Openings List doc
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Aachen Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.exd5 Nb4 Abbazia Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 d5 4.exd5 Nf6 Abonyi Variation, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Nec6 Abrahams Variation, Sicilian Wing Gambit 1.e4 c5 2.b4 cxb4 3.Bb2 Abrahams; Noteboom; Klaus Junge Var, QGD 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.a4 Bb4 6.e3 b5 7.Bd2 a5 Accelerated Averbakh Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Bg5 Accelerated Dragon; Fianchetto Var; B34 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 Accelerated Fianchetto, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 Accelerated Gurgenidze 1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.Nc3 c6 Accelerated Paulsen, Sicilian 1.e4 c5 2.Nf3 Qc7 Accelerated Russian Variation, Grunfeld; D81 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Qb3 Accelerated Saemisch Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 Accelerated Wimpy Variation, Sic 1.e4 c5 2.Nf3 e6 3.d4 cxd4 Acclerated Meran, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 a6 Action Extension, Sicilian 1.e4 c5 2.Nf3 g6 3.c4 Bh6 Adam Variation, Ruy Lopez 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 Adams Attack, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.h3 Adams Defense 1.e4 Nh6 Adams Gambit, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Nc6 6.d4 Adler Variation, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Nf3 Adorjan System, English 1.c4 g6 2.e4 e5 Advance System, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 c5 Advance Variation, Caro 1.e4 c6 2.d4 d5 3.e5 Advance Variation, French; C02 1.e4 e6 2.d4 d5 3.e5 Advance Variation, Sicilian 1.e4 c5 2.Nf3 Nf6 3.e5 Advance Variation, Tarrasch 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 c4 Advance; Nimzovich; Steinitz Var, Fr 1.e4 e6 2.d4 d5 3.e5 Bd7 Afincourt Variation, English 1.c4 e6 2.Nf3 d5 3.g3 Aged Gibbon Gambit 1.d4 Nf6 2.c4 d6 3.g4 Agincourt; Kurajica Defense, English; A13 1.c4 e6 Akahi Variation 1.e3 e5 2.Nc3 Nf6 3.f4 exf4 4.Nf3 Alapin Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bb4 Alapin Formation, Smith-Morra Declined, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 Nf6 Alapin Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bb4 4.c3 Ba5 5.Bxc6 dxc6 Alapin Gambit, Ruy Lopez Exchange 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Bg4 6.h3 h5 Alapin Opening 1.e4 e5 2.Ne2 Alapin Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Nb5 Alapin Variation, QGD 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.Nbd2 Alapin Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 b6 Alapin Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6 6.d4 f6 Alapin Variation, Slav; D16 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Alapin Variation, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 Alapin; Sveshnikov Var, Sicilian; B22 1.e4 c5 2.c3 Alapin; Ulvestad; Manhattan; Kmoch Variation, Dutch 1.d4 f5 2.Qd3 Alapin; Witaker Gambit, French 1.e4 e6 2.d4 d5 3.Be3 Alapin-Blackburne Gambit, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Bg4 4.dxe5 Nd7 Alapin-Diemer Gambit, French 1.e4 e6 2.d4 d5 3.Be3 dxe4 4.f3 Alapin's Defense Deferred, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Bb4 Alatortsev System, Semi-Slav 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 Alatortsev; Petrosian, Charousek Var, QGD 1.d4 d5 2.c4 e6 3.Nc3 Be7 Albin Countergambit; Cavalotti Var, QGD; D08 1.d4 d5 2.c4 e5
Transcript of Openings List doc
Aachen Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.exd5 Nb4Abbazia Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 d5 4.exd5 Nf6Abonyi Variation, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Nec6Abrahams Variation, Sicilian Wing Gambit 1.e4 c5 2.b4 cxb4 3.Bb2Abrahams; Noteboom; Klaus Junge Var, QGD 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.a4 Bb4 6.e3 b5 7.Bd2 a5Accelerated Averbakh Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Bg5Accelerated Dragon; Fianchetto Var; B34 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6Accelerated Fianchetto, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5Accelerated Gurgenidze 1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.Nc3 c6Accelerated Paulsen, Sicilian 1.e4 c5 2.Nf3 Qc7Accelerated Russian Variation, Grunfeld; D81 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Qb3Accelerated Saemisch Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3Accelerated Wimpy Variation, Sic 1.e4 c5 2.Nf3 e6 3.d4 cxd4Acclerated Meran, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 a6Action Extension, Sicilian 1.e4 c5 2.Nf3 g6 3.c4 Bh6Adam Variation, Ruy Lopez 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.c4Adams Attack, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.h3Adams Defense 1.e4 Nh6Adams Gambit, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Nc6 6.d4Adler Variation, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Nf3Adorjan System, English 1.c4 g6 2.e4 e5Advance System, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 c5Advance Variation, Caro 1.e4 c6 2.d4 d5 3.e5 Advance Variation, French; C02 1.e4 e6 2.d4 d5 3.e5Advance Variation, Sicilian 1.e4 c5 2.Nf3 Nf6 3.e5Advance Variation, Tarrasch 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 c4Advance; Nimzovich; Steinitz Var, Fr 1.e4 e6 2.d4 d5 3.e5 Bd7Afincourt Variation, English 1.c4 e6 2.Nf3 d5 3.g3Aged Gibbon Gambit 1.d4 Nf6 2.c4 d6 3.g4Agincourt; Kurajica Defense, English; A13 1.c4 e6Akahi Variation 1.e3 e5 2.Nc3 Nf6 3.f4 exf4 4.Nf3Alapin Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bb4Alapin Formation, Smith-Morra Declined, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 Nf6Alapin Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bb4 4.c3 Ba5 5.Bxc6 dxc6Alapin Gambit, Ruy Lopez Exchange 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Bg4 6.h3 h5Alapin Opening 1.e4 e5 2.Ne2Alapin Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Nb5Alapin Variation, QGD 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.Nbd2Alapin Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 b6Alapin Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6 6.d4 f6Alapin Variation, Slav; D16 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4Alapin Variation, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4Alapin; Sveshnikov Var, Sicilian; B22 1.e4 c5 2.c3Alapin; Ulvestad; Manhattan; Kmoch Variation, Dutch 1.d4 f5 2.Qd3 Alapin; Witaker Gambit, French 1.e4 e6 2.d4 d5 3.Be3Alapin-Blackburne Gambit, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Bg4 4.dxe5 Nd7Alapin-Diemer Gambit, French 1.e4 e6 2.d4 d5 3.Be3 dxe4 4.f3Alapin's Defense Deferred, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Bb4Alatortsev System, Semi-Slav 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 Nd5Alatortsev; Petrosian, Charousek Var, QGD 1.d4 d5 2.c4 e6 3.Nc3 Be7Albin Countergambit; Cavalotti Var, QGD; D08 1.d4 d5 2.c4 e5Albin Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.O-OAlbin-Chatard Gambit, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 Bxg5 7.hxg5 Qxg5
Albrecht; Karlshruhle Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 g6Alburt Defense, QP 1.d4 d5 2.Nc3 Bf5Alburt Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6Alekhine (Maroczy) Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Ne2Alekhine Attack, Slav 1.d4 d5 2.c4 c6 3.Nc3 dxc4 4.e4Alekhine Defense, QGD 1.d4 d5 2.c4 g6 Alekhine Gambit, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.Nf3 h6 6.Bh4 dxc4Alekhine Gambit, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.e5Alekhine Line, Sicilian Dragon 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 a5Alekhine System, Classical Defense, QGA; D28 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2Alekhine System, QGA 1.d4 d5 2.c4 dxc4 3.e4 Nf6Alekhine Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.c4Alekhine Variation, Catalan 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Qxc4 a6 7.Qc2Alekhine Variation, Chigorin Defense 1.d4 d5 2.c4 Nc6 3.Nf3 Bg4 4.Qa4Alekhine Variation, Dutch 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O Ne4Alekhine Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 a6Alekhine Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3 Bg4Alekhine Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4 5.Qa4Alekhine Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.Nf3 c6 6.e4Alekhine Variation, QGD 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 Alekhine Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.O-O O-O 8.Nb3Alekhine Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e3Alekhine Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e3 b5 6.a4 b4Alekhine Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Be7 6.Nf3 Nc6 7.Nxe5Alekhine's Defense; B02 1.e4 Nf6 Alekhjne Variation, Ruy Lopez Exchange 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.d4 exd4 6.Qxd4 Qxd4 7.Nxd4 Bd6Alekseev Variation, Nimzovich; Heinola-Deppe Gambit 1.e4 Nc6 2.d4 d5 3.Nc3 e5Alessi Gambit, Grob 1.g4 f5Alexandre Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 f5Allgaier; Cotter Cambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5Althouse; Stiletto Variation, Sicilian 1.e4 c5 2.Nf3 Qa5Alua Variation 1.e3 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3Amar; Paris Opening 1.Nh3Amazon Attack 1.d4 d5 2.Qd3Amazon, Dunst 1.Nc3 d5 2.e4 dxe4 3.Nxe4 Qd5American Attack, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4 7.Nd6+American Gambit, Dutch 1.d4 f5 2.e4 fxe4 3.Nd2Ampel Variation, Reti 1.Nf3 d5 2.Rg1Amsterdam (Battery) Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.Qd2Amsterdam Attack 1.e3 e5 2.c4 d6 3.Nc3 Nc6 4.b3 Nf6Amsterdam Variation, Sicilian; B93 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4Amsterdam Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Nc3Anderssen (Richter) Attack, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.Bxf6Anderssen Counter-Attack, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nh6 7.d4 d6Anderssen Defense, KGA 1.e4 e5 2.f4 exf4 3.Bc4 g5Anderssen Defense, Kieseritsky Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6Anderssen Defense, Vienna 1.e4 e5 2.Nc3 Bc5Anderssen Gambit 1.e4 e5 2.Bc4 b5 3.Bxb5 c6Anderssen Opening 1.a3Anderssen Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5Anderssen Variation, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Be7Anderssen Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 d6 5.Bxc6+Anderssen Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d3
Anderssen; Counterattack Var, Sic 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6Anderssen-Cordel Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.d4 Nh5 9.Bxf4 Nxf4Andersspike 1.a3 g6 2.g4Andreaschek Gambit, Sicilian 1.e4 c5 2.d4 cxd4 3.Nf3 e5 4.c3Anglo Scandanavian Defense, English 1.c4 d5Anglo System, English; A15 1.c4 Nf6Anglo-Dutch 1.c4 e5 2.Nc3 f5Anglo-Dutch Defense 1.c4 f5Anglo-Lithuanian Variation, English 1.c4 Nc6Anglo-Polish Dutch 1.c4 f5 2.b4Anglo-Slav Opening 1.d4 c6 2.c4 d6Anglo-Slav, English; A11 1.c4 c6Anti-anti-grunfeld 1.c4 Nf6 2.Nc3 g6 3.Nf3 Bg7 4.e4Anti-Benoni Variation, Symmetrical English; A31 1.c4 c5 2.Nf3 Nf6 3.d4Anti-Classical Line, Dutch 1.d4 f5 2.Qd3 e6 3.g4Anti-English, Najdorf Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 Ng4Anti-Grunfeld Variation 1.d4 Nf6 2.c4 g6 3.d5 Anti-Leningrad Variation, Dutch 1.d4 f5 2.Qd3 g6 3.g4Anti-Marshall Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.a4Anti-Meran Gambit, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5Anti-Modern 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Bc4 c6 5.Qe2Anti-Modern, Dutch 1.d4 f5 2.Qd3 d6 3.g4Anti-Moscow Gambit 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 h6 6.Bh4Anti-Nimzo-Indian; E10 1.d4 Nf6 2.c4 e6 3.Nf3Anti-Noteboom Gambit, Semi-Slav 1.d4 d5 2.c4 e6 3.Nf3 c6 4.Nc3 dxc4 5.g3Anti-Noteboom Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.Bg5Anti-Philidor 1.e4 d6 2.d4 Nf6 3.Nc3 Nbd7 4.f4Anti-Pirc Variation, Dunst 1.Nc3 g6 2.h4Anti-Queen's Indian System 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.Nc3Anti-Sozin Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 Qb6Anti-Stonewall, Dutch 1.d4 f5 2.Qd3 d5 3.g4Anti-Tartakower Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bxf6Anti-Torre 1.d4 d5 2.Nf3 Bg4 3.Ne5 Bf5 4.g4Anti-Torre, QP 1.d4 d5 2.Nf3 Bg4Anti-Veresov 1.d4 d5 2.Nc3 Bg4Anti-Winawer Gambit, Slav 1.d4 d5 2.c4 c6 3.Nc3 e5 4.e4Antoshin-Hort Variation, Dutch 1.d4 f5 2.g3 Nf6 3.Bg2 d6Arafat Gambit 1.d4 Nf6 2.e4 Nxe4 3.Bd3 Nf6 4.Bg5Argenitne; Goteborg Var, Sicilian 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 g5Argentine Attack, Benoni; A75 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 Bg4Argentine Variation, QGD 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.Bh4Argentinian Gambit, QGD 1.d4 d5 2.c4 Bf5 3.cxd5 Bxb1 4.Qa4+ c6 5.dxc6 Nxc6 6.Rxb1 Qxd4Arkangelsk; Counterthrust Var, Ruy 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 Armenian Line, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Ba5 6.b4 cxd4Aronin System, Sicilian 1.e4 c5 2.Nf3 a6 3.Be2Aronin-Taimanov Variation, KID; E97 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6Arseniev Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7 11.c4Asymmetrical Variation, English 1.c4 c5 2.Nc3 Nf6 3.Nf3 d5 4.cxd5 Nxd5Atkinson (Kloosterboer) Variation, Center Counter 1.e4 d5 2.exd5 c6 3.dxc6 e5Australian Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.h4Austrian Attack, Pirc; B09 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4Austrian Defense; Summetrical Defense, QGD 1.d4 d5 2.c4 c5Austrian; Yugoslav Defense, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3
Averbakh Gambit, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5 6.d5 b5Averbakh Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5Averbakh Variation, Modern 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4Averbakh Variation, QID 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.Nxd4Averbakh Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6Baarn Variation, Slav; Bled Attack 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Nh4Baeuerle Gambit, French 1.e4 e6 2.d4 b5Baldwin Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.Nc3 Qd4+ 8.Kh1 Qxc4 9.Nd5Balla Variation, Ruy Lopez 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 Qc7Balogh Defense, Dutch 1.d4 f5 2.e4 d6Balogh Defense, Pirc 1.e4 d6 2.d4 f5Balogh Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Bc4Balogh; Tartakower C-G, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 d6Baltic Defense, QGD 1.d4 d5 2.c4 Bf5 3.cxd5 Bxb1 4.Qa4+ c6 5.dxc6 Nxc6Banzai-Leong Gambit, French 1.e4 e6 2.b4Barcza Line, Sicilian 1.e4 c5 2.Nf3 a6 3.c3 Nf6Barcza Opening, Reti; A07 1.Nf3 d5 2.g3Barcza Variation, Dutch 1.d4 f5 2.Nf3 Nf6 3.c3Bardeleben Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 dxc3 5.Nxc3 Bb4 6.Bc4 Nf6Bardeleben Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Qf3 f5Barendregt-Fischer Var, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-OBarmen Defense, Sicilian 1.e4 c5 2.c3 d5 3.exd5 Qxd5Barmina Gambit, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Bc5Barnes Defense 1.e4 f6Barnes; Gedult-Gunderam; Walkerling 1.f3 Barnes; Smyslov; Fianchetto Var, Ruy 1.e4 e5 2.Nf3 Nc6 3.Bb5 g6Barry Attack 1.d4 Nf6 2.Nf3 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Be2Basman Defense; Macho Grob 1.e4 g5Basman Gambit 1.e4 e5 2.Nf3 Nc6 3.Be2 Nf6 4.d4 exd4 5.e5Basman Gambit, KGA 1.e4 e5 2.f4 exf4 3.Qe2Basman Variation, Dutch 1.d4 f5 2.g3 g6 3.Bg2 Bg7 4.Nf3 c6 5.O-O Nh6Basman; Macho Grob; Borg 1.e4 g5 Basman-Palatnik Gambit 1.e4 c5 2.Nf3 d6 3.c3 Nf6 4.Be2 Nc6 5.d4 cxd4 6.cxd4 Nxe4Basque Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.d4 exd4 7.e5 Ne4 8.c3Basque Opening 1.d4 Nf6 2.b3Bastrikov Variation, Sicilian; B47 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7Batavo Polish Attack, Bird 1.f4 Nf6 2.Nf3 g6 3.b4Battambang, Dunst 1.Nc3 e5 2.a3Bavarian Gambit 1.e4 e5 2.c4 d5Bayonet Attack, KID 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.b4Bayonet Attack, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.h4Bayonet Variation, Caro 1.e4 c6 2.d4 d5 3.e5 Bf5 4.g4Bayreuth Variation, ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Bxc6Becker; Anti-Kieseritzky Var, KGA 1.e4 e5 2.f4 exf4 3.Nf3 h6Beefeater 1.c4 g6 2.Nc3 Bg7 3.d4 c5 4.d5 Bxc3 5.bxc3 f5Beefeater Variation 1.d4 g6 2.c4 Bg7 3.Nc3 c5 4.d5 Bxc3+ 5.bxc3 f5Been & Koomen; Dutch & Peruvian 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5Belgrade Gambit, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nd5Beliavsky Gambit, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Nf3 Qf5 7.Qd1 e5Beliavsky Line, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.Bg5 f6Bello Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.Nc3Bellon Gambit 1.d4 e6 2.c4 f5 3.e4Bellon Gambit, Dutch 1.d4 f5 2.c4 e6 3.e4
Bellon Gambit, English 1.c4 e5 2.Nc3 Nf6 3.Nf3 e4 4.Ng5 b5Benelux Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 Nf6 5.d4 Bb6 6.O-O O-OBenima Defense, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Be7Benjamin Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Qb6Benko Attack, KID; E99 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.f3Benko Gambit Accepted 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5Benko Gambit Declined; Hjoerring Countergambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.e4Benko Gambit; Volga; Opocensky; Vaitonis; A57 1.d4 Nf6 2.c4 c5 3.d5 b5Benko Variation, KID 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.g4Benko; Barczay; Bilek; Hungarian 1.g3 Benoni Defense, KID; E74 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c5Benoni Defense, Nimzo-Indian; E31 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5 6.d5 d6Benoni Gambit Accepted 1.d4 c5 2.dxc5Benoni Reversed; Wing Blumenfeld 1.Nf3 d5 2.c4 d4 Benoni-Indian Defense 1.d4 c5 2.d5 Nf6Benoni-Staunton Gambit 1.d4 c5 2.d5 f5 3.e4Berg Variation 1.d4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 c5 5.c4 cxd4 6.Qxd4Berger (Dyckhoff) Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Berger Variation, Center 1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qe3 Nf6 Berger Variation, Petroff 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.Nbd2Berger Variation, Ruy Lopez 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.Nc3Berlin Defense, Bishop; C24 1.e4 e5 2.Bc4 Nf6 Berlin Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6Berlin Defense, Ruy Lopez; C65 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6Berlin Variation, Nimzo-Indian; E38 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5Berlin Variation, Ruy Lopez 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 Nc5Berlin; Rio de Janerio Var, Ruy Lopez 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.Re1Berliner Variation, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nd4 6.c3 b5 7.Bf1 Nxd5 8.Ne4 Qh4Bernstein Defense; Gligoric System; E53 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5Bernstein Variation, 4 Knights 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 Ne7Bernstein Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bh4Bernstein Variation, Nimzo-Indian; E56 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O Nc6Bernstein Variation, QGD 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.bxc3Bernstein Variation, Ruy Lopez 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.Nbd2Bertin; Three Pawns Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Bh4+ 5.g3Betbeder; Veresov; Levitzky; Parisian 1.d4 d5 2.c4 dxc4 3.e4 f5Beverwijk Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Bc5Beyer Gambit 1.e4 e5 2.d4 d5Big Clamp Variation, Sicilian 1.e4 c5 2.d3 Nc6 3.c3 d6 4.f4Bileefelder Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 Bc5Bilguer Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4Bilguer-Mirage Variation, KGA 1.e4 e5 2.f4 exf4 3.Qe2Billinger Gambit, QGA 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.a3Bird Attack, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.b4Bird Defense, Ruy Lopez; C61 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4Bird Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Ne5 Qh4+ 6.g3Bird Gambit, Philidor 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.c3Bird Invitation, French 1.e4 e6 2.Bb5Bird Variation, Siclian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 Be6Bird's Opening; Dutch Attack 1.f4Birmingham Gambit, Polish 1.b4 c5Bishop Attack 1.e4 g6 2.d4 Bg7 3.Bc4Bishop Attack, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Bg5
