opening "KGA"]+[Variation "Kieseritsky, Rice gambit"]++1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bd6 8.+O-O *++[ECO "C40"]+[Opening "King's knight opening"]++1. e4 e5 2. Nf3 *++[ECO "C40"]+[Opening "Gunderam defence"]++1. e4 e5 2. Nf3 Qe7 *++[ECO "C40"]+[Opening "Greco defence"]++1. e4 e5 2. Nf3 Qf6 *++[ECO "C40"]+[Opening "Damiano's defence"]++1. e4 e5 2. Nf3 f6 *++[ECO "C40"]+[Opening "QP counter-gambit (elephant gambit)"]++1. e4 e5 2. Nf3 d5 *++[ECO "C40"]+[Opening "QP counter-gambit"]+[Variation "Maroczy gambit"]++1. e4 e5 2. Nf3 d5 3. exd5 Bd6 *++[ECO "C40"]+[Opening "Latvian counter-gambit"]++1. e4 e5 2. Nf3 f5 *++[ECO "C40"]+[Opening "Latvian"]+[Variation "Nimzovich variation"]++1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Ne3 *++[ECO "C40"]+[Opening "Latvian"]+[Variation "Fraser defence"]++1. e4 e5 2. Nf3 f5 3. Nxe5 Nc6 *++[ECO "C40"]+[Opening "Latvian gambit, 3.Bc4"]++1. e4 e5 2. Nf3 f5 3. Bc4 *++[ECO "C40"]+[Opening "Latvian"]+[Variation "Behting variation"]++1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Qg5 5. Nf7 Qxg2 6. Rf1 d5 7. Nxh8 +Nf6 *++[ECO "C40"]+[Opening "Latvian"]+[Variation "Polerio variation"]++1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 d5 *++[ECO "C40"]+[Opening "Latvian"]+[Variation "corkscrew counter-gambit"]++1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Nf6 *++[ECO "C41"]+[Opening "Philidor's defence"]++1. e4 e5 2. Nf3 d6 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Steinitz variation"]++1. e4 e5 2. Nf3 d6 3. Bc4 Be7 4. c3 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Lopez counter-gambit"]++1. e4 e5 2. Nf3 d6 3. Bc4 f5 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Lopez counter-gambit, Jaenisch variation"]++1. e4 e5 2. Nf3 d6 3. Bc4 f5 4. d4 exd4 5. Ng5 Nh6 6. Nxh7 *++[ECO "C41"]+[Opening "Philidor's defence"]++1. e4 e5 2. Nf3 d6 3. d4 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Philidor counter-gambit"]++1. e4 e5 2. Nf3 d6 3. d4 f5 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Philidor counter-gambit, del Rio attack"]++1. e4 e5 2. Nf3 d6 3. d4 f5 4. dxe5 fxe4 5. Ng5 d5 6. e6 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Philidor counter-gambit, Berger variation"]++1. e4 e5 2. Nf3 d6 3. d4 f5 4. dxe5 fxe4 5. Ng5 d5 6. e6 Bc5 7. Nc3 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Philidor counter-gambit, Zukertort variation"]++1. e4 e5 2. Nf3 d6 3. d4 f5 4. Nc3 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "exchange variation"]++1. e4 e5 2. Nf3 d6 3. d4 exd4 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Boden variation"]++1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Qxd4 Bd7 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "exchange variation"]++1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Paulsen attack"]++1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 d5 5. exd5 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "exchange variation"]++1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Berger variation"]++1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. Be2 O-O 7. O-O c5 +8. Nf3 Nc6 9. Bg5 Be6 10. Re1 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Larsen variation"]++1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 g6 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Nimzovich (Jaenisch) variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nf6 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Improved Hanham variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Nimzovich, Sozin variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. O-O O-O 7. Qe2 c6 8.+a4 exd4 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Nimzovich, Larobok variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. Ng5 O-O 7. Bxf7+ *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Nimzovich variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Nimzovich, Sokolsky variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5 Nxe4 5. Nbd2 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Nimzovich, Rellstab variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5 Nxe4 5. Qd5 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Nimzovich, Locock variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Ng5 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Nimzovich, Klein variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Bc4 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Hanham variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nd7 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Hanham, Krause variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. O-O *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Hanham, Steiner variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. O-O Be7 6. dxe5 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Hanham, Kmoch variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. Ng5 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Hanham, Berger variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. Ng5 Nh6 6. f4 Be7 7. O-O O-O 8. +c3 d5 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Hanham, Schlechter variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. Nc3 *++[ECO "C41"]+[Opening "Philidor"]+[Variation "Hanham, Delmar variation"]++1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. c3 *++[ECO "C42"]+[Opening "Petrov's defence"]++1. e4 e5 2. Nf3 Nf6 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "French attack"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d3 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "Kaufmann attack"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. c4 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "Nimzovich attack"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "Cozio (Lasker) attack"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "classical attack"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "classical attack, Chigorin variation"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 +8. Re1 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "classical attack, Berger variation"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 +8. Re1 Bg4 9. c3 f5 10. Nbd2 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "classical attack, Krause variation"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 +8. Re1 Bg4 9. c3 f5 10. c4 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "classical attack, Maroczy variation"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 +8. Re1 Bg4 9. c3 f5 10. c4 Bh4 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "classical attack, Jaenisch variation"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 +8. c4 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "classical attack, Mason variation"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O O-O *++[ECO "C42"]+[Opening "Petrov"]+[Variation "classical attack, Marshall variation"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "classical attack, Tarrasch variation"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O +8. c4 Bg4 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "classical attack, Marshall trap"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O +8. c4 Bg4 9. cxd5 f5 10. Re1 Bxh2+ *++[ECO "C42"]+[Opening "Petrov"]+[Variation "classical attack, close variation"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 Nf6 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "Cochrane gambit"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "Paulsen attack"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nc4 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "Damiano variation"]++1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4 *++[ECO "C42"]+[Opening "Petrov three knights game"]++1. e4 e5 2. Nf3 Nf6 3. Nc3 *++[ECO "C42"]+[Opening "Petrov"]+[Variation "Italian variation"]++1. e4 e5 2. Nf3 Nf6 3. Bc4 *++[ECO "C43"]+[Opening "Petrov"]+[Variation "modern (Steinitz) attack"]++1. e4 e5 2. Nf3 Nf6 3. d4 *++[ECO "C43"]+[Opening "Petrov"]+[Variation "modern attack, main line"]++1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qxd4 *++[ECO "C43"]+[Opening "Petrov"]+[Variation "modern attack, Steinitz variation"]++1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2 *++[ECO "C43"]+[Opening "Petrov"]+[Variation "modern attack, Bardeleben variation"]++1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2 Nc5 6. Nxd4 Nc6 *++[ECO "C43"]+[Opening "Petrov"]+[Variation "Urusov gambit"]++1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. Bc4 *++[ECO "C43"]+[Opening "Petrov"]+[Variation "modern attack, Symmetrical variation"]++1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 *++[ECO "C43"]+[Opening "Petrov"]+[Variation "modern attack, Trifunovic variation"]++1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. Nxe5 Bd6 6. O-O O-O 7. c4 Bxe5+*++[ECO "C44"]+[Opening "King's pawn game"]++1. e4 e5 2. Nf3 Nc6 *++[ECO "C44"]+[Opening "Irish (Chicago) gambit"]++1. e4 e5 2. Nf3 Nc6 3. Nxe5 Nxe5 4. d4 *++[ECO "C44"]+[Opening "Konstantinopolsky opening"]++1. e4 e5 2. Nf3 Nc6 3. g3 *++[ECO "C44"]+[Opening "Dresden opening"]++1. e4 e5 2. Nf3 Nc6 3. c4 *++[ECO "C44"]+[Opening "Inverted Hungarian"]++1. e4 e5 2. Nf3 Nc6 3. Be2 *++[ECO "C44"]+[Opening "Inverted Hanham"]++1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d3 d5 5. Nbd2 *++[ECO "C44"]+[Opening "Tayler opening"]++1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d4 *++[ECO "C44"]+[Opening "Ponziani opening"]++1. e4 e5 2. Nf3 Nc6 3. c3 *++[ECO "C44"]+[Opening "Ponziani"]+[Variation "Caro variation"]++1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 Bd7 *++[ECO "C44"]+[Opening "Ponziani"]+[Variation "Leonhardt variation"]++1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 Nf6 *++[ECO "C44"]+[Opening "Ponziani"]+[Variation "Steinitz variation"]++1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 f6 *++[ECO "C44"]+[Opening "Ponziani"]+[Variation "Jaenisch counter-attack"]++1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 *++[ECO "C44"]+[Opening "Ponziani"]+[Variation "Fraser defence"]++1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 Nxe4 5. d5 Bc5 *++[ECO "C44"]+[Opening "Ponziani"]+[Variation "Reti variation"]++1. e4 e5 2. Nf3 Nc6 3. c3 Nge7 *++[ECO "C44"]+[Opening "Ponziani"]+[Variation "Romanishin variation"]++1. e4 e5 2. Nf3 Nc6 3. c3 Be7 *++[ECO "C44"]+[Opening "Ponziani counter-gambit"]++1. e4 e5 2. Nf3 Nc6 3. c3 f5 *++[ECO "C44"]+[Opening "Ponziani counter-gambit, Schmidt attack"]++1. e4 e5 2. Nf3 Nc6 3. c3 f5 4. d4 d6 5. d5 *++[ECO "C44"]+[Opening "Ponziani counter-gambit, Cordel variation"]++1. e4 e5 2. Nf3 Nc6 3. c3 f5 4. d4 d6 5. d5 fxe4 6. Ng5 Nb8 7. Nxe4 Nf6 8.+Bd3 Be7 *++[ECO "C44"]+[Opening "Scotch opening"]++1. e4 e5 2. Nf3 Nc6 3. d4 *++[ECO "C44"]+[Opening "Scotch"]+[Variation "Lolli variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4 *++[ECO "C44"]+[Opening "Scotch"]+[Variation "Cochrane variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4 4. Nxe5 Ne6 5. Bc4 c6 6. O-O Nf6 7. Nxf7 *++[ECO "C44"]+[Opening "Scotch"]+[Variation "Relfsson gambit ('MacLopez')"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bb5 *++[ECO "C44"]+[Opening "Scotch"]+[Variation "Goering gambit"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 *++[ECO "C44"]+[Opening "Scotch"]+[Variation "Sea-cadet mate"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Nxc3 d6 6. Bc4 Bg4 7. O-O Ne5+8. Nxe5 Bxd1 9. Bxf7+ Ke7 10. Nd5# *++[ECO "C44"]+[Opening "Scotch"]+[Variation "Goering gambit"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Nxc3 Bb4 *++[ECO "C44"]+[Opening "Scotch"]+[Variation "Goering gambit, Bardeleben variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Nxc3 Bb4 6. Bc4 Nf6 *++[ECO "C44"]+[Opening "Scotch gambit"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 *++[ECO "C44"]+[Opening "Scotch gambit"]+[Variation "Anderssen (Paulsen, Suhle) counter-attack"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. O-O d6 6. c3 Bg4 *++[ECO "C44"]+[Opening "Scotch gambit"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5 *++[ECO "C44"]+[Opening "Scotch gambit"]+[Variation "Cochrane-Shumov defence"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5 Nh6 6. Nxf7 Nxf7 7. Bxf7++Kxf7 8. Qh5+ g6 9. Qxc5 d5 *++[ECO "C44"]+[Opening "Scotch gambit"]+[Variation "Vitzhum attack"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5 Nh6 6. Qh5 *++[ECO "C44"]+[Opening "Scotch gambit"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ *++[ECO "C44"]+[Opening "Scotch gambit"]+[Variation "Hanneken variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ 5. c3 dxc3 6. O-O cxb2 7. Bxb2 +Nf6 8. Ng5 O-O 9. e5 Nxe5 *++[ECO "C44"]+[Opening "Scotch gambit"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ 5. c3 dxc3 6. bxc3 *++[ECO "C44"]+[Opening "Scotch gambit"]+[Variation "Cochrane variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ 5. c3 dxc3 6. bxc3 Ba5 7. e5 *++[ECO "C44"]+[Opening "Scotch gambit"]+[Variation "Benima defence"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Be7 *++[ECO "C44"]+[Opening "Scotch gambit"]+[Variation "Dubois-Reti defence"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 *++[ECO "C45"]+[Opening "Scotch game"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Ghulam Kassim variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 d6 6. Bd3 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Pulling counter-attack"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Horwitz attack"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Berger variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 Bb4+ 6. Nd2 Qxe4+ 7. Be2+Qxg2 8. Bf3 Qh3 9. Nxc7+ Kd8 10. Nxa8 Nf6 11. a3 *++[ECO "C45"]+[Opening "Scotch game"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 Bb4+ 6. Bd2 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Rosenthal variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 Bb4+ 6. Bd2 Qxe4+ 7. Be2+Kd8 8. O-O Bxd2 9. Nxd2 Qg6 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Fraser attack"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nf3 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Steinitz variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nc3 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Schmidt variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Mieses variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Tartakower variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. Nd2 *++[ECO "C45"]+[Opening "Scotch game"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Blackburne attack"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Qd2 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Gottschall variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Qd2 d5+8. Nb5 Bxe3 9. Qxe3 O-O 10. Nxc7 Rb8 11. Nxd5 Nxd5 12. exd5 Nb4 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Paulsen attack"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bb5 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Paulsen, Gunsberg defence"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bb5 Nd8+*++[ECO "C45"]+[Opening "Scotch"]+[Variation "Meitner variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Nc2 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Blumenfeld attack"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. Nb5 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Potter variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 *++[ECO "C45"]+[Opening "Scotch"]+[Variation "Romanishin variation"]++1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb4+ *++[ECO "C46"]+[Opening "Three knights game"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 *++[ECO "C46"]+[Opening "Three knights"]+[Variation "Schlechter variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Bb4 4. Nd5 Nf6 *++[ECO "C46"]+[Opening "Three knights"]+[Variation "Winawer defence (Gothic defence)"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 f5 *++[ECO "C46"]+[Opening "Three knights"]+[Variation "Steinitz variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 