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

Albin Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.O-O

Albin-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 g6

Alburt Defense, QP 1.d4 d5 2.Nc3 Bf5

Alburt Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6

Alekhine (Maroczy) Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Ne2

Alekhine Attack, Slav 1.d4 d5 2.c4 c6 3.Nc3 dxc4 4.e4

Alekhine 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 dxc4

Alekhine Gambit, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.e5

Alekhine 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 a5

Alekhine 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.Qe2

Alekhine System, QGA 1.d4 d5 2.c4 dxc4 3.e4 Nf6

Alekhine Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.c4

Alekhine Variation, Catalan 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Qxc4 a6 7.Qc2

Alekhine Variation, Chigorin Defense 1.d4 d5 2.c4 Nc6 3.Nf3 Bg4 4.Qa4

Alekhine Variation, Dutch 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O Ne4

Alekhine Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 a6

Alekhine Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3 Bg4

Alekhine Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4 5.Qa4

Alekhine Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.Nf3 c6 6.e4

Alekhine 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.Nb3

Alekhine Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e3

Alekhine Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e3 b5 6.a4 b4

Alekhine Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Be7 6.Nf3 Nc6 7.Nxe5

Alekhine'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 Bd6

Alekseev Variation, Nimzovich; Heinola-Deppe Gambit 1.e4 Nc6 2.d4 d5 3.Nc3 e5

Alessi Gambit, Grob 1.g4 f5

Alexandre Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 f5

Allgaier; Cotter Cambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5

Althouse; Stiletto Variation, Sicilian 1.e4 c5 2.Nf3 Qa5

Alua Variation 1.e3 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3

Amar; Paris Opening 1.Nh3

Amazon Attack 1.d4 d5 2.Qd3

Amazon, Dunst 1.Nc3 d5 2.e4 dxe4 3.Nxe4 Qd5

American 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.Nd2

Ampel Variation, Reti 1.Nf3 d5 2.Rg1

Amsterdam (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.Qd2

Amsterdam Attack 1.e3 e5 2.c4 d6 3.Nc3 Nc6 4.b3 Nf6

Amsterdam Variation, Sicilian; B93 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4

Amsterdam Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Nc3

Anderssen (Richter) Attack, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.Bxf6

Anderssen Counter-Attack, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nh6 7.d4 d6

Anderssen Defense, KGA 1.e4 e5 2.f4 exf4 3.Bc4 g5

Anderssen Defense, Kieseritsky Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6

Anderssen Defense, Vienna 1.e4 e5 2.Nc3 Bc5

Anderssen Gambit 1.e4 e5 2.Bc4 b5 3.Bxb5 c6

Anderssen Opening 1.a3

Anderssen Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5

Anderssen Variation, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Be7

Anderssen 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 Nf6

Anderssen-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 Nxf4

Andersspike 1.a3 g6 2.g4

Andreaschek Gambit, Sicilian 1.e4 c5 2.d4 cxd4 3.Nf3 e5 4.c3

Anglo Scandanavian Defense, English 1.c4 d5

Anglo System, English; A15 1.c4 Nf6

Anglo-Dutch 1.c4 e5 2.Nc3 f5

Anglo-Dutch Defense 1.c4 f5

Anglo-Lithuanian Variation, English 1.c4 Nc6

Anglo-Polish Dutch 1.c4 f5 2.b4

Anglo-Slav Opening 1.d4 c6 2.c4 d6

Anglo-Slav, English; A11 1.c4 c6

Anti-anti-grunfeld 1.c4 Nf6 2.Nc3 g6 3.Nf3 Bg7 4.e4

Anti-Benoni Variation, Symmetrical English; A31 1.c4 c5 2.Nf3 Nf6 3.d4

Anti-Classical Line, Dutch 1.d4 f5 2.Qd3 e6 3.g4

Anti-English, Najdorf Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 Ng4

Anti-Grunfeld Variation 1.d4 Nf6 2.c4 g6 3.d5

Anti-Leningrad Variation, Dutch 1.d4 f5 2.Qd3 g6 3.g4

Anti-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.a4

Anti-Meran Gambit, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5

Anti-Modern 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Bc4 c6 5.Qe2

Anti-Modern, Dutch 1.d4 f5 2.Qd3 d6 3.g4

Anti-Moscow Gambit 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 h6 6.Bh4

Anti-Nimzo-Indian; E10 1.d4 Nf6 2.c4 e6 3.Nf3

Anti-Noteboom Gambit, Semi-Slav 1.d4 d5 2.c4 e6 3.Nf3 c6 4.Nc3 dxc4 5.g3

Anti-Noteboom Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.Bg5

Anti-Philidor 1.e4 d6 2.d4 Nf6 3.Nc3 Nbd7 4.f4

Anti-Pirc Variation, Dunst 1.Nc3 g6 2.h4

Anti-Queen's Indian System 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.Nc3

Anti-Sozin Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 Qb6

Anti-Stonewall, Dutch 1.d4 f5 2.Qd3 d5 3.g4

Anti-Tartakower Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bxf6

Anti-Torre 1.d4 d5 2.Nf3 Bg4 3.Ne5 Bf5 4.g4

Anti-Torre, QP 1.d4 d5 2.Nf3 Bg4

Anti-Veresov 1.d4 d5 2.Nc3 Bg4

Anti-Winawer Gambit, Slav 1.d4 d5 2.c4 c6 3.Nc3 e5 4.e4

Antoshin-Hort Variation, Dutch 1.d4 f5 2.g3 Nf6 3.Bg2 d6

Arafat Gambit 1.d4 Nf6 2.e4 Nxe4 3.Bd3 Nf6 4.Bg5

Argenitne; 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 g5

Argentine 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 Bg4

Argentine 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.Bh4

Argentinian Gambit, QGD 1.d4 d5 2.c4 Bf5 3.cxd5 Bxb1 4.Qa4+ c6 5.dxc6 Nxc6 6.Rxb1 Qxd4

Arkangelsk; 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 cxd4

Aronin System, Sicilian 1.e4 c5 2.Nf3 a6 3.Be2

Aronin-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 Nc6

Arseniev 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.c4

Asymmetrical Variation, English 1.c4 c5 2.Nc3 Nf6 3.Nf3 d5 4.cxd5 Nxd5

Atkinson (Kloosterboer) Variation, Center Counter 1.e4 d5 2.exd5 c6 3.dxc6 e5

Australian Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.h4

Austrian Attack, Pirc; B09 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4

Austrian Defense; Summetrical Defense, QGD 1.d4 d5 2.c4 c5

Austrian; 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 b5

Averbakh Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5

Averbakh Variation, Modern 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4

Averbakh 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.Nxd4

Averbakh Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6

Baarn Variation, Slav; Bled Attack 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Nh4

Baeuerle Gambit, French 1.e4 e6 2.d4 b5

Baldwin 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.Nd5

Balla 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 Qc7

Balogh Defense, Dutch 1.d4 f5 2.e4 d6

Balogh Defense, Pirc 1.e4 d6 2.d4 f5

Balogh Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Bc4

Balogh; Tartakower C-G, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 d6

Baltic Defense, QGD 1.d4 d5 2.c4 Bf5 3.cxd5 Bxb1 4.Qa4+ c6 5.dxc6 Nxc6

Banzai-Leong Gambit, French 1.e4 e6 2.b4

Barcza Line, Sicilian 1.e4 c5 2.Nf3 a6 3.c3 Nf6

Barcza Opening, Reti; A07 1.Nf3 d5 2.g3

Barcza Variation, Dutch 1.d4 f5 2.Nf3 Nf6 3.c3

Bardeleben Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 dxc3 5.Nxc3 Bb4 6.Bc4 Nf6

Bardeleben Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Qf3 f5

Barendregt-Fischer Var, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O

Barmen Defense, Sicilian 1.e4 c5 2.c3 d5 3.exd5 Qxd5

Barmina Gambit, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Bc5

Barnes Defense 1.e4 f6

Barnes; Gedult-Gunderam; Walkerling 1.f3

Barnes; Smyslov; Fianchetto Var, Ruy 1.e4 e5 2.Nf3 Nc6 3.Bb5 g6

Barry Attack 1.d4 Nf6 2.Nf3 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Be2

Basman Defense; Macho Grob 1.e4 g5

Basman Gambit 1.e4 e5 2.Nf3 Nc6 3.Be2 Nf6 4.d4 exd4 5.e5

Basman Gambit, KGA 1.e4 e5 2.f4 exf4 3.Qe2

Basman Variation, Dutch 1.d4 f5 2.g3 g6 3.Bg2 Bg7 4.Nf3 c6 5.O-O Nh6

Basman; 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 Nxe4

Basque 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.c3

Basque Opening 1.d4 Nf6 2.b3

Bastrikov Variation, Sicilian; B47 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7

Batavo Polish Attack, Bird 1.f4 Nf6 2.Nf3 g6 3.b4

Battambang, Dunst 1.Nc3 e5 2.a3

Bavarian Gambit 1.e4 e5 2.c4 d5

Bayonet 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.b4

Bayonet Attack, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.h4

Bayonet Variation, Caro 1.e4 c6 2.d4 d5 3.e5 Bf5 4.g4

Bayreuth Variation, ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Bxc6

Becker; Anti-Kieseritzky Var, KGA 1.e4 e5 2.f4 exf4 3.Nf3 h6

Beefeater 1.c4 g6 2.Nc3 Bg7 3.d4 c5 4.d5 Bxc3 5.bxc3 f5

Beefeater Variation 1.d4 g6 2.c4 Bg7 3.Nc3 c5 4.d5 Bxc3+ 5.bxc3 f5

Been & Koomen; Dutch & Peruvian 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5

Belgrade Gambit, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nd5

Beliavsky Gambit, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Nf3 Qf5 7.Qd1 e5

Beliavsky Line, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.Bg5 f6

Bello Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6 7.Nc3

Bellon Gambit 1.d4 e6 2.c4 f5 3.e4

Bellon Gambit, Dutch 1.d4 f5 2.c4 e6 3.e4

Bellon Gambit, English 1.c4 e5 2.Nc3 Nf6 3.Nf3 e4 4.Ng5 b5

Benelux Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 Nf6 5.d4 Bb6 6.O-O O-O