Bishop Attack, Nimzo-Indian; E47 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3Bishop Attack, Tarrasch 1.d4 d5 2.c4 e6 3.Nf3 c5 4.cxd5 exd5 5.Bg5Bishop Attack; Levitsky Attack, Queen Pawn Game 1.d4 d5 2.Bg5Bishop Defense, QP; Anti-Colle 1.d4 d5 2.Nf3 Nf6 3.e3 Bf5Bishop Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Bc5Bishop's Gambit, KGA 1.e4 e5 2.f4 exf4 3.Bc4Bishop's Opening; C23 1.e4 e5 2.Bc4Blachy Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Nc6Blackbunre Attack, KGD 1.e4 e5 2.f4 d5 3.Nf3Blackbunre-Kloosterboer Gambit, Center Counter 1.e4 d5 2.exd5 c6 3.dxc6 e5Blackburne Attack, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.Nd5 Bc5 7.d4Blackburne Attack, Dutch 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Bg7 5.Nh3Blackburne Attack, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Qd2Blackburne Defense, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7Blackburne Gambit, Center Counter 1.e4 d5 2.exd5 c6 3.dxc6 Nxc6Blackburne Variation, Dutch 1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nh3Blackburne's Move, QGA; Normal Variation, QGA; D21 1.d4 d5 2.c4 dxc4 3.Nf3Blackmar Gambit; Gedult Gambit 1.d4 d5 2.e4 dxe4 3.f3 Blackmar-Diemer Gambit 1.d4 d5 2.e4Blackmar-Diemer Gambit 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3Blackmar-Diemer Gambit Deferred 1.d4 Nf6 2.f3 d5 3.e4 Blackmar's Second Gambit, Dutch 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.f3Bladel Variation, Dutch 1.d4 f5 2.c4 g6 3.Nc3 Nh6Blanel Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.Nc3 Nxe4Bled Variation, English 1.c4 c6 2.Nf3 d5 3.b3 Nf6 4.g3 g6Bledow Countergambit, KGA 1.e4 e5 2.f4 exf4 3.Bc4 d5 4.Bxd5 Nf6Bledow; Morphy Defense, KGA 1.e4 e5 2.f4 exf4 3.Bc4 d5Blockade Variation; Semi-Benoni; Russian Variation 1.d4 c5 2.d5 e5 3.e4 d6Bloodgood Gambit, Reti 1.Nf3 d5 2.b3 c5 3.e4 dxe4 4.Ne5Blumenfeld Countergambit 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5Blumenfeld Countergambit Accepted 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.dxe6 fxe6 6.cxb5 d5Blumenfeld Variation 1.d4 Nf6 2.c4 e6 3.Nf3 c5Blumenfeld Variation, QGD; D49 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.Nxb5Blumenfeld Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.Nb5Bobotsov-Korchnoi-Petrosian Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Nge2Boden Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Nc6Boden Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Qxd4 Bd7Boden Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 Qe7Boden-Kieseritzky Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Bc4 Nxe4 4.Nc3Boden-Kieseritzky Gambit, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Nf3Boehnke Gambit Accepted, Center Counter 1.e4 d5 2.exd5 e5 3.dxe6 Bxe6Boehnke Gambit, Center Counter 1.e4 d5 2.exd5 e5Bogoljubov Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5 7.Nd2 Bb4 8.Qc2Bogoljubov; Jaenisch Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Nf6 4.Nc3 c6Bogoljubov; Mikenas-Van Geet Defense 1.d4 Nc6Bogoljubow (Scotch) Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4Bogoljubow Defense, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3 a6 5.e4Bogoljubow Defense; Bogo-Indian Defense; E11 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+Bogoljubow Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6Bogoljubow Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Bd2Bogoljubow Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Nf6 4.Nc3Bogoljubow Variation, Nizovich Defense 1.e4 Nc6 2.d4 d5 3.Nc3Bogoljubow Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 Be7
Bogoljubow Variation, Tarrasch 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 c4Bogoljubow Variation, Two Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Qf3Bogoljubow; Counterthrust Var, Ruy 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d4 Bg4Boleslavsky Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.Nf3 Nc6 7.Be3Boleslavsky Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5Bonet Gambit, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Bg5Bonsch-Osmolovsky Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 Ne7Bonsdorf Variation, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 4.a3 b6Borg Defense; Troon Gambit 1.e4 g5 2.d4 h6 3.h4 g4Borg Gambit 1.d4 g5Borg Gambit 1.e4 g5 2.d4 Bg7Borg Variation, Trompowsky 1.d4 Nf6 2.Bg5 Ne4 3.Bf4 g5Borisenko Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7Borisenko Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Nc6Borisenko-Furman Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e4Botvinnik Defense, Sicilian Closed 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e5Botvinnik Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e4Botvinnik System Reversed, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 e5Botvinnik System, King's English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.e4Botvinnik System, Nimzo-Indian; E49 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.a3 Bxc3+ 7.bxc3Botvinnik Variation, Catalan 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Nc3 c6 8.Qd3Botvinnik Variation, Dutch; A93 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.b3Botvinnik Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4Botvinnik Variation, French 1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.e4 Nfd7 5.Bd3 c5 6.c3 b6Botvinnik Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3 e6Botvinnik Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Rc1 c5 7.dxc5 Be6Botvinnik Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.e3 O-O 8.cxd5 Nxd5Botvinnik Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Nc6Botvinnik Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 6.e4 b5Botvinnik Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Bd3Botvinnik Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 h6 6.Bh4 g5 7.Bg3 Nh5Botvinnik Variation, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4Botvinnik-Bronstein Variation, Dutch 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nc3 O-O 6.e3Botvinnik-Carls Defense, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 c5Bouncing Bishop Variation 1.e3 e5 2.Bc4 b5 3.Bb3Bourdonnais (La Bourdonnais) Variation, French 1.e4 e6 2.f4 Bourdonnais; Lowenthal Var, Sic 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5Bowlder Attack, Sicilian 1.e4 c5 2.Bc4Boyce Defense, Veresov 1.d4 d5 2.Nc3 Nf6 3.Bg5 Ne4Bradford Attack, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.dxc5 Bxc5 7.Qg4Bradley Beach Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d4 e4Brandics Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.Nc3 a6Braune Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Be3Bremen; Carls Variation, English 1.c4 e5 2.Nc3 Nf6 3.g3Bremen-Hort Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 d6 6.Nge2 Be6Brentano Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O d5Brentano Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 g5Breslau Variation, Ruy Lopez 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.Nd4Breyer Defense, Nimzovich 1.e4 Nc6 2.Nc3 Nf6Breyer Opening, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.d3 Be7 5.b4Breyer Variation, Caro-Kann 1.e4 c6 2.d3Breyer Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 c5Breyer Variation, QP 1.d4 d5 2.Nf3 Nf6 3.Bg5 e6 4.e3 c5 5.c3 Qb6
Breyer Variation, Sicilian; B39 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 Nf6 7.Nc3 Ng4Breyer Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nbd2Breyer Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Nf3 Be7Breyer; Hungarian; Carrera, KGA 1.e4 e5 2.f4 exf4 3.Qf3Breyer; Retreat Variation, Ruy Lopez; C94 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8Brick Variation, Sicilian 1.e4 c5 2.Nh3Brieger Defense; Sahovic Defense, QGD; Baltic Defense 1.d4 d5 2.c4 Bf5Brinckmann Attack, Grunfeld; D82 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Brinckmann Variation, Polish 1.b4 e5 2.Bb2 f6 3.e4 Bxb4 4.Bc4 Nc6 5.f4 Qe7 6.f5 g6Brix Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O g6Brodsky-Jones Variation, French 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 f6Brombacher; Daberitz Var, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c5Bronstein (Haag) Gambit, Sicilian 1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Qxd7 5.O-O Nc6 6.c3 Nf6 7.d4Bronstein Attack, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Be2Bronstein Defense, KID 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 Nxf1Bronstein Gambit 1.d4 Nf6 2.g4Bronstein Gambit, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Qh5+ g6 7.Qe2Bronstein Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.Bc4 Nf6 4.f4 Nxe4 5.Nf3Bronstein Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 c6 7.O-O Qa5Bronstein Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Ne2Bronstein Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 Nf6 5.Nf3 a6Bronstein Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 e5 6.d5 Nh5 7.Be3 Na6 8.Qd2 Qh4+ 9.g3 Nxg3 10.Qf2 Nxf1 11.Qxh4 Nxe3 12.Kf2 Nxc4Bronstein Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 Bd7Bronstein Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 Nbd7 9.Ne2Bronstein Variation, Nimzo-Indian; E45; Byrne Variation 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Ba6Bronstein Variation, Nimzo-Indian; E55 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 Nbd7Bronstein Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Qd6Bronstein Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 Nf6 6.Nc3 Bb4 7.Bd3 Nc6Browne Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.c4 Nb4 9.cxd5Browne Variation, Najdorf Sicilian 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 Qc7Brussels Gambit, Sicilian 1.e4 c5 2.Nf3 f5Bryan; Kieseritzky Gambit, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 b5Bucker Defense, Grob 1.g4 Nh6Bucker Defense, Polish 1.b4 Na6Buckley Attack, Alekhine 1.e4 Nf6 2.e5 Nd5 3.Na3Budapest Defense; A51 1.d4 Nf6 2.c4 e5Buecker Gambit 1.e4 g6 2.d4 Bg7 3.Bc4 b5Buecker Variation, Sicilian 1.e4 c5 2.Nf3 h6Buerger Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 6.d5 exd5 7.Ng5Bugayev Attack, Polish 1.b4 e5 2.a3Bulgarian Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a5Bullfrog; Weidenhagen; Krabbe; Ochsenfrosch 1.d4 Nf6 2.g4Buntin Gambit, Alekhine 1.e4 Nf6 2.e5 Nd5 3.e6Burgar Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 d6Burgess Line, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Na6 7.Qd2 c6Burille Variation, Grunfeld; D94 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3Burn Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4Byrne Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 c6 7.Bd3 a6Byrne Variation, Sicilian; English Attack 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3Calabrese Counter-Gambit 1.e4 e5 2.Bc4 f5Cambridge Gambit, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 g5Cambridge Springs; Pillsbury Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5Campbell; Brentano; Morphy Var, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 d5
Campomanes Attack, Caro 1.e4 c6 2.d4 d5 3.Nc3 Nf6Canal Attack, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.exd5 exd5 5.Bd3 Ne7 6.Qh5Canal Variation, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6 5.Nc3 d6 6.Bg5Canal; Venice Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.cxd5 Qb6Canard Attack 1.d4 Nf6 2.f4Canard Formation; Double Duck 1.f4 f5 2.d4 d5Cannstatter Variation, Mikenas 1.d4 Nc6 2.c4 e5 3.d5 Nd4Capablanca Freeing Maneuver, QGD; D67 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 Nd5Capablanca Line, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Ne5Capablanca Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Rc1Capablanca Variation, Indian Game; A47 1.d4 Nf6 2.Nf3 b6Capablanca Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3 Nc6 7.Bd3 O-O 8.Ne2 b6 9.e4 Ne8Capablanca Variation, Nimzo-Indian 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 Ne8Capablanca Variation, QGD 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nbd2Capablanca Variation, QGD 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.Bb5Capablanca Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+Carlsbad Line, Caro-Kann 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 e6Carlsbad Variation, Dutch 1.d4 f5 2.g3 g6 3.Bg2 Bg7 4.Nh3Carlsbad Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6Carlsbad Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxd2Carlsbad Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Nbd7 7.Nxc4 Qc7 8.g3 e5Carlsbad Variation, Tarrasch 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.Bg5Carlson Gambit, French 1.e4 e6 2.d4 d5 3.Nf3 dxe4 4.Ne5Caro Variation, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 Bd7Caro Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5Caro-Kann Defense; B10 1.e4 c6 Carr Defense 1.e4 h6Carrera Gambit, KGA 1.e4 e5 2.f4 exf4 3.Qh5Catalan Opening 1.d4 Nf6 2.c4 e6 3.g3Center Attack, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4Center Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.e5 Ne4 5.Qxd4Center Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4 exd4Center Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.d4Center Counter; Scandanavian; B01 1.e4 d5Center Formation, Smith-Morra Declined, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 e5Center Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 d6 4.d4 exd4 5.O-OCenter Game Accepted 1.e4 e5 2.d4 exd4Center Game; C21 1.e4 e5 2.d4 Center Holding Variation, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7 5.d4 Bb6 Center Play Variation, Budapest; Alekhine Variation 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4Center Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.e4Central Countergambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d5Central Storming Variation, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.f4Central; Polerio; Willemson, Steinitz 1.e4 e5 2.f4 exf4 3.d4Chabanon Gambit, English 1.c4 f5 2.Nf3 d6 3.e4Chameleon Sicilian 1.e4 c5 2.Nc3 Nc6 3.Nge2Chameleon Variation, Sicilian 1.e4 c5 2.d3Chameleon Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 a6Chandler Gambit, QP 1.d4 d5 2.Nf3 c5 3.g3 cxd4 4.Bg2Charlick Gambit; Englund Gambit 1.d4 e5Charousek Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 Bb6Chatard-Alekhine; Albin Attack, Fr 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4Chekhover Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4
Chelyabinsk Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5Chepukaitis Gambit 1.d4 Nf6 2.Bg5 c5 3.d5 Qb6 4.Nc3 Qxb2 5.Bd2 Qb6Chicago Defense, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 d6 5.Bc4 e6 6.Nf3 Nf6 7.O-O a6Chicago; Irish; Schulze-Muller Gambit 1.e4 e5 2.Nf3 Nc6 3.Nxe5 Nxe5 4.d4Chigorin Defense, Danish Gambit 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Qe7Chigorin Defense, QGD; D07 1.d4 d5 2.c4 Nc6Chigorin Gambit, Damiano 1.e4 e5 2.Nf3 f6 3.Nxe5 Qe7 4.Nf3 d5Chigorin Line, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O Nc6Chigorin Variation, Dutch 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 c6Chigorin Variation, French 1.e4 e6 2.Qe2Chigorin Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.exf6Chigorin Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.Re1Chigorin Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 Bd6Chigorin Variation, QP 1.d4 d5 2.Nf3 Nc6Chigorin Variation, Ruy Lopez; C97 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 Chigorin; Ponziani; Veresov 1.d4 d5 2.Nc3Chinese Variation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.g4Chiodini Gambit 1.e4 e5 2.Nf3 Bc5 3.Nxe5 Nc6Chistiakov Defense, French 1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 Qxd5Christensen Gambit, QGA 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Nf3Clam Gambit, Latvian 1.e4 e5 2.Nf3 f5 3.d3 Nc6 4.exf5Clam Variation; Leonardis Variation 1.e4 e5 2.d3Clarendon Court Variation, Benoni 1.d4 c5 2.d5 f5Classical Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4Classical Defense Deferred, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Bc5Classical Defense, Colle System; D05 1.d4 d5 2.Nf3 Nf6 3.e3 e6Classical Defense, Danish Gambit 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Nf6Classical Defense, KGA; Lopez Variation 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5Classical Defense, KGD 1.e4 e5 2.f4 Bc5 Classical Defense, Nimzo-Indian; E48 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5Classical Defense, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5Classical Defense, Veresov 1.d4 d5 2.Nc3 Nf6 3.Bg5 e6 4.Nf3Classical Formation, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 a6 7.O-O Nf6Classical Line, Catalan; E05 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Be7Classical Main Line, Grunfeld; D86 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4Classical System, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2Classical Tarrasch Gambit 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 d4Classical Variation, Benoni; A70 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3Classical Variation, Bishop; Boi Variation 1.e4 e5 2.Bc4 Bc5 Classical Variation, Caro; B18 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5Classical Variation, Dutch 1.d4 f5 2.c4 e6Classical Variation, Dutch 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2Classical Variation, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bc5Classical Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7Classical Variation, French; C11 1.e4 e6 2.d4 d5 3.Nc3 Nf6Classical Variation, Italian; C53 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3Classical Variation, Larsen 1.b3 d5Classical Variation, Neo-Grunfeld; D77 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-OClassical Variation, Nimzo-Indian; E32 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2Classical Variation, QGD 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.Rxc3Classical Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-OClassical Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2Classical Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5
Classical Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6Classical; Cordel Var, Ruy Lopez; C64 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5Clemenz Opening 1.h3Closed Bernstein Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Bg5Closed Defense, Ruy Lopez; C84 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7Closed Scandavian 1.e4 d5 2.Nc3Closed Showalter Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Bxc6Closed System, Full Symmetry, King's English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6Closed System, King's English; A26 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3Closed Variation, Catalan 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2Closed Variation, KID; E87 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5Closed Wolf Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 exd4Closed; Chigorin Variation, Sicilian; B23 1.e4 c5 2.Nc3Cobra Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Ndb5 Bc5Cochrane Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nxf7Cochrane Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 f3Cocquio Counter Gambit, QGD; Tan Gambit 1.d4 d5 2.c4 Nf6 3.cxd5 c6Colle System; D04 1.d4 d5 2.Nf3 Nf6 3.e3Collijn Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5 5.Nf3 Bg4Colman Variation, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Qf3 Rb8Cologne Gambit, Ware Opening 1.a4 b6 2.d4 d5 2.Nc3 Nd7Colorado Counter Accepted, Nimzovich Defense 1.e4 Nc6 2.Nf3 f5 3.exf5Colorado Defense, Nimzovich; Lean Variation 1.e4 Nc6 2.Nf3 f5Compromised Defense, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O dxc3Copenhagen Defense, Danish Gambit 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Bb4+Cordel Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 Nd6 7.Bxc6+ bxc6 8.dxe5 Nf5Cordel Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 f5Cordel Line, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Be7 6.d4 Na5Corkscrew Counter-Gambit, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Nf6 4.Bc4 fxe4 5.Nf7 Qe7 8.Nxh8 d5Cormorant Gambit, Benoni 1.d4 c5 2.dxc5 b6Corn Stalks 1.e4 a5Cortlever Gambit, Sicilian 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Bc4Cortlever Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 Nf6 4.dxc5 Nxe4 5.cxd6Costa's Line 1.d4 d5 2.c4 Nc6 3.cxd5 Qxd5 4.e3 e5 5.Nc3 Bb4 6.Bd2 Bxc3 7.Bxc3 exd4 8.Ne2Cotter Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 h6 6.Nxf7Counter Fianchetto Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 Nc6 8.dxc5Counterthrust Variation 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7Counterthrust Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5Cozio (Lasker) Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Qe2Cozio Attack, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Qf3Cozio Defense Deferred, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nge7Cozio Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7Cozio Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 d6Cozio; Hanneken; Prussian; Lichtenhein 1.e4 e5 2.f4 exf4 3.Bc4 Nf6Cracow Variation, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Kf1Creepy Crawly Formation 1.a3 e5 2.h3 d5Crocodile Variation, Center Game 1.e4 e5 2.d4 exd4 3.f4 Bc5 4.Nf3 Nc6 5.c3Cunningham Defense, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 Be7Cunningham Gambit, KGA; C35 1.e4 e5 2.f4 exf4 3.Nf3 Be7Czech Defense 1.e4 d6 2.d4 Nf6 3.Nc3 c6Czech Defense, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O c6Czech Defense; Open Slav Defense; D17 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5Czech Variation, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 Be7