g6 *++[ECO "C46"]+[Opening "Three knights"]+[Variation "Steinitz, Rosenthal variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 g6 4. d4 exd4 5. Nd5 *++[ECO "C46"]+[Opening "Four knights game"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 *++[ECO "C46"]+[Opening "Four knights"]+[Variation "Schultze-Mueller gambit"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5 *++[ECO "C46"]+[Opening "Four knights"]+[Variation "Italian variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bc4 *++[ECO "C46"]+[Opening "Four knights"]+[Variation "Gunsberg variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. a3 *++[ECO "C47"]+[Opening "Four knights"]+[Variation "Scotch variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 *++[ECO "C47"]+[Opening "Four knights"]+[Variation "Scotch, Krause variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 Bb4 5. Nxe5 *++[ECO "C47"]+[Opening "Four knights"]+[Variation "Scotch, 4...exd4"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 *++[ECO "C47"]+[Opening "Four knights"]+[Variation "Belgrade gambit"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nd5 *++[ECO "C48"]+[Opening "Four knights"]+[Variation "Spanish variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 *++[ECO "C48"]+[Opening "Four knights"]+[Variation "Ranken variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 a6 5. Bxc6 *++[ECO "C48"]+[Opening "Four knights"]+[Variation "Spielmann variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 a6 5. Bxc6 dxc6 6. Nxe5 Nxe4 7. Nxe4+Qd4 8. O-O Qxe5 9. Re1 Be6 10. d4 Qd5 *++[ECO "C48"]+[Opening "Four knights"]+[Variation "Spanish, classical defence"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bc5 *++[ECO "C48"]+[Opening "Four knights"]+[Variation "Bardeleben variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bc5 5. O-O O-O 6. Nxe5 Nxe5 7. d4 Bd6+8. f4 Nc6 9. e5 Bb4 *++[ECO "C48"]+[Opening "Four knights"]+[Variation "Marshall variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bc5 5. O-O O-O 6. Nxe5 Nd4 *++[ECO "C48"]+[Opening "Four knights"]+[Variation "Rubinstein counter-gambit"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 *++[ECO "C48"]+[Opening "Four knights"]+[Variation "Rubinstein counter-gambit, Bogolyubov variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Nxe5 Qe7 6. f4 *++[ECO "C48"]+[Opening "Four knights"]+[Variation "Rubinstein counter-gambit, 5.Be2"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Be2 *++[ECO "C48"]+[Opening "Four knights"]+[Variation "Rubinstein counter-gambit Maroczy variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Be2 Nxf3+ 6. Bxf3 Bc5 7. O-O +O-O 8. d3 d6 9. Na4 Bb6 *++[ECO "C48"]+[Opening "Four knights"]+[Variation "Rubinstein counter-gambit, exchange variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Nxd4 *++[ECO "C48"]+[Opening "Four knights"]+[Variation "Rubinstein counter-gambit, Henneberger variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. O-O *++[ECO "C49"]+[Opening "Four knights"]+[Variation "double Ruy Lopez"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 *++[ECO "C49"]+[Opening "Four knights"]+[Variation "Gunsberg counter-attack"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. Nd5 Nxd5 7. exd5 e4+*++[ECO "C49"]+[Opening "Four knights"]+[Variation "double Ruy Lopez"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 *++[ECO "C49"]+[Opening "Four knights"]+[Variation "Alatortsev variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Qe7 7. Ne2 d5 *++[ECO "C49"]+[Opening "Four knights"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 *++[ECO "C49"]+[Opening "Four knights"]+[Variation "Janowski variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6+8. Re1 *++[ECO "C49"]+[Opening "Four knights"]+[Variation "Svenonius variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d5+*++[ECO "C49"]+[Opening "Four knights"]+[Variation "symmetrical variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 *++[ECO "C49"]+[Opening "Four knights"]+[Variation "symmetrical, Metger unpin"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 +8. bxc3 Qe7 *++[ECO "C49"]+[Opening "Four knights"]+[Variation "symmetrical, Capablanca variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 +8. bxc3 Qe7 9. Re1 Nd8 10. d4 Bg4 *++[ECO "C49"]+[Opening "Four knights"]+[Variation "symmetrical, Pillsbury variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Ne7 *++[ECO "C49"]+[Opening "Four knights"]+[Variation "symmetrical, Blake variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Ne7 8.+Nh4 c6 9. Bc4 d5 10. Bb3 Qd6 *++[ECO "C49"]+[Opening "Four knights"]+[Variation "symmetrical, Tarrasch variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Be6 *++[ECO "C49"]+[Opening "Four knights"]+[Variation "symmetrical, Maroczy system"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Ne2 *++[ECO "C49"]+[Opening "Four knights"]+[Variation "Nimzovich (Paulsen) variation"]++1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. Bxc6 *++[ECO "C50"]+[Opening "King's pawn game"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 *++[ECO "C50"]+[Opening "Blackburne shilling gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nd4 4. Nxe5 Qg5 5. Nxf7 Qxg2 6. Rf1 Qxe4+ 7. Be2+Nf3# *++[ECO "C50"]+[Opening "Rousseau gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 f5 *++[ECO "C50"]+[Opening "Hungarian defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 *++[ECO "C50"]+[Opening "Hungarian defence"]+[Variation "Tartakower variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 exd4 5. c3 Nf6 6. e5 Ne4 *++[ECO "C50"]+[Opening "Giuoco Piano"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 *++[ECO "C50"]+[Opening "Giuoco Piano"]+[Variation "four knights variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 *++[ECO "C50"]+[Opening "Giuoco Piano"]+[Variation "Jerome gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Bxf7+ *++[ECO "C50"]+[Opening "Giuoco Pianissimo"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 *++[ECO "C50"]+[Opening "Giuoco Pianissimo"]+[Variation "Dubois variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 f5 5. Ng5 f4 *++[ECO "C50"]+[Opening "Giuoco Pianissimo"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 *++[ECO "C50"]+[Opening "Giuoco Pianissimo"]+[Variation "Italian four knights variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3 *++[ECO "C50"]+[Opening "Giuoco Pianissimo"]+[Variation "Canal variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3 d6 6. Bg5 *++[ECO "C51"]+[Opening "Evans gambit declined"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 *++[ECO "C51"]+[Opening "Evans gambit declined, Lange variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Nh6 *++[ECO "C51"]+[Opening "Evans gambit declined, Pavlov variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Nh6 7. d4 d6 8.+Bxh6 dxe5 9. Bxg7 Rg8 10. Bxf7+ Kxf7 11. Bxe5 Qg5 12. Nd2 *++[ECO "C51"]+[Opening "Evans gambit declined, Hirschbach variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Qg5 *++[ECO "C51"]+[Opening "Evans gambit declined, Vasquez variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Qg5 7. Bxf7+ Ke7+8. Qh5 *++[ECO "C51"]+[Opening "Evans gambit declined, Hicken variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Qg5 7. Qf3 Qxe5+8. Qxf7+ Kd8 9. Bb2 *++[ECO "C51"]+[Opening "Evans gambit declined, 5.a4"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. a4 *++[ECO "C51"]+[Opening "Evans gambit declined, Showalter variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. a4 a6 6. Nc3 *++[ECO "C51"]+[Opening "Evans gambit declined, Cordel variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. Bb2 *++[ECO "C51"]+[Opening "Evans counter-gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 d5 *++[ECO "C51"]+[Opening "Evans gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 *++[ECO "C51"]+[Opening "Evans gambit"]+[Variation "normal variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8.+cxd4 Bb6 *++[ECO "C51"]+[Opening "Evans gambit"]+[Variation "Ulvestad variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8.+cxd4 Bb6 9. d5 Na5 10. Bb2 *++[ECO "C51"]+[Opening "Evans gambit"]+[Variation "Paulsen variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8.+cxd4 Bb6 9. d5 Na5 10. Bb2 Ne7 *++[ECO "C51"]+[Opening "Evans gambit"]+[Variation "Morphy attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8.+cxd4 Bb6 9. Nc3 *++[ECO "C51"]+[Opening "Evans gambit"]+[Variation "Goering attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8.+cxd4 Bb6 9. Nc3 Na5 10. Bg5 *++[ECO "C51"]+[Opening "Evans gambit"]+[Variation "Steinitz variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8.+cxd4 Bb6 9. Nc3 Na5 10. Bg5 f6 11. Be3 *++[ECO "C51"]+[Opening "Evans gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8.+cxd4 Bb6 9. Nc3 Bg4 *++[ECO "C51"]+[Opening "Evans gambit"]+[Variation "Fraser attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8.+cxd4 Bb6 9. Nc3 Bg4 10. Qa4 *++[ECO "C51"]+[Opening "Evans gambit"]+[Variation "Fraser-Mortimer attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8.+cxd4 Bb6 9. Nc3 Bg4 10. Qa4 Bd7 11. Qb3 Na5 12. Bxf7+ Kf8 13. Qc2 *++[ECO "C51"]+[Opening "Evans gambit"]+[Variation "Stone-Ware variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bd6 *++[ECO "C51"]+[Opening "Evans gambit"]+[Variation "Mayet defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bf8 *++[ECO "C51"]+[Opening "Evans gambit"]+[Variation "5...Be7"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 *++[ECO "C51"]+[Opening "Evans gambit"]+[Variation "Cordel variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. d4 Na5 *++[ECO "C52"]+[Opening "Evans gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 *++[ECO "C52"]+[Opening "Evans gambit"]+[Variation "compromised defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O dxc3+*++[ECO "C52"]+[Opening "Evans gambit"]+[Variation "compromised defence, Paulsen variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O dxc3+8. Qb3 Qf6 9. e5 Qg6 10. Nxc3 Nge7 11. Ba3 *++[ECO "C52"]+[Opening "Evans gambit"]+[Variation "compromised defence, Potter variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O dxc3+8. Qb3 Qf6 9. e5 Qg6 10. Nxc3 Nge7 11. Rd1 *++[ECO "C52"]+[Opening "Evans gambit"]+[Variation "Leonhardt variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 b5 *++[ECO "C52"]+[Opening "Evans gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 *++[ECO "C52"]+[Opening "Evans gambit"]+[Variation "Tartakower attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Qb3 *++[ECO "C52"]+[Opening "Evans gambit"]+[Variation "Levenfish variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Qb3 Qd7 8.+dxe5 dxe5 9. O-O Bb6 10. Ba3 Na5 11. Nxe5 *++[ECO "C52"]+[Opening "Evans gambit"]+[Variation "Sokolsky variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Bg5 *++[ECO "C52"]+[Opening "Evans gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O *++[ECO "C52"]+[Opening "Evans gambit"]+[Variation "Richardson attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O Nf6 7. d4 O-O 8.+Nxe5 *++[ECO "C52"]+[Opening "Evans gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6 *++[ECO "C52"]+[Opening "Evans gambit"]+[Variation "Waller attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6 7. d4 exd4 8.+Qb3 *++[ECO "C52"]+[Opening "Evans gambit"]+[Variation "Lasker defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6 7. d4 Bb6 *++[ECO "C52"]+[Opening "Evans gambit"]+[Variation "Sanders-Alapin variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6 7. d4 Bd7 *++[ECO "C52"]+[Opening "Evans gambit"]+[Variation "Alapin-Steinitz variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. O-O d6 7. d4 Bg4 *++[ECO "C53"]+[Opening "Giuoco Piano"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 *++[ECO "C53"]+[Opening "Giuoco Piano"]+[Variation "LaBourdonnais variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 *++[ECO "C53"]+[Opening "Giuoco Piano"]+[Variation "close variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 *++[ECO "C53"]+[Opening "Giuoco Piano"]+[Variation "centre-holding variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6 *++[ECO "C53"]+[Opening "Giuoco Piano"]+[Variation "Tarrasch variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6 6. O-O Nf6 7. a4 a6 8. +Re1 d6 9. h3 *++[ECO "C53"]+[Opening "Giuoco Piano"]+[Variation "Mestel variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6 6. Bg5 *++[ECO "C53"]+[Opening "Giuoco Piano"]+[Variation "Eisinger variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. d4 Bb6 6. d5 Nb8 7. d6 *++[ECO "C53"]+[Opening "Giuoco Piano"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 *++[ECO "C53"]+[Opening "Giuoco Piano"]+[Variation "Bird's attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. b4 *++[ECO "C53"]+[Opening "Giuoco Piano"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 *++[ECO "C53"]+[Opening "Giuoco Piano"]+[Variation "Ghulam Kassim variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 Ne4 7. Bd5 Nxf2 +8. Kxf2 dxc3+ 9. Kg3 *++[ECO "C53"]+[Opening "Giuoco Piano"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 d5 *++[ECO "C53"]+[Opening "Giuoco Piano"]+[Variation "Anderssen variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 d5 7. Bb5 Ne4 8.+cxd4 Bb4+ *++[ECO "C54"]+[Opening "Giuoco Piano"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 *++[ECO "C54"]+[Opening "Giuoco Piano"]+[Variation "Krause variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 +Nxe4 8. Bxb4 Nxb4 9. Bxf7+ Kxf7 10. Qb3+ d5 11. Ne5+ Kf6 12. f3 *++[ECO "C54"]+[Opening "Giuoco Piano"]+[Variation "Cracow variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Kf1 *++[ECO "C54"]+[Opening "Giuoco Piano"]+[Variation "Greco's attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 *++[ECO "C54"]+[Opening "Giuoco Piano"]+[Variation "Greco variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 +Nxe4 8. O-O Nxc3 *++[ECO "C54"]+[Opening "Giuoco Piano"]+[Variation "Bernstein variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 +Nxe4 8. O-O Nxc3 9. bxc3 Bxc3 10. Qb3 d5 *++[ECO "C54"]+[Opening "Giuoco Piano"]+[Variation "Aitken variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 +Nxe4 8. O-O Nxc3 9. bxc3 Bxc3 10. Ba3 *++[ECO "C54"]+[Opening "Giuoco Piano"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 +Nxe4 8. O-O Bxc3 *++[ECO "C54"]+[Opening "Giuoco Piano"]+[Variation "Steinitz variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 +Nxe4 8. O-O Bxc3 9. bxc3 d5 10. Ba3 *++[ECO "C54"]+[Opening "Giuoco Piano"]+[Variation "Moeller (Therkatz) attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 +Nxe4 8. O-O Bxc3 9. d5 *++[ECO "C54"]+[Opening "Giuoco Piano"]+[Variation "Therkatz-Herzog variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 +Nxe4 8. O-O Bxc3 9. d5 Bf6 10. Re1 Ne7 11. Rxe4 d6 12. Bg5 Bxg5 13. Nxg5 +O-O 14. Nxh7 *++[ECO "C54"]+[Opening "Giuoco Piano"]+[Variation "Moeller, bayonet attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 +Nxe4 8. O-O Bxc3 9. d5 Bf6 10. Re1 Ne7 11. Rxe4 d6 12. g4 *++[ECO "C55"]+[Opening "Two knights defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 *++[ECO "C55"]+[Opening "Giuoco piano"]+[Variation "Rosentreter variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. O-O Bc5 5. d4 Bxd4 6. Nxd4 Nxd4 7. Bg5 h6+8. Bh4 g5 9. f4 *++[ECO "C55"]+[Opening "Giuoco piano"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. O-O Bc5 5. d4 Bxd4 6. Nxd4 Nxd4 7. Bg5 d6+*++[ECO "C55"]+[Opening "Giuoco piano"]+[Variation "Holzhausen attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. O-O Bc5 5. d4 Bxd4 6. Nxd4 Nxd4 7. Bg5 d6+8. f4 Qe7 9. fxe5 dxe5 10. Nc3 *++[ECO "C55"]+[Opening "Two knights defence (Modern bishop's opening)"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 *++[ECO "C55"]+[Opening "Two knights defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 *++[ECO "C55"]+[Opening "Two knights defence, Keidanz variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. e5 d5 6. Bb5 Ne4 7. Nxd4 Bc5 +8. Nxc6 Bxf2+ 9. Kf1 Qh4 *++[ECO "C55"]+[Opening "Two knights defence, Perreux variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. Ng5 *++[ECO "C55"]+[Opening "Two knights defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O *++[ECO "C55"]+[Opening "two knights"]+[Variation "Max Lange attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 *++[ECO "C55"]+[Opening "two knights"]+[Variation "Max Lange attack, Berger variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 d5 7. exf6 dxc4+8. Re1+ Be6 9. Ng5 Qd5 10. Nc3 Qf5 11. g4 Qg6 12. Nce4 Bb6 13. f4 O-O-O *++[ECO "C55"]+[Opening "two knights"]+[Variation "Max Lange attack, Marshall variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 d5 7. exf6 dxc4+8. Re1+ Be6 9. Ng5 Qd5 10. Nc3 Qf5 11. Nce4 *++[ECO "C55"]+[Opening "two knights"]+[Variation "Max Lange attack, Rubinstein variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 d5 7. exf6 dxc4+8. Re1+ Be6 9. Ng5 Qd5 10. Nc3 Qf5 11. Nce4 Bf8 *++[ECO "C55"]+[Opening "two knights"]+[Variation "Max Lange attack, Loman defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 d5 7. exf6 dxc4+8. Re1+ Be6 9. Ng5 g6 *++[ECO "C55"]+[Opening "two knights"]+[Variation "Max Lange attack, Schlechter variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 d5 7. exf6 dxc4+8. Re1+ Be6 9. fxg7 *++[ECO "C55"]+[Opening "two knights"]+[Variation "Max Lange attack, Steinitz variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 Ng4 *++[ECO "C55"]+[Opening "two knights"]+[Variation "Max Lange attack, Krause variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Bc5 6. e5 Ng4 7. c3 *++[ECO "C56"]+[Opening "Two knights defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Nxe4 *++[ECO "C56"]+[Opening "two knights defence"]+[Variation "Yurdansky attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Nxe4 6. Re1 d5 7. Bxd5 +Qxd5 8. Nc3 Qa5 9. Nxe4 Be6 10. Bg5 h6 11. Bh4 g5 12. Nf6+ Ke7 13. b4 *++[ECO "C56"]+[Opening "two knights defence"]+[Variation "Canal variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O Nxe4 6. Re1 d5 7. Nc3 *++[ECO "C57"]+[Opening "Two knights defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 *++[ECO "C57"]+[Opening "two knights defence"]+[Variation "Wilkes Barre (Traxler) variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Bc5 *++[ECO "C57"]+[Opening "two knights defence"]+[Variation "Ulvestad variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5 *++[ECO "C57"]+[Opening "two knights defence"]+[Variation "Fritz variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nd4 *++[ECO "C57"]+[Opening "two knights defence"]+[Variation "Fritz, Gruber variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nd4 6. c3 b5 7. Bf1 Nxd5 +8. Ne4 *++[ECO "C57"]+[Opening "two knights defence"]+[Variation "Lolli attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. d4 *++[ECO "C57"]+[Opening "two knights defence"]+[Variation "Pincus variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. d4 Bb4+ *++[ECO "C57"]+[Opening "two knights defence"]+[Variation "Fegatello attack"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7 *++[ECO "C57"]+[Opening "two knights defence"]+[Variation "Fegatello attack, Leonhardt variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7 Kxf7 7. Qf3++Ke6 8. Nc3 Nb4 9. Qe4 c6 10. a3 Na6 11. d4 Nc7 *++[ECO "C57"]+[Opening "two knights defence"]+[Variation "Fegatello attack, Polerio defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7 Kxf7 7. Qf3++Ke6 8. Nc3 Ne7 *++[ECO "C58"]+[Opening "two knights defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 *++[ECO "C58"]+[Opening "two knights defence"]+[Variation "Kieseritsky variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. d3 *++[ECO "C58"]+[Opening "two knights defence"]+[Variation "Yankovich variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. d3 h6 7. Nf3 e4 8.+Qe2 Nxc4 9. dxc4 Bc5 10. Nfd2 *++[ECO "C58"]+[Opening "two knights defence"]+[Variation "Maroczy variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. d3 h6 7. Nf3 e4 8.+Qe2 Nxc4 9. dxc4 Be7 *++[ECO "C58"]+[Opening "Two knights defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ *++[ECO "C58"]+[Opening "two knights defence"]+[Variation "Bogolyubov variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 +bxc6 8. Qf3 *++[ECO "C58"]+[Opening "two knights defence"]+[Variation "Paoli variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 +bxc6 8. Qf3 Qc7 9. Bd3 *++[ECO "C58"]+[Opening "two knights defence"]+[Variation "Colman variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 +bxc6 8. Qf3 Rb8 *++[ECO "C58"]+[Opening "two knights defence"]+[Variation "Blackburne variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 +bxc6 8. Qf3 cxb5 *++[ECO "C58"]+[Opening "Two knights defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 +bxc6 8. Be2 *++[ECO "C59"]+[Opening "Two knights defence"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 +bxc6 8. Be2 h6 *++[ECO "C59"]+[Opening "two knights defence"]+[Variation "Knorre variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 +bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5 Bd6 11. d4 Qc7 12. Bd2 *++[ECO "C59"]+[Opening "two knights defence"]+[Variation "Goering variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 +bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5 Qc7 *++[ECO "C59"]+[Opening "two knights defence"]+[Variation "Steinitz variation"]++1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 +bxc6 8. Be2 h6 9. Nh3 *++[ECO "C60"]+[Opening "Ruy Lopez (Spanish opening)"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 *++[ECO "C60"]+[Opening "Ruy Lopez"]+[Variation "Nuernberg variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 f6 *++[ECO "C60"]+[Opening "Ruy Lopez"]+[Variation "Pollock defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Na5 *++[ECO "C60"]+[Opening "Ruy Lopez"]+[Variation "Lucena defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Be7 *++[ECO "C60"]+[Opening "Ruy Lopez"]+[Variation "Vinogradov variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Qe7 *++[ECO "C60"]+[Opening "Ruy Lopez"]+[Variation "Brentano defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 g5 *++[ECO "C60"]+[Opening "Ruy Lopez"]+[Variation "fianchetto (Smyslov/Barnes) defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 *++[ECO "C60"]+[Opening "Ruy Lopez"]+[Variation "Cozio defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 *++[ECO "C60"]+[Opening "Ruy Lopez"]+[Variation "Cozio defence, Paulsen variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. Nc3 g6 *++[ECO "C61"]+[Opening "Ruy Lopez"]+[Variation "Bird's defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 *++[ECO "C61"]+[Opening "Ruy Lopez"]+[Variation "Bird's defence, Paulsen variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. O-O Ne7 *++[ECO "C62"]+[Opening "Ruy Lopez"]+[Variation "old Steinitz defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 *++[ECO "C62"]+[Opening "Ruy Lopez"]+[Variation "old Steinitz defence, Nimzovich attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. Nc3 Nf6 6. Bxc6 *++[ECO "C62"]+[Opening "Ruy Lopez"]+[Variation "old Steinitz defence, semi-Duras variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. c4 *++[ECO "C63"]+[Opening "Ruy Lopez"]+[Variation "Schliemann defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 *++[ECO "C63"]+[Opening "Ruy Lopez"]+[Variation "Schliemann defence, Berger variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 *++[ECO "C64"]+[Opening "Ruy Lopez"]+[Variation "classical (Cordel) defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 *++[ECO "C64"]+[Opening "Ruy Lopez"]+[Variation "classical defence, Zaitsev variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. O-O Nd4 5. b4 *++[ECO "C64"]+[Opening "Ruy Lopez"]+[Variation "classical defence, 4.c3"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 *++[ECO "C64"]+[Opening "Ruy Lopez"]+[Variation "classical defence, Benelux variation  "]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Nf6 5. O-O O-O 6. d4 Bb6 *++[ECO "C64"]+[Opening "Ruy Lopez"]+[Variation "classical defence, Charousek variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Bb6 *++[ECO "C64"]+[Opening "Ruy Lopez"]+[Variation "classical defence, Boden variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Qe7 *++[ECO "C64"]+[Opening "Ruy Lopez"]+[Variation "Cordel gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 f5 *++[ECO "C65"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 *++[ECO "C65"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Nyholm attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d4 exd4 5. O-O *++[ECO "C65"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Mortimer variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Ne7 *++[ECO "C65"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Mortimer trap"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Ne7 5. Nxe5 c6 *++[ECO "C65"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Anderssen variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. Bxc6+ *++[ECO "C65"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Duras variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. c4 *++[ECO "C65"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Kaufmann variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Be3 *++[ECO "C65"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, 4.O-O"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O *++[ECO "C65"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Beverwijk variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5 *++[ECO "C66"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, 4.O-O, d6"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 *++[ECO "C66"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, hedgehog variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7 *++[ECO "C66"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Tarrasch trap"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7 7. Re1 O-O *++[ECO "C66"]+[Opening "Ruy Lopez"]+[Variation "closed Berlin defence, Bernstein variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7 7. Bg5 *++[ECO "C66"]+[Opening "Ruy Lopez"]+[Variation "closed Berlin defence, Showalter variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7 7. Bxc6 *++[ECO "C66"]+[Opening "Ruy Lopez"]+[Variation "closed Berlin defence, Wolf variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 exd4 *++[ECO "C66"]+[Opening "Ruy Lopez"]+[Variation "closed Berlin defence, Chigorin variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Nd7 *++[ECO "C67"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, open variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 *++[ECO "C67"]+[Opening "Ruy Lopez"]+[Variation "open Berlin defence, l'Hermet variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. dxe5 *++[ECO "C67"]+[Opening "Ruy Lopez"]+[Variation "open Berlin defence, Showalter variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Ba4 *++[ECO "C67"]+[Opening "Ruy Lopez"]+[Variation "open Berlin defence, 5...Be7"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 *++[ECO "C67"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Rio de Janeiro variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 +bxc6 8. dxe5 Nb7 9. Nc3 O-O 10. Re1 Nc5 11. Nd4 Ne6 12. Be3 Nxd4 13. Bxd4 +c5 *++[ECO "C67"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Zukertort variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 +bxc6 8. dxe5 Nb7 9. c4 *++[ECO "C67"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Pillsbury variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 +bxc6 8. dxe5 Nb7 9. b3 *++[ECO "C67"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Winawer attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 +bxc6 8. dxe5 Nb7 9. Nd4 *++[ECO "C67"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Cordel variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 +bxc6 8. dxe5 Nf5 *++[ECO "C67"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Trifunovic variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 d5 *++[ECO "C67"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Minckwitz variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. dxe5 *++[ECO "C67"]+[Opening "Ruy Lopez"]+[Variation "Berlin defence, Rosenthal variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 a6 *++[ECO "C68"]+[Opening "Ruy Lopez"]+[Variation "exchange variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 *++[ECO "C68"]+[Opening "Ruy Lopez"]+[Variation "exchange, Alekhine variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4+Bd7 *++[ECO "C68"]+[Opening "Ruy Lopez"]+[Variation "exchange, Keres variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3 *++[ECO "C68"]+[Opening "Ruy Lopez"]+[Variation "exchange, Romanovsky variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3 f6 6. d3 *++[ECO "C69"]+[Opening "Ruy Lopez"]+[Variation "exchange variation, 5.O-O"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O *++[ECO "C69"]+[Opening "Ruy Lopez"]+[Variation "exchange variation, Alapin gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Bg4 6. h3 h5 *++[ECO "C69"]+[Opening "Ruy Lopez"]+[Variation "exchange, Gligoric variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O f6 *++[ECO "C69"]+[Opening "Ruy Lopez"]+[Variation "exchange, Bronstein variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Qd6 *++[ECO "C70"]+[Opening "Ruy Lopez"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 *++[ECO "C70"]+[Opening "Ruy Lopez"]+[Variation "fianchetto defence deferred"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 g6 *++[ECO "C70"]+[Opening "Ruy Lopez"]+[Variation "Cozio defence deferred"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nge7 *++[ECO "C70"]+[Opening "Ruy Lopez"]+[Variation "Bird's defence deferred"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nd4 *++[ECO "C70"]+[Opening "Ruy Lopez"]+[Variation "Alapin's defence deferred"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bb4 *++[ECO "C70"]+[Opening "Ruy Lopez"]+[Variation "Classical defence deferred"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bc5 *++[ECO "C70"]+[Opening "Ruy Lopez"]+[Variation "Caro variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 *++[ECO "C70"]+[Opening "Ruy Lopez"]+[Variation "Graz variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Bc5 *++[ECO "C70"]+[Opening "Ruy Lopez"]+[Variation "Taimanov (chase/wing/accelerated counterthrust) variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Na5 *++[ECO "C70"]+[Opening "Ruy Lopez"]+[Variation "Schliemann defence deferred"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 f5 *++[ECO "C71"]+[Opening "Ruy Lopez"]+[Variation "modern Steinitz defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 *++[ECO "C71"]+[Opening "Ruy Lopez"]+[Variation "Noah's ark trap"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. d4 b5 6. Bb3 Nxd4 7. Nxd4 exd4 +8. Qxd4 c5 *++[ECO "C71"]+[Opening "Ruy Lopez"]+[Variation "modern Steinitz defence, Three knights variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Nc3 *++[ECO "C71"]+[Opening "Ruy Lopez"]+[Variation "modern Steinitz defence, Duras (Keres) variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c4 *++[ECO "C72"]+[Opening "Ruy Lopez"]+[Variation "modern Steinitz defence, 5.O-O"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O *++[ECO "C73"]+[Opening "Ruy Lopez"]+[Variation "modern Steinitz defence, Richter variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 *++[ECO "C73"]+[Opening "Ruy Lopez"]+[Variation "modern Steinitz defence, Alapin variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 f6 *++[ECO "C74"]+[Opening "Ruy Lopez"]+[Variation "modern Steinitz defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 *++[ECO "C74"]+[Opening "Ruy Lopez"]+[Variation "modern Steinitz defence, siesta variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 f5 *++[ECO "C74"]+[Opening "Ruy Lopez"]+[Variation "Siesta, Kopayev variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 f5 6. exf5 Bxf5 7. O-O *++[ECO "C75"]+[Opening "Ruy Lopez"]+[Variation "modern Steinitz defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 *++[ECO "C75"]+[Opening "Ruy Lopez"]+[Variation "modern Steinitz defence, Rubinstein variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 Nge7 *++[ECO "C76"]+[Opening "Ruy Lopez"]+[Variation "modern Steinitz defence, fianchetto (Bronstein) variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 g6 *++[ECO "C77"]+[Opening "Ruy Lopez"]+[Variation "Morphy defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 *++[ECO "C77"]+[Opening "Ruy Lopez"]+[Variation "four knights (Tarrasch) variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Nc3 *++[ECO "C77"]+[Opening "Ruy Lopez"]+[Variation "Treybal (Bayreuth) variation (exchange var. deferred)"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Bxc6 *++[ECO "C77"]+[Opening "Ruy Lopez"]+[Variation "Wormald (Alapin) attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 *++[ECO "C77"]+[Opening "Ruy Lopez"]+[Variation "Wormald attack, Gruenfeld variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. d4 d6 8. +c3 Bg4 *++[ECO "C77"]+[Opening "Ruy Lopez"]+[Variation "Anderssen variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 *++[ECO "C77"]+[Opening "Ruy Lopez"]+[Variation "Morphy defence, Duras variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 d6 6. c4 *++[ECO "C78"]+[Opening "Ruy Lopez"]+[Variation "5.O-O"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O *++[ECO "C78"]+[Opening "Ruy Lopez"]+[Variation "Wing attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. a4 *++[ECO "C78"]+[Opening "Ruy Lopez"]+[Variation "...b5 & ...d6"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6 *++[ECO "C78"]+[Opening "Ruy Lopez"]+[Variation "Rabinovich variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6 7. Ng5 d5 8. +exd5 Nd4 9. Re1 Bc5 10. Rxe5+ Kf8 *++[ECO "C78"]+[Opening "Ruy Lopez"]+[Variation "Archangelsk (counterthrust) variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 *++[ECO "C78"]+[Opening "Ruy Lopez"]+[Variation "Moeller defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5 *++[ECO "C79"]+[Opening "Ruy Lopez"]+[Variation "Steinitz defence deferred (Russian defence)"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 *++[ECO "C79"]+[Opening "Ruy Lopez"]+[Variation "Steinitz defence deferred, Lipnitsky variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. d4 Bg4+*++[ECO "C79"]+[Opening "Ruy Lopez"]+[Variation "Steinitz defence deferred, Rubinstein variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. d4 Nxe4+*++[ECO "C79"]+[Opening "Ruy Lopez"]+[Variation "Steinitz defence deferred, Boleslavsky variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. d4 Nxe4+8. Re1 f5 9. dxe5 d5 10. Nc3 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open (Tarrasch) defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, Tartakower variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. Qe2 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, Knorre variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. Nc3 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, 6.d4"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, Riga variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 exd4 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, 6.d4 b5"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, Friess attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Nxe5 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, Richter variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. d5 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, 7.Bb3"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, Schlechter defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+a4 Nxd4 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, Berger variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+a4 Nxd4 9. Nxd4 exd4 10. Nc3 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, Harksen gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+c4 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, 8.de"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, Zukertort variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Ne7 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, 8...Be6"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, Bernstein variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. Nbd2 *++[ECO "C80"]+[Opening "Ruy Lopez"]+[Variation "open, Bernstein variation, Karpov gambit"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. Nbd2 Nc5 10. c3 d4 11. Ng5 *++[ECO "C81"]+[Opening "Ruy Lopez"]+[Variation "open, Howell attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. Qe2 *++[ECO "C81"]+[Opening "Ruy Lopez"]+[Variation "open, Howell attack, Ekstroem variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. Qe2 Be7 10. Rd1 O-O 11. c4 bxc4 12. Bxc4 Qd7 *++[ECO "C81"]+[Opening "Ruy Lopez"]+[Variation "open, Howell attack, Adam variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. Qe2 Be7 10. c4 *++[ECO "C82"]+[Opening "Ruy Lopez"]+[Variation "open, 9.c3"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. c3 *++[ECO "C82"]+[Opening "Ruy Lopez"]+[Variation "open, Berlin variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. c3 Nc5 *++[ECO "C82"]+[Opening "Ruy Lopez"]+[Variation "open, Italian variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. c3 Bc5 *++[ECO "C82"]+[Opening "Ruy Lopez"]+[Variation "open, St. Petersburg variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. c3 Bc5 10. Nbd2 *++[ECO "C82"]+[Opening "Ruy Lopez"]+[Variation "open, Dilworth variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. c3 Bc5 10. Nbd2 O-O 11. Bc2 Nxf2 *++[ECO "C82"]+[Opening "Ruy Lopez"]+[Variation "open, Motzko attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. c3 Bc5 10. Qd3 *++[ECO "C82"]+[Opening "Ruy Lopez"]+[Variation "open, Motzko attack, Nenarokov variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. c3 Bc5 10. Qd3 Ne7 *++[ECO "C83"]+[Opening "Ruy Lopez"]+[Variation "open, classical defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. c3 Be7 *++[ECO "C83"]+[Opening "Ruy Lopez"]+[Variation "open, Malkin variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. c3 Be7 10. Nbd2 O-O 11. Qe2 *++[ECO "C83"]+[Opening "Ruy Lopez"]+[Variation "open, 9...Be7, 10.Re1"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. c3 Be7 10. Re1 *++[ECO "C83"]+[Opening "Ruy Lopez"]+[Variation "open, Tarrasch trap"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. c3 Be7 10. Re1 O-O 11. Nd4 Qd7 12. Nxe6 fxe6 13. Rxe4 *++[ECO "C83"]+[Opening "Ruy Lopez"]+[Variation "open, Breslau variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8.+dxe5 Be6 9. c3 Be7 10. Re1 O-O 11. Nd4 Nxe5 *++[ECO "C84"]+[Opening "Ruy Lopez"]+[Variation "closed defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 *++[ECO "C84"]+[Opening "Ruy Lopez"]+[Variation "closed, centre attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d4 *++[ECO "C84"]+[Opening "Ruy Lopez"]+[Variation "closed, Basque gambit (North Spanish variation)"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d4 exd4 7. e5 Ne4 8.+c3 *++[ECO "C85"]+[Opening "Ruy Lopez"]+[Variation "Exchange variation doubly deferred (DERLD)"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6 *++[ECO "C86"]+[Opening "Ruy Lopez"]+[Variation "Worrall attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 *++[ECO "C86"]+[Opening "Ruy Lopez"]+[Variation "Worrall attack, sharp line"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O *++[ECO "C86"]+[Opening "Ruy Lopez"]+[Variation "Worrall attack, solid line"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 *++[ECO "C87"]+[Opening "Ruy Lopez"]+[Variation "closed, Averbach variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 d6 *++[ECO "C88"]+[Opening "Ruy Lopez"]+[Variation "closed"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 *++[ECO "C88"]+[Opening "Ruy Lopez"]+[Variation "closed, Leonhardt variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8.+c3 Na5 9. Bc2 c5 10. d4 Qc7 11. h3 Nc6 12. d5 Nb8 13. Nbd2 g5 *++[ECO "C88"]+[Opening "Ruy Lopez"]+[Variation "closed, Balla variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8.+c3 Na5 9. Bc2 c5 10. d4 Qc7 11. a4 *++[ECO "C88"]+[Opening "Ruy Lopez"]+[Variation "closed, 7...d6, 8.d4"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8.+d4 *++[ECO "C88"]+[Opening "Ruy Lopez"]+[Variation "Noah's ark trap"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8.+d4 Nxd4 9. Nxd4 exd4 10. Qxd4 c5 *++[ECO "C88"]+[Opening "Ruy Lopez"]+[Variation "Trajkovic counter-attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 Bb7 *++[ECO "C88"]+[Opening "Ruy Lopez"]+[Variation "closed, 7...O-O"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O *++[ECO "C88"]+[Opening "Ruy Lopez"]+[Variation "closed, anti-Marshall 8.a4"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+a4 *++[ECO "C88"]+[Opening "Ruy Lopez"]+[Variation "closed, 8.c3"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 *++[ECO "C89"]+[Opening "Ruy Lopez"]+[Variation "Marshall counter-attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d5 *++[ECO "C89"]+[Opening "Ruy Lopez"]+[Variation "Marshall counter-attack, 11...c6"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 *++[ECO "C89"]+[Opening "Ruy Lopez"]+[Variation "Marshall, Kevitz variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. Bxd5 cxd5 13. d4 Bd6 14. +Re3 *++[ECO "C89"]+[Opening "Ruy Lopez"]+[Variation "Marshall, main line, 12.d2d4"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 *++[ECO "C89"]+[Opening "Ruy Lopez"]+[Variation "Marshall, main line, 14...Qh3"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re1 Qh4 14. g3+Qh3 *++[ECO "C89"]+[Opening "Ruy Lopez"]+[Variation "Marshall, main line, Spassky variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re1 Qh4 14. g3+Qh3 15. Be3 Bg4 16. Qd3 Rae8 17. Nd2 Re6 18. a4 Qh5 *++[ECO "C89"]+[Opening "Ruy Lopez"]+[Variation "Marshall, Herman Steiner variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d5 9. exd5 e4 *++[ECO "C90"]+[Opening "Ruy Lopez"]+[Variation "closed (with ...d6)"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 *++[ECO "C90"]+[Opening "Ruy Lopez"]+[Variation "closed, Pilnik variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. d3 *++[ECO "C90"]+[Opening "Ruy Lopez"]+[Variation "closed, Lutikov variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. Bc2 *++[ECO "C90"]+[Opening "Ruy Lopez"]+[Variation "closed, Suetin variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. a3 *++[ECO "C91"]+[Opening "Ruy Lopez"]+[Variation "closed, 9.d4"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. d4 *++[ECO "C91"]+[Opening "Ruy Lopez"]+[Variation "closed, Bogolyubov variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. d4 Bg4 *++[ECO "C92"]+[Opening "Ruy Lopez"]+[Variation "closed, 9.h3"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 *++[ECO "C92"]+[Opening "Ruy Lopez"]+[Variation "closed, Keres (9...a5) variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 a5 *++[ECO "C92"]+[Opening "Ruy Lopez"]+[Variation "closed, Kholmov variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Be6 *++[ECO "C92"]+[Opening "Ruy Lopez"]+[Variation "closed, Ragozin-Petrosian (`Keres') variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Nd7 *++[ECO "C92"]+[Opening "Ruy Lopez"]+[Variation "closed, Flohr-Zaitsev system (Lenzerheide variation)"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Bb7 *++[ECO "C93"]+[Opening "Ruy Lopez"]+[Variation "closed, Smyslov defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 h6 *++[ECO "C94"]+[Opening "Ruy Lopez"]+[Variation "closed, Breyer defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Nb8 *++[ECO "C95"]+[Opening "Ruy Lopez"]+[Variation "closed, Breyer, 10.d4"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Nb8 10. d4 *++[ECO "C95"]+[Opening "Ruy Lopez"]+[Variation "closed, Breyer, Borisenko variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Nb8 10. d4 Nbd7 *++[ECO "C95"]+[Opening "Ruy Lopez"]+[Variation "closed, Breyer, Gligoric variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 c5 *++[ECO "C95"]+[Opening "Ruy Lopez"]+[Variation "closed, Breyer, Simagin variation"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Nb8 10. d4 Nbd7 11. Nh4 *++[ECO "C96"]+[Opening "Ruy Lopez"]+[Variation "closed (8...Na5)"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Na5 10. Bc2 *++[ECO "C96"]+[Opening "Ruy Lopez"]+[Variation "closed, Rossolimo defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Na5 10. Bc2 c6 11. d4 Qc7 *++[ECO "C96"]+[Opening "Ruy Lopez"]+[Variation "closed (10...c5)"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Na5 10. Bc2 c5 *++[ECO "C96"]+[Opening "Ruy Lopez"]+[Variation "closed, Borisenko defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Nc6 *++[ECO "C96"]+[Opening "Ruy Lopez"]+[Variation "closed, Keres (...Nd7) defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Nd7 *++[ECO "C97"]+[Opening "Ruy Lopez"]+[Variation "closed, Chigorin defence"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 *++[ECO "C97"]+[Opening "Ruy Lopez"]+[Variation "closed, Chigorin, Yugoslav system"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Bd7 13. Nf1 Rfe8 14. Ne3 g6+*++[ECO "C98"]+[Opening "Ruy Lopez"]+[Variation "closed, Chigorin, 12...Nc6"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 *++[ECO "C98"]+[Opening "Ruy Lopez"]+[Variation "closed, Chigorin, Rauzer attack"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 13. dxc5 *++[ECO "C99"]+[Opening "Ruy Lopez"]+[Variation "closed, Chigorin, 12...c5d4"]++1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8.