Benima Defense, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Be7

Benjamin Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Qb6

Benko 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.f3

Benko Gambit Accepted 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5

Benko Gambit Declined; Hjoerring Countergambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.e4

Benko Gambit; Volga; Opocensky; Vaitonis; A57 1.d4 Nf6 2.c4 c5 3.d5 b5

Benko 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.g4

Benko; 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 c5

Benoni Defense, Nimzo-Indian; E31 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5 6.d5 d6

Benoni Gambit Accepted 1.d4 c5 2.dxc5

Benoni Reversed; Wing Blumenfeld 1.Nf3 d5 2.c4 d4

Benoni-Indian Defense 1.d4 c5 2.d5 Nf6

Benoni-Staunton Gambit 1.d4 c5 2.d5 f5 3.e4

Berg Variation 1.d4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 c5 5.c4 cxd4 6.Qxd4

Berger (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.Nbd2

Berger 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.Nc3

Berlin 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 Nf6

Berlin Defense, Ruy Lopez; C65 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6

Berlin Variation, Nimzo-Indian; E38 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5

Berlin 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 Nc5

Berlin; 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.Re1

Berliner 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 Qh4

Bernstein Defense; Gligoric System; E53 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5

Bernstein 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 Ne7

Bernstein Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bh4

Bernstein 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 Nc6

Bernstein 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.bxc3

Bernstein 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.Nbd2

Bertin; Three Pawns Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Bh4+ 5.g3

Betbeder; Veresov; Levitzky; Parisian 1.d4 d5 2.c4 dxc4 3.e4 f5

Beverwijk Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Bc5

Beyer Gambit 1.e4 e5 2.d4 d5

Big Clamp Variation, Sicilian 1.e4 c5 2.d3 Nc6 3.c3 d6 4.f4

Bileefelder Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 Bc5

Bilguer Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4

Bilguer-Mirage Variation, KGA 1.e4 e5 2.f4 exf4 3.Qe2

Billinger Gambit, QGA 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.a3

Bird Attack, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.b4

Bird Defense, Ruy Lopez; C61 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4

Bird Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Ne5 Qh4+ 6.g3

Bird Gambit, Philidor 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.c3

Bird Invitation, French 1.e4 e6 2.Bb5

Bird 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 Be6

Bird's Opening; Dutch Attack 1.f4

Birmingham Gambit, Polish 1.b4 c5

Bishop Attack 1.e4 g6 2.d4 Bg7 3.Bc4

Bishop 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.Bd3

Bishop Attack, Tarrasch 1.d4 d5 2.c4 e6 3.Nf3 c5 4.cxd5 exd5 5.Bg5

Bishop Attack; Levitsky Attack, Queen Pawn Game 1.d4 d5 2.Bg5

Bishop Defense, QP; Anti-Colle 1.d4 d5 2.Nf3 Nf6 3.e3 Bf5

Bishop Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Bc5

Bishop's Gambit, KGA 1.e4 e5 2.f4 exf4 3.Bc4

Bishop's Opening; C23 1.e4 e5 2.Bc4

Blachy Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Nc6

Blackbunre Attack, KGD 1.e4 e5 2.f4 d5 3.Nf3

Blackbunre-Kloosterboer Gambit, Center Counter 1.e4 d5 2.exd5 c6 3.dxc6 e5

Blackburne Attack, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.Nd5 Bc5 7.d4

Blackburne Attack, Dutch 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Bg7 5.Nh3

Blackburne Attack, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Qd2

Blackburne Defense, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7

Blackburne Gambit, Center Counter 1.e4 d5 2.exd5 c6 3.dxc6 Nxc6

Blackburne Variation, Dutch 1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nh3

Blackburne's Move, QGA; Normal Variation, QGA; D21 1.d4 d5 2.c4 dxc4 3.Nf3

Blackmar Gambit; Gedult Gambit 1.d4 d5 2.e4 dxe4 3.f3

Blackmar-Diemer Gambit 1.d4 d5 2.e4

Blackmar-Diemer Gambit 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3

Blackmar-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.f3

Bladel Variation, Dutch 1.d4 f5 2.c4 g6 3.Nc3 Nh6

Blanel Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.Nc3 Nxe4

Bled Variation, English 1.c4 c6 2.Nf3 d5 3.b3 Nf6 4.g3 g6

Bledow Countergambit, KGA 1.e4 e5 2.f4 exf4 3.Bc4 d5 4.Bxd5 Nf6

Bledow; Morphy Defense, KGA 1.e4 e5 2.f4 exf4 3.Bc4 d5

Blockade Variation; Semi-Benoni; Russian Variation 1.d4 c5 2.d5 e5 3.e4 d6

Bloodgood Gambit, Reti 1.Nf3 d5 2.b3 c5 3.e4 dxe4 4.Ne5

Blumenfeld Countergambit 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5

Blumenfeld Countergambit Accepted 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.dxe6 fxe6 6.cxb5 d5

Blumenfeld Variation 1.d4 Nf6 2.c4 e6 3.Nf3 c5

Blumenfeld 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.Nxb5

Blumenfeld Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.Nb5

Bobotsov-Korchnoi-Petrosian Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Nge2

Boden Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Nc6

Boden Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Qxd4 Bd7

Boden Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 Qe7

Boden-Kieseritzky Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Bc4 Nxe4 4.Nc3

Boden-Kieseritzky Gambit, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Nf3

Boehnke Gambit Accepted, Center Counter 1.e4 d5 2.exd5 e5 3.dxe6 Bxe6

Boehnke Gambit, Center Counter 1.e4 d5 2.exd5 e5

Bogoljubov 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

Bogoljubov; Jaenisch Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Nf6 4.Nc3 c6

Bogoljubov; Mikenas-Van Geet Defense 1.d4 Nc6

Bogoljubow (Scotch) Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4

Bogoljubow Defense, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3 a6 5.e4

Bogoljubow 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 g6

Bogoljubow Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Bd2

Bogoljubow Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Nf6 4.Nc3

Bogoljubow Variation, Nizovich Defense 1.e4 Nc6 2.d4 d5 3.Nc3

Bogoljubow 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 c4

Bogoljubow 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.Qf3

Bogoljubow; 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 Bg4

Boleslavsky Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.Nf3 Nc6 7.Be3

Boleslavsky Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5

Bonet Gambit, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Bg5

Bonsch-Osmolovsky Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 Ne7

Bonsdorf Variation, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 4.a3 b6

Borg Defense; Troon Gambit 1.e4 g5 2.d4 h6 3.h4 g4

Borg Gambit 1.d4 g5

Borg Gambit 1.e4 g5 2.d4 Bg7

Borg Variation, Trompowsky 1.d4 Nf6 2.Bg5 Ne4 3.Bf4 g5

Borisenko 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

Borisenko 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 Nc6

Borisenko-Furman Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e4

Botvinnik Defense, Sicilian Closed 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e5

Botvinnik Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e4

Botvinnik System Reversed, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 e5

Botvinnik System, King's English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.e4

Botvinnik System, Nimzo-Indian; E49 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.a3 Bxc3+ 7.bxc3

Botvinnik 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.Qd3

Botvinnik Variation, Dutch; A93 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 O-O 6.O-O d5 7.b3

Botvinnik Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4

Botvinnik Variation, French 1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.e4 Nfd7 5.Bd3 c5 6.c3 b6

Botvinnik Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3 e6

Botvinnik Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Rc1 c5 7.dxc5 Be6

Botvinnik 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 Nxd5

Botvinnik Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Nc6

Botvinnik Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 6.e4 b5

Botvinnik Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Bd3

Botvinnik Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 h6 6.Bh4 g5 7.Bg3 Nh5

Botvinnik Variation, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4

Botvinnik-Bronstein Variation, Dutch 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nc3 O-O 6.e3

Botvinnik-Carls Defense, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 c5

Bouncing Bishop Variation 1.e3 e5 2.Bc4 b5 3.Bb3

Bourdonnais (La Bourdonnais) Variation, French 1.e4 e6 2.f4

Bourdonnais; Lowenthal Var, Sic 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5

Bowlder Attack, Sicilian 1.e4 c5 2.Bc4

Boyce Defense, Veresov 1.d4 d5 2.Nc3 Nf6 3.Bg5 Ne4

Bradford Attack, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.dxc5 Bxc5 7.Qg4

Bradley Beach Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d4 e4

Brandics Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.Nc3 a6

Braune Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Be3

Bremen; Carls Variation, English 1.c4 e5 2.Nc3 Nf6 3.g3

Bremen-Hort Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 d6 6.Nge2 Be6

Brentano Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O d5

Brentano Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 g5

Breslau 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.Nd4

Breyer Defense, Nimzovich 1.e4 Nc6 2.Nc3 Nf6

Breyer Opening, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.d3 Be7 5.b4

Breyer Variation, Caro-Kann 1.e4 c6 2.d3

Breyer Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 c5

Breyer 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 Ng4

Breyer Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nbd2

Breyer Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Nf3 Be7

Breyer; Hungarian; Carrera, KGA 1.e4 e5 2.f4 exf4 3.Qf3

Breyer; 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 Nb8

Brick Variation, Sicilian 1.e4 c5 2.Nh3

Brieger Defense; Sahovic Defense, QGD; Baltic Defense 1.d4 d5 2.c4 Bf5

Brinckmann 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 g6

Brix Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O g6

Brodsky-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 f6

Brombacher; Daberitz Var, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 c5

Bronstein (Haag) Gambit, Sicilian 1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Qxd7 5.O-O Nc6 6.c3 Nf6 7.d4

Bronstein Attack, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Be2

Bronstein 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 Nxf1

Bronstein Gambit 1.d4 Nf6 2.g4

Bronstein Gambit, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Qh5+ g6 7.Qe2

Bronstein Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.Bc4 Nf6 4.f4 Nxe4 5.Nf3

Bronstein Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 c6 7.O-O Qa5

Bronstein Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Ne2

Bronstein Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 Nf6 5.Nf3 a6

Bronstein 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 Nxc4

Bronstein 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 Bd7

Bronstein 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.Ne2

Bronstein Variation, Nimzo-Indian; E45; Byrne Variation 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Ba6

