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==D – Closed Games and Semi-Closed Games== * 1.d4 d5: [[Closed Game]] (D00–D69) * 1.d4 Nf6 2.c4 g6 with 3...d5: [[Grünfeld Defence]] (D70–D99) ===D00–D69=== 1.d4 d5: [[Closed Game]] *D00 [[Queen's Pawn Game]] (including [[Blackmar–Diemer Gambit]], [[Halosar Trap]] and others) *Queen's Pawn Game: 1.d4 d5 *Queen's Pawn Game: Accelerated London System: 1.d4 d5 2.Bf4 *Queen's Pawn Game: Accelerated London System, Steinitz Countergambit: 1.d4 d5 2.Bf4 c5 *Queen's Pawn Game: Accelerated London System, Steinitz Countergambit Accepted: 1.d4 d5 2.Bf4 c5 3.dxc5 *Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit: 1.d4 d5 2.Bf4 c5 3.e4 *Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit Accepted: 1.d4 d5 2.Bf4 c5 3.e4 dxe4 *Queen's Pawn Game: Levitsky Attack: 1.d4 d5 2.Bg5 *Queen's Pawn Game: Levitsky Attack, Welling Variation: 1.d4 d5 2.Bg5 Bg4 *Queen's Pawn Game: 1.d4 d5 2.e3 *Queen's Pawn Game: 1.d4 d5 2.e3 Nf6 *Queen's Pawn Game: Stonewall Attack: 1.d4 d5 2.e3 Nf6 3.Bd3 *Blackmar-Diemer Gambit: 1.d4 d5 2.e4 *Blackmar-Diemer Gambit: Fritz Attack: 1.d4 d5 2.e4 dxe4 3.Bc4 *Blackmar-Diemer Gambit: Diemer-Rosenberg Attack: 1.d4 d5 2.e4 dxe4 3.Be3 *Blackmar-Diemer Gambit: Blackmar Gambit: 1.d4 d5 2.e4 dxe4 3.f3 *Blackmar-Diemer Gambit: Zeller Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Bf5 *Blackmar-Diemer Gambit: Zeller Defense, Soller Attack: 1.d4 d5 2.e4 dxe4 3.Nc3 Bf5 4.f3 Nf6 5.Bc4 *Blackmar-Diemer Gambit: Reversed Albin Countergambit: 1.d4 d5 2.e4 dxe4 3.Nc3 c5 *Blackmar-Diemer Gambit: Lemberger Countergambit: 1.d4 d5 2.e4 dxe4 3.Nc3 e5 *Blackmar-Diemer Gambit: Lemberger Countergambit, Soller Attack: 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Be3 *Blackmar-Diemer Gambit: Lemberger Countergambit, Endgame Variation: 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.dxe5 *Blackmar-Diemer Gambit: Lemberger Countergambit, Rasmussen Attack: 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nge2 *Blackmar-Diemer Gambit: Lemberger Countergambit, Lange Gambit: 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nxe4 *Blackmar-Diemer Gambit: Lemberger Countergambit, Sneiders Attack: 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Qh5 *Blackmar-Diemer Gambit: Netherlands Variation: 1.d4 d5 2.e4 dxe4 3.Nc3 f5 *Blackmar-Diemer Gambit: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 *Blackmar-Diemer Gambit: Rasa-Studier Gambit: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Be3 *Blackmar-Diemer Gambit: von Popiel Gambit: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Bg5 *Blackmar-Diemer Gambit: von Popiel Gambit, Zilbermints Variation: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Bg5 Bf5 5.Bxf6 exf6 6.g4 Bg6 7.Qe2 Bb4 8.Qb5+ *Blackmar-Diemer Gambit Declined: Gedult Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 a6 *Blackmar-Diemer Gambit Declined: Vienna Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 *Blackmar-Diemer Gambit Declined: Brombacher Countergambit: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c5 *Blackmar-Diemer Gambit Declined: O'Kelly Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c6 *Blackmar-Diemer Gambit Declined: Langeheinicke Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e3 *Blackmar-Diemer Gambit Declined: Elbert Countergambit: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e5 *Blackmar-Diemer Gambit Declined: Weinsbach Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e6 *Blackmar-Diemer Gambit Accepted: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 *Blackmar-Diemer Gambit Accepted: Ritter Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 b6 *Blackmar-Diemer Gambit Accepted: Gunderam Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bf5 *Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bf5 6.Ne5 e6 7.g4 Be4 *Blackmar-Diemer Gambit Accepted: Teichmann Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4 *Blackmar-Diemer Gambit Accepted: Teichmann Defense, Classical Variation: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4 6.h3 Bxf3 7.Qxf3 c6 8.Be3 *Blackmar-Diemer Gambit Accepted: Teichmann Defense, Seidel-Hall Attack: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4 6.h3 Bxf3 7.Qxf3 c6 8.g4 *Blackmar-Diemer Gambit Accepted: Teichmann Defense, Ciesielski Variation: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4 6.h3 Bxf3 7.Qxf3 c6 8.Qf2 *Blackmar-Diemer Gambit Accepted: Kaulich Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c5 *Blackmar-Diemer Gambit Accepted: Ziegler Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c6 *Blackmar-Diemer Gambit Accepted: Euwe Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6 *Blackmar-Diemer Gambit Accepted: Euwe Defense, Zilbermints Gambit: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6 6.Bg5 Be7 7.Bd3 Nc6 8.0-0 Nxd4 9.Kh1 *Blackmar-Diemer Gambit Accepted: Bogoljubow Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 *Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Mad Dog Attack: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.h4 *Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Nimzowitsch Attack: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.Ne5 *Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Kloss Attack: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.0-0 0-0 8.Kh1 *Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Studier Attack: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.0-0 0-0 8.Qe1 *Blackmar-Diemer Gambit Accepted: Schlutter Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Nbd7 *Blackmar-Diemer Gambit Accepted: Pietrowsky Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Nc6 *Blackmar-Diemer Gambit Accepted: Holwell Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Qd6 *Blackmar-Diemer Gambit Accepted: Ryder Gambit: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 *Blackmar-Diemer Gambit Declined: Lamb Defense: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Nc6 *Queen's Pawn Game: Mason Attack: 1.d4 d5 2.f4 *Queen's Pawn Game: Zurich Gambit: 1.d4 d5 2.g4 *Queen's Pawn Game: Chigorin Variation: 1.d4 d5 2.Nc3 *Queen's Pawn Game: Chigorin Variation, Alburt Defense: 1.d4 d5 2.Nc3 Bf5 *Queen's Pawn Game: Chigorin Variation, Anti-Veresov: 1.d4 d5 2.Nc3 Bg4 *Queen's Pawn Game: Chigorin Variation, Irish Gambit: 1.d4 d5 2.Nc3 c5 *Queen's Pawn Game: Chigorin Variation, Shaviliuk Gambit: 1.d4 d5 2.Nc3 e5 *Queen's Pawn Game: Chigorin Variation: 1.d4 d5 2.Nc3 e6 *Queen's Pawn Game: Chigorin Variation, Shropshire Defense: 1.d4 d5 2.Nc3 h5 *Amazon Attack: 1.d4 d5 2.Qd3 *Queen's Pawn Game: Chigorin Variation, Fianchetto Defense: 1.d4 g6 2.Nf3 Bg7 3.Nc3 d5 *Queen's Pawn Game: Hübsch Gambit: 1.d4 Nf6 2.Nc3 d5 3.e4 *D01 [[Richter–Veresov Attack]] *Rapport-Jobava System, with e6: 1.d4 d5 2.Nc3 e6 3.Bf4 *Rapport-Jobava System: 1.d4 d5 2.Nc3 Nf6 3.Bf4 *Rapport-Jobava System: 1.d4 d5 2.Nc3 Nf6 3.Bf4 e6 *Rapport-Jobava System: 1.d4 d5 2.Nc3 Nf6 3.Bf4 g6 *Richter-Veresov Attack: 1.d4 Nf6 2.Nc3 d5 3.Bg5 *Richter-Veresov Attack: 1.d4 Nf6 2.Nc3 d5 3.Bg5 Bf5 *Richter-Veresov Attack: Veresov Variation: 1.d4 Nf6 2.Nc3 d5 3.Bg5 Bf5 4.Bxf6 *Richter-Veresov Attack: Richter Variation: 1.d4 Nf6 2.Nc3 d5 3.Bg5 Bf5 4.f3 *Richter-Veresov Attack: Malich Gambit: 1.d4 Nf6 2.Nc3 d5 3.Bg5 c5 4.Bxf6 gxf6 5.e4 dxe4 6.d5 *Richter-Veresov Attack: Two