Czech Variation, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nb6Czech-Indian 1.d4 Nf6 2.Nf3 c6Czerniak Defesne, Benoni; A76 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 Re8Czerniak Line, Caro-Kann 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qa5Czerniak Variation, Sicilian Dragon 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 Nxd4 10.Bxe4Damiano Defense 1.e4 e5 2.Nf3 f6Damiano Gambit 1.e4 e5 2.Nf3 f6 3.Nxe5 fxe5 4.Qh5+ g6 5.Qxe5+ Qe7 6.Qxh8Damiano Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nxe4Danish Gambit 1.e4 e5 2.d4 exd4 3.c3Danish Gambit Accepted 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2Danube Gambit; Adorjan Gambit 1.d4 Nf6 2.c4 g6 3.d5 b5Danube; Donau Gambit 1.d4 Nf6 2.c4 g6 3.d5 b5 4.cxb5 a6 5.bxa6 c6De Bruycker Defense, Caro 1.e4 c6 2.d4 Na6De Riviere Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.c3Debrecen Defense, KID; E67 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nbd7 Deferred Fianchetto, KID; E72 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.g3Delayed Alapin, Sicilian 1.e4 c5 2.Nf3 d6 3.c3Delayed Exchange Ruy Lopez Deferred; C85 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Bxc6Delayed Exchange Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.exd5Delayed Exchange Variation, Neo-Grunfeld; D74 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.cxd5 Nxd5 7.O-ODelayed Fianchetto, KID; E62 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3Delayed Keres Attack, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.g4Delmar Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.c3Despres Opening 1.h4Deutz Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.O-O Nf6 5.d4Development Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O Nc6Devin Gambit, Catalan 1.d4 Nf6 2.c4 e6 3.g4Diemer Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bf4Diemer Counterattack 1.d4 e5 2.d5 Bc5 3.e4 Qh4Diemer Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.fxe4Diemer Gambit, Slav 1.d4 d5 2.c4 c6 3.e4Diemer-Duhm Gambit, Caro 1.e4 c6 2.d4 d5 3.c4Diemer-Duhm Gambit, French 1.e4 e6 2.d4 d5 3.c4Diemer-Rosenberg Attack, BDG 1.d4 d5 2.e4 dxe4 3.Be3Diepstraten Countergambit, Latvian 1.e4 e5 2.Nf3 f5 3.c4Dilworth; Kleczynski Var, Ruy Lopez 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.Bc2Dlugy Variation, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.f3Dodo Gambit, KGA 1.e4 e5 2.f4 exf4 3.Qg4Donner Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O c6Dorfman Gambit, Sicilian 1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.O-O Bd7 5.Qe2 g6 6.e5Dory (Doery) Defense 1.d4 Nf6 2.c4 e6 3.Nf3 Ne4Dory Defense 1.d4 Nf6 2.Nf3 Ne4Double Fianchetto Defense, English 1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O g6Double Fianchetto, KID; E82 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 b6Double Fianchetto, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.b3Double Gambit Accepted, Two Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Nxe4Double Grob 1.g4 g5Double Muzio Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.e5 Qxe5 8.Bxf7+Double Pawn Sacrifice, Goering Gambit 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 dxc3 5.Bc4Double Ruy Lopez Opening, 4 Knights; C49 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4Double Whammy, English 1.c4 e5 2.f4Double-Dutch Gambit, Sicilian 1.e4 c5 2.Nf3 f5 3.exf5 Nh6Dragon Formation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 c5
Dragon Variation, Richter-Rauzer Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 g6Dragon Variation, Sicilian; B70 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6Dresden Opening 1.e4 e5 2.Nf3 Nc6 3.c4Dreyev Defense, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nc3 Qb6Dries Counter-Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 c5Drill Variation, English 1.c4 e5 2.g3 h5Drunken King, KGA 1.e4 e5 2.f4 exf4 3.Kf2Drunken Knight Opening 1.Nh3Dubois Variation, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 d3 4.c4Duchamp Variation, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d3Duke of Courland Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Bc4 fxe4 4.Nxe5 Qg5 5.d4 Qxg2 6.Qh5 g6 7.Bf7 Kd8 9.Bg6 Qh1Dunst Gambit 1.Nc3 d5 2.e4 dxe4 3.d3Dunst; Heinrichsen; Will Bull; Kotrc 1.Nc3Dunworth Variation, Modern Defense 1.e4 g6 2.d4 Bg7 3.c4 d5 4.exd5 c6 5.dxc6 Bxd4Duras Variation, French 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.Bc1Duras Variation, QGD; Capablanca Variation 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 h6Duras Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 d6 5.c4Duras Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d3 d6 6.c4Durkin's Opening; Sodium Attack 1.Na3Dus-Chotimursky Variation 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.Bg5Dutch Defense; A80 1.d4 f5Dutch Indian; Leningrad Variation, Dutch; A81 1.d4 f5 2.g3Dutch System, QP 1.d4 d5 2.Nc3 f5Dutch Variation, Larsen 1.b3 f5Dutch Variation, Slav; D18 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3Duthilleuk Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6 6.Bd3 Nc6 7.Bg5 Be7 8.Ne4Duz-Khotimirsky Variation 1.d4 Nf6 2.c4 d6 3.Nc3 Nbd7 4.e3 e5 5.Bd3Dynamic Attack, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Nf3 c5 7.d5Dzindzi-Indian Defense 1.d4 Nf6 2.c4 e6 3.Nf3 a6East Indian Defense; E00 1.d4 Nf6 2.c4 e6Eastbourne Gambit 1.d4 b6 2.c4 Bb7 3.Bxb5Edge Variation, Sicilian Closed 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e5 7.Nh3 Nge7Edge Variation, Trompowsky 1.d4 Nf6 2.Bg5 Ne4 3.Bh4Edinburgh Variation, Caro 1.e4 c6 2.d4 d5 3.Nd2 Qb6Eifel Gambit, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Bc5 4.Nge2 b5Eisenberg Variation, KGA 1.e4 e5 2.f4 exf4 3.Nh3Ekolu Variation 1.e3 e5 2.Nc3 d5 3.f4 exf4 4.Nf3Ekstrom Variation, Ruy Lopez 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.c4Ekstrom Variation, Semi-Slav 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.Ne5El Columpio Defense, Nimzovich Defense 1.e4 Nc6 2.Nf3 Nf6 3.e5 Ng4Elbert Counter-Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e5Ellis Gambit, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 e5Endgame Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.dxe5Endgame Variation, Tarrasch 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 Be6English Attack, Scheveningen Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.f3English Defense 1.c4 e6 2.d4 b6English Defense 1.d4 e6 2.c4 b6English Hybrid, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.g3 O-O 6.Bg2 cxd4 7.Nxd4 d5 8.cxd5 Nxd5English Opening; A10 1.c4English Orangutan 1.c4 Nf6 2.b4English Queen 1.c4 e5 2.Qa4English Rat 1.d4 d6 2.c4 e5English Spike 1.c4 f5 2.g4
English Variation, Larsen 1.b3 c5English Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2 b5 7.Bb3 O-O 8.c3 d6 9.d4 Bg4Englund Gambit 1.d4 e5 2.dxe5 Nc6 3.Nf3 Qe7Englund Gambit Declined 1.d4 e5 2.d5Englund; Behting Gambit 1.d4 e5 2.dxe5 Nc6 Erben Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.Nc3 g6Erben Gambit, Vienna 1.e4 e5 2.Nc3 Nf6 3.g3 d5 4.exd5 c6Erbenheimer Gambit, English 1.c4 e5 2.Nc3 Nf6 3.Nf3 e4 4.Ng5 Ng4Euwe Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6 Euwe Variation, French 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Bd7Euwe Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5 Ne4Euwe Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.b3Euwe Variation, Queen Pawn Game 1.d4 d5 2.Bg5 h6 3.Bh4 c6 4.Nf3 Qb6Euwe Variation, Torre Attack 1.d4 Nf6 2.Nf3 g6 3.Bg5 Bg7 4.Nbd2 c5Evans Gambit Accepted 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4Evans Gambit; C51 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4Everglades Defense, Alekhine 1.e4 Nf6 2.e5 Ng8 3.d4 f5Exchange Variation, Caro; B13 1.e4 c6 2.d4 d5 3.exd5Exchange Variation, Chigorin Defense 1.d4 d5 2.c4 Nc6 3.cxd5 Qxd5Exchange Variation, Four Pawns Attack, KID; E79 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.Be3Exchange Variation, French 1.e4 e6 2.d4 d5 3.exd5 exd5Exchange Variation, Grunfeld; 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3Exchange Variation, Grunfeld; D85 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5Exchange Variation, Neo-Grunfeld 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.cxd5 Nxd5Exchange Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 exd4Exchange Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5Exchange Variation, Richter-Rauzer Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nxc6Exchange Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6Exchange Variation, Schliemann Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Bxc6Exchange Variation, Slav 1.d4 d5 2.c4 c6 3.cxd5Exchange Variation, Slav; D13 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5Exchange Variation, Tartakower Defense, QGD; D59 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 b6 8.cxd5 Nxd5Extended Bishop Swap, French 1.e4 e6 2.d4 d5 3.e5 Bd7Fajarowicz Variation, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ne4Falkbeer Countergambit Accepted, KGD 1.e4 e5 2.f4 d5 3.exd5Falkbeer Counter-Gambit, KGD; C31 1.e4 e5 2.f4 d5 Falkbeer Variation, Vienna; C26 1.e4 e5 2.Nc3 Nf6Fantasy; Lilienfisch Variation, Caro 1.e4 c6 2.d4 d5 3.f3Farago Defense, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Ba6 5.Qc2 Bb7Fazekas Gambit, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Na6 7.e4Felbecker Gambit 1.d4 e5 2.dxe5 Nc6 3.Nf3 Bc5Fianchetto Defense, QP 1.d4 d5 2.Nc3 g6 3.Nf3 Bg7Fianchetto Defense, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 g6Fianchetto Defense, Torre Attack 1.d4 Nf6 2.Nf3 g6 3.Bg5Fianchetto Gambit, Modern Defense 1.e4 g6 2.d4 f5Fianchetto Line, Four Knights English; A29 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3Fianchetto Lines, Two Knights Variation, English; A24 1.c4 e5 2.Nc3 Nf6 3.g3 g6Fianchetto System, QID; E15 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3Fianchetto Traditional, QID; E16 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7Fianchetto Variation, Albin Countergambit; D09 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3Fianchetto Variation, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 g6 7.Nf3 d6 8.g3 Bg7 9.Bg2Fianchetto Variation, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2Fianchetto Variation, Dutch; A86 1.d4 f5 2.c4 Nf6 3.g3
Fianchetto Variation, KID 1.d4 Nf6 2.c4 g6 3.g3Fianchetto Variation, Orthodox Defense, QGD 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 b5Fianchetto Variation, Richter-Rauzer Sicilizn 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.g3Fianchetto Variation, Scheveningen Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g3Fianchetto Variation, Sicilian Closed; B24 1.e4 c5 2.Nc3 Nc6 3.g3Fianchetto Variation, Sicilian Dragon 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.g3Fianchetto Variation, Symmetrical English 1.c4 c5 2.Nc3 Nf6 3.g3Fianchetto Variation, Symmetrical English; A36 1.c4 c5 2.Nc3 Nc6 3.g3Fine Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Qc8 6.O-O c5 7.d5Fingerslip Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2Finnish Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 h6Fischer Attack, Sozin Attack, Sicilian; B86 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4Fischer Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 d6Fischer Variation, Nimzo-Indian; E44 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2Fischer Variation, Ruy Lopez 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.g3Fishing Pole Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Ng4Flank Variation, Sicilian; B87 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 a6 7.Bb3 b5Fleissig; Meitner Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Nc2Flexible Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 h6Flexible Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d3Floh-Mikenas-Carls Variation, English; A19 1.c4 Nf6 2.Nc3 e6 3.e4 c5Flohr Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.Be2 c6Flohr Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.Nh3Flohr Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6 7.O-O Bf5Flohr Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qa4+Flohr Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qc7Flohr; Winawer Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Be6Flohr; Zaitsev; Lenzerheide Var, Ruy 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Bb7Flohr-Mikenas-Carls Variation, English; A18 1.c4 Nf6 2.Nc3 e6 3.e4Florentine Gambit, KID 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.e5Fluid Attack, KID; E78 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Be2 c5 7.Nf3Fluid Formation, Dutch 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6Folkestone; Swedish Var, QGD 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 c4Foltys Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4 fxe4 5.d3Foltys-Leonhardt Variation, Latvian Gambit 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4Forgacs Variation, Caro Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.Bc4Fort Knox Variation, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Bd7 5.Nf3 Bc6Four Knights Openng; C47 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6Four Knights Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d4 exd4 5.Nxd4Bb4 6.Bg5 h6 7.Bh4 Bxc3+ 8.bxc3 Ne5Four Knights Variation, English; A28 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6Four Knights Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 Nc6 8.Nc3Four Knights Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3Four Knights Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6Four Knights Variation, Symmetrical English 1.c4 c5 2.Nc3 Nf6 3.Nf3 Nf6Four Pawns Attack, Benoni 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 Four Pawns Attack, KID; E76 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4Four Pawns Attack; Chase V 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4Franco-Benoni; Franco-Sicilian 1.d4 c5 2.d5 e6 3.e4Franco-Hiva Gambit I, French 1.e4 e6 2.d4 f5Franco-Hiva Gambit, French 1.e4 e6 2.d3 f5Franco-Indian Defense 1.d4 e6Franco-Nimzovich Variation 1.e4 Nc6 2.Nf3 e6Franco-Sicilian Defense 1.d4 e6 2.c4 c5
Franco-Sicilian Hybrid 1.d4 e6 2.c4 c5 3.d5 exd5 4.cxd5 d6 5.Nc3 g6 6.e4 Bg7 7.Nf3 Ne7Frankenstein-Dracula Var, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Nc6 6.Nb5 g6 7.Qf3 f5 8.Qd5 Qe7Frankfort; Gunderam Var, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Qf6Frankfurt Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ng8 6.Be3 b6Fraser Attack, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nf3Fraser Attack; Mortimer, Evans 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.Qa4Fraser Defense, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Nc6Fraser Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.g3 fxg3 7.Qf3Fraser-Minckwitz Variation, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 b6Freak Attack, Siicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Rg1Fred; From Reversed 1.e4 f5Frederico Variation, Sicilian 1.e4 c5 2.Nf3 g6 3.d4 f5French Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d3French Connection, Nimzovich Defense 1.e4 Nc6 2.d4 e6French Defense; C00 1.e4 e6French Variation, Sicilian; B40 1.e4 c5 2.Nf3 e6Frenkel Gambit, French 1.e4 e6 2.d4 d5 3.e5 c5 4.b4Frere; Becker; Katilimov, Maric Var, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Qd5Fricke Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 d5 4.Nxe5 Qg5 5.O-OFried Fox, Alekhine; Krejcik Gambit 1.e4 Nf6 2.Bc4 Nxe4 3.Bxf7+Fried Liver; Fegatello Attack, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.Nxf7Friess Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Nxe5Fritz Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Bc4Fritz Variation, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nd4From Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qe7From's Gambit, Bird 1.f4 e5Full Symmetry Line, Symmetrical English; A38 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6Fully Accepted Variation, Benko Gambit; A58 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6Furman Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.dxc5 Bxc5Furman-Taimanov; Wing Var, Ruy; Norwegian Variation 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Na5Fyfe Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.d4Gaga Gambit, KGA 1.e4 e5 2.f4 exf4 3.g3Gama Gambit, KGA 1.e4 e5 2.f4 exf4 3.g3 fxg3 4.Nf3Gambit 59 1.g3 d5 2.Bg2 e5 3.b4Gambit Line, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.c3 d5 4.exd5 Nf6Gary Gambit, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 d5Gaw-Paw Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Qb6Gedult Attack 1.d4 Nf6 2.f3 d5 3.g4Gedult-Gunderam System 1.d4 Nf6 2.f3 d5 3.g4Geller Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Nbd7Geller Line, Sicilian 1.e4 c5 2.Nf3 a6 3.c4 Nc6 4.d4 cxd4 5.Nxd4 e5Geller Variation, Ruy Lopez 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 Qh3Geller Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3 Bb6 6.a4 a6 7.Nc3 Nf6Geller Variation, Symmetrical English 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.g3 Qb6Geller Variation; Geller-Tolush Var, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e4Geller's System, Modern Defense 1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.c3General Variation, King's English 1.c4 e5 2.Nc3 d6 3.Nf3General Variation, Staunton Gambit, Dutch; A83 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5Geschev Gambit, Alekhine 1.e4 Nf6 2.Nc3 d5 3.exd5 c6Ghulam Kassim; Koch Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4Ghulam-Kassim Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4 gxf3 6.Qxf3Gianutio Countergambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 f5Gianutio Counter-Gambit, KGA 1.e4 e5 2.f4 exf4 3.Bc4 f5
Gibbins-Wiedehagen Gambit Accepted 1.d4 Nf6 2.g4 Nxg4Gibbon Gambit; Grunfeld Spike 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.g4Giertz-Peters Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.f3Ginsberg Gambit, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Bc4Gipslis Variation, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 Bg4Giraffe Attack, Vienna 1.e4 e5 2.Nc3 Bc5 3.Qg4Giuoco Pianissimo 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Giuoco Pianissimo 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d3Giuoco Piano; Italian Opening 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5Glasscoe Gambit, Dunst 1.Nc3 f5 2.g4Glatz Gambit; Busch-Gass Gambit 1.e4 e5 2.Nf3 Bc5Gledhill Attack, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.Qg4Glek Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Na6Gligoric Variation, Ruy Lopez; C69 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O f6Gligoric-Taimanov Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.Be3Gloria Variation, Sicilian 1.e4 c5 2.c4 d6 3.Nc3 Nc6 4.g3 h5Godes Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nd7Godiva Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qb6Goering Attack, Evans 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.Bg5Goering Gambit Declined, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 d5Goering Gambit, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3Goering Variation, Two Knights 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.Ne5Goglidze Attack 1.d4 Nf6 2.c4 g6 3.f3 d5Goldman Variation, Caro 1.e4 c6 2.Nc3 d5 3.Qf3Golombek Defense, English; Anti English 1.c4 Nf6 2.Nc3 d5Gossip Variation, QP 1.d4 d5 2.Nf3 Nf6 3.Bg5 Ne4Grand Prix Variation, Sicilian 1.e4 c5 2.Nc3 d6 3.f4Graz Variation, Ruy 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Bc5Great Snake, English 1.c4 g6 Greco Defense 1.e4 e5 2.Nf3 Qf6Greco Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.f4Greco Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 h6 6.d4 d6Greco Variation, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.O-O Nxc3Greco Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Bc5Greco Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qe7Greco Variation, QGA 1.d4 d5 2.c4 dxc4 3.e4 b5Greco; Calabrian Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 h6 6.d4 d6 7.hxg5 hxg5 8.Rxh8 Rxh8 9.Nc3Greco-Lolli; Wild Muzio Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Bxf7+Green; Kolisch Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 d6Grevo Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4Grigorian Variation, Polish 1.b4 Nc6Grigoriev Variation, French 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.Qg4Grigoriev Variation, Sicilian 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-OGrimm Attack, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.d4 d6 7.e5Grinberg Gambit, Old Indian 1.d4 Nf6 2.c4 d6 3.Nc3 Bf5 4.e4Grob Gambit 1.g4 d5 2.Bg2 Bxg4Grob; Ahlhausen; Colibri; Fric; Genoa; Spike 1.g4Grosshans Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Bd7Gruenfeld Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bf5 6.Ne5 c6 7.g4Grunfeld Defense, Veresov 1.d4 d5 2.Nc3 Nf6 3.Bg5 Nbd7 4.Nf3 g6Grunfeld Defense; D80 1.d4 Nf6 2.c4 g6 3.Nc3 d5Grunfeld Gambit, Tarrasch 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.dxc5 d4 7.Na4 b5Grunfeld Gambit; D83 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O