+c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 cxd4 13. cxd4 *++[ECO "D00"]+[Opening "Queen's pawn game"]++1. d4 d5 *++[ECO "D00"]+[Opening "Queen's pawn, Mason variation"]++1. d4 d5 2. Bf4 *++[ECO "D00"]+[Opening "Queen's pawn, Mason variation, Steinitz counter-gambit"]++1. d4 d5 2. Bf4 c5 *++[ECO "D00"]+[Opening "Levitsky attack (Queen's bishop attack)"]++1. d4 d5 2. Bg5 *++[ECO "D00"]+[Opening "Blackmar gambit"]++1. d4 d5 2. e4 *++[ECO "D00"]+[Opening "Queen's pawn"]+[Variation "stonewall attack"]++1. d4 d5 2. e3 Nf6 3. Bd3 *++[ECO "D00"]+[Opening "Queen's pawn"]+[Variation "Chigorin variation"]++1. d4 d5 2. Nc3 *++[ECO "D00"]+[Opening "Queen's pawn"]+[Variation "Anti-Veresov"]++1. d4 d5 2. Nc3 Bg4 *++[ECO "D00"]+[Opening "Blackmar-Diemer gambit"]++1. d4 d5 2. Nc3 Nf6 3. e4 *++[ECO "D00"]+[Opening "Blackmar-Diemer"]+[Variation "Euwe defence"]++1. d4 d5 2. Nc3 Nf6 3. e4 dxe4 4. f3 exf3 5. Nxf3 e6 *++[ECO "D00"]+[Opening "Blackmar-Diemer"]+[Variation "Lemberg counter-gambit"]++1. d4 d5 2. Nc3 Nf6 3. e4 e5 *++[ECO "D01"]+[Opening "Richter-Veresov attack"]++1. d4 d5 2. Nc3 Nf6 3. Bg5 *++[ECO "D01"]+[Opening "Richter-Veresov attack, Veresov variation"]++1. d4 d5 2. Nc3 Nf6 3. Bg5 Bf5 4. Bxf6 *++[ECO "D01"]+[Opening "Richter-Veresov attack, Richter variation"]++1. d4 d5 2. Nc3 Nf6 3. Bg5 Bf5 4. f3 *++[ECO "D02"]+[Opening "Queen's pawn game"]++1. d4 d5 2. Nf3 *++[ECO "D02"]+[Opening "Queen's pawn game, Chigorin variation"]++1. d4 d5 2. Nf3 Nc6 *++[ECO "D02"]+[Opening "Queen's pawn game, Krause variation"]++1. d4 d5 2. Nf3 c5 *++[ECO "D02"]+[Opening "Queen's pawn game"]++1. d4 d5 2. Nf3 Nf6 *++[ECO "D02"]+[Opening "Queen's bishop game"]++1. d4 d5 2. Nf3 Nf6 3. Bf4 *++[ECO "D03"]+[Opening "Torre attack (Tartakower variation)"]++1. d4 d5 2. Nf3 Nf6 3. Bg5 *++[ECO "D04"]+[Opening "Queen's pawn game"]++1. d4 d5 2. Nf3 Nf6 3. e3 *++[ECO "D05"]+[Opening "Queen's pawn game"]++1. d4 d5 2. Nf3 Nf6 3. e3 e6 *++[ECO "D05"]+[Opening "Queen's pawn game, Zukertort variation"]++1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Nbd2 c5 5. b3 *++[ECO "D05"]+[Opening "Queen's pawn game"]++1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 *++[ECO "D05"]+[Opening "Queen's pawn game, Rubinstein (Colle-Zukertort) variation"]++1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 c5 5. b3 *++[ECO "D05"]+[Opening "Colle system"]++1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 c5 5. c3 *++[ECO "D06"]+[Opening "Queen's Gambit"]++1. d4 d5 2. c4 *++[ECO "D06"]+[Opening "QGD"]+[Variation "Grau (Sahovic) defence"]++1. d4 d5 2. c4 Bf5 *++[ECO "D06"]+[Opening "QGD"]+[Variation "Marshall defence"]++1. d4 d5 2. c4 Nf6 *++[ECO "D06"]+[Opening "QGD"]+[Variation "symmetrical (Austrian) defence"]++1. d4 d5 2. c4 c5 *++[ECO "D07"]+[Opening "QGD"]+[Variation "Chigorin defence"]++1. d4 d5 2. c4 Nc6 *++[ECO "D07"]+[Opening "QGD"]+[Variation "Chigorin defence, Janowski variation"]++1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. Nf3 *++[ECO "D08"]+[Opening "QGD"]+[Variation "Albin counter-gambit"]++1. d4 d5 2. c4 e5 *++[ECO "D08"]+[Opening "QGD"]+[Variation "Albin counter-gambit, Lasker trap"]++1. d4 d5 2. c4 e5 3. dxe5 d4 4. e3 Bb4+ 5. Bd2 dxe3 *++[ECO "D08"]+[Opening "QGD"]+[Variation "Albin counter-gambit"]++1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 *++[ECO "D08"]+[Opening "QGD"]+[Variation "Albin counter-gambit, Alapin variation"]++1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 *++[ECO "D08"]+[Opening "QGD"]+[Variation "Albin counter-gambit, Krenosz variation"]++1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Bg4 6. h3 Bxf3 7. Nxf3 Bb4++8. Bd2 Qe7 *++[ECO "D08"]+[Opening "QGD"]+[Variation "Albin counter-gambit, Janowski variation"]++1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 f6 *++[ECO "D08"]+[Opening "QGD"]+[Variation "Albin counter-gambit, Balogh variation"]++1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Qe7 *++[ECO "D09"]+[Opening "QGD"]+[Variation "Albin counter-gambit, 5.g3"]++1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 *++[ECO "D10"]+[Opening "QGD Slav defence"]++1. d4 d5 2. c4 c6 *++[ECO "D10"]+[Opening "QGD Slav defence, Alekhine variation"]++1. d4 d5 2. c4 c6 3. Nc3 dxc4 4. e4 *++[ECO "D10"]+[Opening "QGD Slav"]+[Variation "Winawer counter-gambit"]++1. d4 d5 2. c4 c6 3. Nc3 e5 *++[ECO "D10"]+[Opening "QGD Slav defence"]+[Variation "exchange variation"]++1. d4 d5 2. c4 c6 3. cxd5 *++[ECO "D11"]+[Opening "QGD Slav"]+[Variation "3.Nf3"]++1. d4 d5 2. c4 c6 3. Nf3 *++[ECO "D11"]+[Opening "QGD Slav"]+[Variation "Breyer variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nbd2 *++[ECO "D11"]+[Opening "QGD Slav"]+[Variation "4.e3"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 *++[ECO "D12"]+[Opening "QGD Slav"]+[Variation "4.e3 Bf5"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 *++[ECO "D12"]+[Opening "QGD Slav"]+[Variation "Landau variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Qb3 Qc8 7. Bd2 e6 8.+Na3 *++[ECO "D12"]+[Opening "QGD Slav"]+[Variation "exchange variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3 *++[ECO "D12"]+[Opening "QGD Slav"]+[Variation "Amsterdam variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3 e6 7. Ne5 Nfd7 *++[ECO "D13"]+[Opening "QGD Slav"]+[Variation "exchange variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 *++[ECO "D14"]+[Opening "QGD Slav"]+[Variation "exchange variation, 6.Bf4 Bf5"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 *++[ECO "D14"]+[Opening "QGD Slav"]+[Variation "exchange, Trifunovic variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 7. e3 e6 8.+Qb3 Bb4 *++[ECO "D15"]+[Opening "QGD Slav"]+[Variation "4.Nc3"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 *++[ECO "D15"]+[Opening "QGD Slav"]+[Variation "Suechting variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 Qb6 *++[ECO "D15"]+[Opening "QGD Slav"]+[Variation "Schlechter variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 g6 *++[ECO "D15"]+[Opening "QGD Slav accepted"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 *++[ECO "D15"]+[Opening "QGD Slav"]+[Variation "5.e3 (Alekhine variation)"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e3 *++[ECO "D15"]+[Opening "QGD Slav"]+[Variation "Slav gambit"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4 *++[ECO "D15"]+[Opening "QGD Slav"]+[Variation "Tolush-Geller gambit"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4 b5 6. e5 *++[ECO "D16"]+[Opening "QGD Slav accepted"]+[Variation "Alapin variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 *++[ECO "D16"]+[Opening "QGD Slav"]+[Variation "Smyslov variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Na6 6. e4 Bg4 *++[ECO "D16"]+[Opening "QGD Slav"]+[Variation "Soultanbeieff variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 e6 *++[ECO "D16"]+[Opening "QGD Slav"]+[Variation "Steiner variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bg4 *++[ECO "D17"]+[Opening "QGD Slav"]+[Variation "Czech defence"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 *++[ECO "D17"]+[Opening "QGD Slav"]+[Variation "Krause attack"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 *++[ECO "D17"]+[Opening "QGD Slav"]+[Variation "Carlsbad variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7+8. g3 e5 *++[ECO "D17"]+[Opening "QGD Slav"]+[Variation "Wiesbaden variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 e6 *++[ECO "D18"]+[Opening "QGD Slav"]+[Variation "Dutch variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 *++[ECO "D18"]+[Opening "QGD Slav"]+[Variation "Dutch, Lasker variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 Na6 *++[ECO "D19"]+[Opening "QGD Slav"]+[Variation "Dutch variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8.+O-O *++[ECO "D19"]+[Opening "QGD Slav"]+[Variation "Dutch variation, main line"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8.+O-O O-O 9. Qe2 *++[ECO "D19"]+[Opening "QGD Slav"]+[Variation "Dutch, Saemisch variation"]++1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8.+O-O O-O 9. Qe2 Ne4 10. g4 *++[ECO "D20"]+[Opening "Queen's gambit accepted"]++1. d4 d5 2. c4 dxc4 *++[ECO "D20"]+[Opening "QGA"]+[Variation "3.e4"]++1. d4 d5 2. c4 dxc4 3. e4 *++[ECO "D20"]+[Opening "QGA"]+[Variation "Linares variation"]++1. d4 d5 2. c4 dxc4 3. e4 c5 4. d5 Nf6 5. Nc3 b5 *++[ECO "D20"]+[Opening "QGA"]+[Variation "Schwartz defence"]++1. d4 d5 2. c4 dxc4 3. e4 f5 *++[ECO "D21"]+[Opening "QGA"]+[Variation "3.Nf3"]++1. d4 d5 2. c4 dxc4 3. Nf3 *++[ECO "D21"]+[Opening "QGA"]+[Variation "Ericson variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 b5 *++[ECO "D21"]+[Opening "QGA"]+[Variation "Alekhine defense, Borisenko-Furman variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e4 *++[ECO "D22"]+[Opening "QGA"]+[Variation "Alekhine defence"]++1. d4 d5 2. c4 dxc4 3. Nf3 a6 *++[ECO "D22"]+[Opening "QGA"]+[Variation "Alekhine defence, Alatortsev variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 Bg4 5. Bxc4 e6 6. d5 *++[ECO "D22"]+[Opening "QGA"]+[Variation "Haberditz variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 b5 *++[ECO "D23"]+[Opening "Queen's gambit accepted"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 *++[ECO "D23"]+[Opening "QGA"]+[Variation "Mannheim variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Qa4+ *++[ECO "D24"]+[Opening "QGA, 4.Nc3"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 *++[ECO "D24"]+[Opening "QGA, Bogolyubov variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4 *++[ECO "D25"]+[Opening "QGA, 4.e3"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 *++[ECO "D25"]+[Opening "QGA, Smyslov variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 g6 *++[ECO "D25"]+[Opening "QGA, Janowsky-Larsen variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 *++[ECO "D25"]+[Opening "QGA, Flohr variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Be6 *++[ECO "D26"]+[Opening "QGA"]+[Variation "4...e6"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 *++[ECO "D26"]+[Opening "QGA"]+[Variation "classical variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 *++[ECO "D26"]+[Opening "QGA"]+[Variation "classical, Furman variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. Qe2 a6 7. dxc5 Bxc5 +8. O-O Nc6 9. e4 b5 10. e5 *++[ECO "D26"]+[Opening "QGA"]+[Variation "classical variation, 6.O-O"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O *++[ECO "D26"]+[Opening "QGA"]+[Variation "classical, Steinitz variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O cxd4 *++[ECO "D27"]+[Opening "QGA"]+[Variation "classical, 6...a6"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 *++[ECO "D27"]+[Opening "QGA"]+[Variation "classical, Rubinstein variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. a4 *++[ECO "D27"]+[Opening "QGA"]+[Variation "classical, Geller variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. e4 *++[ECO "D28"]+[Opening "QGA"]+[Variation "classical, 7.Qe2"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 *++[ECO "D28"]+[Opening "QGA"]+[Variation "classical, 7...b5"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 *++[ECO "D28"]+[Opening "QGA"]+[Variation "classical, Flohr variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. +Bb3 Nc6 9. Rd1 c4 10. Bc2 Nb4 11. Nc3 Nxc2 12. Qxc2 Bb7 13. d5 Qc7 *++[ECO "D29"]+[Opening "QGA"]+[Variation "classical, 8...Bb7"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. +Bb3 Bb7 *++[ECO "D29"]+[Opening "QGA"]+[Variation "classical, Smyslov variation"]++1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. +Bb3 Bb7 9. Rd1 Nbd7 10. Nc3 Bd6 *++[ECO "D30"]+[Opening "Queen's gambit declined"]++1. d4 d5 2. c4 e6 *++[ECO "D30"]+[Opening "QGD Slav"]++1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2 *++[ECO "D30"]+[Opening "QGD"]+[Variation "Stonewall variation"]++1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2 Ne4 6. Bd3 f5 *++[ECO "D30"]+[Opening "QGD Slav"]++1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2 Nbd7 *++[ECO "D30"]+[Opening "QGD Slav"]+[Variation "Semmering variation"]++1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2 Nbd7 6. Bd3 c5 *++[ECO "D30"]+[Opening "QGD"]+[Variation "Spielmann variation"]++1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2 g6 *++[ECO "D30"]+[Opening "QGD"]++1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Bg5 *++[ECO "D30"]+[Opening "QGD"]+[Variation "Capablanca variation"]++1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nbd2 *++[ECO "D30"]+[Opening "QGD"]+[Variation "Vienna variation"]++1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Bg5 Bb4+ *++[ECO "D30"]+[Opening "QGD"]+[Variation "Capablanca-Duras variation"]++1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Bg5 h6 *++[ECO "D30"]+[Opening "QGD"]+[Variation "Hastings variation"]++1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Bg5 h6 5. Bxf6 Qxf6 6. Nc3 c6 7. Qb3 *++[ECO "D31"]+[Opening "QGD"]+[Variation "3.Nc3"]++1. d4 d5 2. c4 e6 3. Nc3 *++[ECO "D31"]+[Opening "QGD"]+[Variation "Janowski variation"]++1. d4 d5 2. c4 e6 3. Nc3 a6 *++[ECO "D31"]+[Opening "QGD"]+[Variation "Alapin variation"]++1. d4 d5 2. c4 e6 3. Nc3 b6 *++[ECO "D31"]+[Opening "QGD"]+[Variation "Charousek (Petrosian) variation"]++1. d4 d5 2. c4 e6 3. Nc3 Be7 *++[ECO "D31"]+[Opening "QGD"]+[Variation "semi-Slav"]++1. d4 d5 2. c4 e6 3. Nc3 c6 *++[ECO "D31"]+[Opening "QGD"]+[Variation "semi-Slav, Noteboom variation"]++1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 *++[ECO "D31"]+[Opening "QGD"]+[Variation "semi-Slav, Koomen variation"]++1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 Qe7 *++[ECO "D31"]+[Opening "QGD"]+[Variation "semi-Slav, Junge variation"]++1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 Qb6 *++[ECO "D31"]+[Opening "QGD"]+[Variation "semi-Slav, Abrahams variation"]++1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5 *++[ECO "D31"]+[Opening "QGD"]+[Variation "semi-Slav, Marshall gambit"]++1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 *++[ECO "D32"]+[Opening "QGD"]+[Variation "Tarrasch defence"]++1. d4 d5 2. c4 e6 3. Nc3 c5 *++[ECO "D32"]+[Opening "QGD"]+[Variation "Tarrasch, von Hennig-Schara gambit"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4 *++[ECO "D32"]+[Opening "QGD"]+[Variation "Tarrasch defence, 4.cd ed"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 *++[ECO "D32"]+[Opening "QGD"]+[Variation "Tarrasch defence, Tarrasch gambit"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. dxc5 d4 6. Na4 b5 *++[ECO "D32"]+[Opening "QGD"]+[Variation "Tarrasch defence, Marshall gambit"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. e4 *++[ECO "D32"]+[Opening "QGD"]+[Variation "Tarrasch defence"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 *++[ECO "D33"]+[Opening "QGD"]+[Variation "Tarrasch, Schlechter-Rubinstein system"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 *++[ECO "D33"]+[Opening "QGD"]+[Variation "Tarrasch, Folkestone (Swedish) variation"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 c4 *++[ECO "D33"]+[Opening "QGD"]+[Variation "Tarrasch, Schlechter-Rubinstein system, Rey Ardid variation"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 c4 7. e4 *++[ECO "D33"]+[Opening "QGD"]+[Variation "Tarrasch, Prague variation"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 *++[ECO "D33"]+[Opening "QGD"]+[Variation "Tarrasch, Wagner variation"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Bg4 *++[ECO "D34"]+[Opening "QGD"]+[Variation "Tarrasch, Prague variation, 7...Be7"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 *++[ECO "D34"]+[Opening "QGD"]+[Variation "Tarrasch, Prague variation, Normal position"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8.+O-O O-O *++[ECO "D34"]+[Opening "QGD"]+[Variation "Tarrasch, Reti variation"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8.+O-O O-O 9. dxc5 Bxc5 10. Na4 *++[ECO "D34"]+[Opening "QGD"]+[Variation "Tarrasch, Prague variation, 9.Bg5"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8.+O-O O-O 9. Bg5 *++[ECO "D34"]+[Opening "QGD"]+[Variation "Tarrasch, Bogolyubov variation"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8.+O-O O-O 9. Bg5 Be6 10. Rc1 c4 *++[ECO "D34"]+[Opening "QGD"]+[Variation "Tarrasch, Stoltz variation"]++1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8.