Knights System: 1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 *Richter-Veresov Attack: Two Knights System, Grünfeld Defense: 1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 g6 *Richter-Veresov Attack: Boyce Defense: 1.d4 Nf6 2.Nc3 d5 3.Bg5 Ne4 *D02 Queen's Pawn Game, 2.Nf3 (including the [[London System]]) *Queen's Pawn Game: Zukertort Variation: 1.d4 d5 2.Nf3 *Queen's Gambit Declined: Baltic Defense, Pseudo-Slav: 1.d4 d5 2.Nf3 Bf5 3.c4 e6 4.Nc3 c6 *Queen's Pawn Game: Krause Variation: 1.d4 d5 2.Nf3 c5 *Queen's Pawn Game: Chandler Gambit: 1.d4 d5 2.Nf3 c5 3.g3 cxd4 4.Bg2 *Queen's Pawn Game: Levitsky Attack, Euwe Variation, Modern Line: 1.d4 d5 2.Nf3 c6 3.Bg5 h6 4.Bh4 Qb6 *Queen's Pawn Game: London System, with e6: 1.d4 d5 2.Nf3 e6 3.Bf4 *Queen's Pawn Game: Chigorin Variation: 1.d4 d5 2.Nf3 Nc6 *Queen's Pawn Game: Symmetrical Variation: 1.d4 d5 2.Nf3 Nf6 *Queen's Pawn Game: London System: 1.d4 d5 2.Nf3 Nf6 3.Bf4 *Queen's Pawn Game: Zilbermints Countergambit: 1.d4 d5 2.Nf3 Nf6 3.c4 b5 *Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan: 1.d4 d5 2.Nf3 Nf6 3.g3 *Queen's Pawn Game: London System, Pterodactyl Variation: 1.d4 g6 2.Nf3 Bg7 3.Bf4 c5 4.c3 cxd4 5.cxd4 Qa5+ *London System: Poisoned Pawn Variation: 1.d4 Nf6 2.Nf3 d5 3.Bf4 c5 4.e3 Qb6 5.Nc3 *Queen's Pawn Game: Anti-Torre: 1.Nf3 d5 2.d4 Bg4 *D03 [[Torre Attack]], Tartakower Variation *Queen's Pawn Game: Torre Attack: 1.d4 d5 2.Nf3 Nf6 3.Bg5 *Queen's Pawn Game: Torre Attack, Grünfeld Variation: 1.d4 d5 2.Nf3 Nf6 3.Bg5 g6 *Queen's Pawn Game: Torre Attack, Gossip Variation: 1.d4 d5 2.Nf3 Nf6 3.Bg5 Ne4 *D04 Queen's Pawn Game, [[Colle System]] *Queen's Pawn Game: Colle System: 1.d4 d5 2.Nf3 Nf6 3.e3 *Queen's Pawn Game: Colle System, Anti-Colle: 1.d4 d5 2.Nf3 Nf6 3.e3 Bf5 *Queen's Pawn Game: Colle System, Grünfeld Formation: 1.d4 d5 2.Nf3 Nf6 3.e3 g6 4.Bd3 Bg7 *D05 Queen's Pawn Game, Zukertort Variation (including [[Colle System]]) *Queen's Pawn Game: Zukertort Variation: 1.d4 d5 2.Nf3 c5 3.e3 Nf6 4.Nbd2 e6 5.b3 *Queen's Pawn Game: Colle System: 1.d4 d5 2.Nf3 Nf6 3.e3 e6 *Queen's Pawn Game: Colle System: 1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3 *Rubinstein Opening: Semi-Slav Defense: 1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3 Bd6 5.0-0 0-0 6.b3 Nbd7 7.Bb2 *Rubinstein Opening: 1.d4 Nf6 2.Nf3 e6 3.e3 c5 4.Bd3 d5 5.b3 *Rubinstein Opening: Bogoljubow Defense: 1.d4 Nf6 2.Nf3 e6 3.e3 c5 4.Bd3 d5 5.b3 Nc6 6.0-0 Bd6 7.Bb2 0-0 *Rubinstein Opening: Classical Defense: 1.d4 Nf6 2.Nf3 e6 3.e3 c5 4.Bd3 d5 5.b3 Nc6 6.0-0 Be7 7.Bb2 0-0 *Queen's Pawn Game: Colle System, Traditional Colle: 1.d4 Nf6 2.Nf3 e6 3.e3 c5 4.Bd3 d5 5.c3 *D06 [[Queen's Gambit]] (including the [[Baltic Defence]], [[Marshall Defence]] and [[Symmetrical Defence]]) *Queen's Gambit: 1.d4 d5 2.c4 *Queen's Gambit Declined: Zilbermints Gambit: 1.d4 d5 2.c4 b5 *Queen's Gambit Declined: Baltic Defense: 1.d4 d5 2.c4 Bf5 *Queen's Gambit Declined: Baltic Defense, Argentinian Gambit: 1.d4 d5 2.c4 Bf5 3.cxd5 Bxb1 4.Qa4+ c6 5.dxc6 Nxc6 *Queen's Gambit Declined: Baltic Defense, Pseudo-Chigorin: 1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Nf3 Nc6 *Queen's Gambit Declined: Baltic Defense, Queen Attack Deferred: 1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Qb3 *Queen's Gambit Declined: Baltic Defense, Queen Attack: 1.d4 d5 2.c4 Bf5 3.Qb3 *Queen's Gambit Declined: Austrian Defense: 1.d4 d5 2.c4 c5 *Queen's Gambit Declined: Austrian Defense, Gusev Countergambit: 1.d4 d5 2.c4 c5 3.cxd5 Nf6 *Queen's Gambit Declined: Austrian Defense, Haberditz Variation: 1.d4 d5 2.c4 c5 3.cxd5 Nf6 4.e4 Nxe4 5.dxc5 Qa5+ *Queen's Gambit Declined: Austrian Attack, Salvio Countergambit: 1.d4 d5 2.c4 c5 3.dxc5 d4 *Queen's Gambit Declined: Marshall Defense: 1.d4 d5 2.c4 Nf6 *Queen's Gambit Declined: Marshall Defense, Tan Gambit: 1.d4 d5 2.c4 Nf6 3.cxd5 c6 *D07 QGD, [[Chigorin Defence]] *Queen's Gambit Declined: Chigorin Defense: 1.d4 d5 2.c4 Nc6 *Queen's Gambit Declined: Chigorin Defense, Exchange Variation: 1.d4 d5 2.c4 Nc6 3.cxd5 Qxd5 *Queen's Gambit Declined: Chigorin Defense, Exchange Variation, Costa's Line: 1.d4 d5 2.c4 Nc6 3.cxd5 Qxd5 4.e3 e5 5.Nc3 Bb4 6.Bd2 Bxc3 7.Bxc3 exd4 8.Ne2 *Queen's Gambit Declined: Chigorin Defense: 1.d4 d5 2.c4 Nc6 3.Nc3 *Queen's Gambit Declined: Chigorin Defense: 1.d4 d5 2.c4 Nc6 3.Nc3 dxc4 *Queen's Gambit Declined: Chigorin Defense, Janowski Variation: 1.d4 d5 2.c4 Nc6 3.Nc3 dxc4 4.Nf3 *Queen's Gambit Declined: Chigorin Defense, Modern Gambit: 1.d4 d5 2.c4 Nc6 3.Nc3 dxc4 4.Nf3 Nf6 *Queen's Gambit Declined: Chigorin Defense, Tartakower Gambit: 1.d4 d5 2.c4 Nc6 3.Nc3 e5 *Queen's Gambit Declined: Chigorin Defense, Main Line: 1.d4 d5 2.c4 Nc6 3.Nf3 Bg4 *Queen's Gambit Declined: Chigorin Defense, Main Line, Alekhine Variation: 1.d4 d5 2.c4 Nc6 3.Nf3 Bg4 4.Qa4 *Queen's Gambit Declined: Chigorin Defense, Lazard Gambit: 1.d4 d5 2.c4 Nc6 3.Nf3 e5 *D08 QGD, [[Albin Countergambit]] and [[Lasker Trap]] *Queen's Gambit Declined: Albin Countergambit: 1.d4 d5 2.c4 e5 *Queen's Gambit Declined: Albin Countergambit, Lasker Trap: 1.d4 d5 2.c4 e5 3.dxe5 d4 4.e3 Bb4+ 5.Bd2 dxe3 *Queen's Gambit Declined: Albin Countergambit, Normal Line: 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 *Queen's Gambit Declined: Albin Countergambit, Tartakower Defense: 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 c5 *Queen's Gambit Declined: Albin Countergambit, Modern Line: 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.Nbd2 *Queen's Gambit Declined: Albin Countergambit, 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 *Queen's Gambit Declined: Albin Countergambit, Janowski Variation: 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.Nbd2 f6 *Queen's Gambit Declined: Albin Countergambit, Balogh Variation: 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.Nbd2 Qe7 *D09 QGD, Albin Countergambit, 5.g3 *Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation: 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3 *Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Be6 Line: 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3 Be6 *Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Bf5 Line: 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3 Bf5 *Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Bg4 Line: 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3 Bg4 *D10 QGD, [[Slav Defence]] *Slav Defense: 1.d4 d5 2.c4 c6 *Slav Defense: Exchange Variation: 1.d4 d5 2.c4 c6 3.cxd5 *Slav Defense: Exchange Variation, Boor Attack: 1.d4 d5 2.c4 c6 3.cxd5 cxd5 4.Nc3 Nf6 5.f3 *Slav Defense: Diemer Gambit: 1.d4 d5 2.c4 c6 3.e4 *Slav Defense: 1.d4 d5 2.c4 c6 3.Nc3 *Slav Defense: 1.d4 d5 2.c4 c6 3.Nc3 dxc4 *Slav Defense: Slav Gambit, Alekhine Attack: 1.d4 d5 2.c4 c6 3.Nc3 dxc4 4.e4 *Slav Defense: Winawer Countergambit: 1.d4 d5 2.c4 c6 3.Nc3 e5 *Slav Defense: Winawer Countergambit, Anti-Winawer Gambit: 1.d4 d5 2.c4 c6 3.Nc3 e5 4.e4 *D11 QGD, Slav Defence, 3.Nf3 *Slav Defense: Modern Line: 1.d4 d5 2.c4 c6 3.Nf3 *Slav Defense: Bonet Gambit: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Bg5 *Slav Defense: Quiet Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 *Slav Defense: Quiet Variation, Pin Defense: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bg4 *Slav Defense: Breyer Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nbd2 *D12 QGD, Slav