Bronstein 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 Nbd7

Bronstein Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Qd6

Bronstein Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 Nf6 6.Nc3 Bb4 7.Bd3 Nc6

Browne 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.cxd5

Browne 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 Qc7

Brussels Gambit, Sicilian 1.e4 c5 2.Nf3 f5

Bryan; Kieseritzky Gambit, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 b5

Bucker Defense, Grob 1.g4 Nh6

Bucker Defense, Polish 1.b4 Na6

Buckley Attack, Alekhine 1.e4 Nf6 2.e5 Nd5 3.Na3

Budapest Defense; A51 1.d4 Nf6 2.c4 e5

Buecker Gambit 1.e4 g6 2.d4 Bg7 3.Bc4 b5

Buecker Variation, Sicilian 1.e4 c5 2.Nf3 h6

Buerger Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 6.d5 exd5 7.Ng5

Bugayev Attack, Polish 1.b4 e5 2.a3

Bulgarian Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a5

Bullfrog; Weidenhagen; Krabbe; Ochsenfrosch 1.d4 Nf6 2.g4

Buntin Gambit, Alekhine 1.e4 Nf6 2.e5 Nd5 3.e6

Burgar Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 d6

Burgess Line, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Na6 7.Qd2 c6

Burille Variation, Grunfeld; D94 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3

Burn Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4

Byrne Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 c6 7.Bd3 a6

Byrne Variation, Sicilian; English Attack 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3

Calabrese Counter-Gambit 1.e4 e5 2.Bc4 f5

Cambridge Gambit, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 g5

Cambridge Springs; Pillsbury Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5

Campbell; 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 Nf6

Canal Attack, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.exd5 exd5 5.Bd3 Ne7 6.Qh5

Canal Variation, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6 5.Nc3 d6 6.Bg5

Canal; Venice Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.cxd5 Qb6

Canard Attack 1.d4 Nf6 2.f4

Canard Formation; Double Duck 1.f4 f5 2.d4 d5

Cannstatter Variation, Mikenas 1.d4 Nc6 2.c4 e5 3.d5 Nd4

Capablanca 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 Nd5

Capablanca Line, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Ne5

Capablanca Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Rc1

Capablanca Variation, Indian Game; A47 1.d4 Nf6 2.Nf3 b6

Capablanca 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 Ne8

Capablanca 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 Ne8

Capablanca Variation, QGD 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nbd2

Capablanca 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.Bb5

Capablanca 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 e6

Carlsbad Variation, Dutch 1.d4 f5 2.g3 g6 3.Bg2 Bg7 4.Nh3

Carlsbad Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6

Carlsbad Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxd2

Carlsbad 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 e5

Carlsbad 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

Carlson Gambit, French 1.e4 e6 2.d4 d5 3.Nf3 dxe4 4.Ne5

Caro Variation, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 Bd7

Caro Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5

Caro-Kann Defense; B10 1.e4 c6

Carr Defense 1.e4 h6

Carrera Gambit, KGA 1.e4 e5 2.f4 exf4 3.Qh5

Catalan Opening 1.d4 Nf6 2.c4 e6 3.g3

Center Attack, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4

Center Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.e5 Ne4 5.Qxd4

Center Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4 exd4

Center Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.d4

Center Counter; Scandanavian; B01 1.e4 d5

Center Formation, Smith-Morra Declined, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 e5

Center Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 d6 4.d4 exd4 5.O-O

Center Game Accepted 1.e4 e5 2.d4 exd4

Center 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.e4

Center Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.e4

Central Countergambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d5

Central Storming Variation, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.f4

Central; Polerio; Willemson, Steinitz 1.e4 e5 2.f4 exf4 3.d4

Chabanon Gambit, English 1.c4 f5 2.Nf3 d6 3.e4

Chameleon Sicilian 1.e4 c5 2.Nc3 Nc6 3.Nge2

Chameleon Variation, Sicilian 1.e4 c5 2.d3

Chameleon Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 a6

Chandler Gambit, QP 1.d4 d5 2.Nf3 c5 3.g3 cxd4 4.Bg2

Charlick Gambit; Englund Gambit 1.d4 e5

Charousek Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 Bb6

Chatard-Alekhine; Albin Attack, Fr 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4

Chekhover 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 b5

Chepukaitis Gambit 1.d4 Nf6 2.Bg5 c5 3.d5 Qb6 4.Nc3 Qxb2 5.Bd2 Qb6

Chicago 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 a6

Chicago; Irish; Schulze-Muller Gambit 1.e4 e5 2.Nf3 Nc6 3.Nxe5 Nxe5 4.d4

Chigorin Defense, Danish Gambit 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Qe7

Chigorin Defense, QGD; D07 1.d4 d5 2.c4 Nc6

Chigorin Gambit, Damiano 1.e4 e5 2.Nf3 f6 3.Nxe5 Qe7 4.Nf3 d5

Chigorin Line, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O Nc6

Chigorin Variation, Dutch 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 c6

Chigorin Variation, French 1.e4 e6 2.Qe2

Chigorin Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.exf6

Chigorin 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

Chigorin Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 Bd6

Chigorin Variation, QP 1.d4 d5 2.Nf3 Nc6

Chigorin 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.Nc3

Chinese Variation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.g4

Chiodini Gambit 1.e4 e5 2.Nf3 Bc5 3.Nxe5 Nc6

Chistiakov Defense, French 1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 Qxd5

Christensen Gambit, QGA 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Nf3

Clam Gambit, Latvian 1.e4 e5 2.Nf3 f5 3.d3 Nc6 4.exf5

Clam Variation; Leonardis Variation 1.e4 e5 2.d3

Clarendon Court Variation, Benoni 1.d4 c5 2.d5 f5

Classical Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4

Classical Defense Deferred, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Bc5

Classical Defense, Colle System; D05 1.d4 d5 2.Nf3 Nf6 3.e3 e6

Classical Defense, Danish Gambit 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Nf6

Classical Defense, KGA; Lopez Variation 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5

Classical 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 d5

Classical Defense, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5

Classical Defense, Veresov 1.d4 d5 2.Nc3 Nf6 3.Bg5 e6 4.Nf3

Classical 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 Nf6

Classical Line, Catalan; E05 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Be7

Classical Main Line, Grunfeld; D86 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4

Classical System, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2

Classical Tarrasch Gambit 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be7 8.O-O O-O 9.dxc5 d4

Classical Variation, Benoni; A70 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Nf3

Classical 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 Bf5

Classical Variation, Dutch 1.d4 f5 2.c4 e6

Classical Variation, Dutch 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2

Classical Variation, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bc5

Classical Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7

Classical Variation, French; C11 1.e4 e6 2.d4 d5 3.Nc3 Nf6

Classical Variation, Italian; C53 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3

Classical Variation, Larsen 1.b3 d5

Classical Variation, Neo-Grunfeld; D77 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O

Classical Variation, Nimzo-Indian; E32 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2

Classical 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.Rxc3

Classical Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O

Classical 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

Classical 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 Nc6

Classical; Cordel Var, Ruy Lopez; C64 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5

Clemenz Opening 1.h3

Closed Bernstein Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Bg5

Closed Defense, Ruy Lopez; C84 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7

Closed Scandavian 1.e4 d5 2.Nc3

Closed Showalter Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7 7.Bxc6

Closed System, Full Symmetry, King's English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6

Closed System, King's English; A26 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3

Closed Variation, Catalan 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2

Closed Variation, KID; E87 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5

Closed Wolf Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 exd4

Closed; Chigorin Variation, Sicilian; B23 1.e4 c5 2.Nc3

Cobra Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Ndb5 Bc5

Cochrane Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nxf7

Cochrane Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 f3

Cocquio Counter Gambit, QGD; Tan Gambit 1.d4 d5 2.c4 Nf6 3.cxd5 c6

Colle System; D04 1.d4 d5 2.Nf3 Nf6 3.e3

Collijn Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5 5.Nf3 Bg4

Colman 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 Rb8

Cologne Gambit, Ware Opening 1.a4 b6 2.d4 d5 2.Nc3 Nd7

Colorado Counter Accepted, Nimzovich Defense 1.e4 Nc6 2.Nf3 f5 3.exf5

Colorado Defense, Nimzovich; Lean Variation 1.e4 Nc6 2.Nf3 f5

Compromised Defense, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O dxc3

Copenhagen 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 Nf5

Cordel Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 f5

Cordel Line, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Be7 6.d4 Na5

Corkscrew Counter-Gambit, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Nf6 4.Bc4 fxe4 5.Nf7 Qe7 8.Nxh8 d5

Cormorant Gambit, Benoni 1.d4 c5 2.dxc5 b6

Corn Stalks 1.e4 a5

Cortlever Gambit, Sicilian 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Bc4

Cortlever Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 Nf6 4.dxc5 Nxe4 5.cxd6

Costa's Line 1.d4 d5 2.c4 Nc6 3.cxd5 Qxd5 4.e3 e5 5.Nc3 Bb4 6.Bd2 Bxc3 7.Bxc3 exd4 8.Ne2

Cotter Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 h6 6.Nxf7

Counter 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.dxc5

Counterthrust Variation 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7

Counterthrust Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5

Cozio (Lasker) Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Qe2

Cozio Attack, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Qf3

Cozio Defense Deferred, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nge7

Cozio Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7

Cozio Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 d6

Cozio; Hanneken; Prussian; Lichtenhein 1.e4 e5 2.f4 exf4 3.Bc4 Nf6

Cracow Variation, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4 Bb4+ 7.Kf1

Creepy Crawly Formation 1.a3 e5 2.h3 d5

Crocodile Variation, Center Game 1.e4 e5 2.d4 exd4 3.f4 Bc5 4.Nf3 Nc6 5.c3

Cunningham Defense, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 Be7

Cunningham Gambit, KGA; C35 1.e4 e5 2.f4 exf4 3.Nf3 Be7

Czech Defense 1.e4 d6 2.d4 Nf6 3.Nc3 c6

Czech Defense, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O c6

Czech Defense; Open Slav Defense; D17 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5