+O-O O-O 9. Bg5 Be6 10. Rc1 b6 *++[ECO "D35"]+[Opening "QGD"]+[Variation "3...Nf6"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 *++[ECO "D35"]+[Opening "QGD"]+[Variation "Harrwitz attack"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bf4 *++[ECO "D35"]+[Opening "QGD"]+[Variation "exchange variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 *++[ECO "D35"]+[Opening "QGD"]+[Variation "exchange, Saemisch variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Nf3 Nbd7 6. Bf4 *++[ECO "D35"]+[Opening "QGD"]+[Variation "exchange, positional line"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 *++[ECO "D35"]+[Opening "QGD"]+[Variation "exchange, chameleon variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 Nbd7+8. Qc2 Re8 9. Nge2 Nf8 10. O-O-O *++[ECO "D35"]+[Opening "QGD"]+[Variation "exchange, positional line, 5...c6"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 *++[ECO "D36"]+[Opening "QGD"]+[Variation "exchange, positional line, 6.Qc2"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 6. Qc2 *++[ECO "D37"]+[Opening "QGD"]+[Variation "4.Nf3"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 *++[ECO "D37"]+[Opening "QGD"]+[Variation "classical variation (5.Bf4)"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 *++[ECO "D38"]+[Opening "QGD"]+[Variation "Ragozin variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4 *++[ECO "D39"]+[Opening "QGD"]+[Variation "Ragozin, Vienna variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4 5. Bg5 dxc4 *++[ECO "D40"]+[Opening "QGD"]+[Variation "Semi-Tarrasch defence"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 *++[ECO "D40"]+[Opening "QGD"]+[Variation "Semi-Tarrasch, symmetrical variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O *++[ECO "D40"]+[Opening "QGD"]+[Variation "Semi-Tarrasch, Levenfish variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O 8. +Qe2 Qe7 9. dxc5 Bxc5 10. e4 *++[ECO "D40"]+[Opening "QGD"]+[Variation "Semi-Tarrasch defence, Pillsbury variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. Bg5 *++[ECO "D41"]+[Opening "QGD"]+[Variation "Semi-Tarrasch, 5.cd"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 *++[ECO "D41"]+[Opening "QGD"]+[Variation "Semi-Tarrasch, Kmoch variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4+8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bb5 *++[ECO "D41"]+[Opening "QGD"]+[Variation "Semi-Tarrasch, San Sebastian variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4+8. cxd4 Bb4+ 9. Bd2 Qa5 *++[ECO "D41"]+[Opening "QGD"]+[Variation "Semi-Tarrasch with e3"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e3 *++[ECO "D42"]+[Opening "QGD"]+[Variation "Semi-Tarrasch, 7.Bd3"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3 *++[ECO "D43"]+[Opening "QGD semi-Slav"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 *++[ECO "D43"]+[Opening "QGD semi-Slav"]+[Variation "Hastings variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 h6 6. Bxf6 Qxf6 7. Qb3 *++[ECO "D44"]+[Opening "QGD semi-Slav"]+[Variation "5.Bg5 dc"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 *++[ECO "D44"]+[Opening "QGD semi-Slav"]+[Variation "Botvinnik system (anti-Meran)"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 6. e4 *++[ECO "D44"]+[Opening "QGD semi-Slav"]+[Variation "Ekstrom variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4+g5 9. exf6 gxh4 10. Ne5 *++[ECO "D44"]+[Opening "QGD semi-Slav"]+[Variation "anti-Meran gambit"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4+g5 9. Nxg5 *++[ECO "D44"]+[Opening "QGD semi-Slav"]+[Variation "anti-Meran, Lilienthal variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4+g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. g3 *++[ECO "D44"]+[Opening "QGD semi-Slav"]+[Variation "anti-Meran, Szabo variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4+g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. Qf3 *++[ECO "D44"]+[Opening "QGD semi-Slav"]+[Variation "anti-Meran, Alatortsev system"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4+g5 9. Nxg5 Nd5 *++[ECO "D45"]+[Opening "QGD semi-Slav"]+[Variation "5.e3"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 *++[ECO "D45"]+[Opening "QGD semi-Slav"]+[Variation "stonewall defence"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Ne4 6. Bd3 f5 *++[ECO "D45"]+[Opening "QGD semi-Slav"]+[Variation "accelerated Meran (Alekhine variation)"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 a6 *++[ECO "D45"]+[Opening "QGD semi-Slav"]+[Variation "5...Nd7"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 *++[ECO "D45"]+[Opening "QGD semi-Slav"]+[Variation "Stoltz variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Qc2 *++[ECO "D45"]+[Opening "QGD semi-Slav"]+[Variation "Rubinstein (anti-Meran) system"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Ne5 *++[ECO "D46"]+[Opening "QGD semi-Slav"]+[Variation "6.Bd3"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 *++[ECO "D46"]+[Opening "QGD semi-Slav"]+[Variation "Bogolyubov variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 Be7 *++[ECO "D46"]+[Opening "QGD semi-Slav"]+[Variation "Romih variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 Bb4 *++[ECO "D46"]+[Opening "QGD semi-Slav"]+[Variation "Chigorin defence"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 Bd6 *++[ECO "D47"]+[Opening "QGD semi-Slav"]+[Variation "7.Bc4"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 *++[ECO "D47"]+[Opening "QGD semi-Slav"]+[Variation "Meran variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 *++[ECO "D47"]+[Opening "QGD semi-Slav"]+[Variation "neo-Meran (Lundin variation)"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 b4 *++[ECO "D47"]+[Opening "QGD semi-Slav"]+[Variation "Meran, Wade variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 Bb7 *++[ECO "D48"]+[Opening "QGD semi-Slav"]+[Variation "Meran, 8...a6"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 a6 *++[ECO "D48"]+[Opening "QGD semi-Slav"]+[Variation "Meran, Pirc variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 a6 9. e4 b4 *++[ECO "D48"]+[Opening "QGD semi-Slav"]+[Variation "Meran"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 a6 9. e4 c5 *++[ECO "D48"]+[Opening "QGD semi-Slav"]+[Variation "Meran, Reynolds' variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 a6 9. e4 c5 10. d5 *++[ECO "D48"]+[Opening "QGD semi-Slav"]+[Variation "Meran, old main line"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 a6 9. e4 c5 10. e5 *++[ECO "D49"]+[Opening "QGD semi-Slav"]+[Variation "Meran, Blumenfeld variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 *++[ECO "D49"]+[Opening "QGD semi-Slav"]+[Variation "Meran, Rabinovich variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Ng4 *++[ECO "D49"]+[Opening "QGD semi-Slav"]+[Variation "Meran, Sozin variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 *++[ECO "D49"]+[Opening "QGD semi-Slav"]+[Variation "Meran, Stahlberg variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. Qf3 *++[ECO "D49"]+[Opening "QGD semi-Slav"]+[Variation "Meran, Sozin variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. O-O *++[ECO "D49"]+[Opening "QGD semi-Slav"]+[Variation "Meran, Rellstab attack"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8.+Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. O-O Qd5 14. Qe2+Ba6 15. Bg5 *++[ECO "D50"]+[Opening "QGD"]+[Variation "4.Bg5"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 *++[ECO "D50"]+[Opening "QGD"]+[Variation "Been-Koomen variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 *++[ECO "D50"]+[Opening "QGD"]+[Variation "Semi-Tarrasch, Krause variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Nxd4 e5 7. Ndb5 a6 8.+Qa4 *++[ECO "D50"]+[Opening "QGD"]+[Variation "Semi-Tarrasch, Primitive Pillsbury variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Qxd4 *++[ECO "D50"]+[Opening "QGD"]+[Variation "Semi-Tarrasch"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5 *++[ECO "D50"]+[Opening "QGD"]+[Variation "Canal (Venice) variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5 Qb6 *++[ECO "D51"]+[Opening "QGD"]+[Variation "4.Bg5 Nbd7"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 *++[ECO "D51"]+[Opening "QGD"]+[Variation "Rochlin variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. Rc1 Qa5 7. Bd2 *++[ECO "D51"]+[Opening "QGD"]+[Variation "Alekhine variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. e4 *++[ECO "D51"]+[Opening "QGD"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 *++[ECO "D51"]+[Opening "QGD"]+[Variation "Manhattan variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 Bb4 *++[ECO "D51"]+[Opening "QGD"]+[Variation "5...c6"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 *++[ECO "D51"]+[Opening "QGD"]+[Variation "Capablanca anti-Cambridge Springs variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. a3 *++[ECO "D52"]+[Opening "QGD"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 *++[ECO "D52"]+[Opening "QGD"]+[Variation "Cambridge Springs defence"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 *++[ECO "D52"]+[Opening "QGD"]+[Variation "Cambridge Springs defence, Bogoljubow variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Nd2 Bb4 8.+Qc2 *++[ECO "D52"]+[Opening "QGD"]+[Variation "Cambridge Springs defence, Argentine variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Nd2 Bb4 8.+Qc2 O-O 9. Bh4 *++[ECO "D52"]+[Opening "QGD"]+[Variation "Cambridge Springs defence, Rubinstein variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Nd2 dxc4 *++[ECO "D52"]+[Opening "QGD"]+[Variation "Cambridge Springs defence, Capablanca variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Bxf6 *++[ECO "D52"]+[Opening "QGD"]+[Variation "Cambridge Springs defence, 7.cd"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. cxd5 *++[ECO "D52"]+[Opening "QGD"]+[Variation "Cambridge Springs defence, Yugoslav variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. cxd5 Nxd5 *++[ECO "D53"]+[Opening "QGD"]+[Variation "4.Bg5 Be7"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 *++[ECO "D53"]+[Opening "QGD"]+[Variation "Lasker variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 Ne4 *++[ECO "D53"]+[Opening "QGD"]+[Variation "4.Bg5 Be7, 5.e3 O-O"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O *++[ECO "D54"]+[Opening "QGD"]+[Variation "Anti-neo-orthodox variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Rc1 *++[ECO "D55"]+[Opening "QGD"]+[Variation "6.Nf3"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 *++[ECO "D55"]+[Opening "QGD"]+[Variation "Pillsbury attack"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 b6 7. Bd3 Bb7 8. +cxd5 exd5 9. Ne5 *++[ECO "D55"]+[Opening "QGD"]+[Variation "Neo-orthodox variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 *++[ECO "D55"]+[Opening "QGD"]+[Variation "Neo-orthodox variation, 7.Bxf6"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bxf6 *++[ECO "D55"]+[Opening "QGD"]+[Variation "Petrosian variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bxf6 Bxf6 8.+Rc1 c6 9. Bd3 Nd7 10. O-O dxc4 11. Bxc4 *++[ECO "D55"]+[Opening "QGD"]+[Variation "Neo-orthodox variation, 7.Bh4"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 *++[ECO "D56"]+[Opening "QGD"]+[Variation "Lasker defence"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 *++[ECO "D56"]+[Opening "QGD"]+[Variation "Lasker defence, Teichmann variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. +Bxe7 Qxe7 9. Qc2 *++[ECO "D56"]+[Opening "QGD"]+[Variation "Lasker defence, Russian variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. +Bxe7 Qxe7 9. Qc2 Nf6 10. Bd3 dxc4 11. Bxc4 c5 12. O-O Nc6 13. Rfd1 Bd7 *++[ECO "D57"]+[Opening "QGD"]+[Variation "Lasker defence, main line"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. +Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 *++[ECO "D57"]+[Opening "QGD"]+[Variation "Lasker defence, Bernstein variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. +Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 exd5 11. Qb3 Qd6 *++[ECO "D58"]+[Opening "QGD"]+[Variation "Tartakower (Makagonov-Bondarevsky) system"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 b6 *++[ECO "D59"]+[Opening "QGD"]+[Variation "Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 b6 8. +cxd5 Nxd5 *++[ECO "D59"]+[Opening "QGD"]+[Variation "Tartakower variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 b6 8. +cxd5 Nxd5 9. Bxe7 Qxe7 10. Nxd5 exd5 11. Rc1 Be6 *++[ECO "D60"]+[Opening "QGD"]+[Variation "Orthodox defence"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 *++[ECO "D60"]+[Opening "QGD"]+[Variation "Orthodox defence, Botvinnik variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Bd3 *++[ECO "D60"]+[Opening "QGD"]+[Variation "Orthodox defence, Rauzer variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qb3 *++[ECO "D61"]+[Opening "QGD"]+[Variation "Orthodox defence, Rubinstein variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qc2 *++[ECO "D62"]+[Opening "QGD"]+[Variation "Orthodox defence, 7.Qc2 c5, 8.cd (Rubinstein)"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qc2 c5 8.+cxd5 *++[ECO "D63"]+[Opening "QGD"]+[Variation "Orthodox defence, 7.Rc1"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 *++[ECO "D63"]+[Opening "QGD"]+[Variation "Orthodox defence, Pillsbury attack"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 b6 8.+cxd5 exd5 9. Bd3 *++[ECO "D63"]+[Opening "QGD"]+[Variation "Orthodox defence, Capablanca variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 b6 8.+cxd5 exd5 9. Bb5 *++[ECO "D63"]+[Opening "QGD"]+[Variation "Orthodox defence, Swiss (Henneberger) variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 a6 *++[ECO "D63"]+[Opening "QGD"]+[Variation "Orthodox defence, Swiss, Karlsbad variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 a6 8.+cxd5 *++[ECO "D63"]+[Opening "QGD"]+[Variation "Orthodox defence"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 *++[ECO "D64"]+[Opening "QGD"]+[Variation "Orthodox defence, Rubinstein attack (with Rc1)"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Qc2 *++[ECO "D64"]+[Opening "QGD"]+[Variation "Orthodox defence, Rubinstein attack, Wolf variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Qc2 Ne4 *++[ECO "D64"]+[Opening "QGD"]+[Variation "Orthodox defence, Rubinstein attack, Karlsbad variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Qc2 a6 *++[ECO "D64"]+[Opening "QGD"]+[Variation "Orthodox defence, Rubinstein attack, Gruenfeld variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Qc2 a6 9. a3 *++[ECO "D65"]+[Opening "QGD"]+[Variation "Orthodox defence, Rubinstein attack, main line"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Qc2 a6 9. cxd5 *++[ECO "D66"]+[Opening "QGD"]+[Variation "Orthodox defence, Bd3 line"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Bd3 *++[ECO "D66"]+[Opening "QGD"]+[Variation "Orthodox defence, Bd3 line, fianchetto variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Bd3 dxc4 9. Bxc4 b5 *++[ECO "D67"]+[Opening "QGD"]+[Variation "Orthodox defence, Bd3 line, Capablanca freeing manoevre"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Bd3 dxc4 9. Bxc4 Nd5 *++[ECO "D67"]+[Opening "QGD"]+[Variation "Orthodox defence, Bd3 line, Janowski variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Bd3 dxc4 9. Bxc4 Nd5 10. h4 *++[ECO "D67"]+[Opening "QGD"]+[Variation "Orthodox defence, Bd3 line"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 *++[ECO "D67"]+[Opening "QGD"]+[Variation "Orthodox defence, Bd3 line, Alekhine variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. Ne4 *++[ECO "D67"]+[Opening "QGD"]+[Variation "Orthodox defence, Bd3 line, 11.O-O"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O *++[ECO "D68"]+[Opening "QGD"]+[Variation "Orthodox defence, classical variation"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 *++[ECO "D68"]+[Opening "QGD"]+[Variation "Orthodox defence, classical, 13.d1b1 (Maroczy)"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. Qb1 *++[ECO "D68"]+[Opening "QGD"]+[Variation "Orthodox defence, classical, 13.d1c2 (Vidmar)"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. Qc2 *++[ECO "D69"]+[Opening "QGD"]+[Variation "Orthodox defence, classical, 13.de"]++1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8.+Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. dxe5 Nxe5 +14. Nxe5 Qxe5 *++[ECO "D70"]+[Opening "Neo-Gruenfeld defence"]++1. d4 Nf6 2. c4 g6 3. f3 d5 *++[ECO "D70"]+[Opening "Neo-Gruenfeld (Kemeri) defence"]++1. d4 Nf6 2. c4 g6 3. g3 d5 *++[ECO "D71"]+[Opening "Neo-Gruenfeld, 5.cd"]++1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. cxd5 Nxd5 *++[ECO "D72"]+[Opening "Neo-Gruenfeld, 5.cd, main line"]++1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. cxd5 Nxd5 6. e4 Nb6 7. Ne2 *++[ECO "D73"]+[Opening "Neo-Gruenfeld, 5.Nf3"]++1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 *++[ECO "D74"]+[Opening "Neo-Gruenfeld, 6.cd Nxd5, 7.O-O"]++1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. cxd5 Nxd5 7. O-O *++[ECO "D75"]+[Opening "Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3"]++1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. cxd5 Nxd5 7. O-O c5 8.+Nc3 *++[ECO "D75"]+[Opening "Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.dc"]++1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. cxd5 Nxd5 7. O-O c5 8.