Defence, 4.e3 Bf5 *Slav Defense: Quiet Variation, Schallopp Defense: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 *Slav Defense: Quiet Variation, Amsterdam Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Nc3 e6 7.Ne5 Nfd7 *Slav Defense: Quiet 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 *D13 QGD, Slav Defence, Exchange Variation *Slav Defense: Exchange Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 *Slav Defense: Exchange Variation, Schallopp Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Nc3 *D14 QGD, Slav Defence, Exchange Variation *Slav Defense: Exchange Variation, Symmetrical Line: 1.d4 d5 2.c4 c6 3.cxd5 cxd5 4.Nc3 Nf6 5.Nf3 Nc6 6.Bf4 Bf5 *Slav Defense: Exchange Variation, 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 *D15 [[QGD; Slav, 4.Nc3|QGD, Slav, 4.Nc3]] *Slav Defense: Three Knights Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 *Slav Defense: Chebanenko Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 a6 *Slav Defense: Chebanenko Variation, Advance System: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 a6 5.c5 *Slav Defense: Two Knights Attack: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 *Slav Defense: Alekhine Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e3 *Slav Defense: Geller Gambit: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e4 *Slav Defense: Geller Gambit: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e4 b5 6.e5 *Slav Defense: Schlechter Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 g6 *Slav Defense: Süchting Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 Qb6 *D16 QGD, Slav Accepted, Alapin Variation *Slav Defense: Alapin Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 *Slav Defense: Steiner Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bg4 *Slav Defense: Soultanbeieff Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 e6 *Slav Defense: Smyslov Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Na6 *D17 QGD, Slav Defence, Czech Defence *Slav Defense: Czech Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 *Slav Defense: Czech Variation, Krause Attack: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 *Slav Defense: Czech Variation, Wiesbaden Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 e6 *Slav Defense: Czech Variation, Wiesbaden Variation, Sharp Line: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 e6 7.f3 Bb4 8.e4 *Slav Defense: Czech Variation, Krause Attack, Fazekas Gambit: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Na6 7.e4 *Slav Defense: Czech 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 *Slav Defense: Czech Variation, Carlsbad Variation, Morozevich 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 9.dxe5 Nxe5 10.Bf4 Nfd7 11.Bg2 g5 *Slav Defense: Czech Variation, Bled Attack: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Nh4 *D18 QGD, Dutch Variation *Slav Defense: Czech Variation, Classical System: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 *Slav Defense: Czech Variation, Lasker Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 Na6 *D19 QGD, Dutch Variation *Slav Defense: Czech Variation, Dutch Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 e6 7.Bxc4 Bb4 8.0-0 *Slav Defense: Czech Variation, Classical System, Main Line: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 e6 7.Bxc4 Bb4 8.0-0 0-0 9.Qe2 *Slav Defense: Czech Variation, Dutch Variation, Sämisch Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 e6 7.Bxc4 Bb4 8.0-0 0-0 9.Qe2 Ne4 10.g4 *D20 [[Queen's Gambit Accepted]] without 3.Nf3 (Central Variation, Old Variation, and atypical moves by White) *Queen's Gambit Accepted: 1.d4 d5 2.c4 dxc4 *Queen's Gambit Accepted: Old Variation: 1.d4 d5 2.c4 dxc4 3.e3 *Queen's Gambit Accepted: Old Variation, Billinger Gambit: 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bxc4 exd4 5.Qb3 Qe7 6.a3 *Queen's Gambit Accepted: Old Variation, Korchnoi Gambit: 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bxc4 exd4 5.Qb3 Qe7 6.Kf1 *Queen's Gambit Accepted: Old Variation, Novikov Gambit: 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bxc4 exd4 5.Qb3 Qe7 6.Nd2 *Queen's Gambit Accepted: Old Variation, Christensen Gambit: 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bxc4 exd4 5.Qb3 Qe7 6.Nf3 *Queen's Gambit Accepted: Saduleto Variation: 1.d4 d5 2.c4 dxc4 3.e4 *Queen's Gambit Accepted: Central Variation, Greco Variation: 1.d4 d5 2.c4 dxc4 3.e4 b5 *Queen's Gambit Accepted: Central Variation, Rubinstein Defense: 1.d4 d5 2.c4 dxc4 3.e4 c5 *Queen's Gambit Accepted: Central Variation, Rubinstein Defense, Yefimov Gambit: 1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5 b5 *Queen's Gambit Accepted: Linares Variation: 1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5 Nf6 5.Nc3 b5 *Queen's Gambit Accepted: Central Variation, McDonnell Defense: 1.d4 d5 2.c4 dxc4 3.e4 e5 *Queen's Gambit Accepted: Central Variation, McDonnell Defense, Somov Gambit: 1.d4 d5 2.c4 dxc4 3.e4 e5 4.Bxc4 *Queen's Gambit Accepted: Schwartz Defense: 1.d4 d5 2.c4 dxc4 3.e4 f5 *Queen's Gambit Accepted: Central Variation, Modern Defense: 1.d4 d5 2.c4 dxc4 3.e4 Nc6 *Queen's Gambit Accepted: Central Variation, Alekhine System: 1.d4 d5 2.c4 dxc4 3.e4 Nf6 *Queen's Gambit Accepted: Accelerated Mannheim Variation: 1.d4 d5 2.c4 dxc4 3.Qa4+ *D21 QGA, 3.Nf3 *Queen's Gambit Accepted: Normal Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 *Queen's Gambit Accepted: Alekhine Defense, Borisenko-Furman Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e4 *Queen's Gambit Accepted: Slav Gambit: 1.d4 d5 2.c4 dxc4 3.Nf3 b5 *Queen's Gambit Accepted: Gunsberg Defense: 1.d4 d5 2.c4 dxc4 3.Nf3 c5 *Queen's Gambit Accepted: Rosenthal Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 e6 *Queen's Gambit Accepted: Godes Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nd7 *D22 QGA, Alekhine Defence (3...a6) *Queen's Gambit Accepted: Alekhine Defense: 1.d4 d5 2.c4 dxc4 3.Nf3 a6 *Queen's Gambit Accepted: Alekhine Defense, Haberditz Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3 b5 *Queen's Gambit Accepted: Alekhine Defense, Alatortsev Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3 Bg4 5.Bxc4 e6 6.d5 *D23 Queen's Gambit Accepted (3...Nf6) *Queen's Gambit Accepted: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 *Queen's Gambit Accepted: Mannheim Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Qa4+ *D24 QGA, 4.Nc3 *Queen's Gambit Accepted: Showalter Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3 *Queen's Gambit Accepted: Bogoljubow Defense: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3 a6 5.e4 *Queen's Gambit Accepted: Gunsberg Defense, Prianishenmo Gambit: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3 c5 5.d5 e6 6.e4 exd5 7.e5 *D25 QGA, 4.e3 *Queen's Gambit Accepted: Normal Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 *Queen's Gambit Accepted: Winawer Defense: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Be6 *Queen's Gambit Accepted: Janowski-Larsen Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Bg4 *Queen's Gambit Accepted: Smyslov Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 g6 *D26 QGA, Classical Variation *Queen's Gambit Accepted: Normal Variation, Traditional System: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 *Queen's Gambit Accepted: Classical