Grunfeld Variation, Bogo-Indian 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Nbd2Grunfeld Variation, QP 1.d4 d5 2.Nf3 Nf6 3.Bg5 g6Guatemalan Defense 1.e4 b6 2.d4 Ba6Gubinsky-Melts Defense, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6Gufeld Gambit, Sicilian 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.c3 e5 6.d4Guimard Variation, French 1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.Ngf3 Nf6 5.e5 Nfd7Gunderam Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.g4 Bg6 6.h4Gunderam Defense, BDG; Rook Pawn Defense 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 h5Gunderam Gambit 1.e4 e5 2.Nf3 c6Gunderam Gambit 1.e4 e5 2.Nf3 Qe7 3.Bc4 f5Gunderam Gambit, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.f3Gunderam; Tartakower Var, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bf5Gunsberg Defense, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 c5Gunsberg Defense, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Bb5 Nd8Gunsberg Defense; Prianishenmo Gambit, QGA 1.d4 d5 2.c4 dxc4 3.Nc3 c5 4.d5 Nf6 5.Nc3 e6 6.e4 exd5 7.e5Gunsberg Variation, Four Kngiths 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.a3Gurgenidze Defense, Modern Defense 1.e4 g6 2.d4 Bg7 3.Nc3 c6 4.f4 d5 5.e5 h5Gurgenidze System, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 g6Gurgenidze Variation, Caro 1.e4 c6 2.d4 d5 3.Nc3 b5Gurgenidze Variation, Caro 1.e4 c6 2.d4 d5 3.Nc3 g6 4.e5 Bg7 5.f4 h5Gurgenidze Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.Re1 e5 6.b4Gurgenidze Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Nf6 6.Nc3 Nxd4 7.Qxd4 d6Gusev Countergambit, QGD 1.d4 d5 2.c4 c5 3.cxd5 Nf6Haberditz Variation, French 1.e4 e6 2.d4 d5 3.Nd2 f5Haberditz Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3 b5Haberditz Variation, QGD 1.d4 d5 2.c4 c5 3.cxd5 Nf6 4.e4 Nxe4 5.dxc5 Qa5+Habichd; Hawk Variation, Benoni 1.d4 c5 2.d5 Nf6 3.Nf3 c4Halasz Gambit, Sicilian 1.e4 c5 2.d4 cxd4 3.f4Halasz-Jacobsen Gambit 1.e4 e5 2.Nf3 d5 3.exd5 Bd6Halasz-McDonnell Gambit 1.e4 e5 2.d4 exd4 3.f4Half Giuoco Piano; Semi-Italian Opening 1.e4 e5 2.Nf3 Nc6 3.Bc4 d6Halibut Gambit, English 1.c4 b5Hall Variation, Center 1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qc4Halloween Gambit, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Nxe5Hammer Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 f6Hammerschlag; Pork Chop Opening 1.f3 e5 2.Kf2Hamppe Meitner, Vienna 1.e4 e5 2.Nf3 Bc5 3.Na4Hamppe-Allgaier Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.h4 g4 6.Ng5Hamppe-Allgaier-Thorold Gambit 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.h4 g4 6.Ng5 h6 7.Nxf7 Kxf7 8.d4Hamppe-Mietner Variation, Vienna 1.e4 e5 2.Nc3 Bc5 3.Na4Hamppe-Muzio Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.Bc4 g4 6.O-OHanham; Hayward 1.c3 e5 2.Qc2Hanham; Lord Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7Hans Mullers; Vienna V 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5Hanstein Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.O-OHarding Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 d5 4.Nxe5 Qg5 5.Nxc6Harksen Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.c4Harrwitz Attack, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Be7 5.Bf4Harrwitz; Rubinstein Var, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bf4Hartlaub Gambit Accepted 1.d4 e6 2.c4 b6 3.Nc3 Bb7 4.e4 f5 5.exf5 Nf6Hartlaub Gambit Declined 1.d4 e6 2.c4 b6 3.Nc3 Bb7 4.e4 f5 5.d5Hartlaub Gambit, English 1.c4 b6 2.d4 Bb7 3.Nc3 e6 4.e4 f5 5.exf5 Nf6Hastings Defense, Benoni 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
Hastings Variation, QGD 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 h6 5.Bxf6 Qxf6 6.Nc3 c6 7.Qb3Hawk Variation, Benoni 1.d4 c5 2.d5 Nf6 3.Nf3 e4Heath Variation, KGD; Rotlewi Countergambit 1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.b4Hector Gambit, Caro 1.e4 c6 2.Nc3 d5 3.Nf3 dxe4 4.Ng5Hedgehog Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7Hedgehog Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 g6Hedgehog Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 g6Hedgehog Variation, Symmetrical English 1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7Hegehog System, Anglo-Indian English; A17 1.c4 Nf6 2.Nc3 e6Hein Countergambit, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 d5Hekili-Loa Gambit, Owen Defense 1.e4 b6 2.d4 c5 3.dxc5 Nc6Henneberger Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Be3Henneberger; Swiss Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 a6Heral Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.Bxf6Herford Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 Qh4Hergert Gambit #1, Trompowsky 1.d4 Nf6 2.Bg5 Ne4 3.Bh4 d5 4.f3 Nf6 5.Nc3 Bf5 6.e4Hergert Gambit #2, Trompowsky 1.d4 Nf6 2.Bg5 Ne4 3.Bh4 c6 4.Nd2 Qa5 5.c3 Nxd2 6.Qxd2 d5 7.e4Hergert Gambit, Trompowsky 1.d4 Nf6 2.Bg5 Ne4 3.h4 Nxg5 4.hxg5 e5Herrstrom Gambit, Reti 1.Nf3 g5Herzfeld; Portuguese; Vienna, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nc6Hevendehl Gambit, Dutch 1.d4 f5 2.g4 e5Hickmann Gambit, English 1.c4 f5 2.e4Hickmann Gambit, English 1.c4 f5 2.e4 fxe4 3.d3Hillbilly Attack, Caro-Kann 1.e4 c6 2.Bc4Hinrichsen Gambit, KGD 1.e4 e5 2.f4 d5 3.d4Hobbs Gambit, Bird 1.f4 g5Hoffman Gambit 1.e4 e6 2.d4 d5 3.Qe2 e5 4.f4 exf4Holloway Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Nc6Hopton Attack, Dutch 1.d4 f5 2.Bg5Hornung Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.Be3Horny Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.Qxg4 Nf6 8.Qxf4Horsefly Defense, Bird 1.f4 Nh6Horsefly Gambit 1.d4 Nf6 2.c4 Nc6 3.d5 Ne5 4.f4Horwitz Attack, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nb5Horwitz Defense 1.d4 e6Horwitz Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.Nc3 b5Howell Attack, Ruy Lopez; C81 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.Qe2Hromadka Defense; Loose Gambit: A56 1.d4 Nf6 2.c4 c5Hromadka System, Benoni 1.d4 Nf6 2.c4 c5 3.d5 d6Hromadka Variation, Bishop 1.e4 e5 2.Bc4 Nf6 3.d3 Nc6 4.Nc3 Bb4 5.Ne2Hubsch Gambit 1.d4 d5 2.Nc3 Nf6 3.e4 Nxe4Huebner Deferred, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 c5Huebner Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 Nc6 6.Nf3 Bxc3Huebner Variation, Nimzo-Indian; E41 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5Huebsch Gambit 1.d4 Nf6 2.Nc3 d5 3.e4 Nxe4Hungarian Attack, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 4.Rb1Hungarian Attack, Grunfeld; D92 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4 Hungarian Defense 1.e4 e5 2.Nf3 Nc6 3.Bc4 Be7Hungarian Gambit, Catalan 1.d4 Nf6 2.c4 e6 3.g3 e5Hungarian Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 a6Hunt Gambit, Alekhine; Two Pawn Attack 1.e4 Nf6 2.e5 Nd5 3.c4Hunt Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.c5Hurst Attack, Grob 1.g4 e5 2.Bg2 d5 3.c4
Hyperaccelerated Dragon, Sicilian 1.e4 c5 2.Nf3 g6Hyperaccelerated Pterodactyl, Sic 1.e4 c5 2.Nf3 g6 3.d4 Bg7Iago Defense 1.d4 Nf6 2.c4 Nc6Icelandic Defense, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Bd2 Ne7 6.f4Icelandic-Palme Gambit, CC 1.e4 d5 2.exd5 Nf6 3.c4 e6Ilyin-Genevsky Variation, Dutch 1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nf3 Be7 5.O-O O-O 6.c4 d6Ilyin-Zhenevsky Variation, Dutch; A97 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d6 7.Nc3 Qe8Improved Lisitsin G, Reti 1.Nf3 f5 2.d3Improved Steinitz Defense, Ruy Lopez; C66 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6Indian Defense; A45 1.d4 Nf6Indian Opening 1.e4 e5 2.d3Indian Variation, Larsen 1.b3 Nf6 Intermezzo Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nxc6 Qf6Inverted Hanham Opening 1.e4 e5 2.Nf3 Nc6 3.Be2 Nf6 4.d3 d5 5.Nbd2Irish Attack; Polish Attack 1.Nc3 e5 2.f4Irish Gambit, QP 1.d4 d5 2.Nc3 c5Italian Four Knights Variation 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6 5.Nc3 Italian Game; C50 1.e4 e5 2.Nf3 Nc6 3.Bc4Italian Variation, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bc4Italian Variation, Four Knights Game 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Nc3 Nf6Italian Variation, Ruy Lopez 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 Bc5Ivanchuk Defense, Caro Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Ng5 Ndf6Ivanov Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Qb6Jaenisch Counter-Attack, Philidor; Nimzovich Variation 1.e4 e5 2.Nf3 d6 3.d4 Nf6Jaenisch Counterattack, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 Nf6Jaenisch Gambit Accepted, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.exf5Jaenisch Gambit Deferred, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 f5 5.exf5Jaenisch Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Nf6Jaenisch Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Qf6Jaenisch Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O Nc6 8.c4Jaffe Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.c3Jaffe Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.Bd3 e5Jalalabad Defense 1.e4 e5 2.Nf3 c5Jalalabad Variation, Sicilian 1.e4 c5 2.Nf3 e5Janowski Variation, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 Bxc3 7.bxc3 d6 8.Re1Janowski Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Be3Janowski Variation, Old Indian 1.d4 Nf6 2.c4 d6 3.Nc3 Bf5Janowski Variation, Orthodox Defense, QGD 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.h4Janowski Variation, QGD 1.d4 d5 2.c4 Nc6 3.Nc3 dxc4 4.Nf3Janowski Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 a6Janzen-Korchnoi Gambit, Dutch 1.d4 f5 2.h3 Nf6 3.g4Jerome Gambit; Kentucky Opening 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ John Tracy Gambit, Alekhine 1.e4 Nf6 2.Nf3Jordansky Attack, 2 Knights 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.Ne4 Be6 10.Bg5Kadas Gambit, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 c6 4.dxc6 e5Kadas Opening 1.h4Kahiko-Hula Gambit, English 1.c4 e5 2.e3 Nf6 4.f4 exf4 4.Nf3Kalashnikov Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6Kampars Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.g4 Bg6 6.g5 Nd5 7.fxe4Kan Formation, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 a6Kan Line, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Nxd4 e6Kan Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Ne2 dxe4 5.a3 Bxc3+ 6.Nxc3 Nc6Kapengut; Smyslov; Modern V, English 1.c4 e5 2.Nc3 Nf6 3.g3 Bb4
Karklins-Martinovsky Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nd3Karniewski; Tubingen Variation, Polish 1.b4 Nh6Karpov Gambit, Ruy Lopez 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 d4Karpov Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.c4 Nb6 6.h3 Bg7 8.Be2Karpov Variation, Caro-Kann; B17 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7Kasparov Attack, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Ng3Kasparov Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3Kasparov-Petrosian Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3Katalimov Variation, Sicilian 1.e4 c5 2.Nf3 b6Kaufmann Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.c4Kaufmann Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Bc5 5.Be3Kaufmann Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Nf3 Bg4 6.Qe2Kaulich Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c5Kavalek Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Qa5Kazakh Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Na6Kecskemet; Timbuktu Var, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6 7.c3 O-O 8.d4 Bd7 9.Nbd2 Be8Keene Defense, Grob 1.g4 d5 2.h3 e5Keene Defense, KGD 1.e4 e5 2.f4 Qh4+ 3.g3 Qe7Keene; Stean Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 O-O 6.Nd5 Re8 7.Qf5Keidansky Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.Nf3 Nxe4 5.Qxd4Kemeri Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5 5.cxd5 Nxd5 6.Nf3 O-O 7.O-O c5Kemeri Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.g3Kemeri Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.g3Kemeri; Neo-Grunfeld 1.d4 Nf6 2.c4 g6 3.g3 d5Kennedy Variation, Nimzovich 1.e4 Nc6 2.d4 e5Keoni-Hiva Gambit 1.e3 d5 2.Nc3 Nf6 3.a3 e5 4.f4 exf4 5.Nf3Keres Attack, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.Nc3Keres Defense, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O c5 6.cxd5 Nxd5 7.Nc3 Nc6Keres Defense, English 1.c4 e5 2.Nc3 d6 3.g3 c6Keres Defense, Indian; Kangaroo Defense 1.d4 e6 2.c4 Bb4+Keres Defense, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 b6Keres Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nd7Keres Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.Bc4 Nb6 6.Bb3 Bg7 7.a4Keres Variation, English; A23 1.c4 e5 2.Nc3 Nf6 3.g3 c6Keres Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 8.Be2 Nfd7 9.Be2 Nb6 10.Qd3 Nc6 11.O-O-O Qc8Keres Variation, KGD 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Nd2Keres Variation, KID 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.h4Keres Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.cxd5 Nxd5 8.dxc5Keres Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 d5 5.a3 Bxc3+ 6.bxc3 c5 7.cxd5 exd5 8.Bd3 O-O 9.Ne2 b6Keres Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O b6Keres Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6 5.Nc3Keres Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c4Keres Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 a5Keres Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Nd7Keres, Mason, Parnu, Requena 1.e4 e5 2.f4 exf4 3.Nc3Keres; Billium Attack, Sicilian; Chameleon 1.e4 c5 2.Ne2Keres; Estonian; Howell; Moscow Var 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6Keres; Panov Variation, Sicilian; B81 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g4Keres-Parma System, English 1.c4 c5 2.Nc3 Nf6 3.Nf3 e6 4.g3 Nc6Kevitz Defense, English 1.c4 Nf6 2.Nc3 e6 3.e4 Nc6Kevitz Variation, Ruy Lopez 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.Re3Khan Gambit, Bishop 1.e4 e5 2.Bc4 d5Kholmov Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nxe4 4.Qe2 Qe7
Kholmov System, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bc4Kholmov Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Be6Kiddie Countergambit 1.e4 e5 2.Qh5 Nf6Kiel Variation, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nb4Kieseritzky Gambit, Bishop's Gambit, KGA 1.e4 e5 2.f4 exf4 3.Bc4 b5Kieseritzky Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5Kieseritzky System, Sicilian 1.e4 c5 2.Nf3 a6 3.b3Kieseritzky; Morphy Var, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3King David's Opening 1.e4 c5 2.Ke2King Pawn Game; C20 1.e4 e5King Pawn lines, Benoni; A65 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4King Walk Variation, 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 Bg7 10.Kg2 O-OKing"s Indian Attack 1.e4 e6 2.d3 Kingfisher Gambit, Dutch 1.d4 f5 2.Nc3 d5 3.e4King's Bishop Variation, Ruy Lopez Exchange 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Bd6King's English; A20 1.c4 e5 King's Gambit Accepted; C33 1.e4 e5 2.f4 exf4King's Gambit Reversed 1.e4 e5 2.d3 f5King's Gambit Reversed, Bishop 1.e4 e5 2.Bc4 f5King's Gambit; C30 1.e4 e5 2.f4King's Head 1.e4 e5 2.f3 King's Head Opening 1.f3 e5 2.e4King's Head Opening 1.e4 e5 2.f3 Nf6 3.Nc3King's Indian Attack; Reti; Zukertort; A05 1.Nf3 Nf6King's Indian Defense; West Indian Defense; D70 1.d4 Nf6 2.c4 g6King's Indian Defense; West Indian Defense; E60 1.d4 Nf6 2.c4 g6King's Indian System, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 g6King's Indian Variation 1.d4 Nf6 2.Nf3 g6 3.e3 Bg7 4.Bd3 d6King's Knight Gambit, KGA; C34 1.e4 e5 2.f4 exf4 3.Nf3King's Knight Opening; C40 1.e4 e5 2.Nf3King's Knight Variation, English 1.c4 e6 2.Nf3 d5King's Knight Variation, English 1.c4 Nf6 2.Nf3King's Knight Variation, KID 1.d4 Nf6 2.c4 g6 3.Nf3Kingside move order, Benoni 1.d4 c5 2.d5 Nf6 3.Nf3Kitchner Folly, Bishop 1.e4 e5 2.Bc4 Nf6 3.d3 Be7 4.Nf3 O-OKlein Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Bc4Kling & Horwitz Counter-Attack, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O Qe7Kloss Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.O-O O-O 8.Kh1Kloss Gambit, Two Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nb4Kmoch Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.Bc4 Nb6 4.Bb3 c5 5.d3Kmoch Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.f3Knight Defense, QGD; D51 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7Knight Variation, Caro 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6Knight Variation, French 1.e4 e6 2.Nf3Knight Variation, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3Knights Variation, Indian Game; A46 1.d4 Nf6 2.Nf3Knoore Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Nc3Koch Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.e5Koch; Ghulam Kassim Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4Kondratiyev Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd3 c5 5.exd5 Qxd5 6.Bd2Konikowski Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 d5Konstantinopolsky Opening 1.e4 e5 2.Nf3 Nc6 3.g3Koola-Koola 1.h4 a5
Kopaiev Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 f5 6.exf5 Bxf5 7.O-OKopec System, Sicilian 1.e4 c5 2.Nf3 d6 3.Bd3Korchnoi Attack, KID 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.Bd2Korchnoi Defense, Sicilian 1.e4 c5 2.Nc3 e6 3.g3 d5Korchnoi Gambit, QGA 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Kf1Korchnoi Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.a3Korchnoi Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5Korchnoi's Variation, Dutch 1.d4 f5 2.h3Korchnoi's Variation, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.g3 Bg7 6.Bg2 e5Kornl Richter Gambit, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Bf4 Nc6 5.Nf3 Bb4+ 6.Nc3 Bxc3+Kostic Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 Be7Kostic Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Nf6 5.exf5 Bc5Kotov Gambit 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4 gxf3 6.Bxf4Kotov Gambit, Sicilian 1.e4 c5 2.Nf3 d6 3.g3 b5Kotov Variation, Modern 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 Nc6Kotov-Robatsch Defense 1.d4 g6 2.c4 Bg7Kozul Gambit, KID 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.Be3 f5Kramer Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.Nge2Kramnik Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Re1Kramnik Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.c4Kramnik's Line, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.h3Kramnik-Shirov Variation, English 1.c4 e5 2.Nc3 Bb4Krause Attack, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5Krause Gambit, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.Nxe5Krause Variation, Dutch 1.d4 f5 2.c4 Nf6 3.Nc3 d6 4.Nf3 Nc6Krause Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.O-OKraus-Muhlherr Counter Gambit 1.d4 Nf6 2.f3 d5 3.e4 e5 4.dxe5 Nxe4Krazy Kat 1.Nh3 e5 2.f3 d5 3.Nf2Kreijcik Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.f3 Bc5 4.Ne2 Nc6 5.b4Krejcik Gambit 1.e4 e5 2.f3 Nf6 3.Bc4 Bc5 4.Ne2 Nc6 5.b4Krejcik Variation, Alekhine 1.e4 Nf6 2.Bc4 Kunin Double Gambit, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2 dxe4 5.Qg4 Qxd4Kupreichik Variation, Center 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.Bc4Kupreichik Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bd7Kurajica Defense, English 1.c4 e6 2.Nf3 d5 3.g3 c6Kurajica Variation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be3Kurkin Gambit, Two Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5 6.Bf1 h6 7.Nxf7Kveinis Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Qb6Labourdonnais Gambit 1.e4 e5 2.Nf3 Qf6 3.Bc4 Qg6 4.O-OLabourdonnais Variation, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 d6 5.d4 exd4 6.cxd4 Bb6Labourdonnais-Denker Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.b4 Bxb4 4.c3Lamb Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Nc6Lanc-Arnold Gambit, Center 1.e4 e5 2.d4 exd4 3.Nf3 Bc5 4.c3Landau Gambit, Caro-Kann 1.e4 c6 2.d4 d5 3.Bd3 Nf6 4.e5 Nfd7 6.e6Landau Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Qb3 Qc8 7.Bd2 e6 8.Na3Lange Gambit; Alfred Lange Gambit; Simple Variation 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nxe4Lange Variation, Evans Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bb6 5.b5 Na5 6.Nxe5 Nh6Langeheinecke Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e3Larobok Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Nc3 Nbd7Larsen Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Bf5Larsen Defense, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.O-O Qc7 8.Qe2 Bd6Larsen Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 dxe5Larsen Variation, Grunfeld 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