+dxc5 *++[ECO "D76"]+[Opening "Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb6"]++1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. cxd5 Nxd5 7. O-O Nb6 *++[ECO "D77"]+[Opening "Neo-Gruenfeld, 6.O-O"]++1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. O-O *++[ECO "D78"]+[Opening "Neo-Gruenfeld, 6.O-O c6"]++1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. O-O c6 *++[ECO "D79"]+[Opening "Neo-Gruenfeld, 6.O-O, main line"]++1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. O-O c6 7. cxd5 cxd5 *++[ECO "D80"]+[Opening "Gruenfeld defence"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 *++[ECO "D80"]+[Opening "Gruenfeld"]+[Variation "Spike gambit"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. g4 *++[ECO "D80"]+[Opening "Gruenfeld"]+[Variation "Stockholm variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 *++[ECO "D80"]+[Opening "Gruenfeld"]+[Variation "Lundin variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 Ne4 5. Nxe4 dxe4 6. Qd2 c5 *++[ECO "D81"]+[Opening "Gruenfeld"]+[Variation "Russian variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qb3 *++[ECO "D82"]+[Opening "Gruenfeld"]+[Variation "4.Bf4"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 *++[ECO "D83"]+[Opening "Gruenfeld"]+[Variation "Gruenfeld gambit"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O *++[ECO "D83"]+[Opening "Gruenfeld"]+[Variation "Gruenfeld gambit, Capablanca variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1 *++[ECO "D83"]+[Opening "Gruenfeld"]+[Variation "Gruenfeld gambit, Botvinnik variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1 c5 7. dxc5 Be6 *++[ECO "D84"]+[Opening "Gruenfeld"]+[Variation "Gruenfeld gambit accepted"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. cxd5 Nxd5 7. Nxd5 Qxd5+8. Bxc7 *++[ECO "D85"]+[Opening "Gruenfeld"]+[Variation "exchange variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 *++[ECO "D85"]+[Opening "Gruenfeld"]+[Variation "modern exchange variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 *++[ECO "D86"]+[Opening "Gruenfeld"]+[Variation "exchange, classical variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 *++[ECO "D86"]+[Opening "Gruenfeld"]+[Variation "exchange, Larsen variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O+8. Ne2 Qd7 9. O-O b6 *++[ECO "D86"]+[Opening "Gruenfeld"]+[Variation "exchange, Simagin's lesser variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O+8. Ne2 b6 *++[ECO "D86"]+[Opening "Gruenfeld"]+[Variation "exchange, Simagin's improved variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O+8. Ne2 Nc6 *++[ECO "D87"]+[Opening "Gruenfeld"]+[Variation "exchange, Spassky variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O+8. Ne2 c5 *++[ECO "D87"]+[Opening "Gruenfeld"]+[Variation "exchange, Seville variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O+8. Ne2 c5 9. O-O Nc6 10. Be3 Bg4 11. f3 Na5 12. Bxf7+ *++[ECO "D88"]+[Opening "Gruenfeld"]+[Variation "Spassky variation, main line, 10...cd, 11.cd"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O+8. Ne2 c5 9. O-O Nc6 10. Be3 cxd4 11. cxd4 *++[ECO "D89"]+[Opening "Gruenfeld"]+[Variation "Spassky variation, main line, 13.Bd3"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O+8. Ne2 c5 9. O-O Nc6 10. Be3 cxd4 11. cxd4 Bg4 12. f3 Na5 13. Bd3 Be6 *++[ECO "D89"]+[Opening "Gruenfeld"]+[Variation "exchange, Sokolsky variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O+8. Ne2 c5 9. O-O Nc6 10. Be3 cxd4 11. cxd4 Bg4 12. f3 Na5 13. Bd3 Be6 14. +d5 *++[ECO "D90"]+[Opening "Gruenfeld"]+[Variation "Three knights variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 *++[ECO "D90"]+[Opening "Gruenfeld"]+[Variation "Schlechter variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 c6 *++[ECO "D90"]+[Opening "Gruenfeld"]+[Variation "Three knights variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 *++[ECO "D90"]+[Opening "Gruenfeld"]+[Variation "Flohr variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qa4+ *++[ECO "D91"]+[Opening "Gruenfeld"]+[Variation "5.Bg5"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 *++[ECO "D92"]+[Opening "Gruenfeld"]+[Variation "5.Bf4"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 *++[ECO "D93"]+[Opening "Gruenfeld with Bf4    e3"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 O-O 6. e3 *++[ECO "D94"]+[Opening "Gruenfeld"]+[Variation "5.e3"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 *++[ECO "D94"]+[Opening "Gruenfeld"]+[Variation "Makogonov variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. b4 *++[ECO "D94"]+[Opening "Gruenfeld"]+[Variation "Opovcensky variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd2 *++[ECO "D94"]+[Opening "Gruenfeld with e3    Bd3"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd3 *++[ECO "D94"]+[Opening "Gruenfeld"]+[Variation "Smyslov defence"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd3 c6 7. O-O Bg4 *++[ECO "D94"]+[Opening "Gruenfeld"]+[Variation "Flohr defence"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd3 c6 7. O-O Bf5 *++[ECO "D95"]+[Opening "Gruenfeld with e3 & Qb3"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3 *++[ECO "D95"]+[Opening "Gruenfeld"]+[Variation "Botvinnik variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3 e6 *++[ECO "D95"]+[Opening "Gruenfeld"]+[Variation "Pachman variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3 dxc4 7. Bxc4 Nbd7+8. Ng5 *++[ECO "D96"]+[Opening "Gruenfeld"]+[Variation "Russian variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 *++[ECO "D97"]+[Opening "Gruenfeld"]+[Variation "Russian variation with e4"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 *++[ECO "D97"]+[Opening "Gruenfeld"]+[Variation "Russian, Alekhine (Hungarian) variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 a6 *++[ECO "D97"]+[Opening "Gruenfeld"]+[Variation "Russian, Szabo (Boleslavsky) variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 c6 *++[ECO "D97"]+[Opening "Gruenfeld"]+[Variation "Russian, Levenfish variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 b6 *++[ECO "D97"]+[Opening "Gruenfeld"]+[Variation "Russian, Byrne (Simagin) variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Nc6 *++[ECO "D97"]+[Opening "Gruenfeld"]+[Variation "Russian, Prins variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Na6 *++[ECO "D98"]+[Opening "Gruenfeld"]+[Variation "Russian, Smyslov variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 *++[ECO "D98"]+[Opening "Gruenfeld"]+[Variation "Russian, Keres variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 +8. Be3 Nfd7 9. Be2 Nb6 10. Qd3 Nc6 11. O-O-O *++[ECO "D99"]+[Opening "Gruenfeld defence"]+[Variation "Smyslov, main line"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 +8. Be3 Nfd7 9. Qb3 *++[ECO "D99"]+[Opening "Gruenfeld defence"]+[Variation "Smyslov, Yugoslav variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 +8. Be3 Nfd7 9. Qb3 c5 *++[ECO "E00"]+[Opening "Queen's pawn game"]++1. d4 Nf6 2. c4 e6 *++[ECO "E00"]+[Opening "Neo-Indian (Seirawan) attack"]++1. d4 Nf6 2. c4 e6 3. Bg5 *++[ECO "E00"]+[Opening "Catalan opening"]++1. d4 Nf6 2. c4 e6 3. g3 *++[ECO "E01"]+[Opening "Catalan"]+[Variation "closed"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 *++[ECO "E02"]+[Opening "Catalan"]+[Variation "open, 5.Qa4"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ *++[ECO "E03"]+[Opening "Catalan"]+[Variation "open, Alekhine variation"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 a6 7. Qc2 *++[ECO "E03"]+[Opening "Catalan"]+[Variation "open, 5.Qa4 Nbd7, 6.Qxc4"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 *++[ECO "E04"]+[Opening "Catalan"]+[Variation "open, 5.Nf3"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 *++[ECO "E05"]+[Opening "Catalan"]+[Variation "open, classical line"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7 *++[ECO "E06"]+[Opening "Catalan"]+[Variation "closed, 5.Nf3"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 *++[ECO "E07"]+[Opening "Catalan"]+[Variation "closed, 6...Nbd7"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 *++[ECO "E07"]+[Opening "Catalan"]+[Variation "closed, Botvinnik variation"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Nc3 c6 8.+Qd3 *++[ECO "E08"]+[Opening "Catalan"]+[Variation "closed, 7.Qc2"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 *++[ECO "E08"]+[Opening "Catalan"]+[Variation "closed, Zagoryansky variation"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8.+Rd1 b6 9. a4 *++[ECO "E08"]+[Opening "Catalan"]+[Variation "closed, Qc2 & b3"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8.+b3 *++[ECO "E08"]+[Opening "Catalan"]+[Variation "closed, Spassky gambit"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8.+b3 b6 9. Rd1 Bb7 10. Nc3 b5 *++[ECO "E09"]+[Opening "Catalan"]+[Variation "closed, main line"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8.+Nbd2 *++[ECO "E09"]+[Opening "Catalan"]+[Variation "closed, Sokolsky variation"]++1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8.+Nbd2 b6 9. b3 a5 10. Bb2 Ba6 *++[ECO "E10"]+[Opening "Queen's pawn game"]++1. d4 Nf6 2. c4 e6 3. Nf3 *++[ECO "E10"]+[Opening "Blumenfeld counter-gambit"]++1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 *++[ECO "E10"]+[Opening "Blumenfeld counter-gambit accepted"]++1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. dxe6 fxe6 6. cxb5 d5 *++[ECO "E10"]+[Opening "Blumenfeld counter-gambit, Dus-Chotimursky variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5 *++[ECO "E10"]+[Opening "Blumenfeld counter-gambit, Spielmann variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5 exd5 6. cxd5 h6 *++[ECO "E10"]+[Opening "Dzindzikhashvili defence"]++1. d4 Nf6 2. c4 e6 3. Nf3 a6 *++[ECO "E10"]+[Opening "Doery defence"]++1. d4 Nf6 2. c4 e6 3. Nf3 Ne4 *++[ECO "E11"]+[Opening "Bogo-Indian defence"]++1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ *++[ECO "E11"]+[Opening "Bogo-Indian defence, Gruenfeld variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 *++[ECO "E11"]+[Opening "Bogo-Indian defence, Nimzovich variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7 *++[ECO "E11"]+[Opening "Bogo-Indian defence, Monticelli trap"]++1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Bxd2+ 5. Qxd2 b6 6. g3 Bb7 7. Bg2 O-O+8. Nc3 Ne4 9. Qc2 Nxc3 10. Ng5 *++[ECO "E12"]+[Opening "Queen's Indian defence"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 *++[ECO "E12"]+[Opening "Queen's Indian"]+[Variation "Miles variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Bf4 *++[ECO "E12"]+[Opening "Queen's Indian"]+[Variation "Petrosian system"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 *++[ECO "E12"]+[Opening "Queen's Indian"]+[Variation "4.Nc3"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 *++[ECO "E12"]+[Opening "Queen's Indian"]+[Variation "4.Nc3, Botvinnik variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 h6 6. Bh4 g5 7. Bg3 Nh5 *++[ECO "E13"]+[Opening "Queen's Indian"]+[Variation "4.Nc3, main line"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 h6 6. Bh4 Bb4 *++[ECO "E14"]+[Opening "Queen's Indian"]+[Variation "4.e3"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 *++[ECO "E14"]+[Opening "Queen's Indian"]+[Variation "Averbakh variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 c5 6. O-O Be7 7. b3 O-O 8. +Bb2 cxd4 9. Nxd4 *++[ECO "E15"]+[Opening "Queen's Indian"]+[Variation "4.g3"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 *++[ECO "E15"]+[Opening "Queen's Indian"]+[Variation "Nimzovich variation (exaggerated fianchetto)"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 *++[ECO "E15"]+[Opening "Queen's Indian"]+[Variation "4.g3 Bb7"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 *++[ECO "E15"]+[Opening "Queen's Indian"]+[Variation "Rubinstein variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. d5 exd5 7. Nh4 *++[ECO "E15"]+[Opening "Queen's Indian"]+[Variation "Buerger variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. d5 exd5 7. Ng5 *++[ECO "E16"]+[Opening "Queen's Indian"]+[Variation "Capablanca variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ *++[ECO "E16"]+[Opening "Queen's Indian"]+[Variation "Yates variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 a5 *++[ECO "E16"]+[Opening "Queen's Indian"]+[Variation "Riumin variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Be7 *++[ECO "E17"]+[Opening "Queen's Indian"]+[Variation "5.Bg2 Be7"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 *++[ECO "E17"]+[Opening "Queen's Indian"]+[Variation "anti-Queen's Indian system"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3 *++[ECO "E17"]+[Opening "Queen's Indian"]+[Variation "Opovcensky variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3 Ne4 7. Bd2 *++[ECO "E17"]+[Opening "Queen's Indian"]+[Variation "old main line, 6.O-O"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O *++[ECO "E17"]+[Opening "Queen's Indian"]+[Variation "Euwe variation"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. b3 *++[ECO "E18"]+[Opening "Queen's Indian"]+[Variation "old main line, 7.Nc3"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 *++[ECO "E19"]+[Opening "Queen's Indian"]+[Variation "old main line, 9.Qxc3"]++1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8.+Qc2 Nxc3 9. Qxc3 *++[ECO "E20"]+[Opening "Nimzo-Indian defence"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 *++[ECO "E20"]+[Opening "Nimzo-Indian"]+[Variation "Kmoch variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 *++[ECO "E20"]+[Opening "Nimzo-Indian"]+[Variation "Mikenas attack"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qd3 *++[ECO "E20"]+[Opening "Nimzo-Indian"]+[Variation "Romanishin-Kasparov (Steiner) system"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 *++[ECO "E21"]+[Opening "Nimzo-Indian"]+[Variation "three knights variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 *++[ECO "E21"]+[Opening "Nimzo-Indian"]+[Variation "three knights, Korchnoi variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5 *++[ECO "E21"]+[Opening "Nimzo-Indian"]+[Variation "three knights, Euwe variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5 Ne4 *++[ECO "E22"]+[Opening "Nimzo-Indian"]+[Variation "Spielmann variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 *++[ECO "E23"]+[Opening "Nimzo-Indian"]+[Variation "Spielmann, 4...c5, 5.dc Nc6"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 *++[ECO "E23"]+[Opening "Nimzo-Indian"]+[Variation "Spielmann, Karlsbad variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxd2+*++[ECO "E23"]+[Opening "Nimzo-Indian"]+[Variation "Spielmann, San Remo variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxc5+*++[ECO "E23"]+[Opening "Nimzo-Indian"]+[Variation "Spielmann, Staahlberg variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxc5+8. Qc2 f5 9. g3 *++[ECO "E24"]+[Opening "Nimzo-Indian"]+[Variation "Saemisch variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 *++[ECO "E24"]+[Opening "Nimzo-Indian"]+[Variation "Saemisch, Botvinnik variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. f3 d5 7. e3 O-O 8.