Defense: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 *Queen's Gambit Accepted: Classical Defense, Normal Line: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 *Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Exchange Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 cxd4 *Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Development Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 Nc6 *Queen's Gambit Accepted: Classical, Furman Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.Qe2 a6 7.dxc5 Bxc5 8.0-0 Nc6 9.e4 b5 10.e5 *D27 QGA, Classical Variation *Queen's Gambit Accepted: Classical Defense, Russian Gambit: 1.d4 d5 2.c4 dxc4 3.e3 Nf6 4.Bxc4 e6 5.Nf3 c5 6.0-0 a6 7.e4 *Queen's Gambit Accepted: Classical Defense, Main Line: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6 *Queen's Gambit Accepted: Classical Defense, Rubinstein Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6 7.a4 *Queen's Gambit Accepted: Furman Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6 7.dxc5 Bxc5 *D28 QGA, Classical Variation 7.Qe2 *Queen's Gambit Accepted: Classical Defense, Alekhine System: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6 7.Qe2 *Queen's Gambit Accepted: Classical Defense, Alekhine System: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6 7.Qe2 b5 *Queen's Gambit Accepted: Classical, Flohr Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6 7.Qe2 b5 8.Bb3 Nc6 9.Rd1 c4 10.Bc2 Nb4 11.Nc3 Nxc2 12.Qxc2 Bb7 13.d5 Qc7 *D29 QGA, Classical Variation 8...Bb7 *Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6 7.Qe2 b5 8.Bb3 Bb7 *Queen's Gambit Accepted: Classical Defense, Alekhine System, Smyslov Variation: 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6 7.Qe2 b5 8.Bb3 Bb7 9.Rd1 Nbd7 10.Nc3 Bd6 *D30 [[Queen's Gambit Declined]]: Orthodox Defence *Semi-Slav Defense: Quiet Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 e6 5.Nbd2 *Semi-Slav Defense: Quiet Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 e6 5.Nbd2 Nbd7 *Queen's Gambit Declined: Semmering Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 e6 5.Nbd2 Nbd7 6.Bd3 c5 *Queen's Gambit Declined: Stonewall Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 e6 5.Nbd2 Ne4 6.Bd3 f5 *Queen's Gambit Declined: 1.d4 d5 2.c4 e6 *Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch: 1.d4 d5 2.c4 e6 3.Nf3 c5 *Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch Bishop Attack: 1.d4 d5 2.c4 e6 3.Nf3 c5 4.cxd5 exd5 5.Bg5 *Queen's Gambit Declined: Spielmann Variation: 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.Nbd2 g6 *Queen's Gambit Declined: Traditional Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Bg5 *Queen's Gambit Declined: Vienna Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Bg5 Bb4+ *Queen's Gambit Declined: Capablanca Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Bg5 h6 *Queen's Gambit Declined: Capablanca Variation: 1.d4 Nf6 2.Nf3 e6 3.c4 d5 4.Bg5 c6 5.Nbd2 Nbd7 6.e3 *D31 QGD, 3.Nc3 *Queen's Gambit Declined: Queen's Knight Variation: 1.d4 d5 2.c4 e6 3.Nc3 *Queen's Gambit Declined: Janowski Variation: 1.d4 d5 2.c4 e6 3.Nc3 a6 *Queen's Gambit Declined: Charousek Variation: 1.d4 d5 2.c4 e6 3.Nc3 Be7 *Queen's Gambit Declined: Charousek Variation, Miladinovic Gambit: 1.d4 d5 2.c4 e6 3.Nc3 Be7 4.e4 dxe4 5.f3 *Queen's Gambit Declined: Uhlmann Variation: 1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bg5 h6 6.Bh4 0-0 7.Rc1 dxc4 *Semi-Slav Defense: Accelerated Move Order: 1.d4 d5 2.c4 e6 3.Nc3 c6 *Semi-Slav Defense: Anti-Noteboom, Stonewall Variation, Portisch Gambit: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5 5.g4 *Semi-Slav Defense: Marshall Gambit: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 *Semi-Slav Defense: Gunderam Gambit: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.f3 *Semi-Slav Defense: Marshall Gambit, Main Line: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Bd2 *Semi-Slav Defense: Marshall Gambit, Tolush Variation: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Bd2 Qxd4 7.Bxb4 Qxe4+ 8.Be2 c5 9.Bxc5 Qxg2 *Semi-Slav Defense: Marshall Gambit, Forgotten Variation: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Nc3 *Semi-Slav Defense: Noteboom Variation: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 *Queen's Gambit Declined: 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 *Semi-Slav Defense: Noteboom Variation, Abrahams Variation: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.a4 Bb4 6.e3 Bxc3+ 7.bxc3 b5 8.axb5 cxb5 *Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.Bg5 *Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation, Belyavsky Line: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.Bg5 f6 *Queen's Gambit Declined: Semi-Slav, Koomen Variation: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.e3 b5 6.a4 Bb4 7.Bd2 Qe7 *Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Gambit: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.g3 *Queen's Gambit Declined: Semi-Slav, Junge Variation: 1.d4 d5 2.c4 e6 3.Nf3 c6 4.Nc3 dxc4 5.a4 Bb4 6.e3 b5 7.Bd2 Qb6 *Queen's Gambit Declined: Alapin Variation: 1.d4 e6 2.c4 b6 3.Nc3 d5 *D32 QGD, [[Tarrasch Defence]] *Tarrasch Defense: 1.d4 d5 2.c4 e6 3.Nc3 c5 *Tarrasch Defense: Schara Gambit: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4 *Tarrasch Defense: von Hennig Gambit: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4 5.Qxd4 Nc6 6.Qd1 exd5 7.Qxd5 Be6 *Queen's Gambit Declined: Tarrasch Defense: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 *Tarrasch Defense: Tarrasch Gambit: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.dxc5 d4 6.Na4 b5 *Tarrasch Defense: Marshall Gambit: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.e4 *Tarrasch Defense: Two Knights Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 *Tarrasch Defense: Grünfeld Gambit: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.dxc5 d4 7.Na4 b5 *Tarrasch Defense: Symmetrical Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.e3 Nf6 5.Nf3 Nc6 *D33 QGD, Tarrasch, Schlechter–Rubinstein System *Tarrasch Defense: Rubinstein System: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 *Tarrasch Defense: Swedish Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 c4 *Tarrasch Defense: Swedish Variation, Central Break: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 c4 7.e4 *Tarrasch Defense: Prague Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 *Tarrasch Defense: Wagner Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Bg4 *Tarrasch Defense: Dubov Tarrasch: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 cxd4 8.Nxd4 Bc5 *D34 QGD, Tarrasch, 7...Be7 *Tarrasch Defense: Prague Variation, Main Line: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 *Tarrasch Defense: Classical Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.0-0 0-0 *Tarrasch Defense: Classical Variation, Carlsbad Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.0-0 0-0 9.Bg5 *Tarrasch Defense: Classical Variation, Endgame Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.0-0 0-0 9.Bg5 Be6 *Tarrasch Defense: Classical Variation, Advance Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.0-0 0-0 9.Bg5 c4 *Tarrasch Defense: Classical Variation, Spassky Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.0-0 0-0 9.Bg5 cxd4 10.Nxd4 h6 11.Be3 Bg4 *Tarrasch Defense: Classical