Czech 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 Nb6

Czech-Indian 1.d4 Nf6 2.Nf3 c6

Czerniak 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 Re8

Czerniak Line, Caro-Kann 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qa5

Czerniak 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.Bxe4

Damiano Defense 1.e4 e5 2.Nf3 f6

Damiano Gambit 1.e4 e5 2.Nf3 f6 3.Nxe5 fxe5 4.Qh5+ g6 5.Qxe5+ Qe7 6.Qxh8

Damiano Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nxe4

Danish Gambit 1.e4 e5 2.d4 exd4 3.c3

Danish Gambit Accepted 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2

Danube Gambit; Adorjan Gambit 1.d4 Nf6 2.c4 g6 3.d5 b5

Danube; Donau Gambit 1.d4 Nf6 2.c4 g6 3.d5 b5 4.cxb5 a6 5.bxa6 c6

De Bruycker Defense, Caro 1.e4 c6 2.d4 Na6

De Riviere Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.c3

Debrecen 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.g3

Delayed Alapin, Sicilian 1.e4 c5 2.Nf3 d6 3.c3

Delayed Exchange Ruy Lopez Deferred; C85 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Bxc6

Delayed Exchange Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.exd5

Delayed 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-O

Delayed Fianchetto, KID; E62 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3

Delayed Keres Attack, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.g4

Delmar Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.c3

Despres Opening 1.h4

Deutz Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.O-O Nf6 5.d4

Development Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O Nc6

Devin Gambit, Catalan 1.d4 Nf6 2.c4 e6 3.g4

Diemer Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bf4

Diemer Counterattack 1.d4 e5 2.d5 Bc5 3.e4 Qh4

Diemer Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.fxe4

Diemer Gambit, Slav 1.d4 d5 2.c4 c6 3.e4

Diemer-Duhm Gambit, Caro 1.e4 c6 2.d4 d5 3.c4

Diemer-Duhm Gambit, French 1.e4 e6 2.d4 d5 3.c4

Diemer-Rosenberg Attack, BDG 1.d4 d5 2.e4 dxe4 3.Be3

Diepstraten Countergambit, Latvian 1.e4 e5 2.Nf3 f5 3.c4

Dilworth; 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.Bc2

Dlugy Variation, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.f3

Dodo Gambit, KGA 1.e4 e5 2.f4 exf4 3.Qg4

Donner Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O c6

Dorfman Gambit, Sicilian 1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.O-O Bd7 5.Qe2 g6 6.e5

Dory (Doery) Defense 1.d4 Nf6 2.c4 e6 3.Nf3 Ne4

Dory Defense 1.d4 Nf6 2.Nf3 Ne4

Double Fianchetto Defense, English 1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O g6

Double Fianchetto, KID; E82 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 b6

Double Fianchetto, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.b3

Double Gambit Accepted, Two Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Nxe4

Double Grob 1.g4 g5

Double 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.Bc4

Double Ruy Lopez Opening, 4 Knights; C49 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4

Double Whammy, English 1.c4 e5 2.f4

Double-Dutch Gambit, Sicilian 1.e4 c5 2.Nf3 f5 3.exf5 Nh6

Dragon 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 g6

Dragon Variation, Sicilian; B70 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6

Dresden Opening 1.e4 e5 2.Nf3 Nc6 3.c4

Dreyev Defense, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nc3 Qb6

Dries Counter-Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 c5

Drill Variation, English 1.c4 e5 2.g3 h5

Drunken King, KGA 1.e4 e5 2.f4 exf4 3.Kf2

Drunken Knight Opening 1.Nh3

Dubois Variation, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 d3 4.c4

Duchamp Variation, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d3

Duke 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 Qh1

Dunst Gambit 1.Nc3 d5 2.e4 dxe4 3.d3

Dunst; Heinrichsen; Will Bull; Kotrc 1.Nc3

Dunworth Variation, Modern Defense 1.e4 g6 2.d4 Bg7 3.c4 d5 4.exd5 c6 5.dxc6 Bxd4

Duras 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.Bc1

Duras Variation, QGD; Capablanca Variation 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5 h6

Duras Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 d6 5.c4

Duras Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d3 d6 6.c4

Durkin's Opening; Sodium Attack 1.Na3

Dus-Chotimursky Variation 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.Bg5

Dutch Defense; A80 1.d4 f5

Dutch Indian; Leningrad Variation, Dutch; A81 1.d4 f5 2.g3

Dutch System, QP 1.d4 d5 2.Nc3 f5

Dutch Variation, Larsen 1.b3 f5

Dutch Variation, Slav; D18 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3

Duthilleuk Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 e6 6.Bd3 Nc6 7.Bg5 Be7 8.Ne4

Duz-Khotimirsky Variation 1.d4 Nf6 2.c4 d6 3.Nc3 Nbd7 4.e3 e5 5.Bd3

Dynamic Attack, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Nf3 c5 7.d5

Dzindzi-Indian Defense 1.d4 Nf6 2.c4 e6 3.Nf3 a6

East Indian Defense; E00 1.d4 Nf6 2.c4 e6

Eastbourne Gambit 1.d4 b6 2.c4 Bb7 3.Bxb5

Edge Variation, Sicilian Closed 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e5 7.Nh3 Nge7

Edge Variation, Trompowsky 1.d4 Nf6 2.Bg5 Ne4 3.Bh4

Edinburgh Variation, Caro 1.e4 c6 2.d4 d5 3.Nd2 Qb6

Eifel Gambit, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Bc5 4.Nge2 b5

Eisenberg Variation, KGA 1.e4 e5 2.f4 exf4 3.Nh3

Ekolu Variation 1.e3 e5 2.Nc3 d5 3.f4 exf4 4.Nf3

Ekstrom 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.c4

Ekstrom 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.Ne5

El Columpio Defense, Nimzovich Defense 1.e4 Nc6 2.Nf3 Nf6 3.e5 Ng4

Elbert Counter-Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e5

Ellis Gambit, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 e5

Endgame Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.dxe5

Endgame 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

English Attack, Scheveningen Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.f3

English Defense 1.c4 e6 2.d4 b6

English Defense 1.d4 e6 2.c4 b6

English 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 Nxd5

English Opening; A10 1.c4

English Orangutan 1.c4 Nf6 2.b4

English Queen 1.c4 e5 2.Qa4

English Rat 1.d4 d6 2.c4 e5

English Spike 1.c4 f5 2.g4

English Variation, Larsen 1.b3 c5

English 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 Bg4

Englund Gambit 1.d4 e5 2.dxe5 Nc6 3.Nf3 Qe7

Englund Gambit Declined 1.d4 e5 2.d5

Englund; Behting Gambit 1.d4 e5 2.dxe5 Nc6

Erben Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.Nc3 g6

Erben Gambit, Vienna 1.e4 e5 2.Nc3 Nf6 3.g3 d5 4.exd5 c6

Erbenheimer Gambit, English 1.c4 e5 2.Nc3 Nf6 3.Nf3 e4 4.Ng5 Ng4

Euwe 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 Bd7

Euwe Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5 Ne4

Euwe Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.b3

Euwe Variation, Queen Pawn Game 1.d4 d5 2.Bg5 h6 3.Bh4 c6 4.Nf3 Qb6

Euwe Variation, Torre Attack 1.d4 Nf6 2.Nf3 g6 3.Bg5 Bg7 4.Nbd2 c5

Evans Gambit Accepted 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4

Evans Gambit; C51 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4

Everglades Defense, Alekhine 1.e4 Nf6 2.e5 Ng8 3.d4 f5

Exchange Variation, Caro; B13 1.e4 c6 2.d4 d5 3.exd5

Exchange Variation, Chigorin Defense 1.d4 d5 2.c4 Nc6 3.cxd5 Qxd5

Exchange 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.Be3

Exchange Variation, French 1.e4 e6 2.d4 d5 3.exd5 exd5

Exchange Variation, Grunfeld; 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3

Exchange Variation, Grunfeld; D85 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5

Exchange Variation, Neo-Grunfeld 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.cxd5 Nxd5

Exchange Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 exd4

Exchange Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5

Exchange Variation, Richter-Rauzer Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nxc6

Exchange Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6

Exchange Variation, Schliemann Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Bxc6

Exchange Variation, Slav 1.d4 d5 2.c4 c6 3.cxd5

Exchange Variation, Slav; D13 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5

Exchange 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 Nxd5

Extended Bishop Swap, French 1.e4 e6 2.d4 d5 3.e5 Bd7

Fajarowicz Variation, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ne4

Falkbeer Countergambit Accepted, KGD 1.e4 e5 2.f4 d5 3.exd5

Falkbeer Counter-Gambit, KGD; C31 1.e4 e5 2.f4 d5

Falkbeer Variation, Vienna; C26 1.e4 e5 2.Nc3 Nf6

Fantasy; Lilienfisch Variation, Caro 1.e4 c6 2.d4 d5 3.f3

Farago Defense, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Ba6 5.Qc2 Bb7

Fazekas Gambit, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Na6 7.e4

Felbecker Gambit 1.d4 e5 2.dxe5 Nc6 3.Nf3 Bc5

Fianchetto Defense, QP 1.d4 d5 2.Nc3 g6 3.Nf3 Bg7

Fianchetto Defense, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 g6

Fianchetto Defense, Torre Attack 1.d4 Nf6 2.Nf3 g6 3.Bg5

Fianchetto Gambit, Modern Defense 1.e4 g6 2.d4 f5

Fianchetto Line, Four Knights English; A29 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3

Fianchetto Lines, Two Knights Variation, English; A24 1.c4 e5 2.Nc3 Nf6 3.g3 g6

Fianchetto System, QID; E15 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3

Fianchetto Traditional, QID; E16 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7

Fianchetto Variation, Albin Countergambit; D09 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3

Fianchetto 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.Bg2

Fianchetto Variation, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2

Fianchetto Variation, Dutch; A86 1.d4 f5 2.c4 Nf6 3.g3

Fianchetto Variation, KID 1.d4 Nf6 2.c4 g6 3.g3

Fianchetto 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 b5

Fianchetto Variation, Richter-Rauzer Sicilizn 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.g3