Larsen Variation, Grunfeld 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 b6Larsen Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be3Larsen Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Nxd4 g6Larsen Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.e4 b4 10.Na4 c5Larsen; Janowski; Modern Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Bg4Larsen; Queen's Fianchetto; Nimzo-Larsen Attack A01 1.b3Larsen-Santasiere (McDonnell Attack) Variation, Sicilian; 1.e4 c5 2.f4Lasa Gambit 1.e4 e5 2.c3 f5Lasker Defense, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.O-O Bb6Lasker Defense, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 Ne4Lasker Simul Special 1.g3 h5Lasker Trap, QGD 1.d4 d5 2.c4 e5 3.dxe5 d4 4.e3 Bb4+ 5.Bd2 dxe3Lasker Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5Lasker Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bg4 6.h3Lasker Variation, Dutch 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 g6 5.f3Lasker Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Bxc3Lasker Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Qe2Lasker Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 Qxe7Lasker-Pelikan Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5Latvian Gambit Accepted 1.e4 e5 2.Nf3 f5 3.exf5Latvian; Greco Counter-Gambit 1.e4 e5 2.Nf3 f5Lazard Gambit, Chigorin Defense 1.d4 d5 2.c4 Nc6 3.Nf3 e5Lazard Gambit; Maddigan Gambit 1.d4 Nf6 2.Nd2 e5Lazy Knight Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 Nd7Leko Gambit 1.d4 Nf6 2.c4 g6 3.f3 e5Lemberger Counter-Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e5Lemming Defense 1.e4 Na6Leningrad Variation, Dutch 1.d4 f5 2.c4 Nf6 3.g3 g6Leningrad Variation, French 1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.Ngf3 Nf6 5.e5 Nfd7 5.f4 c5 6.c3 Nc6 7.Ndf3 cxd4 8.cxd4Leningrad Variation, Nimzo-Indian; E30 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5Leonardo (Stamma) Gambit, KGA 1.e4 e5 2.f4 exf4 3.h4Leonhardt (Rosen) Gambit, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.b4Leonhardt Defense, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.Nxe5 Qe7Leonhardt Variation, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 b5Leonhardt Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4 fxe4 5.Nc3Leonhardt Variation, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 Nf6Leonhardt Variation, Ruy Lopez 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 Na5 9.Bc2 c5 10.d4 Qc7 11.h3 Nc6 12.d5 Nd8 13.Nbd2 g5Leonhardt Variation, Sicilian; B88 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6Lesser Bishop; Tartakower 1.e4 e5 2.f4 exf4 3.Be2Lesser Simagin (Spassky) Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O Bf5Lessing Defense 1.Nf3 Nc6Levenfish Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 b6Levenfish Variation, Sicilian; B71 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.f4Levenstein; Queen's Defense; Brazilian; Gunderam 1.e4 e5 2.Nf3 Qe7Lewis Countergambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.c3 d5 4.Bxd5 Nf6Lewis Counter-Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.c3 d5Lewis Defense, Italian; Closed Variation 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7Lewis Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.d4L'Hermet Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Nd6Lichtenhein Defense, Petroff 1.e4 e5 2.Nf3 Nf6 3.Bc4 Nxe4 4.Nc3 d5Lilienthal Variation, Semi-Slav 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 Nbd7Linares Variation, QGA 1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5 Nf6 5.Nc3 b5Linder Counter Gambit 1.d4 Nf6 2.f3 e6 3.e4 Nxe4
Linksspringer Variation, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.d5Lion Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Nc3 Nf6Lion's Jaw, Pirc 1.e4 d6 2.d4 Nf6 3.f3Lipnitzky Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4Lisbon Gambit 1.d4 d6 2.c4 e5 3.dxe5 Nc6Lisbon Gambit, Dutch; Krejcik Gambit 1.d4 f5 2.g4Lisitsin Gambit; Polish Gambit 1.Nf3 f5 2.e4 Lithuanian Variation, Mikenas 1.d4 Nc6 2.c4 e5 3.d5 Nce7Lizard Defense; Pirc-Diemer Gambit 1.d4 g6 2.h4 Nf6 3.h5Ljubojevic Line, Sicilian 1.e4 c5 2.Nf3 a6 3.c3 b5Ljubojevic Variation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Bc4Lobster Gambit, Latvian 1.e4 e5 2.Nf3 f5 3.g4Locock Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Ng5 h6 5.Nxf7Lodz; Schlecter; Rubinstein Var, QGD; D33 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3Loehn Gambit, English 1.c4 d5 2.cxd5 e6Lolli Attack, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.d4Lolli Attack, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 Nxd4Loman Defense, 2 Knights 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 g6London Defense, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bb4+London System 1.d4 Nf6 2.Nf3 e6 3.Bf4London System, Torre Attack 1.d4 Nf6 2.Nf3 g6 3.Bf4London System; Queen's Bishop Opening 1.d4 d5 2.Nf3 Nf6 3.Bf4London V; New York V, Reti 1.Nf3 d5 2.c4 c6 3.b3 Nf6 4.Bg2 e6 5.Bb2 Nbd7London Variation 1.d4 Nf6 2.Nf3 g6 3.Bf4 Bg7 4.Nbd2Long Whip Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 h5Lopez Counter-Gambit, Philidor 1.e4 e5 2.Nf3 d6 3.Bc4 f5Lopez Defense, KGA 1.e4 e5 2.f4 exf4 3.Bc4 c6Lopez Four Knights, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Nc3Lopez Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.Qe2 Nf6 4.f4Lopez Variation, Bishop 1.e4 e5 2.Bc4 Bc5 3.Qe2Louma Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nxc6Lputian Variation, French 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.a3 Nh6Lucchini Gambit; Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 f5Lucena Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Be7Lundin Defense 1.d4 Nc6Lundin Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5 Ne4 5.Nxe4 dxc3 6.Qd2 c5Lundin; Bronstein Counter-Gambit 1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 b5Lundin; Neo-Meran 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4Lutikov Gambit, Sicilian 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.c3 Nf6 6.d4Lutikov Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3Lutikov Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.Bc2Lutikov Variation, Ruy Lopez 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.Bd2Lutikov Variation, Ruy Lopez Exchange 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6MacDonnell Attack, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.d4 Ne7 7.g3MacDonnell Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.b4MacDonnell Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Nc3Mackenzie Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4Macleod Attack 1.e4 e5 2.c3MacLeod Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 Nc6MacLopez; Relfsson Gambit, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bb5Mad Dog Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.h4Maddigan Gambit 1.d4 Nf6 2.Nc3 e5Mafia Defense, KGD 1.e4 e5 2.f4 c5
Mail Line, Latvian Gambit Accepted 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4Main Line, Benko Gambit Declined 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nf3Main Line, Canal Attack, Sicilian; B52 1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 Main Line, Czech Variation, Slav; D19 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.Qe2Main Line, Evans Gambit; C52 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5Makogonov Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.b4Makogonov Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.b4Makogonov Variation, KID; E71 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.h3Malaniuk Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bb4+Malich Gambit 1.d4 Nf6 2.Nc3 d5 3.Bg5 c5 4.Bxf6 gxf6 5.e4 dxe4 6.d5Malkin Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5Maltese Falcon 1.d4 Nf6 2.g4 Nxg4 3.f3 Nf6 4.e4Malvinas Variation, English 1.c4 d5 2.cxd5 Qxd5 3.Nc3 Qa5Manhattan Gambit, Dutch 1.d4 f5 2.Qd3 Nf6 3.g4Manhattan; Westphalia Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 Bb4Mannheim Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Qa4+Mao Tse Tung; Duras 1.e4 f5Mareschall Variation, Slav; Lasker Variation 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 Na6Margate (Vitolins) Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Bb5Marienbad Variation 1.d4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 c5Marienbad Variation, Sicilian 1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5 5.Bb2Mariotti Gambit 1.e4 e5 2.Nc3 Nc6 3.g3 Bc5 4.Bg2 h5 5.Nf3 h4Maroczy Bind, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.c4Maroczy Bind, Sicilian; B36 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4Maroczy Defense, Pirc 1.e4 d6 2.d4 e5Maroczy Gambit 1.e4 e5 2.Nf3 d5 3.exd5 Bd6Maroczy Gambit, Caro-Kann 1.e4 c6 2.d4 d5 3.f3 dxe4 4.fxe4 e5 5.Nf3 exd4 6.Bc4Maroczy Line, Sicilian Dragon 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 Na5Maroczy Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Ne2Maroczy Variation, Alekhine 1.e4 Nf6 2.d3Maroczy Variation, Caro 1.e4 c6 2.d4 d5 3.f3Maroczy Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 a6Maroczy; Elephant Gambit 1.e4 e5 2.Nf3 d5 3.exd5 Bd6Maroczy-Willis Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 cxd4 6.axb4 dxc3Marshall (Euwe) Attack, KGD 1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.c3 Bg4 5.fxe5 dxe5 6.Qa4+Marshall Attack, Ruy Lopez 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 d5Marshall C-G, KGD 1.e4 e5 2.f4 d5 3.exd5 c6Marshall Counter-Attack, Ruy Lopez 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.d4 Marshall Defense; Knight Defense, QGD 1.d4 d5 2.c4 Nf6 Marshall Gambit, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bc5 5.Nxe5 Nd4 6.Ba4 O-OMarshall Gambit, Nimzovich 1.e4 Nc6 2.d4 d5 3.exd5 Qxd5 4.Nc3Marshall Gambit, Scandanavian G; Modern Variation, CC 1.e4 d5 2.exd5 Nf6 Marshall Gambit, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 Marshall Gambit, Sicilian 1.e4 c5 2.Nc3 e6 3.d4 d5Marshall Gambit, Tarrasch 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.e4Marshall Variation, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Bc5 6.e5 d5 7.exf6 dxc4 8.Re1+ Be7 9.Ng5 Qd5 10.Nc3 Qf5Marshall Variation, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5Marshall Variation, French 1.e4 e6 2.d4 d5 3.Nc3 c5Marshall Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6Marshall Variation, Sicilian 1.e4 c5 2.b4 cxb4 3.a3 Marshall Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 d5Masi Variation, Caro-Kann 1.e4 c6 2.d4 Nf6Mason Attack, Queen Pawn Game 1.d4 d5 2.f4
Mason Countergambit, Latvian 1.e4 e5 2.Nf3 f5 3.d4Mason Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.O-OMason Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O O-OMason-Showalter Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Nc6Massachussets Defense, Caro-Kann 1.e4 c6 2.d4 f5Masur Gambit 1.e4 g6 2.d4 Nh6 3.Nc3 f5 4.Bxh6 Bxh6 5.exf5 O-OMatanovic Attack, Sicilian; B82 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4Matovinsky Gambit 1.e4 b6 2.d4 Bb7 3.Bd3 f5Matovinsky Gambit 1.e4 b6 2.d4 Bb7 3.Bd3 f5 4.exf5 Bxg2 5.Qh5+ g6Matsukevich Gambit, Alekhine 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Nc3 Nxc3 6.dxc3 d6 7.Bg5Matulovic Variation, Dutch; A89 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 Nc6Maurian Defense, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Nc6Max Lange Attack 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Bc5 6.e5Mayet Attack, Latvian 1.e4 e5 2.Nf3 f5 3.Bc4 Mayet Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.d4 d6 6.c3Mazedonisch Variation, English 1.c4 e5 2.Nc3 Nf6 3.f4McConnell Defense 1.e4 e5 2.Nf3 Qf6McCutcheon Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4McDonnell Attack, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.g3 McDonnell Defense, QGA 1.d4 d5 2.c4 dxc4 3.e4 e5McDonnell Double Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.b4 Bxb4 4.f4Mecking Variation, Symmetrical English; A39 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4Mediterranean Defense, French 1.e4 e6 2.d4 Nf6Medusa Gambit 1.d4 Nf6 2.c4 g5Meitner-Mieses Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.Bc4 Bc5 4.Qg4 Qf6 5.Nd5Mellon Gambit 1.e4 e5 2.Qh5 Nc6 3.Bc4 Nh6 4.d3 g6 5.Qf3 f6 6.Ne2 d5Mengarini Gambit, Sicilian 1.e4 c5 2.a3 Mengarini Gambit, Sicilian 1.e4 c5 2.a3 Nc6 3.b4Mengarini Opening 1.e4 e5 2.a3Mengarini Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.a3Meran Variation, QGD; D47 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4Mestel Variation, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7 5.d4 Bb6 6.Bg5Metger Unpin Variation, 4 Knights 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 Nd8Middleton Counter-Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 d6 5.O-O Bg4 6.h3 h5 7.hxg4Mieses Defense, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O Nge7Mieses Gambit, Caro 1.e4 c6 2.d4 d5 3.Be3Mieses Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6Mieses Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6Mieses Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.g3Mieses; Nimzovich Var, BDG 1.d4 d5 2.e4 dxe4 3.f3 Nc6Mieses; Nimzovich Var, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nc6 Mieses; Valencia; Venezuelan Opening 1.d3 Mieses-Kotroc Variation, Center Counter 1.e4 d5 2.exd5 Qxd5Miguel Gambit 1.e4 e5 2.Bb5 Bc5 3.b4Mikenas Gambit, Alekhine 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Bc4 e6 6.Nc3 d6 7.Nxd5 exd5 8.Bxd5Mikenas V, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.e5Mikenas Variation, Nimzovich Defense 1.e4 Nc6 2.d4 d6Mikenas-Carls Variation, English 1.c4 Nf6Mikhalchishin Line, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.e4 dxe4 8.Nxe4 Nxe4 9.Qxe4 e5 10.dxe5Miladinovic Gambit, QGD 1.d4 d5 2.c4 e6 3.Nc3 Be7 4.e4 dxe4 5.f3Miles Defense, KGD 1.e4 e5 2.f4 Nc6 3.Nf3 f5Miles Gambit, KGD 1.e4 e5 2.f4 d5 3.exd5 Bc5Miles Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Bf4
Millenium Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Bd3Millennium Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Qg6Milner-Barry Gambit, Caro; Rasa-Studier Gambit 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.f3Milner-Barry Gambit, French 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3Milner-Barry Gambit, French 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3 cxd4 7.cxd4 Bd7 8.O-O Nxd4 9.Nxd4Milner-Barry Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6 5.Nf3 d6Milner-Barry, Zurich Variation, Nimzo-Indian; E33 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6Minckwitz Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.dxe5Mindeno Variation, Caro-Kann 1.e4 c6 2.Nc3 d5 3.Nf3 Bg4Mittenberger Gambit, Modern Defense 1.e4 g6 2.d4 Bg7 3.Nc3 d5Mlotkowski Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Nc3Modern Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4Modern Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6Modern Bishop's Opening 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3Modern Defense 1.d4 g6 2.c4 Bg7 3.Nc3 d6Modern Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 Na6Modern Defense, Neo-Grunfeld 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O dxc4Modern Defense, QGA 1.d4 d5 2.c4 dxc4 3.e4 Nc6Modern Defesne, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nc3 Bb4Modern Gambit, Chigorin Defense 1.d4 d5 2.c4 Nc6 3.Nc3 Nf6 4.Nf3 dxc4Modern Line, Slav; D11 1.d4 d5 2.c4 c6 3.Nf3Modern Main Line, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3Modern Paulsen, Sicilian; B84 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6Modern Sharp Variation, Catalan 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Nc6 6.Qa4 Bb4+Modern Steinitz Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6Modern Transfer, Falkbeer Countergambit, KGD 1.e4 e5 2.f4 d5 3.exd5 exf4Modern Variation, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.e3Modern Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.Nd2Modern Variation, Larsen 1.b3 e5Modern Variation, QGD; D50 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5Modern Variation, Sicilian; B50 1.e4 c5 2.Nf3 d6Modern Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4Modern; English Variation, Accelerated Panov; Caro-Kann 1.e4 c6 2.c4Moehring Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 d5 6.Nxe5 dxe4 7.Nxc6 Qd5Moeller (Therkatz) Attack, Italian 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.d5Moeller Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Bc5Mokele Mbembe; Knight's Tour 1.e4 Nf6 2.e5 Ne4Mongoose Variation, Sicilian 1.e4 c5 2.Nf3 Qa5Mongredien Defense, Pirc 1.e4 g6 2.d4 Bg7 3.Nf3 b6Monkey's Bum, Pirc 1.e4 g6 2.Bc4 Bg7 3.Qf3 e6 4.d4Monster Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Be7Monte Carlo Variation, French 1.e4 e6 2.d4 d5 3.exd5 exd5 4.c4Montevideo Defense 1.d4 Nc6 2.d5 Nb8Monticelli 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.Bg5Moody Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Qe2 Nc6 4.d4Morgado Defense, Latvian 1.e4 e5 2.Nf3 f5 3.Bc4 Nf6Morozevich Variation, French 1.e4 e6 2.d4 d5 3.Nd2 Be7Morphy Attack, Evans 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 Morphy Defense Deferred, Smith-Morra Accepted 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.O-O b5 8.Bb3 Bc5Morphy Defense, KGD 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Nc3 Bb4 6.Bd2 e3Morphy Defense, Ruy Lopez; C68 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6Morphy Defense, Ruy Lopez; C70 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4Morphy Defense, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Bc5
Morphy Gambit, French 1.e4 e6 2.d4 d5 3.Nh3Morphy Gambit, Philidor 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Bc4Morphy Gambit, Sicilian 1.e4 c5 2.d4 cxd4 3.Nf3Morris Counter-Gambit 1.d4 d5 2.Bf4 c5 3.e4 dxe4Morris Gambit 1.d4 d5 2.Bf4 c5 3.e4 Mortimer Trap, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Ne7 5.Nxe5 c6Mortimer Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Ne7Moscow (Prins) Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3Moscow Gambit, Sicilian 1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.O-O Bd7 5.c3 a6 6.Bxc6 Bxc6 7.Re1 Nf6 8.d4 Bxe4 9.Bg5Moscow Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Qg4Moscow Variation, Sicilian; Canal Attack; B51 1.e4 c5 2.Nf3 d6 3.Bb5+Mosquito Gambit, Englund 1.d4 e5 2.dxe5 Qh4Motzko Variation, Ruy Lopez 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.Qd3Murey Attack, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3 c5 5.cxd5 Nxd5 6.Na4Murey Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 c5 8.e4 Nxc3 9.bxc3 Nc6 10.Bb2 cxd4 11.cxd4 Rc8 12.Rd1 Bd6Murret Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 Nc6Mutkin Countergambit, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.g4Muzio-Polerio Gambit, KGA; Wild Muzio 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-OMyers Attack, Sicilian 1.e4 c5 2.h4Myers Defense, English 1.c4 g5 2.d4 Bg7Myers Gambit, Alekhine 1.e4 Nf6 2.Nc3 d5 3.d3 dxe4 4.Bg5Myers Variation, Polish 1.b4 d5 2.Bb2 c6 3.a4Nachmanson Gambit, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Nxe4 6.Nc3Nadanian Attack 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.Na4Najdorf Variation, Sicilian; B90 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6Napoleon Attack 1.e4 e5 2.Qf3Napoleon Attack, Dunst 1.Nc3 e5 2.Nf3Napoleon Gambit, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 Nxd4 4.Nxd4 exd4 5.Bc4Napolitano Gambit, Symmetrical English 1.c4 c5 2.Nf3 Nf6 3.b4Naselwaus Variation, Owen's Defense 1.e4 b6 2.d4 Bb7 3.Bg5Nei Gambit, English 1.c4 Nf6 2.Nc3 e6 3.e4 c5 4.e5 Ng8Nenarokov Variation, Ruy Lopez 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 Ne7Neo Catalan Accepted, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4Neo Catalan Declined, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-ONeo Catalan, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6Neo Orthodox Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6Neo-Catalan, Reti 1.Nf3 d5 2.c4 e6 3.g3Neo-Cunningham Gambit, KGA; McCormick Defense 1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Nf6Neo-Grunfeld Defense 1.d4 Nf6 2.c4 g6 3.Nf3 d5Neo-Modern Defense 1.d4 g6 2.c4 Bg7 3.e4 e5Neo-Mongoloid Defense, Nimzovich 1.e4 Nc6 2.d4 f6Neo-Orthodox Variation, QGD; D54 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Rc1Neo-Steinitz Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 d6Nescafe Frappe Attack, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5Netherlands Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 f5Neumann Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nc6Neumann Gambit, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.Bc4New Caro-Kann 1.e4 c6 2.d4 d5 3.Nd2 g6Nightingale Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Na5 6.Bxf7+Nikitin Gambit, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Bb5 dxe4 5.Nxe5 Qd5 6.Qa4Nimzo-Dutch Variation 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Bb4+Nimzo-English Opening 1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4Nimzo-Indian Defense 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4