Variation, Main Line: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.0-0 0-0 9.Bg5 cxd4 10.Nxd4 h6 11.Be3 Re8 *Tarrasch Defense: Classical Variation, Chandler Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.0-0 0-0 9.Bg5 cxd4 10.Nxd4 h6 11.Be3 Re8 12.Rc1 Be6 *Tarrasch Defense: Classical Variation, Petursson Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.0-0 0-0 9.Bg5 cxd4 10.Nxd4 Re8 *Tarrasch Defense: Classical Variation, Réti Variation: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.0-0 0-0 9.dxc5 Bxc5 10.Na4 *Tarrasch Defense: Classical Variation, Classical Tarrasch Gambit: 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.0-0 0-0 9.dxc5 d4 *Queen's Gambit Declined: Tarrasch Defense, Stoltz Variation: 1.d4 d5 2.c4 e6 3.Nf3 c5 4.cxd5 exd5 5.g3 Nc6 6.Bg2 Nf6 7.0-0 Be7 8.Nc3 0-0 9.Bg5 Be6 10.Rc1 b6 *Tarrasch Defense: Classical Variation, Bogoljubow Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 c5 4.Nf3 d5 5.cxd5 exd5 6.g3 Nc6 7.Bg2 Be7 8.0-0 0-0 9.Bg5 Be6 10.Rc1 c4 *D35 QGD, Exchange Variation *Queen's Gambit Declined: Normal Defense: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 *Queen's Gambit Declined: Harrwitz Attack: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bf4 *Queen's Gambit Declined: Exchange Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 *Queen's Gambit Declined: Exchange Variation, Positional Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 exd5 5.Bg5 *Queen's Gambit Declined: Exchange Variation, Chameleon Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 exd5 5.Bg5 Be7 6.e3 0-0 7.Bd3 Nbd7 8.Qc2 Re8 9.Nge2 Nf8 10.0-0-0 *Queen's Gambit Declined: Exchange Variation, Positional Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 exd5 5.Bg5 c6 *Queen's Gambit Declined: Exchange Variation, Sämisch Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Nbd7 5.cxd5 exd5 6.Bf4 *D36 QGD, Exchange, positional line, 6.Qc2 *Queen's Gambit Declined: Exchange Variation, Reshevsky Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 exd5 5.Bg5 c6 6.Qc2 *D37 QGD, 4.Nf3 *Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense: 1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bf4 0-0 6.e3 b6 *Queen's Gambit Declined: Harrwitz Attack, Orthodox Defense: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Be7 5.Bf4 0-0 6.e3 c6 *Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line: 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Nf3 Be7 5.Bf4 0-0 6.e3 Nbd7 7.c5 *Queen's Gambit Declined: Three Knights Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 *Queen's Gambit Declined: Harrwitz Attack: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bf4 *Queen's Gambit Declined: Harrwitz Attack, Main Line: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bf4 0-0 6.e3 c5 7.dxc5 Bxc5 *Queen's Gambit Declined: Harrwitz Attack: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bf4 0-0 6.e3 c5 7.dxc5 Bxc5 8.Qc2 Nc6 9.a3 Qa5 10.0-0-0 *Queen's Gambit Declined: Harrwitz Attack: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bf4 0-0 6.e3 c5 7.dxc5 Bxc5 8.Qc2 Nc6 9.Rd1 Qa5 10.a3 *Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bf4 0-0 6.e3 Nbd7 *Queen's Gambit Declined: Miles Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.Qc2 *Queen's Gambit Declined: Three Knights, Vienna Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 dxc4 *Queen's Gambit Declined: Vienna Variation, Quiet Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 dxc4 5.e3 *Queen's Gambit Declined: Barmen Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Nbd7 *Queen's Gambit Declined: Knight Defense, Alekhine Gambit: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Nbd7 5.Bg5 h6 6.Bh4 dxc4 *D38 QGD, Ragozin Variation *Queen's Gambit Declined: Ragozin Defense: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Bb4 *Queen's Gambit Declined: Westphalian Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Bb4 5.Bg5 Nbd7 6.e3 c5 *Queen's Gambit Declined: Ragozin Defense, Alekhine Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Bb4 5.Qa4+ *D39 QGD, Ragozin, Vienna Variation *Queen's Gambit Declined: Ragozin Defense, Vienna Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Bb4 5.Bg5 dxc4 *D40 QGD, [[Semi-Tarrasch Defence]] *Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.Bg5 *Queen's Gambit Declined: Semi-Tarrasch Defense, Symmetrical Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.e3 Nc6 6.Bd3 Bd6 7.0-0 0-0 *Queen's Gambit Declined: Semi-Tarrasch Defense, Levenfish Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.e3 Nc6 6.Bd3 Bd6 7.0-0 0-0 8.Qe2 Qe7 9.dxc5 Bxc5 10.e4 *Queen's Gambit Declined: Semi-Tarrasch Defense: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 *D41 QGD, Semi-Tarrasch, 5.cxd5 *Queen's Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 c5 7.Nf3 cxd4 8.cxd4 Bb4+ 9.Bd2 Qa5 *Queen's Gambit Declined: Semi-Tarrasch Defense, 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 0-0 11.Bb5 *Queen's Gambit Declined: Semi-Tarrasch Defense: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 *Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 Nxd5 6.e3 *Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 Nxd5 6.e4 *D42 QGD, Semi-Tarrasch, 7.Bd3 *Queen's Gambit Declined: Semi-Tarrasch Defense, Main Line: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 Nxd5 6.e3 Nc6 7.Bd3 *D43 QGD, [[Semi-Slav Defence]] *Semi-Slav Defense: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 *Semi-Slav Defense: Anti-Moscow Gambit: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 h6 6.Bh4 *Queen's Gambit Declined: Hastings Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 h6 6.Bxf6 Qxf6 7.Qb3 *D44 [[QGD; Semi-Slav 5.Bg5 dxc4|QGD, Semi-Slav, 5.Bg5 dxc4]] *Semi-Slav Defense Accepted: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 dxc4 *Semi-Slav Defense: Botvinnik Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 dxc4 6.e4 *Semi-Slav Defense: Botvinnik Variation, Ekstrom Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.exf6 gxh4 10.Ne5 *Semi-Slav Defense: Botvinnik Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.Nxg5 *Semi-Slav Defense: Botvinnik Variation, Lilienthal Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 11.g3 *Semi-Slav Defense: Botvinnik Variation, Szabo Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.Nxg5 hxg5 10.Bxg5 Nbd7 11.Qf3 *Semi-Slav Defense: Botvinnik Variation, Alatortsev System: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c6 5.Bg5 dxc4 6.e4 b5 7.e5 h6 8.Bh4 g5 9.Nxg5 Nd5 *D45 QGD, Semi-Slav, 5.e3 *Semi-Slav Defense: Main Line: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 *Semi-Slav Defense: Accelerated Meran Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 a6 *Semi-Slav Defense: Normal Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 *Semi-Slav Defense: Stoltz Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Qc2 *Semi-Slav Defense: Stoltz Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Qc2 b6 7.b3 *Semi-Slav Defense: Stoltz Variation, Center Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Qc2 Bd6 7.e4 *Semi-Slav Defense: Stoltz Variation, Center Variation, Mikhalchishin Line: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Qc2 Bd6 7.e4 dxe4 8.Nxe4 Nxe4 9.Qxe4 e5 10.dxe5 *Semi-Slav Defense: Stoltz Variation, Shabalov Attack: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Qc2 