Fianchetto Variation, Scheveningen Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g3

Fianchetto Variation, Sicilian Closed; B24 1.e4 c5 2.Nc3 Nc6 3.g3

Fianchetto Variation, Sicilian Dragon 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.g3

Fianchetto Variation, Symmetrical English 1.c4 c5 2.Nc3 Nf6 3.g3

Fianchetto Variation, Symmetrical English; A36 1.c4 c5 2.Nc3 Nc6 3.g3

Fine Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Qc8 6.O-O c5 7.d5

Fingerslip Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2

Finnish Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 h6

Fischer Attack, Sozin Attack, Sicilian; B86 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4

Fischer Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 d6

Fischer Variation, Nimzo-Indian; E44 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2

Fischer 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.g3

Fishing Pole Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Ng4

Flank Variation, Sicilian; B87 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 a6 7.Bb3 b5

Fleissig; Meitner Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Nc2

Flexible Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 h6

Flexible Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d3

Floh-Mikenas-Carls Variation, English; A19 1.c4 Nf6 2.Nc3 e6 3.e4 c5

Flohr Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.Be2 c6

Flohr Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.Nh3

Flohr Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6 7.O-O Bf5

Flohr 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 Qc7

Flohr; Winawer Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Be6

Flohr; 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 Bb7

Flohr-Mikenas-Carls Variation, English; A18 1.c4 Nf6 2.Nc3 e6 3.e4

Florentine 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.e5

Fluid Attack, KID; E78 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 O-O 6.Be2 c5 7.Nf3

Fluid Formation, Dutch 1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6

Folkestone; Swedish Var, QGD 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 c4

Foltys Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4 fxe4 5.d3

Foltys-Leonhardt Variation, Latvian Gambit 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4

Forgacs Variation, Caro Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.Bc4

Fort Knox Variation, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Bd7 5.Nf3 Bc6

Four Knights Openng; C47 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6

Four 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 Ne5

Four Knights Variation, English; A28 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6

Four 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.Nc3

Four Knights Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3

Four Knights Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6

Four Knights Variation, Symmetrical English 1.c4 c5 2.Nc3 Nf6 3.Nf3 Nf6

Four 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.f4

Four Pawns Attack; Chase V 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4

Franco-Benoni; Franco-Sicilian 1.d4 c5 2.d5 e6 3.e4

Franco-Hiva Gambit I, French 1.e4 e6 2.d4 f5

Franco-Hiva Gambit, French 1.e4 e6 2.d3 f5

Franco-Indian Defense 1.d4 e6

Franco-Nimzovich Variation 1.e4 Nc6 2.Nf3 e6

Franco-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 Ne7

Frankenstein-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 Qe7

Frankfort; Gunderam Var, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Qf6

Frankfurt Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ng8 6.Be3 b6

Fraser Attack, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nf3

Fraser 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.Qa4

Fraser Defense, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Nc6

Fraser Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.g3 fxg3 7.Qf3

Fraser-Minckwitz Variation, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 b6

Freak Attack, Siicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Rg1

Fred; From Reversed 1.e4 f5

Frederico Variation, Sicilian 1.e4 c5 2.Nf3 g6 3.d4 f5

French Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d3

French Connection, Nimzovich Defense 1.e4 Nc6 2.d4 e6

French Defense; C00 1.e4 e6

French Variation, Sicilian; B40 1.e4 c5 2.Nf3 e6

Frenkel Gambit, French 1.e4 e6 2.d4 d5 3.e5 c5 4.b4

Frere; Becker; Katilimov, Maric Var, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Qd5

Fricke Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 d5 4.Nxe5 Qg5 5.O-O

Fried 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.Nxf7

Friess Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Nxe5

Fritz Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Bc4

Fritz Variation, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nd4

From Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qe7

From's Gambit, Bird 1.f4 e5

Full Symmetry Line, Symmetrical English; A38 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6

Fully Accepted Variation, Benko Gambit; A58 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6

Furman Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.dxc5 Bxc5

Furman-Taimanov; Wing Var, Ruy; Norwegian Variation 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Na5

Fyfe Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.d4

Gaga Gambit, KGA 1.e4 e5 2.f4 exf4 3.g3

Gama Gambit, KGA 1.e4 e5 2.f4 exf4 3.g3 fxg3 4.Nf3

Gambit 59 1.g3 d5 2.Bg2 e5 3.b4

Gambit Line, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.c3 d5 4.exd5 Nf6

Gary 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 d5

Gaw-Paw Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Qb6

Gedult Attack 1.d4 Nf6 2.f3 d5 3.g4

Gedult-Gunderam System 1.d4 Nf6 2.f3 d5 3.g4

Geller Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 Nbd7

Geller Line, Sicilian 1.e4 c5 2.Nf3 a6 3.c4 Nc6 4.d4 cxd4 5.Nxd4 e5

Geller 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 Qh3

Geller Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3 Bb6 6.a4 a6 7.Nc3 Nf6

Geller Variation, Symmetrical English 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.g3 Qb6

Geller Variation; Geller-Tolush Var, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.e4

Geller's System, Modern Defense 1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.c3

General Variation, King's English 1.c4 e5 2.Nc3 d6 3.Nf3

General Variation, Staunton Gambit, Dutch; A83 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5

Geschev Gambit, Alekhine 1.e4 Nf6 2.Nc3 d5 3.exd5 c6

Ghulam Kassim; Koch Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4

Ghulam-Kassim Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4 gxf3 6.Qxf3

Gianutio Countergambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 f5

Gianutio Counter-Gambit, KGA 1.e4 e5 2.f4 exf4 3.Bc4 f5

Gibbins-Wiedehagen Gambit Accepted 1.d4 Nf6 2.g4 Nxg4

Gibbon Gambit; Grunfeld Spike 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.g4

Giertz-Peters Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.f3

Ginsberg Gambit, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Bc4

Gipslis Variation, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 Bg4

Giraffe Attack, Vienna 1.e4 e5 2.Nc3 Bc5 3.Qg4

Giuoco 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.d3

Giuoco Piano; Italian Opening 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5

Glasscoe Gambit, Dunst 1.Nc3 f5 2.g4

Glatz Gambit; Busch-Gass Gambit 1.e4 e5 2.Nf3 Bc5

Gledhill Attack, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.Qg4

Glek Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Na6

Gligoric Variation, Ruy Lopez; C69 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O f6

Gligoric-Taimanov Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.Be3

Gloria Variation, Sicilian 1.e4 c5 2.c4 d6 3.Nc3 Nc6 4.g3 h5

Godes Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nd7

Godiva Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qb6

Goering 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.Bg5

Goering Gambit Declined, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 d5

Goering Gambit, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3

Goering 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.Ne5

Goglidze Attack 1.d4 Nf6 2.c4 g6 3.f3 d5

Goldman Variation, Caro 1.e4 c6 2.Nc3 d5 3.Qf3

Golombek Defense, English; Anti English 1.c4 Nf6 2.Nc3 d5

Gossip Variation, QP 1.d4 d5 2.Nf3 Nf6 3.Bg5 Ne4

Grand Prix Variation, Sicilian 1.e4 c5 2.Nc3 d6 3.f4

Graz Variation, Ruy 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Bc5

Great Snake, English 1.c4 g6

Greco Defense 1.e4 e5 2.Nf3 Qf6

Greco Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.f4

Greco Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 h6 6.d4 d6

Greco 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 Nxc3

Greco Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Bc5

Greco Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qe7

Greco Variation, QGA 1.d4 d5 2.c4 dxc4 3.e4 b5

Greco; 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.Nc3

Greco-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 d6

Grevo Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.cxd4

Grigorian Variation, Polish 1.b4 Nc6

Grigoriev 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.Qg4

Grigoriev 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-O

Grimm Attack, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.d4 d6 7.e5

Grinberg Gambit, Old Indian 1.d4 Nf6 2.c4 d6 3.Nc3 Bf5 4.e4

Grob Gambit 1.g4 d5 2.Bg2 Bxg4

Grob; Ahlhausen; Colibri; Fric; Genoa; Spike 1.g4

Grosshans Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Bd7

Gruenfeld Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bf5 6.Ne5 c6 7.g4

Grunfeld Defense, Veresov 1.d4 d5 2.Nc3 Nf6 3.Bg5 Nbd7 4.Nf3 g6

Grunfeld Defense; D80 1.d4 Nf6 2.c4 g6 3.Nc3 d5

Grunfeld Gambit, Tarrasch 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.dxc5 d4 7.Na4 b5

Grunfeld 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.Nbd2

Grunfeld Variation, QP 1.d4 d5 2.Nf3 Nf6 3.Bg5 g6

Guatemalan Defense 1.e4 b6 2.d4 Ba6

Gubinsky-Melts Defense, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6

Gufeld Gambit, Sicilian 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.c3 e5 6.d4

Guimard Variation, French 1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.Ngf3 Nf6 5.e5 Nfd7

Gunderam Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.g4 Bg6 6.h4

Gunderam Defense, BDG; Rook Pawn Defense 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 h5

Gunderam Gambit 1.e4 e5 2.Nf3 c6

Gunderam Gambit 1.e4 e5 2.Nf3 Qe7 3.Bc4 f5

Gunderam Gambit, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.f3

Gunderam; Tartakower Var, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bf5

Gunsberg Defense, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 c5

Gunsberg Defense, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Bb5 Nd8

Gunsberg Defense; Prianishenmo Gambit, QGA 1.d4 d5 2.c4 dxc4 3.Nc3 c5 4.d5 Nf6 5.Nc3 e6 6.e4 exd5 7.e5

Gunsberg Variation, Four Kngiths 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.a3

Gurgenidze Defense, Modern Defense 1.e4 g6 2.d4 Bg7 3.Nc3 c6 4.f4 d5 5.e5 h5

Gurgenidze System, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 g6

Gurgenidze Variation, Caro 1.e4 c6 2.d4 d5 3.Nc3 b5

Gurgenidze Variation, Caro 1.e4 c6 2.d4 d5 3.Nc3 g6 4.e5 Bg7 5.f4 h5

Gurgenidze Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.Re1 e5 6.b4

Gurgenidze Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Nf6 6.Nc3 Nxd4 7.Qxd4 d6