Nimzovich Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.Ne5Nimzovich Attack, French 1.e4 e6 2.d4 d5 3.e5 c5 4.Qg4Nimzovich Attack, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Ne3Nimzovich Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Nc3Nimzovich Attack, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Qa4+Nimzovich Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 d6 4.d4 Bd7 4.Nc3 Nf6 5.Bxc6Nimzovich Attack; Anti-Grunfeld; Alekhine Variation 1.d4 Nf6 2.c4 g6 3.f3Nimzovich Defense 1.e4 Nc6Nimzovich Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 Ne5Nimzovich Opening, Reti 1.Nf3 d5 2.b3Nimzovich Variation, Bogo-Indian 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Bd2 Qe7Nimzovich Variation, Dutch 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 b6Nimzovich Variation, English 1.c4 e5 2.Nf3Nimzovich Variation, French 1.e4 e6 2.d4 d5 3.e5 c5 4.Nf3Nimzovich Variation, KGD; Anderssen Attack 1.e4 e5 2.f4 d5 3.exd5 e4 4.Bb5+Nimzovich Variation, Knight's Tour Variation, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Nd2Nimzovich Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6Nimzovich Variation, Sicilian; Nimzo-American Variation 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 d5Nimzovich Variation, Torre Attack 1.d4 Nf6 2.Nf3 e6 3.Bg5 h6Nimzovich; Bronstein-Larsen, Caro; B16 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ gxf6Nimzovich; Rubinstein Var, Sicilian; B29 1.e4 c5 2.Nf3 Nf6Nimzovich; Tarrasch Var, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Nc3Nimzovich-Flohr Variation, English 1.c4 e5 2.Nf3 e4Nimzovich-Marshall Variation, KGD 1.e4 e5 2.f4 d5 3.exd5 c6Noa Gambit, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bc4 Nxe4 5.Bxf7+Noa Variation, Nimzo-Indian; E34 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5Noah's Ark Trap, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.d4 b5 6.Bb3 exd4 7.Nxd4 Nxd4 8.Qxd4 c5 9.Qd5 Be6 10.Qc6+ Bd7Noch Gambit, Alekhine 1.e4 Nf6 2.Nc3 d5 3.exd5Normal Defesne, Sameisch Variation, KID; E81 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-ONormal Line, Albin Countergambit, QGD 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3Normal Position, 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 Bb6Normal System, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.d4Normal Variation, Budapest; A52 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4Normal Variation, Dutch 1.d4 f5 2.c4 Nf6Normal Variation, French; C10 1.e4 e6 2.d4 d5 3.Nc3Normal Variation, Indian Game; A50 1.d4 Nf6 2.c4Normal Variation, KID 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 Ne7Normal Variation, KID; E70 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4Normal Variation, Nimzo-Indian; E46 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-ONormal Variation, Old Indian; A55 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 Nbd7 5.e4Normal Variation, Ruy Lopez; C78 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-ONormal Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7Normal Variation, Symmetrical English; A34 1.c4 c5 2.Nc3Norwalde (Norwalder) Variation, KGD 1.e4 e5 2.f4 Qf6Norwalder Gambit 1.e4 e5 2.c3 d5 3.Qh5 Bd6Norwegian Defense 1.e4 g6 2.d4 Nf6Noteboom Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4Nottingham Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.Nb3Novikov Gambit, QGA 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Nd2Novosibirsk Variation, Dunst 1.Nc3 c5 2.d4 cxd4 3.Qxd4 Nc6 4.Qh4Nuremberg Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f6Nyholm Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d4 exd4 5.O-OOberndorfer Gambit; Reti 1.Nf3 g5
O'Kelly Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c6 O'Kelly Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3 b6O'Kelly Variation, Sicilian; B28 1.e4 c5 2.Nf3 a6Olafsson Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 b6 9.Qe2 Bb7 10.Rd1 Qc8Old Benoni 1.d4 c5 2.d5 d6Old Indian Attack 1.Nf3 d5 2.d3Old Indian Defense; Chigorin Indian Defense; A53 1.d4 Nf6 2.c4 d6Old Line, Falkbeer Countergambit, KGD 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Qe2Old Meran Variation, QGD 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.O-OOld Sicilian 1.e4 c5 2.Nf3 Nc6Old Variation, QGA 1.d4 d5 2.c4 dxc4 3.e3Old Variation, Semi-Slav 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.e5Old Zurich Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6 5.Nf3 d6 6.a3Olland (Dutch) Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bc1Omaha Gambit, Vienna 1.e4 e5 2.Nc3 d6 3.f4Omega Gambit 1.d4 Nf6 2.e4Open Defense, Catalan; E04 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3Open System Tarrasch French; C07 1.e4 e6 2.d4 d5 3.Nd2 c5Open Variation, Two Knights Defense; C56 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4Opocensky Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd2Opocensky Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.Bd2Opocensky Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.Nc3 Ne4 7.Bd2Opocensky Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5Opocensky Variation, Sicilian; B92 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2Original Defesne, Neo-Grunfeld; D78 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6Orsini Gambit, KGA 1.e4 e5 2.f4 exf4 3.b3Orthodox Variation, KID; E85 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5Orthodox Variation, KID; E91 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2Orthodox Variation, QGD; D60 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7Orthoschapp Variation, French 1.e4 e6 2.c4 d5 3.cxd5 exd5 4.Qb3Oshima Defense 1.d4 Nf6 2.g4 e5Outflank Variation, Polish 1.b4 c6 Owen's Defense; Greek Defense 1.e4 b6Oxford Gambit, Four Kngihts 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.d5 Nd4Oxford Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.d3Ozol Variation, Dutch 1.d4 f5 2.c4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Bg5Pachman Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3 dxc4 7.Bxc4 Nbd7 8.Ng5Paleface Attack 1.d4 Nf6 2.f3Panno Formation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 a6Panno System 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.O-O Nc6 7.d5 Na5Panno Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O a6 8.h3 Rb8Panno Variation, KID; E63 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O a6Panov Attack, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Nf3 cxd4 6.exd4 d5Panov Transfer, Center Counter 1.e4 d5 2.exd5 Nf6 3.c4 c6Panov Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.h3Panov Variation, Sicilian Dragon 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.g4Panov; Opatijav; Byrne Variation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bg5Panov-Botvinnik; Gunderam Attack 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4Panteldakis Countergambit, KGD 1.e4 e5 2.f4 f5Papa-Ticulat Gambit, French 1.e4 e6 2.b3 d5 3.Bb2Paris Gambit, KGA 1.e4 e5 2.f4 exf4 3.Ne2Paris Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3Parma Defense, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O Bg4
Paschman Wing Gambit 1.e4 e5 2.Nf3 Nc6 3.b4Paschmann Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.Ne2 Nxe4 4.Nec3Paschmann Gambit, Larsen 1.b3 e5 2.Bb2 Nc6 3.f4Paulsen Attack Variation, Center 1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qe3 Paulsen Attack, French 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3Paulsen Attack, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.Nf3Paulsen Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nc4Paulsen Attack, Philidor 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Nxd4 d5 5.exd5Paulsen Attack, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Bb5Paulsen Attack, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Qf3Paulsen Counter-Gambit 1.e4 e5 2.Nf3 d5 3.exd5 e4Paulsen Defense Deferred, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bg7Paulsen Defense, KGA 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.Bd2Paulsen Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Bg7Paulsen Defense, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d6Paulsen Formation, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6Paulsen Line, Sicilian 1.e4 c5 2.Nf3 a6 3.c4 e6Paulsen Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.Bxc6Paulsen Variation, Cozio Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 4.Nc3 g6Paulsen Variation, Evans 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 Ne7Paulsen Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4 4.Nxd4 exd4 5.O-O Ne7Paulsen Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nf5Paulsen Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4Paulsen Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.O-O Qc7 8.f4 Nc6Paulsen Variation, Vienna 1.e4 e5 2.Nc3 Nc6 3.g3Paulsen; Anderssen C-A, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.O-O d6 6.c3 Bg4Paulsen; Kan Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6Pawn Push Variation 1.d4 Nf6 2.d5Pawn Return Variation, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.b6Pawn Storm Variation, Benoni; A66 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4Pawn Thrust Attack, Bird 1.f4 f5 2.d4 d5Pawn Thrust, Benoni; A44 1.d4 c5 2.d5 e5Pelikan Variation, French 1.e4 e6 2.Nc3 d5 3.f4Pelikan Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6Penguin Variation, Reti 1.Nf3 d5 2.c4 d4 3.Rg1Penrose Variation, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Bd3Perenyi Gambit, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.g4 e5 8.Nf5 g6 9.g5Perreux Variation, Two Knights Defense 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.Ng5Perrin Variation 1.d4 e6 2.c4 b6 3.e4 Bb7 4.Bd3 Nc6Perseus Gambit, French 1.e4 e6 2.d4 d5 3.Nf3Peters Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Ne5Petroff Defense; Russian Defense; C42 1.e4 e5 2.Nf3 Nf6Petrosian Gambit 1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e3 b6 5.d5Petrosian System, Grunfeld; D91 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5Petrosian System; Czech Benoni Defense 1.d4 Nf6 2.c4 c5 3.d5 e5Petrosian Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 Qd7Petrosian Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5Petrosian Variation, QGD 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 dxc4Petrosian Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3Petrov's Defense, KGD 1.e4 e5 2.f4 Nf6Pfrang Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e6 5.fxe4 Bb4 6.Bd3 Bxc3+ 7.bxc3 Nxe4 8.Be3Philidor Counter Attack 1.e4 e5 2.Nf3 d6 3.d4 f5Philidor Countergambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.d4 f5
Philidor Defense; C41 1.e4 e5 2.Nf3 d6Philidor Gambit 1.e4 e5 2.d4 d6 3.dxe5 Bd7Philidor Gambit 1.e4 e5 2.Nf3 d6 3.d4 Bd7Philidor Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4Philidor Gambit, Pirc 1.e4 d6 2.d4 e5 3.dxe5 Bd7Philidor Variation, Bishop 1.e4 e5 2.Bc4 Bc5 3.c3Pickering (Goldsmith) Defense 1.e4 h5Picklepuss Defense 1.e4 h5 2.d4 Nf6Pickler Gambit, KGD 1.e4 e5 2.f4 d5 3.exd5 c6 4.dxc6 Bc5Pierce Defense, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4Pierce Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.d4Pietrowsky Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Nc6Pillsbury Attack, QGD 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.Ne5Pillsbury Defense; A41; Rat Defense 1.d4 d6 Pillsbury Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Bg5 Ne7Pillsbury Variation, QGD 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.Bd3Pillsbury Variation, Ruy Lopez 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.b3Pillsbury Variation, Semi-Tarrasch 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.Bg5Pilnik Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d3Pin Defense, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bg4Pin Defense, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Bb4Pin Variation; Sicilian CounterAttack 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4Pinova Gambit 1.e4 e6 2.b4 Bxb4 3.e5Pirc Connection, Nimzovich Defense 1.e4 Nc6 2.d4 g6Pirc Defense 1.e4 d6 2.d4 Nf6Pirc Variation, Nimzo-Indian; E39 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 O-OPirc Variation, QGD 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 b4Pirc; Robatsch; Modern; King Pawn Fianchetto; B06 1.e4 g6Pirc; Ufimtsev; Antal Defense 1.e4 d6 2.d4 Nf6 3.Nc3 g6Podebrady Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nb3Pohlmann Variation, BDG 1.d4 d5 2.e4 dxe4 3.f3 f5Poisoned Pawn Accepted, Najdorf Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2 Qxb2Poisoned Pawn Variation, French Winawer 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Qg4Poisoned Pawn Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Bc4 fxe4 4.Nxe5 Qg5 5.d4 Qxg2Poisoned Pawn Variation, Najdorf Sicilian; B97 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6Poisoned Pawn Variation, QP 1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Qb6 5.Nc3Poisoned Pawn Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2Poisoned Pawn Variation, Trompowsky 1.d4 Nf6 2.Bg5 c5 3.d5 Qb6 4.Nc3Polerio Defense, Two Knights; C58 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5Polerio-Svedenborg Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Bc4 fxe4 4.Nxe5 d5 Polgar Variation, Neo-Grunfeld 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O Nc6Poli Gambit 1.d4 e6 2.c4 b6 3.e4 Bb7 4.f3 f5 5.exf5 Nh6Polish Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.f3 Bf5 5.Bg5Polish Defense 1.d4 b5 Polish Defense 1.d4 Nf6 2.Nf3 b5Polish G; Dalesio G; Pirc-Lisitsin G 1.Nf3 f5 2.e4 fxe4 3.Ng5Polish Gambit, Anderssen's Opening 1.a3 a5 2.b4Polish Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3Polish Gambit, Sicilian 1.e4 c5 2.Nf3 b5Polish Spike 1.b4 Nf6 2.Bb2 g6 3.g4Polish Variation 1.e4 g6 2.d4 Bg7 3.c4 c5 4.Nf3 Qb6Polish Variation, St George Defense 1.e4 a6 2.d4 b5 3.Nf3 Bb7 4.Bd3 e6Polish; Orangutan; Sokolsky; Hunt 1.b4
Pollock Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Qg4Polluck Gambit, Vienna 1.e4 e5 2.Nc3 Nf6 3.g3 Bc5 4.Bg2 Nc6 5.Nge2 d5 6.exd5Polovodin Gambit, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 d5 6.cxd5 Nxd5 7.e4Polugaevsky Gambit, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.d5 exd5 8.Nh4Polugaevsky Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Bc5Polugaevsky; Accelerated Najdorf 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 b5Pomar System, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.g3 O-O 6.Bg2 e5 7.Nge2Pomar Variation, KID 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nge2Ponomariov Gambit, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Ndb5 Qb8 7.Be3 a6 8.Bb6Ponziani Center Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.d4 Ponziani Counter-Gambit 1.e4 e5 2.Nf3 Nc6 3.c3 f5Ponziani; Staunton; English Knights 1.e4 e5 2.Nf3 Nc6 3.c3 Ponziani-Steintz Gambit, Two Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Nxe4Porcupine Variation, English 1.c4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4Portisch Gambit, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5 5.g4Portland Attack, Sicilian 1.e4 c5 2.Nc3 Nc6 3.d3 g6 4.g4Portuguese Gambit, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.f3 Bf5 5.Bb5+ Nbd7Portuguese Opening 1.e4 e5 2.Bb5Portuguese Variation, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Bg4Positional Variation, Exchange Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5Potter Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3Pozarek Gambit 1.d4 Nc6 2.c4 e5 3.dxe5 Nxe5 4.Nc3 Nxc4Prague Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6Pretzel Gambit, Dutch 1.d4 f5 2.Qd3 Nf6 3.g4Prianishenmo Gambit, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 c5 4.d5 Nf6 5.Nc3 e6 6.e4 exd5 7.e5Prickly Pawn Pass System, English 1.c4 e5 2.Nc3 Nf6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.e4 O-O 7.Nge2 c6 8.O-O a6Primitive Pillsbury Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.Nf3 cxd4 6.Qxd4Prins Attack, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 Bf5 4.b4Prins Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Na6Prokofiev Gambit, Bird 1.f4 d5 2.e4 dxe4 3.d3Provincial Opening, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.a3 d6 5.h3Prussian Game; Knight Attack, Two Knights; C57 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5Przepiorka Variation; A49 1.d4 Nf6 2.Nf3 g6 3.g3Pseudo-Austrian Attack 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4Pseudo-Benko Gambit 1.d4 Nf6 2.Nf3 c5 3.d5 b5Pseudo-Catalan 1.d4 d5 2.Nf3 Nf6 3.g3Pseudo-Chigorin, QGD 1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Nf3 Nc6Pseudo-Diemer Gambit, Dunst 1.Nc3 d5 2.e4 dxe4 3.f3 exf3 4.Qxf3Pseudo-King's Indian Variation; A48 1.d4 Nf6 2.Nf3 g6Pseudo-Marshall Var, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 Bb7 8.c3 d5 9.exd5 Nxd5 10.Nxe5 Nxe5Pseudo-Meran; Semi-Slav, QGD 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6Pseudo-Saemisch 1.d4 g6 2.c4 Bg7 3.e4 d6 4.Be3 Nf6 5.f3Pseudo-Saemisch, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.f3Pseudo-Slav, QGD 1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Nf3 c6Pseudo-Spanish Variation 1.e4 Nc6 2.Bb5Pseudo-Tarrasch Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.cxd5 Pseudo-Tarrasch, QGD 1.d4 d5 2.c4 e6 3.Nf3 c5Pterodactyl Variation, Modern 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 c5 5.Nf3 Qa5Pterodactyl, Pirc 1.e4 g6 2.d4 Bg7 3.Nc3 c5Push Variation, Smith-Morra Gambit, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 d3Pyrenees Gambit 1.d4 Nf6 2.c4 b5Quaade; Taylor Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Nc3Queen Attack, Baltic Defens, QGD 1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Qb3
Queen Fianchetto Variation, Sicilian 1.e4 c5 2.b3 b6Queen Fianchetto, Queen Pawn Game 1.d4 b6Queen Pawn Fianchetto 1.d4 g6Queen Pawn Game; Close Opening; D00 1.d4 d5Queen Pawn Opening; A40 1.d4Queen's Gambit Accepted Deferred 1.d4 d5 2.Nf3 Nf6 3.c4 dxc4Queen's Gambit Accepted; D20 1.d4 d5 2.c4 dxc4 Queen's Gambit Reversed; Krause Variation 1.d4 d5 2.Nf3 c5Queen's Gambit; Aleppo Gambit; D06 1.d4 d5 2.c4Queen's Indian Defense; E12 1.d4 Nf6 2.c4 e6 3.Nf3 b6Queen's Indian Defense; Saemisch-Indian 1.d4 Nf6 2.c4 b6Queen's Indian Formation, English 1.c4 Nf6 2.Nc3 e6 3.Nf3 b6Queen's Knight Defense, KGD 1.e4 e5 2.f4 Nc6Queen's Knight Variation, Dutch 1.d4 f5 2.c4 Nf6 3.Nc3Queen's Knight Variation, QGD; D31 1.d4 d5 2.c4 e6 3.Nc3Queen's Knight, French 1.e4 e6 2.Nc3Queen's Pawn Counter-Gambit; Elephant Gambit 1.e4 e5 2.Nf3 d5Quelle Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 Bc5 4.fxe5 d6Quiet Line, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nd2Quiet Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3Quiet Line, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.b3Quiet System, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.d3Quiet System, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2Quiet Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.Nbd2Quiet Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3Quinteros Variation, Sicilian 1.e4 c5 2.Nf3 Qc7Radisch Gambit 1.e4 e5 2.d3 Nf6 3.f4 Bc5Ragozin Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 d5Ragozin Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 Nc6 5.Nf3 O-O 6.Bd3 d5 7.O-O dxc4Ragozin Variation, Nimzo-Indian; E51 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5Ragozin Variation, QGD; D38 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4Randspringer Variation 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 f5Ranken Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 a6 5.Bxc6Raphael Variation, Dutch 1.d4 f5 2.Nc3Raptor Variation, Trompowsky 1.d4 Nf6 2.Bg5 Ne4 3.h4Rasa-Studier Gambit, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Be3Rasa-Studier Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.Be3Rasmussen Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nge2Rauzer Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Qb3Rauzer Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Nc6 13.dxe5 dxe5 14.a4Rauzer Variation, Sicilian; B63 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2Regan Variation 1.g3 d5 2.Bg2 e5 3.d4Reifir-Spielmann Line, Caro-Kann 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qb6Rellstab Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.dxe5 Nxe4 5.Qd5Requena Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nc3 Qh4+Reshevsky Gambit, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Rc1 c5 7.dxc5 Qa5Reshevsky Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2Reshevsky Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nge2Reshevsky Variation, QGD; D36 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 c6 6.Qc2Reti (Charousek) Variation, KGD 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Reti (Horwitz) Variation, French 1.e4 e6 2.b3Reti Gambit Accepted 1.Nf3 d5 2.c4 dxc4Reti Polonaise 1.Nf3 d5 2.c4 d4 3.b4
Reti System, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.g3Reti Variation, QGD 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.Na4Reti Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4Reti; Landstrasser G; Wolf G; A09 1.Nf3 d5 2.c4 Reti; Zukertort; A04 1.Nf3 Reti-Spielmann Attack, French 1.e4 e6 2.g3Retreat Line, Mindeno Variation, Caro-Kann 1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 4.h3 Bh5Retreat Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nc8Retreat Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Nf3Retreat; Brooklyn Variation, Alekhine 1.e4 Nf6 2.e5 Ng8Reuter Gambit, French 1.e4 e6 2.f4 d5 3.Nf3 dxe4 4.Ng5Reversed Alekhine 1.g3 e5 2.Nf3Reversed Chigorin Defense 1.d4 Nf6 2.Nc3 c5Reversed Closed Sicilian, English; A25 1.c4 e5 2.Nc3 Nc6Reversed Dragon, English 1.c4 e5 2.Nc3 Nf6 3.g3 d5Reversed Mexican Defense, Reti 1.Nf3 d5 2.Nc3Reversed Nimzovich 1.Nc3 e5 Reversed Philidor, French 1.e4 e6 2.d3 d5 3.Nd2 Nf6 4.Ngf3 Nc6 5.Be2Reversed Rat 1.d3 e5Reversed Sicilian, English; A21 1.c4 e5 2.Nc3Reversed Spanish, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Bb4Reynolds Variation, QGD; D48 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6Reynolds Variation, Semi-Slav 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 d5Rice Gambit Accepted, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.O-O Bxe5Rice Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.O-ORichardson Attack, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.O-O Nf6 7.d4 O-O 8.Nxe5Richter Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 Nb8 5.f3Richter Variation, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 g6Richter Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6 6.d4Richter Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.d5Richter Variation, Veresov 1.d4 d5 2.Nc3 Nf6 3.Bg5 Bf5 4.f3Richter-Rauzer Variation, Sicilian; B60 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5Richter-Veresov Opening; D01 1.d4 d5 2.Nc3 Nf6 3.Bg5Riemann Defense, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.f4 Nc6Riga Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 exd4Ringelbach Gambit, Larsen 1.b3 e5 2.Bb2 f5 3.e4Rio de Janeiro Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7Rio Gambit Accepted, Ruy Lopez; C67 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4Ritter Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 b6 Riumin Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 Be7Rivadavia Gambit, Sicilian 1.e4 c5 2.d4 cxd4 3.c3Riviere Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Nxg4 d5Robatsch Line, Sicilian 1.e4 c5 2.Nf3 a6 3.c4 d6Romanishin Gambit, English 1.c4 e6 2.Nf3 Nf6 3.g3 a6 4.Bg2 b5Romanishin Variation, English 1.c4 Nf6 2.Nf3 e6 3.g3 a6Romanishin Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 Bxc3Romanishin Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.g3 O-O 6.Bg2Romanishin Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Nf3 Qf5Romanishin Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7 11.Nbd2 Bb7 12.Bc2 Re8 13.Nf1 Bf8 14.Bg5Romanishin Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3 Bb4+Romanovsky Gambit, Nimzo-Indian; E23 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6Romanovsky Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.cxd5 Nxd5 8.dxc5 f5Romanovsky Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6 7.c3 O-O 8.d4 Bd7 9.Nbd2 exd4 10.cxd4 Nb4