+cxd5 Nxd5 *++[ECO "E25"]+[Opening "Nimzo-Indian"]+[Variation "Saemisch variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. f3 d5 7. cxd5 *++[ECO "E25"]+[Opening "Nimzo-Indian"]+[Variation "Saemisch, Keres variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. f3 d5 7. cxd5 Nxd5+8. dxc5 *++[ECO "E25"]+[Opening "Nimzo-Indian"]+[Variation "Saemisch, Romanovsky variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. f3 d5 7. cxd5 Nxd5+8. dxc5 f5 *++[ECO "E26"]+[Opening "Nimzo-Indian"]+[Variation "Saemisch variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 *++[ECO "E26"]+[Opening "Nimzo-Indian"]+[Variation "Saemisch, O'Kelly variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 b6 *++[ECO "E27"]+[Opening "Nimzo-Indian"]+[Variation "Saemisch variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O *++[ECO "E28"]+[Opening "Nimzo-Indian"]+[Variation "Saemisch variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O 6. e3 *++[ECO "E29"]+[Opening "Nimzo-Indian"]+[Variation "Saemisch, main line"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O 6. e3 c5 7. Bd3 Nc6 *++[ECO "E29"]+[Opening "Nimzo-Indian"]+[Variation "Saemisch, Capablanca variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O 6. e3 c5 7. Bd3 Nc6 +8. Ne2 b6 9. e4 Ne8 *++[ECO "E30"]+[Opening "Nimzo-Indian"]+[Variation "Leningrad variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 *++[ECO "E30"]+[Opening "Nimzo-Indian"]+[Variation "Leningrad, ...b5 gambit"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 b5 *++[ECO "E31"]+[Opening "Nimzo-Indian"]+[Variation "Leningrad, main line"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 d6 *++[ECO "E32"]+[Opening "Nimzo-Indian"]+[Variation "classical variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 *++[ECO "E32"]+[Opening "Nimzo-Indian"]+[Variation "classical, Adorjan gambit"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b5 *++[ECO "E33"]+[Opening "Nimzo-Indian"]+[Variation "classical, 4...Nc6"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 *++[ECO "E33"]+[Opening "Nimzo-Indian"]+[Variation "classical, Milner-Barry (Zurich) variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 5. Nf3 d6 *++[ECO "E34"]+[Opening "Nimzo-Indian"]+[Variation "classical, Noa variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 *++[ECO "E35"]+[Opening "Nimzo-Indian"]+[Variation "classical, Noa variation, 5.cd ed"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5 *++[ECO "E36"]+[Opening "Nimzo-Indian"]+[Variation "classical, Noa variation, 5.a3"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 *++[ECO "E36"]+[Opening "Nimzo-Indian"]+[Variation "classical, Botvinnik variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Nc6 *++[ECO "E36"]+[Opening "Nimzo-Indian"]+[Variation "classical, Noa variation, main line"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 *++[ECO "E37"]+[Opening "Nimzo-Indian"]+[Variation "classical, Noa variation, main line, 7.Qc2"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 *++[ECO "E37"]+[Opening "Nimzo-Indian"]+[Variation "classical, San Remo variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 Nc6+8. e3 e5 *++[ECO "E38"]+[Opening "Nimzo-Indian"]+[Variation "classical, 4...c5"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 *++[ECO "E39"]+[Opening "Nimzo-Indian"]+[Variation "classical, Pirc variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O *++[ECO "E40"]+[Opening "Nimzo-Indian"]+[Variation "4.e3"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 *++[ECO "E40"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, Taimanov variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Nc6 *++[ECO "E41"]+[Opening "Nimzo-Indian"]+[Variation "4.e3 c5"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 *++[ECO "E41"]+[Opening "Nimzo-Indian"]+[Variation "e3, Huebner variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 *++[ECO "E42"]+[Opening "Nimzo-Indian"]+[Variation "4.e3 c5, 5.Ne2 (Rubinstein)"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2 *++[ECO "E43"]+[Opening "Nimzo-Indian"]+[Variation "Fischer variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 *++[ECO "E44"]+[Opening "Nimzo-Indian"]+[Variation "Fischer variation, 5.Ne2"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 *++[ECO "E45"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, Bronstein (Byrne) variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 Ba6 *++[ECO "E46"]+[Opening "Nimzo-Indian"]+[Variation "4.e3 O-O"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O *++[ECO "E46"]+[Opening "Nimzo-Indian"]+[Variation "Reshevsky variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2 *++[ECO "E46"]+[Opening "Nimzo-Indian"]+[Variation "Simagin variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2 d5 6. a3 Bd6 *++[ECO "E47"]+[Opening "Nimzo-Indian"]+[Variation "4.e3 O-O, 5.Bd3"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 *++[ECO "E48"]+[Opening "Nimzo-Indian"]+[Variation "4.e3 O-O, 5.Bd3 d5"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 *++[ECO "E49"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, Botvinnik system"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 *++[ECO "E50"]+[Opening "Nimzo-Indian"]+[Variation "4.e3 e8g8, 5.Nf3, without ...d5"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 *++[ECO "E51"]+[Opening "Nimzo-Indian"]+[Variation "4.e3 e8g8, 5.Nf3 d7d5"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 *++[ECO "E51"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, Ragozin variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 Nc6 7. O-O dxc4 *++[ECO "E52"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, main line with ...b6"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 b6 *++[ECO "E53"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, main line with ...c5"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 *++[ECO "E53"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, Keres variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O b6 *++[ECO "E53"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, Gligoric system with 7...Nbd7"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O Nbd7 *++[ECO "E54"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, Gligoric system with 7...dc"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O dxc4 8.+Bxc4 *++[ECO "E54"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, Gligoric system, Smyslov variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O dxc4 8.+Bxc4 Qe7 *++[ECO "E55"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, Gligoric system, Bronstein variation"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O dxc4 8.+Bxc4 Nbd7 *++[ECO "E56"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, main line with 7...Nc6"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O Nc6 *++[ECO "E57"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, main line with 8...dc and 9...cd"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O Nc6 8. +a3 dxc4 9. Bxc4 cxd4 *++[ECO "E58"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, main line with 8...Bxc3"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O Nc6 8. +a3 Bxc3 9. bxc3 *++[ECO "E59"]+[Opening "Nimzo-Indian"]+[Variation "4.e3, main line"]++1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O Nc6 8. +a3 Bxc3 9. bxc3 dxc4 10. Bxc4 *++[ECO "E60"]+[Opening "King's Indian defence"]++1. d4 Nf6 2. c4 g6 *++[ECO "E60"]+[Opening "King's Indian, 3.Nf3"]++1. d4 Nf6 2. c4 g6 3. Nf3 *++[ECO "E60"]+[Opening "Queen's pawn"]+[Variation "Mengarini attack"]++1. d4 Nf6 2. c4 g6 3. Qc2 *++[ECO "E60"]+[Opening "King's Indian"]+[Variation "Anti-Gruenfeld"]++1. d4 Nf6 2. c4 g6 3. d5 *++[ECO "E60"]+[Opening "King's Indian"]+[Variation "Danube gambit"]++1. d4 Nf6 2. c4 g6 3. d5 b5 *++[ECO "E60"]+[Opening "King's Indian"]+[Variation "3.g3"]++1. d4 Nf6 2. c4 g6 3. g3 *++[ECO "E60"]+[Opening "King's Indian"]+[Variation "3.g3, counterthrust variation"]++1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 *++[ECO "E61"]+[Opening "King's Indian defence, 3.Nc3"]++1. d4 Nf6 2. c4 g6 3. Nc3 *++[ECO "E61"]+[Opening "King's Indian"]+[Variation "Smyslov system"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. Bg5 *++[ECO "E62"]+[Opening "King's Indian"]+[Variation "fianchetto variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 *++[ECO "E62"]+[Opening "King's Indian"]+[Variation "fianchetto, Larsen system"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c6 7. O-O Bf5 *++[ECO "E62"]+[Opening "King's Indian"]+[Variation "fianchetto, Kavalek (Bronstein) variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c6 7. O-O Qa5 *++[ECO "E62"]+[Opening "King's Indian"]+[Variation "fianchetto with ...Nc6"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6 *++[ECO "E62"]+[Opening "King's Indian"]+[Variation "fianchetto, Uhlmann (Szabo) variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6 7. O-O e5 *++[ECO "E62"]+[Opening "King's Indian"]+[Variation "fianchetto, lesser Simagin (Spassky) variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6 7. O-O Bf5 *++[ECO "E62"]+[Opening "King's Indian"]+[Variation "fianchetto, Simagin variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6 7. O-O Bg4 *++[ECO "E63"]+[Opening "King's Indian"]+[Variation "fianchetto, Panno variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6 7. O-O a6 *++[ECO "E64"]+[Opening "King's Indian"]+[Variation "fianchetto, Yugoslav system"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c5 *++[ECO "E65"]+[Opening "King's Indian"]+[Variation "fianchetto, Yugoslav, 7.O-O"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c5 7. O-O *++[ECO "E66"]+[Opening "King's Indian"]+[Variation "fianchetto, Yugoslav Panno"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c5 7. O-O Nc6 8. +d5 *++[ECO "E67"]+[Opening "King's Indian"]+[Variation "fianchetto with ...Nd7"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nbd7 *++[ECO "E67"]+[Opening "King's Indian"]+[Variation "fianchetto, classical variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nbd7 7. O-O e5 *++[ECO "E68"]+[Opening "King's Indian"]+[Variation "fianchetto, classical variation, 8.e4"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nbd7 7. O-O e5 8.+e4 *++[ECO "E69"]+[Opening "King's Indian"]+[Variation "fianchetto, classical main line"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nbd7 7. O-O e5 8.+e4 c6 9. h3 *++[ECO "E70"]+[Opening "King's Indian"]+[Variation "4.e4"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 *++[ECO "E70"]+[Opening "King's Indian"]+[Variation "Kramer system"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 *++[ECO "E70"]+[Opening "King's Indian"]+[Variation "accelerated Averbakh system"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5 *++[ECO "E71"]+[Opening "King's Indian"]+[Variation "Makagonov system (5.h3)"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 *++[ECO "E72"]+[Opening "King's Indian with e4 & g3"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3 *++[ECO "E72"]+[Opening "King's Indian"]+[Variation "Pomar system"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3 O-O 6. Bg2 e5 7. Nge2 *++[ECO "E73"]+[Opening "King's Indian"]+[Variation "5.Be2"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 *++[ECO "E73"]+[Opening "King's Indian"]+[Variation "Semi-Averbakh system"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Be3 *++[ECO "E73"]+[Opening "King's Indian"]+[Variation "Averbakh system"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 *++[ECO "E74"]+[Opening "King's Indian"]+[Variation "Averbakh, 6...c5"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 *++[ECO "E75"]+[Opening "King's Indian"]+[Variation "Averbakh, main line"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6 *++[ECO "E76"]+[Opening "King's Indian"]+[Variation "Four pawns attack"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 *++[ECO "E76"]+[Opening "King's Indian"]+[Variation "Four pawns attack, dynamic line"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5 *++[ECO "E77"]+[Opening "King's Indian"]+[Variation "Four pawns attack, 6.Be2"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 *++[ECO "E77"]+[Opening "King's Indian"]+[Variation "Six pawns attack"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 c5 7. d5 e6 8. dxe6+fxe6 9. g4 Nc6 10. h4 *++[ECO "E77"]+[Opening "King's Indian"]+[Variation "Four pawns attack"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 c5 7. d5 e6 8. Nf3+*++[ECO "E77"]+[Opening "King's Indian"]+[Variation "Four pawns attack, Florentine gambit"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 c5 7. d5 e6 8. Nf3+exd5 9. e5 *++[ECO "E78"]+[Opening "King's Indian"]+[Variation "Four pawns attack, with Be2 and Nf3"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 c5 7. Nf3 *++[ECO "E79"]+[Opening "King's Indian"]+[Variation "Four pawns attack, main line"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 c5 7. Nf3 cxd4 8. +Nxd4 Nc6 9. Be3 *++[ECO "E80"]+[Opening "King's Indian"]+[Variation "Saemisch variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 *++[ECO "E81"]+[Opening "King's Indian"]+[Variation "Saemisch, 5...O-O"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O *++[ECO "E81"]+[Opening "King's Indian"]+[Variation "Saemisch, Byrne variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 c6 7. Bd3 a6 *++[ECO "E82"]+[Opening "King's Indian"]+[Variation "Saemisch, double fianchetto variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 b6 *++[ECO "E83"]+[Opening "King's Indian"]+[Variation "Saemisch, 6...Nc6"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 *++[ECO "E83"]+[Opening "King's Indian"]+[Variation "Saemisch, Ruban variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 Rb8 *++[ECO "E83"]+[Opening "King's Indian"]+[Variation "Saemisch, Panno formation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 a6 *++[ECO "E84"]+[Opening "King's Indian"]+[Variation "Saemisch, Panno main line"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 a6 8. +Qd2 Rb8 *++[ECO "E85"]+[Opening "King's Indian"]+[Variation "Saemisch, orthodox variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 *++[ECO "E86"]+[Opening "King's Indian"]+[Variation "Saemisch, orthodox, 7.Nge2 c6"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. Nge2 c6 *++[ECO "E87"]+[Opening "King's Indian"]+[Variation "Saemisch, orthodox, 7.d5"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 *++[ECO "E87"]+[Opening "King's Indian"]+[Variation "Saemisch, orthodox, Bronstein variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 Nh5 8. Qd2+Qh4+ 9. g3 Nxg3 10. Qf2 Nxf1 11. Qxh4 Nxe3 12. Ke2 Nxc4 *++[ECO "E88"]+[Opening "King's Indian"]+[Variation "Saemisch, orthodox, 7.d5 c6"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 c6 *++[ECO "E89"]+[Opening "King's Indian"]+[Variation "Saemisch, orthodox main line"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 c6 8. Nge2+cxd5 *++[ECO "E90"]+[Opening "King's Indian"]+[Variation "5.Nf3"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 *++[ECO "E90"]+[Opening "King's Indian"]+[Variation "Larsen variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be3 *++[ECO "E90"]+[Opening "King's Indian"]+[Variation "Zinnowitz variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Bg5 *++[ECO "E91"]+[Opening "King's Indian"]+[Variation "6.Be2"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 *++[ECO "E91"]+[Opening "King's Indian"]+[Variation "Kazakh variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Na6 *++[ECO "E92"]+[Opening "King's Indian"]+[Variation "classical variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 *++[ECO "E92"]+[Opening "King's Indian"]+[Variation "Andersson variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. dxe5 *++[ECO "E92"]+[Opening "King's Indian"]+[Variation "Gligoric-Taimanov system"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. Be3 *++[ECO "E92"]+[Opening "King's Indian"]+[Variation "Petrosian system"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 *++[ECO "E92"]+[Opening "King's Indian"]+[Variation "Petrosian system, Stein variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 a5 *++[ECO "E93"]+[Opening "King's Indian"]+[Variation "Petrosian system, main line"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7 *++[ECO "E93"]+[Opening "King's Indian"]+[Variation "Petrosian system, Keres variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7 8. +Bg5 h6 9. Bh4 g5 10. Bg3 Nh5 11. h4 *++[ECO "E94"]+[Opening "King's Indian"]+[Variation "orthodox variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O *++[ECO "E94"]+[Opening "King's Indian"]+[Variation "orthodox, Donner variation"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O c6 *++[ECO "E94"]+[Opening "King's Indian"]+[Variation "orthodox, 7...Nbd7"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 *++[ECO "E95"]+[Opening "King's Indian"]+[Variation "orthodox, 7...Nbd7, 8.Re1"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8.+Re1 *++[ECO "E96"]+[Opening "King's Indian"]+[Variation "orthodox, 7...Nbd7, main line"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8.+Re1 c6 9. Bf1 a5 *++[ECO "E97"]+[Opening "King's Indian"]+[Variation "orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 *++[ECO "E97"]+[Opening "King's Indian"]+[Variation "orthodox, Aronin-Taimanov, bayonet attack"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. +d5 Ne7 9. b4 *++[ECO "E98"]+[Opening "King's Indian"]+[Variation "orthodox, Aronin-Taimanov, 9.Ne1"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. +d5 Ne7 9. Ne1 *++[ECO "E99"]+[Opening "King's Indian"]+[Variation "orthodox, Aronin-Taimanov, main line"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. +d5 Ne7 9. Ne1 Nd7 10. f3 f5 *++[ECO "E99"]+[Opening "King's Indian"]+[Variation "orthodox, Aronin-Taimanov, Benko attack"]++1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. +d5 Ne7 9. Ne1 Nd7 10. f3 f5 11. g4 *+