Gusev Countergambit, QGD 1.d4 d5 2.c4 c5 3.cxd5 Nf6

Haberditz Variation, French 1.e4 e6 2.d4 d5 3.Nd2 f5

Haberditz Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3 b5

Haberditz 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 c4

Halasz Gambit, Sicilian 1.e4 c5 2.d4 cxd4 3.f4

Halasz-Jacobsen Gambit 1.e4 e5 2.Nf3 d5 3.exd5 Bd6

Halasz-McDonnell Gambit 1.e4 e5 2.d4 exd4 3.f4

Half Giuoco Piano; Semi-Italian Opening 1.e4 e5 2.Nf3 Nc6 3.Bc4 d6

Halibut Gambit, English 1.c4 b5

Hall Variation, Center 1.e4 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qc4

Halloween Gambit, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Nxe5

Hammer Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 f6

Hammerschlag; Pork Chop Opening 1.f3 e5 2.Kf2

Hamppe Meitner, Vienna 1.e4 e5 2.Nf3 Bc5 3.Na4

Hamppe-Allgaier Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.h4 g4 6.Ng5

Hamppe-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.d4

Hamppe-Mietner Variation, Vienna 1.e4 e5 2.Nc3 Bc5 3.Na4

Hamppe-Muzio Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.Bc4 g4 6.O-O

Hanham; Hayward 1.c3 e5 2.Qc2

Hanham; Lord Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7

Hans Mullers; Vienna V 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5

Hanstein Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.O-O

Harding Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 d5 4.Nxe5 Qg5 5.Nxc6

Harksen 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.c4

Harrwitz Attack, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Be7 5.Bf4

Harrwitz; Rubinstein Var, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bf4

Hartlaub Gambit Accepted 1.d4 e6 2.c4 b6 3.Nc3 Bb7 4.e4 f5 5.exf5 Nf6

Hartlaub Gambit Declined 1.d4 e6 2.c4 b6 3.Nc3 Bb7 4.e4 f5 5.d5

Hartlaub Gambit, English 1.c4 b6 2.d4 Bb7 3.Nc3 e6 4.e4 f5 5.exf5 Nf6

Hastings 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.Qb3

Hawk Variation, Benoni 1.d4 c5 2.d5 Nf6 3.Nf3 e4

Heath Variation, KGD; Rotlewi Countergambit 1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.b4

Hector Gambit, Caro 1.e4 c6 2.Nc3 d5 3.Nf3 dxe4 4.Ng5

Hedgehog Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6 5.d4 Bd7 6.Nc3 Be7

Hedgehog Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 g6

Hedgehog Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 g6

Hedgehog Variation, Symmetrical English 1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7

Hegehog System, Anglo-Indian English; A17 1.c4 Nf6 2.Nc3 e6

Hein Countergambit, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 d5

Hekili-Loa Gambit, Owen Defense 1.e4 b6 2.d4 c5 3.dxc5 Nc6

Henneberger Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Be3

Henneberger; Swiss Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 a6

Heral Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.Bxf6

Herford Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 Qh4

Hergert Gambit #1, Trompowsky 1.d4 Nf6 2.Bg5 Ne4 3.Bh4 d5 4.f3 Nf6 5.Nc3 Bf5 6.e4

Hergert Gambit #2, Trompowsky 1.d4 Nf6 2.Bg5 Ne4 3.Bh4 c6 4.Nd2 Qa5 5.c3 Nxd2 6.Qxd2 d5 7.e4

Hergert Gambit, Trompowsky 1.d4 Nf6 2.Bg5 Ne4 3.h4 Nxg5 4.hxg5 e5

Herrstrom Gambit, Reti 1.Nf3 g5

Herzfeld; Portuguese; Vienna, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nc6

Hevendehl Gambit, Dutch 1.d4 f5 2.g4 e5

Hickmann Gambit, English 1.c4 f5 2.e4

Hickmann Gambit, English 1.c4 f5 2.e4 fxe4 3.d3

Hillbilly Attack, Caro-Kann 1.e4 c6 2.Bc4

Hinrichsen Gambit, KGD 1.e4 e5 2.f4 d5 3.d4

Hobbs Gambit, Bird 1.f4 g5

Hoffman Gambit 1.e4 e6 2.d4 d5 3.Qe2 e5 4.f4 exf4

Holloway Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Nc6

Hopton Attack, Dutch 1.d4 f5 2.Bg5

Hornung Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.Be3

Horny Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.Qxg4 Nf6 8.Qxf4

Horsefly Defense, Bird 1.f4 Nh6

Horsefly Gambit 1.d4 Nf6 2.c4 Nc6 3.d5 Ne5 4.f4

Horwitz Attack, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nb5

Horwitz Defense 1.d4 e6

Horwitz Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.Nc3 b5

Howell 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.Qe2

Hromadka Defense; Loose Gambit: A56 1.d4 Nf6 2.c4 c5

Hromadka System, Benoni 1.d4 Nf6 2.c4 c5 3.d5 d6

Hromadka Variation, Bishop 1.e4 e5 2.Bc4 Nf6 3.d3 Nc6 4.Nc3 Bb4 5.Ne2

Hubsch Gambit 1.d4 d5 2.Nc3 Nf6 3.e4 Nxe4

Huebner Deferred, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 c5

Huebner Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 Nc6 6.Nf3 Bxc3

Huebner Variation, Nimzo-Indian; E41 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5

Huebsch Gambit 1.d4 Nf6 2.Nc3 d5 3.e4 Nxe4

Hungarian Attack, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 4.Rb1

Hungarian 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 Be7

Hungarian Gambit, Catalan 1.d4 Nf6 2.c4 e6 3.g3 e5

Hungarian Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 a6

Hunt Gambit, Alekhine; Two Pawn Attack 1.e4 Nf6 2.e5 Nd5 3.c4

Hunt Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.c5

Hurst Attack, Grob 1.g4 e5 2.Bg2 d5 3.c4

Hyperaccelerated Dragon, Sicilian 1.e4 c5 2.Nf3 g6

Hyperaccelerated Pterodactyl, Sic 1.e4 c5 2.Nf3 g6 3.d4 Bg7

Iago Defense 1.d4 Nf6 2.c4 Nc6

Icelandic Defense, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Bd2 Ne7 6.f4

Icelandic-Palme Gambit, CC 1.e4 d5 2.exd5 Nf6 3.c4 e6

Ilyin-Genevsky Variation, Dutch 1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nf3 Be7 5.O-O O-O 6.c4 d6

Ilyin-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 Qe8

Improved Lisitsin G, Reti 1.Nf3 f5 2.d3

Improved Steinitz Defense, Ruy Lopez; C66 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6

Indian Defense; A45 1.d4 Nf6

Indian Opening 1.e4 e5 2.d3

Indian Variation, Larsen 1.b3 Nf6

Intermezzo Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nxc6 Qf6

Inverted Hanham Opening 1.e4 e5 2.Nf3 Nc6 3.Be2 Nf6 4.d3 d5 5.Nbd2

Irish Attack; Polish Attack 1.Nc3 e5 2.f4

Irish Gambit, QP 1.d4 d5 2.Nc3 c5

Italian 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.Bc4

Italian Variation, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bc4

Italian Variation, Four Knights Game 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Nc3 Nf6

Italian 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

Ivanchuk Defense, Caro Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Ng5 Ndf6

Ivanov Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Qb6

Jaenisch Counter-Attack, Philidor; Nimzovich Variation 1.e4 e5 2.Nf3 d6 3.d4 Nf6

Jaenisch Counterattack, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 Nf6

Jaenisch Gambit Accepted, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.exf5

Jaenisch Gambit Deferred, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 f5 5.exf5

Jaenisch Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Nf6

Jaenisch Variation, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 Qf6

Jaenisch 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.c4

Jaffe Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.c3

Jaffe Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.Bd3 e5

Jalalabad Defense 1.e4 e5 2.Nf3 c5

Jalalabad Variation, Sicilian 1.e4 c5 2.Nf3 e5

Janowski 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.Re1

Janowski Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Be3

Janowski Variation, Old Indian 1.d4 Nf6 2.c4 d6 3.Nc3 Bf5

Janowski 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.h4

Janowski Variation, QGD 1.d4 d5 2.c4 Nc6 3.Nc3 dxc4 4.Nf3

Janowski Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 a6

Janzen-Korchnoi Gambit, Dutch 1.d4 f5 2.h3 Nf6 3.g4

Jerome Gambit; Kentucky Opening 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+

John Tracy Gambit, Alekhine 1.e4 Nf6 2.Nf3

Jordansky 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.Bg5

Kadas Gambit, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 c6 4.dxc6 e5

Kadas Opening 1.h4

Kahiko-Hula Gambit, English 1.c4 e5 2.e3 Nf6 4.f4 exf4 4.Nf3

Kalashnikov Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6

Kampars Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.g4 Bg6 6.g5 Nd5 7.fxe4

Kan Formation, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 a6

Kan Line, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Nxd4 e6

Kan Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Ne2 dxe4 5.a3 Bxc3+ 6.Nxc3 Nc6

Kapengut; 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.Nd3

Karniewski; Tubingen Variation, Polish 1.b4 Nh6

Karpov 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 d4

Karpov Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.c4 Nb6 6.h3 Bg7 8.Be2

Karpov Variation, Caro-Kann; B17 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7

Kasparov Attack, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Ng3

Kasparov Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3

Kasparov-Petrosian Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3

Katalimov Variation, Sicilian 1.e4 c5 2.Nf3 b6

Kaufmann Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.c4

Kaufmann Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Bc5 5.Be3

Kaufmann Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Nf3 Bg4 6.Qe2

Kaulich Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c5

Kavalek Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Qa5

Kazakh Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Na6

Kecskemet; 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 Be8

Keene Defense, Grob 1.g4 d5 2.h3 e5

Keene Defense, KGD 1.e4 e5 2.f4 Qh4+ 3.g3 Qe7

Keene; Stean Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 O-O 6.Nd5 Re8 7.Qf5