Romanovsky Variation, Ruy Lopez Exchange 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6 5.Nc3 f6 6.d3Romford Counter-Gambit, Grob 1.g4 d5 2.Bg2 Bxg4 3.c4 d4Romi Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 Bb4Roscher Gambit, Pirc 1.e4 d6 2.d4 Nf6 3.Nf3Rosen Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.d4Rosenthal Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 e6Rosenthal Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 a6Rosenthal Variation, Three Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 g6 4.d4 exd4 5.Nd5Rosenthal; Stockwhip Var, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Qe7Rosentreter Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d4Rosentreter Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4Rosentreter-Testa Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 g4 5.Bxf4Ross Gambit, Center 1.e4 e5 2.d4 exd4 3.Bd3Rossolimo (Nezmetdinov) Variation, Sicilian; B30 1.e4 c5 2.Nf3 Nc6 3.Bb5Rossolimo Variation 1.d4 g6 2.c4 Bg7 3.e4 d6 4.Nf3 Bg4Rossolimo Variation, Modern Defense 1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.c4 Bg4Rotary-Albany Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 b6Rotterdam Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Qb3 Rousseau Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 f5Ruban Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 Rb8Rubinstein Attack, Colle 1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3 c5 5.b3Rubinstein Attack, Orthodox Defense, QGD; D64 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Qc2Rubinstein Countergambit, KGD 1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.c3 f5Rubinstein Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Nd4Rubinstein Variation, Blumenfeld 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.e4Rubinstein Variation, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Bf4Rubinstein Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.exd5 cxd3 4.Bd3 Nc6 5.c3 Nf6 6.Bf4Rubinstein Variation, Dutch 1.d4 f5 2.c4 e6 3.Nc3Rubinstein Variation, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4Rubinstein Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Qd2Rubinstein Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.d4Rubinstein Variation, Nimzo-Indian; E40 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3Rubinstein Variation, Nimzo-Indian; E42 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2Rubinstein Variation, Orthodox Defense, QGD; D61 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Qc2Rubinstein Variation, QGA 1.d4 d5 2.c4 dxc4 3.e4 c5Rubinstein Variation, QGA; D27 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6Rubinstein Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6Rubinstein Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 6.d5 exd5 7.Nh4Rubinstein Variation, Symmetrical English 1.c4 c5 2.Nc3 Nf6 3.g3 d5 4.cxd5 Nxd5 5.Bg2 Nc7Rubinstein; anti-Meran 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Ne5Rubinstein; Normal Position, QGD 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-ORuisdonk Gambit, French 1.e4 e6 2.d4 d5 3.e5 c5 4.Nf3 cxd4 5.Bd3Russian Defense, Ruy Lopez; C79; Lasker Defense 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d6Russian Gambit, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.e4Russian Three Knights Var, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nc3Russian Variation, Grunfeld; D96 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3Ruy Lopez; Spanish Opening; C60 1.e4 e5 2.Nf3 Nc6 3.Bb5Rydel-Bloodgood Gambit 1.Nf3 f5 2.e4 exf4 3.Ne5Ryder Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3Saduleto Variation, QGA; Central Variation, QGA 1.d4 d5 2.c4 dxc4 3.e4Saemisch Attack, Alekhine 1.e4 Nf6 2.e5 Nd5 3.Nc3Saemisch Deferred, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.a3Saemisch Variation, KID; E80 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3
Saemisch Variation, Nimzo-Indian; E24 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3Saemisch Variation, Nimzo-Indian; E26 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3Saemisch Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Nf3 Nbd7 6.Bf4Saemisch Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5Salvio Countergambit, QGD 1.d4 d5 2.c4 c5 3.dxc5 d4Salvio Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 San Francisco Gambit, Sicilian 1.e4 c5 2.Nf3 Nc6 3.Bb5 Na5 4.b4San Jorge Variation 1.e4 a6 2.d4 b5 3.Nf3 Bb7 4.Bd3 d6 5.O-O g6 6.c3 Bg7San Jorge Variation 1.e4 a6 2.d4 e6San Remo Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Ne4 7.Qc2 Nc6 8.e3 e5San Remo Variation, Nimzo-Indian; Stahlberg Variation 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxc5San Sebastian Variation, QGD 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+Sanky-Georg Gambit, St George 1.e4 a6 2.d4 e6 3.c4 b5Santa Maria Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nf6Santasiere Wing Gambit, Sicilian 1.e4 c5 2.b4 cxb4 3.c4Santasiere's Folly, Reti 1.Nf3 d5 2.b4Santassiere Variation, KID 1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.b4Saragossa; Hempel's Opening 1.c3Sarratt Attack 1.d4 d5 2.Bf4Sarratt Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6Sawyer's Gambit, Ruy Lopez; Spanish Countergambit 1.e4 e5 2.Nf3 Nc6 3.Bb5 d5Scandanavian Formation, Smith-Morra, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 d5Scandanavian Variation, Alekhine 1.e4 Nf6 2.Nc3 d5Scandanavian Variation, Nimzovich Defense 1.e4 Nc6 2.d4 d5Scandinavian Variation, KGA; Modern Defense, KGA; C36 1.e4 e5 2.f4 exf4 3.Nf3 d5Schallop Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 Nf6Schallopp Defense, Slav; D12 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5Schara-Hennig; Duisburg Gambit, QGD 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4Scheveingen Variation, Sicilian; B80 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6Scheveningen Formation, Smith-Morra Accepted 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6Scheveningen Variation, Sicilian; B83 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 Schiffler-Sokolsky; Tartakower Gambit 1.b4 e5 2.Bb2 f6 3.e4 Bxb4Schiller-Pytel Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 c6Schlechter Defense, Center 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 d5Schlechter Defense, Nimzo-Indian; E52 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 b6Schlechter Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.a4 Nxd4Schlechter Variation, French 1.e4 e6 2.d4 d5 3.Bd3Schlechter Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6Schlechter Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 c6Schlechter Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.Nc3Schlechter Variation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.h3Schlechter Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2 b5 7.Bb3 O-O 8.c3 d5Schlechter Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 g6Schlechter Variation, Three Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Bb4 4.Nd5 Nf6Schlenker Defense, Benoni 1.d4 c5 2.dxc5 Na6Schliemann Defense Deferred, Ruy 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 f5Schliemann; Jaenisch Var, Ruy Lopez; C63 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5Schmid Gambit, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nxd4 Nxe4Schmid Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Nb6Schmid Variation, Benoni 1.d4 c5 2.d5 d6 3.Nc3 g6Schmidt Attack, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 f5 4.d4 d6 5.d5Schmidt Var; Scotch Four Knights 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nc3Schnepper Gambit 1.d4 Nf6 2.Nf3 b6 3.c3 e5
Schoenemann Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.d4Schofman Variation, Sicilian 1.e4 c5 2.Nc3 Nc6 3.f4 g6 4.Nf3 Bg7 5.Bc4 e6 6.f5Schubert Variation, KGD 1.e4 e5 2.f4 Qf6 3.Nc3 Qxf4 4.d4Schuhler Gambit, Polish 1.b4 c6 2.Bb2 a5 3.b5 cxb5 4.e4Schulder Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 d6 4.b4Schulen Defense, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O b5Schultz Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 h6 6.d4 d6 7.Qd3Schulz Gambit, English 1.c4 d5 2.cxd5 Nf6Schurig Gambit, KGA 1.e4 e5 2.f4 exf4 3.Bb5Schuttler Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Nbd7Schwarz's Line, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2 Ne7 5.Nb1Scippler Gambit, Center 1.e4 e5 2.d4 exd4 3.Nf3 Bc5 4.c3 dxc3 5.Bc4Scorpion-Horus Gambit, Caro-Kann 1.e4 c6 2.Nc3 d5 3.d3 dxe4 4.Bg5Scotch Gambit 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4Scotch Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-OScotch Game 1.e4 e5 2.Nf3 Nc6 3.d4Seirawan Attack 1.d4 Nf6 2.c4 e6 3.Bg5Seirawan Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 8.e5 Bh7 9.Bd3 Bxd3 10.Qxd3Semi-Averbakh System, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Be3Semi-Leningrad Variation, Dutch 1.d4 f5 2.g3 Nf6 3.Bg2 g6Semi-Slav Defense 1.d4 d5 2.c4 e6 3.Nc3 c6 Semi-Slav Defense Accepted; D44 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4Semi-Tarrasch Variation, QGD; D40 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5Semmering Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.Nbd2 Nbd7 6.Bd3 c5Senechaud Counter-Gambit, KGD 1.e4 e5 2.f4 Bc5 3.Nf3 g5Senechaud Gambit, Latvian 1.e4 e5 2.Nf3 f5 3.b4Seneschaud Gambit, Dutch 1.d4 f5 2.Bf4 e6 3.g4Seneschaud Variation, Dutch 1.d4 e6 2.Bf4 f5 3.g4Seville Variation, Grunfeld 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.Be3Shabalov Attack, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.g4Shannon Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Bb7 7.Ng5 d5Shaposhnikov Gambit, French 1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 Nf6Sharp Line, Wiesbaden Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 e6 7.f3 Bb4 8.e4Sharp Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 Nb6Shaviliuk Gambit, QP 1.d4 d5 2.Nc3 e5Sherbakov Attack, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2 cxd4 6.exd4 O-O 7.c5Sherbakov Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 Be7 8.Bb3 O-O 9.O-O Na5 10.f4 b6Sherzer Variation, Sicilian 1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.d4 e6 5.Nf3 Nc6Shilling (Kostic) Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4Shirazi Shove 1.c4 Nf6 2.g3 h5Shocron Gambit, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5 b5Short Spike, Grob 1.g4 d5 2.Bg2 c6 3.h3Short Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3Showalter Variation, QGA; D24 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3Shropshire Defense 1.d4 d5 2.Nc3 h5 Siberian Attack 1.d4 d5 2.Qd3 Nc6 3.Nc3Sicilian Center Game 1.e4 c5 2.d4 cxd4Sicilian Defense; B20 1.e4 c5 Sicilian Fred 1.e4 c5 2.Nf3 g6 3.d4 f5Siesta Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 f5Silberschmidt Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nh6Simagin (Byrne) Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Nc6Simagin Improved Variation, Grunfeld 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
Simagin Line, Najdorf Sicilian 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.Qe2Simagin Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O Bg4Simagin Variation, Grunfeld 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 9.h4 Ba6Simagin Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O Bg4Simagin Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 d5 6.a3 Bd6Simagin Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nge2 d5 6.a3 Bd6Simagin Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4 Nbd7 11.Nh4Six Pawns Attack, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 c5 6.d5 O-O 7.Be2 e6 8.dxe6 fxe6 9.g4 Nc6 10.h4Six Pawns Attack, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6Skipworth Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Re1 d5Slav Bishop's Game 1.d4 d5 2.c4 c6 3.Nf3 Bf5Slav Defense; Czech Defense, QGD; D10 1.d4 d5 2.c4 c6Slav Fianchetto 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Nf6 5.Nc3 g6Slav Gambit, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 b5Slav Pawn Game 1.d4 d5 2.c4 c6 3.e3Slav Stonewall, Dutch 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5Slow Sicilian 1.e4 c5 2.Be2Slow Variation, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.O-OSmall Center Defense 1.e4 d6 2.d4 e6Small Center Variation, Pirc 1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.Nc3 e6Smith Gambit, Owen Defense 1.e4 b6 2.d4 Bb7 3.Nf3Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3Smith-Morra Line, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.c3Smith-Morra; Fleissig Gambit, Sic 1.e4 c5 2.d4 cxd4 3.c3Smyslov Defense, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nxc3Smyslov Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Ng5 e6 7.Qe2 Nb6Smyslov Variation, Classical Defense, QGA 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 Bd6Smyslov Variation, English 1.c4 e5 2.Nc3 d6 3.Nf3 Bg4Smyslov Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6 7.O-O Bg4Smyslov Variation, Grunfeld; D98 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4Smyslov Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Bg5Smyslov Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.Bg5Smyslov Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 Qe7Smyslov Variation, Nimzo-Indian 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 Qe7Smyslov Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 g6Smyslov Variation, Ruy Lopez; C93 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 h6Smyslov Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Na6Snagkeouss Defense 1.e4 a5 2.d4 Nc6Snail Variation, Benoni 1.d4 c5 2.d5 Na6Snake Variation, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 Bd6Sneiders Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Qh5Snyder Variation, Sicilian 1.e4 c5 2.b3Soerensen Defense, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 g5Soerensen Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Nc3Sokolov's Line, KID 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 Nh5 10.Re1Sokolsky Variation, Catalan 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 8.Nbd2 b6 9.b3 a5 10.Bb2 Ba6Sokolsky Variation, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.Bg5Sokolsky Variation, Grunfeld 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.d5Sokolsky Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.dxe5 Nxe4 5.Nbd2Soller Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Bf5 4.f3 Nf6 5.Bc4Soller Gambit Deferred 1.d4 e5 2.dxe5 Nc6 3.Nf3 f6Soller; Lemberger Var, BDG; Diemer Attack 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Be3Soller; Purchas Gambit 1.d4 e5 2.dxe5 f6
Soller; Vienna Var, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.Bc4Soller-Zilbermints Gambit, KGD 1.e4 e5 2.f4 f6 3.fxe5 Nc6Somov Gambit, QGA 1.d4 d5 2.c4 dxc4 3.e4 e5 4.Bxc4Sorensen Defense, Center 1.e4 e5 2.d4 exd4 3.c3 d5Sorensen Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Ne5Sosonko Variation, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.a4Sosonko Variation, Sicilian Dragon 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 Nd7Soultanbeieff Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 e6Soviet Youth Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Nd4 5.O-OSozin Formation, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 d6 7.O-O a6 8.Qe2 b5Sozin Variation, QGD 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 Nxe5Sozin; Velimirovic Attack, Sicilian; B57 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4Spanish Benoni, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.d5Spanish Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 a6Spanish Four Knights Game; C48 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5Spanish Variation, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Bb5Spanish Wing Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.b4Spassky Gambit, Polish Defense 1.d4 b5 2.e4 Bb7 3.Bxb5Spassky System, QID; E14 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3Spassky Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O Bf5Spassky Variation, Grunfeld; D87 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 O-O 8.Ne2 c5Spassky Variation, Tarrasch 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 cxd4 10.Nxd4Sperling Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.d5Spielmann Attack, Bishop 1.e4 e5 2.Bc4 Nf6 3.d3 Bc5 4.Nc3Spielmann Defense, Symmetrical English; A32 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6Spielmann Gambit, Dutch 1.d4 f5 2.Nc3 Nf6 3.g4Spielmann Variation, Alekhine 1.e4 Nf6 2.Nc3 d5 3.e5 Nfd7 4.e6Spielmann Variation, Blumenfeld 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.Bg5 exd5 6.cxd5 h6Spielmann Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 O-OSpielmann Variation, Nimzo-Indian; E22 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3Spielmann Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Nde2Spielmann-Indian 1.d4 Nf6 2.Nf3 c5Spike Deferred 1.g4 g6 2.d3Spike Deferred; Myers Spike Attack 1.d3 g6 2.g4Spike Variation, Larsen 1.b3 Nf6 2.Bb2 g6 3.g4Spike, Grob 1.g4 d5 2.Bg2 c6 3.g5St George; Birmingham; Baker 1.e4 a6 St George's Gambit 1.d4 a6 2.c4 b5 3.e4 e6 4.cxb5 axb5St Petersburg Variation, Ruy Lopez 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.Nbd2St. George Defense, Dunst 1.Nc3 a6St. Petersburg Variation, Nimzo-Indian; E43 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6Stafford Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nc6Stahlberg Variation, Nimzo-Indian 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.g3Stahlberg Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxd2 8.Nxd2 O-O 9.O-O-OStahlberg Variation, QGD 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 axb5Stanley Variation, Vienna; C27 1.e4 e5 2.Nc3 Nf6 3.Bc4Staunton Defense; Benoni C-G; A43 1.d4 c5Staunton Gambit Accepted, Dutch 1.d4 f5 2.e4 fxe4Staunton Gambit, Dutch; A82 1.d4 f5 2.e4 Staunton Line, KGD; C32 1.e4 e5 2.f4 d5 3.exd5 e4Staunton Variation, Petroff 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 c6Staunton-Cochrane Variation, Sicilian 1.e4 c5 2.c4 Stein Attack, Caro-Kann 1.e4 c6 2.d3 d5 3.Nd2 g6 4.g3 Bg7 5.Bg2 e5 6.Ngf3 Ne7 7.O-O O-O 8.b4
Stein Attack, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.Qa4+Stein Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 a5Stein Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.f4Steiner Attack, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Bg5Steiner Line, Sicilian 1.e4 c5 2.Nf3 a6 3.c3 d6Steiner Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.b3Steiner Variation, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 4.Qc2Steiner Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 Bxc3+Steiner Variation, Nimzo-Indian; Romanishin Variation 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.g3Steiner Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.O-O Be7 6.dxe5Steiner Variation, Ruy Lopez 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 e4Steiner Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bg4Steinitz Attack, French 1.e4 e6 2.e5Steinitz Countergambit, Queen Pawn Game 1.d4 d5 2.Bf4 c5Steinitz Defense Deferred; Ruy Lopez; C71 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6Steinitz Defense, Ruy Lopez; C62 1.e4 e5 2.Nf3 Nc6 3.Bb5 d6Steinitz Defense, Three Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 g6Steinitz Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4Steinitz Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5Steinitz Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.f4Steinitz Variation, Petoff; C43 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.d4Steinitz Variation, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 f6Steinitz Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O cxd4Steinitz Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nc3Steinitz Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.d3Steinitz; Pulling Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4Steinitz; Tartakower, Lasker-Dunne Variation, Sicilian 1.e4 c5 2.g3Stockholm Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5Stockhom Variation, Englund Gambit 1.d4 e5 2.dxe5 Nc6 3.Nf3 Qe7 4.Qd5Stoltz Attack, Sicilian 1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.Nf3 Nc6 5.Bc4 Nb6 6.Bb3Stoltz Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2Stonewall Attack 1.d4 d5 2.e3 Nf6 3.Bd3 c5 4.c3Stonewall Attack, Queen Pawn Game 1.d4 d5 2.e3 Nf6 3.Bd3Stonewall Defense, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Ne4 6.Bd3 f5Stonewall Variation, Dutch 1.d4 f5 2.c4 e6 3.Nc3 Nf6 4.g3 c6 5.Bg2 d5 6.O-O Bd6Stone-Ware Defense, Evans Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bd6Strautins Gambit, Latvian 1.e4 e5 2.Nf3 f5 3.Bc4 b5Studier Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.O-O O-O 8.Qe1Studier-Rasa Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Be3Stummer Gambit 1.d4 Nf6 2.g4 Nxg4 3.e4 d6 4.Be2 Nf6 5.Nc3Sturm; Mujannah 1.f4 d5 2.c4Suchting Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.Bc4Suchting Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 Qb6Suetin Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.a3Suetin Variation, Ruy Lopez 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.a3Suhle Defense, Two Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Be2 h6Suttles Variation, Modern Defense 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3 c6Svenius Variation, French 1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nc3 Nf6 5.Bg5Svenonius Defense, Center 1.e4 e5 2.d4 exd4 3.c3 Ne7Svenonius Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 Bxc3 7.bxc3 d5Svenonius Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.exd5Svenonius Variation, KGD 1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.Nc3 Nf6 5.Bc4 Nc6 6.d3 Bg4Sveshnikov Variation, Sicilian 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