Bd6 7.g4 *Semi-Slav Defense: Rubinstein System: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 Nf6 5.e3 Nbd7 6.Ne5 *Semi-Slav Defense: Stoltz Variation: 1.d4 d5 2.Nf3 Nf6 3.c4 c6 4.e3 e6 5.Nc3 Nbd7 6.Qc2 Bd6 7.b3 *Semi-Slav Defense: Stoltz Variation: 1.d4 d5 2.Nf3 Nf6 3.c4 c6 4.e3 e6 5.Nc3 Nbd7 6.Qc2 Bd6 7.b3 0-0 8.Bb2 *Semi-Slav Defense: Stonewall Defense: 1.d4 d5 2.Nf3 Nf6 3.c4 c6 4.Nc3 e6 5.e3 Ne4 6.Bd3 f5 *D46 QGD, Semi-Slav, 6.Bd3 *Semi-Slav Defense: Main Line: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 *Semi-Slav Defense: Romih Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 Bb4 *Semi-Slav Defense: Chigorin Defense: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 Bd6 *Semi-Slav Defense: Chigorin Defense: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 Bd6 7.Qc2 *Semi-Slav Defense: Bogoljubow Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 Be7 *Semi-Slav Defense: Main Line: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Qc2 b6 7.b3 Bb7 8.Bd3 Be7 9.0-0 0-0 10.Bb2 *D47 QGD, Semi-Slav, 7.Bc4 *Semi-Slav Defense: Semi-Meran Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 *Semi-Slav Defense: Meran Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 *Semi-Slav Defense: Meran Variation, Wade Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 *Semi-Slav Defense: Meran Variation, Wade Variation, Larsen Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.e4 b4 10.Na4 c5 11.e5 Nd5 *Semi-Slav Defense: Meran Variation, Wade Variation, Kaidanov Gambit: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.e4 b4 10.Na4 c5 11.e5 Nd5 12.0-0 cxd4 13.Nxd4 *Semi-Slav Defense: Meran Variation, Lundin Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4 *D48 QGD, Meran, 8...a6 *Semi-Slav Defense: Meran Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 *Semi-Slav Defense: Meran Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 *Semi-Slav Defense: Meran Variation, Old Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 *Semi-Slav Defense: Meran Variation, Reynolds' Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.d5 *Semi-Slav Defense: Meran Variation, Pirc Variation: 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 Nf6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 b4 *D49 QGD, Meran, 11.Nxb5 *Semi-Slav Defense: Meran Variation, Blumenfeld Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 *Semi-Slav Defense: Meran Variation, Rabinovich Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Ng4 *Semi-Slav Defense: Meran Variation, Stahlberg Variation: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Nxe5 12.Nxe5 axb5 13.Qf3 *Semi-Slav Defense: Meran Variation, Rellstab Attack: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.Nf3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Nxe5 12.Nxe5 axb5 13.0-0 Qd5 14.Qe2 Ba6 15.Bg5 *Semi-Slav Defense: Meran Variation, Sozin Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Nxe5 *Semi-Slav Defense: Meran Variation, Sozin Variation: 1.d4 d5 2.Nf3 Nf6 3.c4 c6 4.Nc3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Nxe5 12.Nxe5 axb5 13.0-0 *D50 QGD, 4.Bg5 *Queen's Gambit Declined: Modern Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 *Queen's Gambit Declined: Been-Koomen Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 *Queen's Gambit Declined: Pseudo-Tarrasch Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.cxd5 *Queen's Gambit Declined: Pseudo-Tarrasch Variation, Canal Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.cxd5 Qb6 *Queen's Gambit Declined: Semi-Tarrasch Defense, 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 *Queen's Gambit Declined: Pseudo-Tarrasch Variation, Primitive Pillsbury Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.Nf3 cxd4 6.Qxd4 *D51 QGD, 4.Bg5 Nbd7 ([[Cambridge Springs Defence]] and [[Elephant Trap]]) *Queen's Gambit Declined: Modern Variation, Knight Defense: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 *Queen's Gambit Declined: Modern Variation, Knight Defense: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 *Queen's Gambit Declined: Manhattan Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 Bb4 *Queen's Gambit Declined: Modern Variation, Knight Defense: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 *Queen's Gambit Declined: Capablanca Variation, Anti-Cambridge Springs Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.a3 *Queen's Gambit Declined: Alekhine Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.Nf3 c6 6.e4 *Queen's Gambit Declined: Rochlin Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.Nf3 c6 6.Rc1 Qa5 7.Bd2 *D52 QGD *Queen's Gambit Declined: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 Nbd7 6.e3 *Queen's Gambit Declined: Cambridge Springs Defense: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 Nbd7 6.e3 Qa5 *Queen's Gambit Declined: Cambridge Springs Defense: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 Nbd7 6.e3 Qa5 7.cxd5 *Queen's Gambit Declined: Cambridge Springs Defense, Yugoslav Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 Nbd7 6.e3 Qa5 7.cxd5 Nxd5 *Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 Nbd7 6.e3 Qa5 7.Nd2 Bb4 8.Qc2 *Queen's Gambit Declined: Cambridge Springs Defense, Rubinstein Variation: 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 Nbd7 6.e3 Qa5 7.Nd2 dxc4 *Queen's Gambit Declined: Cambridge Springs Defense, Capablanca Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5 7.Bxf6 *Queen's Gambit Declined: Cambridge Springs Defense, 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 0-0 9.Bh4 *D53 QGD, 4.Bg5 Be7 *Queen's Gambit Declined: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 *Queen's Gambit Declined: Modern Variation, Heral Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.Bxf6 *Queen's Gambit Declined: Lasker Defense: 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Bg5 Be7 5.e3 Ne4 *D54 QGD, Anti-ne0-0rthodox Variation *Queen's Gambit Declined: Ne0-0rthodox Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Bg5 Be7 5.e3 0-0 6.Rc1 *D55 QGD, 6.Nf3 *Queen's Gambit Declined: Pillsbury Attack: 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 d5 5.cxd5 exd5 6.Bg5 Be7 7.e3 0-0 8.Bd3 Bb7 9.Ne5 *Queen's Gambit Declined: Ne0-0rthodox Variation, Main Line: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 h6 6.Bh4 0-0 7.e3 *Queen's Gambit Declined: Anti-Tartakower Variation, Petrosian Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 h6 6.Bxf6 Bxf6 7.e3 0-0 8.Rc1 c6 9.Bd3 Nd7 10.0-0 dxc4 11.Bxc4 *Queen's Gambit Declined: Modern Variation, Normal Line: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 *Queen's Gambit Declined: Ne0-0rthodox Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 h6 *Queen's Gambit Declined: Anti-Tartakower Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 h6 7.Bxf6 *D56 QGD, [[Queen's Gambit Declined#4.Bg5 Systems|Lasker Defence]] *Queen's Gambit Declined: Lasker Defense: 1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bg5 h6 6.Bh4 0-0 7.e3 Ne4 *Queen's Gambit Declined: Lasker Defense, Russian Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7 9.Qc2 Nf6 10.Bd3 dxc4 11.Bxc4 c5 12.0-0 Nc6 13.Rfd1 Bd7 *Queen's Gambit Declined: Lasker Defense, Teichmann Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 h6 6.Bh4 0-0 7.e3 Ne4 8.Bxe7 Qxe7 9.Qc2 *D57 