Keidansky Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.Nf3 Nxe4 5.Qxd4

Kemeri Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5 5.cxd5 Nxd5 6.Nf3 O-O 7.O-O c5

Kemeri Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.g3

Kemeri Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.g3

Kemeri; Neo-Grunfeld 1.d4 Nf6 2.c4 g6 3.g3 d5

Kennedy Variation, Nimzovich 1.e4 Nc6 2.d4 e5

Keoni-Hiva Gambit 1.e3 d5 2.Nc3 Nf6 3.a3 e5 4.f4 exf4 5.Nf3

Keres Attack, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.Nc3

Keres Defense, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O c5 6.cxd5 Nxd5 7.Nc3 Nc6

Keres Defense, English 1.c4 e5 2.Nc3 d6 3.g3 c6

Keres 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 b6

Keres 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 Nd7

Keres Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.Bc4 Nb6 6.Bb3 Bg7 7.a4

Keres Variation, English; A23 1.c4 e5 2.Nc3 Nf6 3.g3 c6

Keres 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 Qc8

Keres Variation, KGD 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Nd2

Keres 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.h4

Keres 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

Keres 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 b6

Keres 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 b6

Keres Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6 5.Nc3

Keres Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c4

Keres 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 a5

Keres 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 Nd7

Keres, Mason, Parnu, Requena 1.e4 e5 2.f4 exf4 3.Nc3

Keres; Billium Attack, Sicilian; Chameleon 1.e4 c5 2.Ne2

Keres; 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 Be6

Keres; Panov Variation, Sicilian; B81 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g4

Keres-Parma System, English 1.c4 c5 2.Nc3 Nf6 3.Nf3 e6 4.g3 Nc6

Kevitz Defense, English 1.c4 Nf6 2.Nc3 e6 3.e4 Nc6

Kevitz 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.Re3

Khan Gambit, Bishop 1.e4 e5 2.Bc4 d5

Kholmov 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.Bc4

Kholmov 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 Be6

Kiddie Countergambit 1.e4 e5 2.Qh5 Nf6

Kiel Variation, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nb4

Kieseritzky Gambit, Bishop's Gambit, KGA 1.e4 e5 2.f4 exf4 3.Bc4 b5

Kieseritzky Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5

Kieseritzky System, Sicilian 1.e4 c5 2.Nf3 a6 3.b3

Kieseritzky; Morphy Var, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3

King David's Opening 1.e4 c5 2.Ke2

King Pawn Game; C20 1.e4 e5

King Pawn lines, Benoni; A65 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4

King 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-O

King"s Indian Attack 1.e4 e6 2.d3

Kingfisher Gambit, Dutch 1.d4 f5 2.Nc3 d5 3.e4

King's Bishop Variation, Ruy Lopez Exchange 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Bd6

King's English; A20 1.c4 e5

King's Gambit Accepted; C33 1.e4 e5 2.f4 exf4

King's Gambit Reversed 1.e4 e5 2.d3 f5

King's Gambit Reversed, Bishop 1.e4 e5 2.Bc4 f5

King's Gambit; C30 1.e4 e5 2.f4

King's Head 1.e4 e5 2.f3

King's Head Opening 1.f3 e5 2.e4

King's Head Opening 1.e4 e5 2.f3 Nf6 3.Nc3

King's Indian Attack; Reti; Zukertort; A05 1.Nf3 Nf6

King's Indian Defense; West Indian Defense; D70 1.d4 Nf6 2.c4 g6

King's Indian Defense; West Indian Defense; E60 1.d4 Nf6 2.c4 g6

King's Indian System, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 g6

King's Indian Variation 1.d4 Nf6 2.Nf3 g6 3.e3 Bg7 4.Bd3 d6

King's Knight Gambit, KGA; C34 1.e4 e5 2.f4 exf4 3.Nf3

King's Knight Opening; C40 1.e4 e5 2.Nf3

King's Knight Variation, English 1.c4 e6 2.Nf3 d5

King's Knight Variation, English 1.c4 Nf6 2.Nf3

King's Knight Variation, KID 1.d4 Nf6 2.c4 g6 3.Nf3

Kingside move order, Benoni 1.d4 c5 2.d5 Nf6 3.Nf3

Kitchner Folly, Bishop 1.e4 e5 2.Bc4 Nf6 3.d3 Be7 4.Nf3 O-O

Klein Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Bc4

Kling & Horwitz Counter-Attack, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O Qe7

Kloss 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.Kh1

Kloss Gambit, Two Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nb4

Kmoch Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.Bc4 Nb6 4.Bb3 c5 5.d3

Kmoch Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.f3

Knight Defense, QGD; D51 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7

Knight Variation, Caro 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6

Knight Variation, French 1.e4 e6 2.Nf3

Knight Variation, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3

Knights Variation, Indian Game; A46 1.d4 Nf6 2.Nf3

Knoore Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Nc3

Koch Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.e5

Koch; Ghulam Kassim Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4

Kondratiyev Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd3 c5 5.exd5 Qxd5 6.Bd2

Konikowski Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 d5

Konstantinopolsky Opening 1.e4 e5 2.Nf3 Nc6 3.g3

Koola-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-O

Kopec System, Sicilian 1.e4 c5 2.Nf3 d6 3.Bd3

Korchnoi 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.Bd2

Korchnoi Defense, Sicilian 1.e4 c5 2.Nc3 e6 3.g3 d5

Korchnoi Gambit, QGA 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Kf1

Korchnoi Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.a3

Korchnoi Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5

Korchnoi's Variation, Dutch 1.d4 f5 2.h3

Korchnoi's Variation, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.g3 Bg7 6.Bg2 e5

Kornl 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 Be7

Kostic Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Nf6 5.exf5 Bc5

Kotov Gambit 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.d4 gxf3 6.Bxf4

Kotov Gambit, Sicilian 1.e4 c5 2.Nf3 d6 3.g3 b5

Kotov Variation, Modern 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 Nc6

Kotov-Robatsch Defense 1.d4 g6 2.c4 Bg7

Kozul 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 f5

Kramer Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.Nge2

Kramnik Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Re1

Kramnik Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.c4

Kramnik'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.h3

Kramnik-Shirov Variation, English 1.c4 e5 2.Nc3 Bb4

Krause Attack, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5

Krause Gambit, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.Nxe5

Krause Variation, Dutch 1.d4 f5 2.c4 Nf6 3.Nc3 d6 4.Nf3 Nc6

Krause Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.O-O

Kraus-Muhlherr Counter Gambit 1.d4 Nf6 2.f3 d5 3.e4 e5 4.dxe5 Nxe4

Krazy Kat 1.Nh3 e5 2.f3 d5 3.Nf2

Kreijcik Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.f3 Bc5 4.Ne2 Nc6 5.b4

Krejcik Gambit 1.e4 e5 2.f3 Nf6 3.Bc4 Bc5 4.Ne2 Nc6 5.b4

Krejcik 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 Qxd4

Kupreichik 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.Bc4

Kupreichik Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bd7

Kurajica Defense, English 1.c4 e6 2.Nf3 d5 3.g3 c6

Kurajica Variation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be3

Kurkin Gambit, Two Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5 6.Bf1 h6 7.Nxf7

Kveinis Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Qb6

Labourdonnais Gambit 1.e4 e5 2.Nf3 Qf6 3.Bc4 Qg6 4.O-O

Labourdonnais Variation, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 d6 5.d4 exd4 6.cxd4 Bb6

Labourdonnais-Denker Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.b4 Bxb4 4.c3

Lamb Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Nc6

Lanc-Arnold Gambit, Center 1.e4 e5 2.d4 exd4 3.Nf3 Bc5 4.c3

Landau Gambit, Caro-Kann 1.e4 c6 2.d4 d5 3.Bd3 Nf6 4.e5 Nfd7 6.e6

Landau Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5 5.cxd5 cxd5 6.Qb3 Qc8 7.Bd2 e6 8.Na3

Lange Gambit; Alfred Lange Gambit; Simple Variation 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nxe4

Lange Variation, Evans Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bb6 5.b5 Na5 6.Nxe5 Nh6

Langeheinecke Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e3

Larobok Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Nc3 Nbd7

Larsen Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c6 7.O-O Bf5

Larsen 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 Bd6

Larsen Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 dxe5

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

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 b6

Larsen Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be3

Larsen Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Nxd4 g6

Larsen 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 c5

Larsen; Janowski; Modern Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Bg4

Larsen; Queen's Fianchetto; Nimzo-Larsen Attack A01 1.b3

Larsen-Santasiere (McDonnell Attack) Variation, Sicilian; 1.e4 c5 2.f4

Lasa Gambit 1.e4 e5 2.c3 f5

Lasker Defense, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.O-O Bb6

Lasker Defense, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 Ne4

Lasker Simul Special 1.g3 h5

Lasker Trap, QGD 1.d4 d5 2.c4 e5 3.dxe5 d4 4.e3 Bb4+ 5.Bd2 dxe3

Lasker Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5

Lasker Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bg4 6.h3

Lasker Variation, Dutch 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 g6 5.f3

Lasker Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Bxc3

Lasker Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Qe2

Lasker 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

Lasker-Pelikan Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5

Latvian Gambit Accepted 1.e4 e5 2.Nf3 f5 3.exf5

Latvian; Greco Counter-Gambit 1.e4 e5 2.Nf3 f5

Lazard Gambit, Chigorin Defense 1.d4 d5 2.c4 Nc6 3.Nf3 e5

Lazard Gambit; Maddigan Gambit 1.d4 Nf6 2.Nd2 e5

Lazy Knight Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 Nd7

Leko Gambit 1.d4 Nf6 2.c4 g6 3.f3 e5

Lemberger Counter-Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e5

Lemming Defense 1.e4 Na6

Leningrad Variation, Dutch 1.d4 f5 2.c4 Nf6 3.g3 g6

Leningrad 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.cxd4

Leningrad Variation, Nimzo-Indian; E30 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5

Leonardo (Stamma) Gambit, KGA 1.e4 e5 2.f4 exf4 3.h4

Leonhardt (Rosen) Gambit, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.b4