Sveshnikov-Jansa Attack, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 c6 5.h3Swiss (Retreat) Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Ba5Swiss Cheese Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 g6Swiss Gambit, Bird 1.f4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4Swiss Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bd3Swiss; Wagner Gambit 1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e4Symmetrical Defense, English; A30 1.c4 c5 Symmetrical Line, Slav; D14 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5Symmetrical Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6Symmetrical Variation, Larsen 1.b3 b6Symmetrical Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4 d5Symmetrical Variation, QP 1.d4 d5 2.Nf3 Nf6Symmetrical Variation, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7Symmetrical Variation, Tarrasch 1.d4 d5 2.c4 e6 3.Nc3 c5 4.e3 Nf6 5.Nf3 Nc6Szabo (Boleslavsky) Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 c6Szabo Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O e5Szen Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5Taimanov Formation, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Bc4 a6 6.Nf3 Ne7Taimanov Gambit, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.d5 exd5 8.Nd4Taimanov Line, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Nxd4 e5Taimanov Variation, Benoni; A67 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Bb5Taimanov Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7Taimanov Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 Nc6Taimanov Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be2 Nge7Taimanov; Bastrikov, Paulsen Variation, Sicilian; B44 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6Tal Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.e5 Ne4 5.Bb5Tal Gambit, Sicilian 1.e4 c5 2.f4 d5 3.exd5 Nf6Tal Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 Bf5 4.h4Tal Variation, Modern Variation, Benoni; A60 1.d4 Nf6 2.c4 c5 3.d5 e6Tal Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4 Nc6 7.Be3 Be7 8.Qf3Tamarkin Countergambit, Benoni 1.d4 c5 2.Nf3 cxd4 3.b4 e5Tarrasch (Alekhine) Gambit, Caro 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Bd3Tarrasch Defense, Catalan 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 c5 5.Nf3 Nc6Tarrasch Defense, QGD; D32 1.d4 d5 2.c4 e6 3.Nc3 c5Tarrasch Gambit, QGD 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.dxc5 d4 6.Na4 b5Tarrasch Trap, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Re1 O-OTarrasch Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Bd3Tarrasch Variation, French; C03 1.e4 e6 2.d4 d5 3.Nd2Tarrasch Variation, Petroff 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 Bg4Tarrasch; Open Variation, Ruy Lopez; C80 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4Tartakower Attack, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.Qb3Tartakower Defense, QGD 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 c5Tartakower Gambit, QGD 1.d4 d5 2.c4 Nc6 3.Nc3 e5Tartakower Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 4.d4 exd4 5.Nxd4 g6 6.Nc3 Bg7 7.Be3 O-O 8.Qd2 d5Tartakower Line, Sicilian Dragon 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 Qc8Tartakower Variation, Caro 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6Tartakower Variation, Dutch 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4Tartakower Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Nfd7Tartakower Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ne4Tartakower Variation, Hungarian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Be7 4.d4 exd4 5.c3 Nf6 6.e4 Ne4Tartakower Variation, QGD; D58 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 b6Tartakower Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 Nf6Tartakower Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Qe2
Tartakower Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6 bxc6 6.Nd2Tartakower Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.c3Tartakower-Indian 1.d4 Nf6 2.c4 d6 3.Nf3 Bg4Tashkent Attack, KGA 1.e4 e5 2.f4 exf4 3.Nf3 Nf6 4.e5 Nh5 5.g4Tate Gambit, Dutch 1.d4 f5 2.g4 fxg4 3.e4 d5 4.Nc3Tautvaisis Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 Nc6Taylor Opening; Inverted Hungarian 1.e4 e5 2.Nf3 Nc6 3.Be2Teichmann Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4Teichmann Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 f6Teichmann Variation, QGD 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.Qc2Tejler Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.Bf4Tejler Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 Qxd4 6.Be3 Qg4 7.Qf2 Ne4 8.Nxe4 Qxe4 9.O-O-O Nc6 10.Bd3Tennison G; Lemberg G; Abonyi G 1.Nf3 d5 2.e4Therkatz-Herzog, Italian 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 Ne7Thorold Attack, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.d4Thorold Gambit 1.e4 e5 2.Bc4 b5 3.Bxb5 f5Three Knights Opening; C46 1.e4 e5 2.Nf3 Nc6 3.Nc3Three Knights System, English; A27 1.c4 e5 2.Nc3 Nc6 3.Nf3Three Knights Variation, Grunfeld; D90 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3Three Knights Variation, Nimzo-Indian; E21 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3Three Knights Variation, QGD; D37 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3Three Knights Variation, Slav; D15 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3Three Knights Variation, Vienna; C28 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nc6Three Pawn Attack, St George 1.e4 a6 2.d4 e6 3.c4Three Pawns Attack 1.e4 g6 2.d4 Bg7 3.f4Thuring Gambit; Hartlaub-Charlick Gambit 1.d4 e5 2.dxe5 d6Tiers Counter-Gambit 1.e4 f5Timman's Line, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Qb3Tiviakov Defense, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Na6Tiviakov-Fischer Attack, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Nxf6+ Nxf6Tolush Variation, Semi-Slav 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 Qxg2Tomalty Gambit, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nf6 5.Nc3 c5Torre Attack 1.d4 Nf6 2.Nf3 e6 3.Bg5Torre Attack 1.d4 Nf6 2.Nf3 b6 3.Bg5Torre Attack, QP; D03 1.d4 d5 2.Nf3 Nf6 3.Bg5Tortoise Opening 1.e4 e5 2.Bd3Traditional Closed Sicilian 1.e4 c5 2.Nc3 Nc6Traditional System QGA; D26 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6Traditional Variation, KGA; C38 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7Traditional Variation, QGD 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5Traditional Variation, QID; E17 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7Trajkovic Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 Bb7Transpositional Variation, Keres Defense 1.d4 e6 2.c4 Bb4+ 3.Nc3Traxler; Wilkes-Barre Var, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5Trencianske-Teplice Gambit, Two Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5 5.Bxf7+ Ke7 6.d4Treybel; Flohr; Exchange Var Deferred 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Bxc6Trifunovic Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 Bf5Trifunovic Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5 5.Nxe5 Bd6 6.O-O O-O 7.c4 Bxe5Trifunovic Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 d5Trifunovic Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5 7.e3 e6 8.Qb3 Bb4Troger Variation, English 1.c4 e5 2.Nc3 d6 3.g3 Be6 4.Bg2 Nc6Troger Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Be6Trompowsky; Opocensky; Ruth Opening 1.d4 Nf6 2.Bg5
Tubingen Gambit, Dunst 1.Nc3 Nf6 2.g4Tumbleweed; King's Own, KGA 1.e4 e5 2.f4 exf4 3.Kf2 Two Knight Variation, French 1.e4 e6 2.Nc3 d5 3.Nf3Two Knight Variation, Modern Defense 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3Two Knights Attack, Caro Kann 1.e4 c6 2.Nc3 d5 3.Nf3Two Knights Attack, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4Two Knights Defense; C55 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6Two Knights Line, Symmetrical English; A37 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3Two Knights System, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 Two Knights System, Veresov 1.d4 d5 2.Nc3 Nf6 3.Bg5 Nbd7 4.Nf3Two Knights Variation, Caro 1.e4 c6 2.Nf3 d5 3.Nc3Two Knights Variation, English 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4Two Knights Variation, English; A22 1.c4 e5 2.Nc3 Nf6Two Knights Variation, French 1.e4 e6 2.Nf3 d5 3.Nc3Two Knights Variation, Old Indian; A54 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3Two Knights Variation, Symmetrical English; A35 1.c4 c5 2.Nc3 Nc6 Two Knights Variation, Tarrasch 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3Twyble Attack, Dunst 1.Nc3 c5 2.Rb1Ueberlinger Gambit 1.d4 Nf6 2.g3 e5Uhlmann Variation, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Bg5Uhlmann Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.Nf3 h6 6.Bh4 O-O 7.Rc1 dxc4Uhlmann-Szabo System, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O e5Ukranian Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O a5Ukranian Variation 1.d4 Nf6 2.c4 d6 3.Nc3 e5Ultra-delayed Exchange Variation, Neo-Grunfeld 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6 7.cxd5 cxd5Ulvestad Variation, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5Ulvestad Variation, Evans 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.Bb2Ulysses Gambit, Caro 1.e4 c6 2.d4 d5 3.Nf3 dxe4 4.Ng5Unzicker Attack, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.e5Urosov Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Bc4Urusov Attack, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.Bc4+ d5 8.Bxd5+ Ke8 9.d4Urusov Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.d4 exd4 4.Bc4Urusov; Ouroussoff; Keidansky G 1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.Nf3Van der Wiel Attack, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nc3Van Geet; Kevitz; Trajkovic; Mexican 1.d4 Nf6 2.c4 Nc6Van't Kruijs Opening 1.e3 e5Vehre Variation, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.Nc3 Nf6Velimirovic Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 Be7 8.Qe2Venezolana 1.d3 c5 2.Nc3 Nc6 3.g3Venice Attack, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 e5 6.Bb5+Venice Attack, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Bb5+Venice System, Sicilian 1.e4 c5 2.Nf3 a6 3.c3Veresov Variation, QP 1.d4 d5 2.Nc3 Nf6 3.Bg5 Bf5 4.Bxf6Versov; Betbeder; Schwartz Defense, QGA 1.d4 d5 2.c4 dxc4 3.e4 f5Vienna Gambit 1.e4 e5 2.Nc3 Nc6 3.f4Vienna Gambit, Vienna; C29 1.e4 e5 2.Nc3 Nf6 3.f4Vienna Hybrid, Bishop 1.e4 e5 2.Bc4 Nf6 3.d3 Nc6 4.Nc3Vienna Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6Vienna Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3Vienna Variation, QGD 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 Bb4+Vienna Variation, QGD; D39 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4 5.Bg5 dxc4Vienna Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 dxc4Vienna; Hamppe Opening; C25 1.e4 e5 2.Nc3
Vinken System, Sicilian; Grand Prix Attack 1.e4 c5 2.Nc3 Nc6 3.f4Vinogradov Var, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Qe7Vistaneckis (Nimzovich) Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ng8Vitolins Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bb5+Vitolinsh-Adorjan Gambit, Nimzo Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 b5Vitzhum Attack, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.Ng5 Nh6 6.Qh5Von Beivorseen 1.d4 Nf6 2.Nc3 c5 3.dxc5Von der Lasa Gambit 1.e4 e5 2.d4 exd4 3.Bc4Von Hennig Gambit, Caro 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Bc4Von Hennig Gambit, QGD 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4 5.Qxd4 Nc6 6.Qd1 exd5 7.Qxd5 Be6Von Popiel Gambit 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Bg5Vukovic Gambit, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.d4 Nxe4 5.d5 Bc5Vulture Defense, Benoni 1.d4 c5 2.d5 Nf6 3.c4 Ne4Vulture Variation; Der Geier 1.d4 Nf6 2.c4 c5 3.d5 Ne4Wade Defense 1.Nf3 d6Wade Defense 1.d4 d6 2.Nf3 Bg4Wade Gambit, English 1.c4 f5 2.g4Wade Variation, French 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Qb6 5.Nf3 Bd7Wade Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7Wagner Variation, Tarrasch 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Bg4Walker (Urusov) Attack, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.Bc4+Walker Variation, Bishop 1.e4 e5 2.Bc4 Bc5 3.c3 d5 4.Bxd5 Nf6 5.d4Walkerling 1.e4 e5 2.f3 Nf6 Wall Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 c5Waller Attack, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O d6 8.Qb3Ware Defense 1.e4 a5Ware Gambit 1.a4 e5 2.a5 d5 3.e3 f5 4.a6Ware; Meadow Hay; Crab 1.a4Warsaw Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.c3Warsaw Variation, Dutch; A88 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 c6Wasp Variation 1.e4 e5 2.Nf3 d5 3.Nxe5 dxe4 4.Bc4 Qg5Wayward Queen; Danvers; Parnham 1.e4 e5 2.Qh5Weber Gambit 1.e4 e5 2.d3 d5 3.exd5 c6 4.dxc6 Nxc6Webster Gambit 1.d4 Nf6 2.f3 c5 3.d5 e6 4.e4 exd5 5.e5Weenink Variation, Benoni 1.d4 Nf6 2.c4 c5 3.dxc5 e6Weinsbach Declination, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e6Weiss Defense, KGA 1.e4 e5 2.f4 exf4 3.Be2 f5 4.exf5 d6Weiss Variation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3Welling Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.b3Welling Variation, Queen Pawn Game 1.d4 d5 2.Bg5 Bg4Westerinen Line, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Nd6 6.Bxc6 dxc6 7.dxe5 Ne4Westermann Gambit 1.e4 g6 2.d4 Bg7 3.Bd2Westphalian Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 Bb4 6.Nf3 c5Whale Opening 1.e4 e5 2.c4Wheeler Gambit, Nimzovich Defense 1.e4 Nc6 2.b4 Nxb4 3.c3 Nc6 4.d4Wiesbaden Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 e6Wiesengren Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bc5Wikstrom Gambit, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Nbc6Wild Bull Defense 1.e4 Nh6Wild Cunningham Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Bh4+ Williams Gambit, Bird 1.f4 d5 2.e4 dxe4 3.Nc3Williams Variation, Nimzovich 1.e4 Nc6 2.Nf3 d6Wimpy System, English 1.c4 e6 2.Nf3 d5 3.b3 Nf6 4.Bb2 c5 e3
Winawer Attack, Ruy Lopez 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 O-OWinawer Counter Gambit, Slav 1.d4 d5 2.c4 c6 3.Nc3 e5Winawer Defense, Three Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 f5Winawer Variation, French; C15 1.e4 e6 2.d4 d5 3.Nc3 Bb4 Winckelmann-Riemer Gambit, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.a3Wind Gambit 1.e4 g6 2.d4 Bg7 3.Bd3Wind Gambit, Owen Defense 1.e4 b6 2.d4 Bb7 3.f3 e5Wing Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Be7 7.a4Wing Formation, Smith-Morra Declined, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 Qa5Wing Gambit Deferred, Sicilian 1.e4 c5 2.Nf3 e6 3.b4Wing Gambit Deferred, Sicilian 1.e4 c5 2.Nf3 d6 3.b4Wing Gambit, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 g6 4.c4 b5Wing Gambit, French 1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4Wing Gambit, Sicilian 1.e4 c5 2.b4Wing Gambit, Sicilian 1.e4 c5 2.Nf3 a6 3.b4Wing Gambit, Ware Opening 1.a4 b5Wing Variation, English 1.c4 c5 2.b4Wing; Carlsbad Variation, Sicilian 1.e4 c5 2.b4 cxb4 3.a3 bxa3Wolf Gambit, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.Nge2Wolferts Gambit, Polish 1.b4 e5 2.Bb2 c5Woodchuck Variation, St George 1.e4 a6 2.d4 Nc6Woozle Defense, Benoni 1.d4 c5 2.d5 Nf6 3.Nc3 Qa5Wormald Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Qe2Worrall Attack, Ruy Lopez; C86 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2Wulumulu 1.h4 e5 2.d4Wurzburger Trap, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.d3 Qh4 6.g3 Nxg3 7.Nf3 Qh5 8.Nd5 Bxd5 9.Nf4Yankovich Variation, Two Knights 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.Nfd2Yates Defense, KID; E83 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6Yates Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 a5Yates Variation, Ruy; C91 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d4Yates Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bd3Yefimov Gambit, QGA 1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5 b5Yepishin's Line, KID 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 Nh5 10.Qc2Yerevan System, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.Nc3Young Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.Bxf7+ Kxf7 8.d4 Qxd4+ 9.Be3 Qf6Young Variation, KGA 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.Be3Yugoslav Attack, Sicilian Dragon; B76 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-OYugoslav Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 c5Yugoslav Variation, Grunfeld 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 c5Yugoslav Variation, KID; E64 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c5Yusupov-Rubinstein System 1.d4 Nf6 2.Nf3 e6 3.e3Zagoriansky Variation, Catalan 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.a4Zagorovsky Line, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Qxd4Zagreb Variation, Sicilian; B91 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3Zaire Defense 1.d4 Nc6 2.d5 Nb8 3.e4 Nf6 5.e5 Ng8Zaitsev Gambit, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.h4Zaitsev System, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 Zaitsev System, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Re8Zaitsev Variation, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5 d6 8.Nf3 g6 9.Bc4Zaitsev Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.O-O Nd4 5.b4Zaitsev Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Qd7Zeller Defesne, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Bf5Zeller Defesne, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Bf5 4.f3 exf3 5.Qxf3 Bc8
Zhuraviev Countergambit, Vienna 1.e4 e5 2.Nc3 Bb4 3.Qg4 Nf6Zhuravlev Counter-Gambit, Vienna 1.e4 e5 2.Nc3 Bb4 3.Qg4Ziegler; Gunderam's 2nd Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c6Zilbermints Double Countergambit; KGD 1.e4 e5 2.f4 g5Zilbermints Double Gambit I, KGD 1.e4 e5 2.f4 Nc6 3.Nf3 g5Zilbermints Gambit 1.d4 e6 2.c4 e5Zilbermints Gambit II, Englund Gambit 1.d4 e5 2.dxe5 Nc6 3.Nf3 h6Zilbermints Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6 6.Bg5 Be7 7.Bd3 Nc6 8.O-O Nxd4 9.Kh1Zilbermints Gambit, Borg 1.e4 g5 2.d4 e5Zilbermints Gambit, Carr Defense 1.e4 h6 2.d4 e5Zilbermints Gambit, Center Counter 1.e4 d5 2.b4Zilbermints Gambit, English 1.c4 g5 2.d4 e5Zilbermints Gambit, Englund Gambit 1.d4 e5 2.dxe5 Nc6 3.Nf3 Nge7Zilbermints Gambit, Grob 1.g4 d5 2.e4Zilbermints Gambit, QGD 1.d4 d5 2.c4 b5Zilbermints Gambit, St George Defense 1.e4 a6 2.d4 e5Zilbermints Gambit; Nakamura Gambit, Benoni 1.d4 c5 2.b4 cxb4Zilbermints Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Bg5 Bf5 5.Bxf6 exf6 6.g4 Bg6 7.Qe2 Bb4 8.Qb5+Zilbermints Variation, QP 1.d4 d5 2.Nf3 Nf6 3.c4 b5Zilbermints-Benoni Gambit 1.d4 c5 2.Nf3 cxd4 3.b4Zinnowitz Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Bg5Zollner Gambit, Sicilian 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 Qb6Zot 1.d4 d5 2.Bg5Zukertort Defense, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d5Zukertort Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.O-O Nf6 5.c3Zukertort Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 f5 4.Nc3Zukertort Variation, QP 1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3Zukertort Variation, QP; D02 1.d4 d5 2.Nf3Zukertort Variation, Ruy Lopez 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.c4Zukertort Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Ne7Zurich Gambit 1.d4 d5 2.g4Zviagintsev-Krasenkov Attack, English 1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4 4.g4