QGD, [[Queen's Gambit Declined#4.Bg5 Systems|Lasker Defence, Main line]] *Queen's Gambit Declined: Lasker Defense, Main Line: 1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bg5 h6 6.Bh4 0-0 7.e3 Ne4 8.Bxe7 Qxe7 9.cxd5 Nxc3 10.bxc3 *Queen's Gambit Declined: Lasker Defense, Bernstein Variation, Mar del Plata Gambit: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7 9.cxd5 Nxc3 10.bxc3 exd5 11.Qb3 Rd8 12.c4 Be6 *Queen's Gambit Declined: Lasker Defense, Bernstein Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Bg5 Be7 5.e3 h6 6.Bh4 0-0 7.Nf3 Ne4 8.Bxe7 Qxe7 9.cxd5 Nxc3 10.bxc3 exd5 11.Qb3 Qd6 *D58 QGD, Tartakower (Tartakower–Makogonov–Bondarevsky) System *Queen's Gambit Declined: Tartakower Defense, Exchange Variation: 1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bg5 h6 6.Bh4 0-0 7.e3 b6 8.cxd5 exd5 *Queen's Gambit Declined: Tartakower Defense: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 h6 6.Bh4 0-0 7.e3 b6 *D59 QGD, Tartakower (Tartakower–Makogonov–Bondarevsky) System, 8.cxd5 Nxd5 *Queen's Gambit Declined: Tartakower Defense, Makogonov Exchange Variation: 1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bg5 h6 6.Bh4 0-0 7.e3 b6 8.cxd5 Nxd5 *Queen's Gambit Declined: Tartakower Defense: 1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bg5 h6 6.Bh4 0-0 7.e3 b6 8.cxd5 Nxd5 9.Bxe7 Qxe7 10.Nxd5 exd5 11.Rc1 Be6 *D60 QGD, Orthodox Defence *Queen's Gambit Declined: Orthodox Defense, Rauzer Variation: 1.d4 d5 2.Nf3 Nf6 3.c4 e6 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Qb3 *Queen's Gambit Declined: Orthodox Defense: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 *Queen's Gambit Declined: Orthodox Defense, Botvinnik Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Bd3 *D61 QGD, Orthodox Defence, Rubinstein Variation *Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Qc2 *D62 QGD, Orthodox Defence, 7.Qc2 c5, 8.cxd5 (Rubinstein) *Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation, Flohr Line: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Qc2 c5 8.cxd5 *D63 QGD, Orthodox Defence, 7.Rc1 *Queen's Gambit Declined: Orthodox Defense, Pillsbury Variation: 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 b6 8.cxd5 exd5 9.Bd3 *Queen's Gambit Declined: Orthodox Defense, Main Line: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 *Queen's Gambit Declined: Orthodox Defense, Henneberger Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 a6 *Queen's Gambit Declined: Orthodox Defense, Swiss, Carlsbad Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 a6 8.cxd5 *Queen's Gambit Declined: Orthodox Defense, Main Line: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 c6 *Queen's Gambit Declined: Orthodox Defense, Capablanca Variation: 1.Nf3 d5 2.d4 Nf6 3.c4 e6 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 b6 8.cxd5 exd5 9.Bb5 *D64 QGD, Orthodox Defence, Rubinstein Attack (with Rc1) *Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack: 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Nf3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 c6 8.a3 a6 9.Qc2 *Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 c6 8.Qc2 *Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 c6 8.Qc2 a6 *Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack: 1.Nf3 d5 2.d4 Nf6 3.c4 e6 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 c6 8.Qc2 Ne4 *D65 QGD, Orthodox Defence, Rubinstein Attack, Main line *Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack: 1.d4 d5 2.Nf3 Nf6 3.c4 e6 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 c6 8.Qc2 a6 9.cxd5 *D66 QGD, Orthodox Defence, Bd3 line including [[Rubinstein Trap]] *Queen's Gambit Declined: Orthodox Defense, Bd3 Line: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 *Queen's Gambit Declined: Orthodox Defense, Fianchetto Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c6 5.Nf3 Be7 6.e3 Nbd7 7.Rc1 0-0 8.Bd3 dxc4 9.Bxc4 b5 *D67 QGD, Orthodox Defence, Bd3 line, Capablanca freeing manoeuvre *Queen's Gambit Declined: Orthodox Defense, Capablanca System: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 *Queen's Gambit Declined: Orthodox Defense, Bd3 Line: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 *Queen's Gambit Declined: Orthodox Defense, Alekhine Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.Ne4 *Queen's Gambit Declined: Orthodox Defense, Main Line: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.0-0 *Queen's Gambit Declined: Orthodox Defense, Janowski Variation: 1.d4 d5 2.Nf3 Nf6 3.c4 e6 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.h4 *D68 QGD, Orthodox Defence, Classical Variation *Queen's Gambit Declined: Orthodox Defense, Classical Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.0-0 Nxc3 12.Rxc3 e5 *Queen's Gambit Declined: Orthodox Defense, Classical Variation: 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.0-0 Nxc3 12.Rxc3 e5 13.Qb1 *Queen's Gambit Declined: Orthodox Defense, Classical Variation: 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 6.e3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.0-0 Nxc3 12.Rxc3 e5 13.Qc2 *D69 QGD, Orthodox Defence, Classical, 13.dxe5 *Queen's Gambit Declined: Orthodox Defense, Classical Variation: 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 0-0 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.0-0 Nxc3 12.Rxc3 e5 13.dxe5 Nxe5 14.Nxe5 Qxe5 ===D70–D99=== 1.d4 Nf6 2.c4 g6 with 3...d5: [[Grünfeld Defence]] *[[D70 Neo-Grünfeld Defence]] *Neo-Grünfeld Defense: Goglidze Attack: 1.d4 Nf6 2.c4 g6 3.f3 d5 *Neo-Grünfeld Defense: with g3: 1.d4 Nf6 2.c4 g6 3.g3 d5 *Neo-Grünfeld Defense: with Nf3: 1.d4 Nf6 2.c4 g6 3.Nf3 d5 *D71 Neo-Grünfeld, 5.cxd5 *Neo-Grünfeld Defense: Exchange Variation: 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5 5.cxd5 Nxd5 *D72 Neo-Grünfeld, 5.cxd5, Main line *1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.cxd5 *D73 Neo-Grünfeld, 5.Nf3 *1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 *D74 Neo-Grünfeld, 6.cxd5 Nxd5, 7.0-0 *Neo-Grünfeld Defense: Delayed Exchange Variation: 1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 0-0 5.Bg2 d5 6.cxd5 Nxd5 7.0-0 *D75 Neo-Grünfeld, 6.cxd5 Nxd5, 7.0-0 c5, 8.Nc3 *Neo-Grünfeld Defense: Delayed Exchange Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 0-0 5.g3 d5 6.cxd5 Nxd5 7.Bg2 c5 8.0-0 *Neo-Grünfeld Defense: Delayed Exchange Variation: 1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.g3 0-0 5.Bg2 d5 6.cxd5 Nxd5 7.0-0 c5 8.dxc5 *D76 Neo-Grünfeld, 6.cxd5 Nxd5, 7.0-0 Nb6 *Neo-Grünfeld Defense: Delayed Exchange Variation: 1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 0-0 5.Bg2 d5 6.cxd5 Nxd5 7.0-0 Nb6 *D77 Neo-Grünfeld, 6.0-0 *Neo-Grünfeld Defense: Classical Variation: 1.d4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 0-0 5.0-0 d5 6.c4 *Neo-Grünfeld Defense: Classical Variation, Modern Defense: 1.d4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 0-0 5.0-0 d5 6.c4 dxc4 *Neo-Grünfeld Defense: Classical Variation, Polgar Variation: 1.d4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 0-0 5.0-0 d5 6.c4 Nc6 *D78 Neo-Grünfeld, 6.0-0 c6 *Neo-Grünfeld Defense: Classical Variation, Original Defense: 1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 0-0 5.Bg2 c6 6.0-0 d5 *D79 Neo-Grünfeld, 6.0-0, Main line *Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation: 1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 0-0 5.Bg2 c6 6.0-0 d5 7.cxd5 cxd5 *D80 [[Grünfeld Defence]] *Grünfeld Defense: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 *Grünfeld Defense: Stockholm Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5 *Grünfeld Defense: Lundin Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5 Ne4 5.Nxe4 dxe4 6.Qd2 c5 *Grünfeld Defense: Lutikov Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3 *Grünfeld Defense: Lutikov Variation, Murrey Attack: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3 c5 5.cxd5 Nxd5 6.Na4 *Grünfeld Defense: Gibbon Gambit: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.g4 *Grünfeld Defense: Zaitsev Gambit: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.h4 *D81 Grünfeld, Russian Variation *Grünfeld Defense: Russian Variation, Accelerated Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Qb3 *D82 Grünfeld, 4.Bf4 *Grünfeld Defense: Brinckmann Attack: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 *D83 Grünfeld Gambit *Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 0-0 *Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Capablanca Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 0-0 6.Rc1 *Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Botvinnik Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 0-0 6.Rc1 c5 7.dxc5 Be6 *Grünfeld Defense: Brinckmann Attack, Reshevsky Gambit: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.Rc1 0-0 6.e3 c5 7.dxc5 Qa5 *D84 Grünfeld Gambit Accepted *Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit Accepted: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 0-0 6.cxd5 Nxd5 7.Nxd5 Qxd5 8.Bxc7 *D85 Grünfeld, [[Grünfeld Defence, Nadanian Variation|Nadanian Variation]] *Grünfeld Defense: Exchange Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 *Grünfeld Defense: Exchange Variation, Modern Exchange Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 *Grünfeld Defense: Exchange Variation, Modern Exchange Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 *Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Pawn Grab Line: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.Rb1 0-0 9.Be2 Nc6 10.d5 Bxc3+ *Grünfeld Defense: Exchange Variation, Nadanian Attack: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.Na4 *Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Kramnik's Line: 1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.Nc3 d5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 c5 8.h3 *Grünfeld Defense: Exchange Variation, Modern Exchange Variation: 1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.Nc3 d5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 c5 8.Rb1 *D86 Grünfeld, Exchange, Classical Variation *Grünfeld Defense: Exchange Variation, Classical Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 *Grünfeld Defense: Exchange Variation, Simagin's Lesser Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 0-0 8.Ne2 b6 *Grünfeld Defense: Exchange Variation, Simagin's Improved Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 0-0 8.Ne2 Nc6 *Grünfeld Defense: Exchange Variation, Larsen Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 0-0 8.Ne2 Qd7 *Grünfeld Defense: Exchange Variation, Larsen Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 0-0 8.Ne2 Qd7 9.0-0 b6 *D87 Grünfeld, Exchange, Spassky Variation *Grünfeld Defense: Exchange Variation, Seville Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 Nc6 9.Be3 0-0 10.0-0 Bg4 11.f3 Na5 12.Bxf7+ *Grünfeld Defense: Exchange Variation, Spassky Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 0-0 *D88 Grünfeld, Spassky Variation, Main line, 10...cxd4, 11.cxd4 *Grünfeld Defense: Exchange Variation, Spassky Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 Nc6 9.Be3 0-0 10.0-0 cxd4 11.cxd4 *D89 Grünfeld, Spassky Variation, Main line, 13.Bd3 *Grünfeld Defense: Exchange Variation, Spassky Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 Nc6 9.Be3 0-0 10.0-0 Bg4 11.f3 Na5 12.Bd3 cxd4 13.cxd4 Be6 *Grünfeld Defense: Exchange Variation, Sokolsky Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 0-0 9.0-0 Nc6 10.Be3 Bg4 11.f3 Na5 12.Bd3 cxd4 13.cxd4 Be6 14.d5 *D90 Grünfeld, Three Knights Variation *Grünfeld Defense: Three Knights Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 *Grünfeld Defense: Three Knights Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 *Grünfeld Defense: Flohr Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qa4+ *D91 Grünfeld, Three Knights Variation *Grünfeld Defense: Three Knights Variation, Petrosian System: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5 *D92 Grünfeld, 5.Bf4 *Grünfeld Defense: Three Knights Variation, Hungarian Attack: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4 *D93 Grünfeld with 5.Bf4 0-0 6.e3 *Grünfeld Defense: Three Knights Variation, Hungarian Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4 0-0 6.e3 *D94 Grünfeld, 5.e3 *Grünfeld Defense: Flohr Defense: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 g6 5.Nf3 Bg7 6.Bd3 0-0 7.0-0 Bf5 *Grünfeld Defense: Smyslov Defense: 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 g6 5.Nf3 Bg7 6.Bd3 0-0 7.0-0 Bg4 *Grünfeld Defense: Three Knights Variation, Burille Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 *Grünfeld Defense: Makogonov Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 0-0 6.b4 *Grünfeld Defense: Opocensky Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 0-0 6.Bd2 *Grünfeld Defense: Three Knights Variation, Paris Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 0-0 6.Bd3 *D95 Grünfeld with 5.e3 0-0 6.Qb3 *Grünfeld Defense: Pachman Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Qb3 dxc4 6.Bxc4 0-0 7.Nf3 Nbd7 8.Ng5 *Grünfeld Defense: Three Knights Variation, Vienna Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 0-0 6.Qb3 *Grünfeld Defense: Botvinnik Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 0-0 6.Qb3 e6 *D96 Grünfeld, Russian Variation *Grünfeld Defense: Russian Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 *D97 Grünfeld, Russian Variation with 7.e4 *Grünfeld Defense: Russian Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 *Grünfeld Defense: Russian Variation, Hungarian Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 a6 *Grünfeld Defense: Russian Variation, Levenfish Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 b6 *Grünfeld Defense: Russian Variation, Szabo Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 c6 *Grünfeld Defense: Russian Variation, Prins Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 Na6 *Grünfeld Defense: Russian Variation, Byrne Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 Nc6 *D98 Grünfeld, Russian, Smyslov Variation *Grünfeld Defense: Russian Variation, Smyslov Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 Bg4 *Grünfeld Defense: Russian Variation, Keres Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 Bg4 8.Be3 Nfd7 9.Be2 Nb6 10.Qd3 Nc6 11.0-0-0 *D99 Grünfeld Defence, Smyslov, Main line *Grünfeld Defense: Russian Variation, Smyslov Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 Bg4 8.Be3 Nfd7 9.Qb3 *Grünfeld Defense: Russian Variation, Yugoslav Variation: 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 0-0 7.e4 Bg4 8.Be3 Nfd7 9.Qb3 c5
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