Leonhardt Defense, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.Nxe5 Qe7

Leonhardt Variation, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 b5

Leonhardt Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.Nc4 fxe4 5.Nc3

Leonhardt Variation, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 Nf6

Leonhardt 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 g5

Leonhardt Variation, Sicilian; B88 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6

Lesser Bishop; Tartakower 1.e4 e5 2.f4 exf4 3.Be2

Lesser 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 Bf5

Lessing Defense 1.Nf3 Nc6

Levenfish Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 b6

Levenfish Variation, Sicilian; B71 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.f4

Levenstein; Queen's Defense; Brazilian; Gunderam 1.e4 e5 2.Nf3 Qe7

Lewis Countergambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.c3 d5 4.Bxd5 Nf6

Lewis Counter-Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.c3 d5

Lewis Defense, Italian; Closed Variation 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7

Lewis Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.d4

L'Hermet Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Nd6

Lichtenhein Defense, Petroff 1.e4 e5 2.Nf3 Nf6 3.Bc4 Nxe4 4.Nc3 d5

Lilienthal 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 Nbd7

Linares Variation, QGA 1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5 Nf6 5.Nc3 b5

Linder Counter Gambit 1.d4 Nf6 2.f3 e6 3.e4 Nxe4

Linksspringer Variation, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.d5

Lion Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Nc3 Nf6

Lion's Jaw, Pirc 1.e4 d6 2.d4 Nf6 3.f3

Lipnitzky Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4

Lisbon Gambit 1.d4 d6 2.c4 e5 3.dxe5 Nc6

Lisbon Gambit, Dutch; Krejcik Gambit 1.d4 f5 2.g4

Lisitsin Gambit; Polish Gambit 1.Nf3 f5 2.e4

Lithuanian Variation, Mikenas 1.d4 Nc6 2.c4 e5 3.d5 Nce7

Lizard Defense; Pirc-Diemer Gambit 1.d4 g6 2.h4 Nf6 3.h5

Ljubojevic Line, Sicilian 1.e4 c5 2.Nf3 a6 3.c3 b5

Ljubojevic Variation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Bc4

Lobster Gambit, Latvian 1.e4 e5 2.Nf3 f5 3.g4

Locock Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Ng5 h6 5.Nxf7

Lodz; Schlecter; Rubinstein Var, QGD; D33 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3

Loehn Gambit, English 1.c4 d5 2.cxd5 e6

Lolli Attack, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.d4

Lolli Attack, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 Nxd4

Loman 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 g6

London Defense, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bb4+

London System 1.d4 Nf6 2.Nf3 e6 3.Bf4

London System, Torre Attack 1.d4 Nf6 2.Nf3 g6 3.Bf4

London System; Queen's Bishop Opening 1.d4 d5 2.Nf3 Nf6 3.Bf4

London V; New York V, Reti 1.Nf3 d5 2.c4 c6 3.b3 Nf6 4.Bg2 e6 5.Bb2 Nbd7

London Variation 1.d4 Nf6 2.Nf3 g6 3.Bf4 Bg7 4.Nbd2

Long Whip Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 h5

Lopez Counter-Gambit, Philidor 1.e4 e5 2.Nf3 d6 3.Bc4 f5

Lopez Defense, KGA 1.e4 e5 2.f4 exf4 3.Bc4 c6

Lopez Four Knights, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Nc3

Lopez Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.Qe2 Nf6 4.f4

Lopez Variation, Bishop 1.e4 e5 2.Bc4 Bc5 3.Qe2

Louma Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nxc6

Lputian Variation, French 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.a3 Nh6

Lucchini Gambit; Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 f5

Lucena Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Be7

Lundin Defense 1.d4 Nc6

Lundin Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5 Ne4 5.Nxe4 dxc3 6.Qd2 c5

Lundin; Bronstein Counter-Gambit 1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 b5

Lundin; 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 b4

Lutikov Gambit, Sicilian 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.c3 Nf6 6.d4

Lutikov Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3

Lutikov 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.Bc2

Lutikov 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.Bd2

Lutikov Variation, Ruy Lopez Exchange 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 bxc6

MacDonnell Attack, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 g5 5.Nc3 Bg7 6.d4 Ne7 7.g3

MacDonnell Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.b4

MacDonnell Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Nc3

Mackenzie Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4

Macleod Attack 1.e4 e5 2.c3

MacLeod Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 Nc6

MacLopez; Relfsson Gambit, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bb5

Mad Dog Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Bc4 Bg7 7.h4

Maddigan Gambit 1.d4 Nf6 2.Nc3 e5

Mafia Defense, KGD 1.e4 e5 2.f4 c5

Mail Line, Latvian Gambit Accepted 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4

Main Line, Benko Gambit Declined 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nf3

Main 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.Qe2

Main Line, Evans Gambit; C52 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5

Makogonov Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.b4

Makogonov Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.b4

Makogonov Variation, KID; E71 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.h3

Malaniuk 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.d5

Malkin 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

Maltese Falcon 1.d4 Nf6 2.g4 Nxg4 3.f3 Nf6 4.e4

Malvinas Variation, English 1.c4 d5 2.cxd5 Qxd5 3.Nc3 Qa5

Manhattan Gambit, Dutch 1.d4 f5 2.Qd3 Nf6 3.g4

Manhattan; Westphalia Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 Bb4

Mannheim Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Qa4+

Mao Tse Tung; Duras 1.e4 f5

Mareschall Variation, Slav; Lasker Variation 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 Na6

Margate (Vitolins) Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Bb5

Marienbad Variation 1.d4 Nf6 2.Nf3 b6 3.g3 Bb7 4.Bg2 c5

Marienbad Variation, Sicilian 1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5 5.Bb2

Mariotti Gambit 1.e4 e5 2.Nc3 Nc6 3.g3 Bc5 4.Bg2 h5 5.Nf3 h4

Maroczy Bind, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.c4

Maroczy Bind, Sicilian; B36 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4

Maroczy Defense, Pirc 1.e4 d6 2.d4 e5

Maroczy Gambit 1.e4 e5 2.Nf3 d5 3.exd5 Bd6

Maroczy Gambit, Caro-Kann 1.e4 c6 2.d4 d5 3.f3 dxe4 4.fxe4 e5 5.Nf3 exd4 6.Bc4

Maroczy 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 Na5

Maroczy Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6 7.Ne2

Maroczy Variation, Alekhine 1.e4 Nf6 2.d3

Maroczy Variation, Caro 1.e4 c6 2.d4 d5 3.f3

Maroczy Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 a6

Maroczy; Elephant Gambit 1.e4 e5 2.Nf3 d5 3.exd5 Bd6

Maroczy-Willis Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 cxd4 6.axb4 dxc3

Marshall (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 d5

Marshall C-G, KGD 1.e4 e5 2.f4 d5 3.exd5 c6

Marshall 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-O

Marshall Gambit, Nimzovich 1.e4 Nc6 2.d4 d5 3.exd5 Qxd5 4.Nc3

Marshall 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 d5

Marshall Gambit, Tarrasch 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.e4

Marshall 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 Qf5

Marshall Variation, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5

Marshall Variation, French 1.e4 e6 2.d4 d5 3.Nc3 c5

Marshall Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Bd6

Marshall Variation, Sicilian 1.e4 c5 2.b4 cxb4 3.a3

Marshall Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 d5

Masi Variation, Caro-Kann 1.e4 c6 2.d4 Nf6

Mason Attack, Queen Pawn Game 1.d4 d5 2.f4

Mason Countergambit, Latvian 1.e4 e5 2.Nf3 f5 3.d4

Mason Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 exd4 6.O-O

Mason Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.O-O O-O

Mason-Showalter Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Nc6

Massachussets Defense, Caro-Kann 1.e4 c6 2.d4 f5

Masur Gambit 1.e4 g6 2.d4 Nh6 3.Nc3 f5 4.Bxh6 Bxh6 5.exf5 O-O

Matanovic Attack, Sicilian; B82 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4

Matovinsky Gambit 1.e4 b6 2.d4 Bb7 3.Bd3 f5

Matovinsky Gambit 1.e4 b6 2.d4 Bb7 3.Bd3 f5 4.exf5 Bxg2 5.Qh5+ g6

Matsukevich Gambit, Alekhine 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Nc3 Nxc3 6.dxc3 d6 7.Bg5

Matulovic 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 Nc6

Maurian Defense, KGA 1.e4 e5 2.f4 exf4 3.Bc4 Nc6

Max Lange Attack 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Bc5 6.e5

Mayet 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.c3

Mazedonisch Variation, English 1.c4 e5 2.Nc3 Nf6 3.f4

McConnell Defense 1.e4 e5 2.Nf3 Qf6

McCutcheon Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4

McDonnell 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 e5

McDonnell Double Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.b4 Bxb4 4.f4

Mecking 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.d4

Mediterranean Defense, French 1.e4 e6 2.d4 Nf6

Medusa Gambit 1.d4 Nf6 2.c4 g5

Meitner-Mieses Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.Bc4 Bc5 4.Qg4 Qf6 5.Nd5

Mellon Gambit 1.e4 e5 2.Qh5 Nc6 3.Bc4 Nh6 4.d3 g6 5.Qf3 f6 6.Ne2 d5

Mengarini Gambit, Sicilian 1.e4 c5 2.a3

Mengarini Gambit, Sicilian 1.e4 c5 2.a3 Nc6 3.b4

Mengarini Opening 1.e4 e5 2.a3

Mengarini Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.a3

Meran Variation, QGD; D47 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4

Mestel Variation, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Qe7 5.d4 Bb6 6.Bg5

Metger 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 Nd8

Middleton Counter-Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 d6 5.O-O Bg4 6.h3 h5 7.hxg4

Mieses Defense, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O Nge7

Mieses Gambit, Caro 1.e4 c6 2.d4 d5 3.Be3

Mieses Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6

Mieses Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6

Mieses Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.g3

Mieses; Nimzovich Var, BDG 1.d4 d5 2.e4 dxe4 3.f3 Nc6

Mieses; 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 Qxd5

Miguel Gambit 1.e4 e5 2.Bb5 Bc5 3.b4

Mikenas Gambit, Alekhine 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Bc4 e6 6.Nc3 d6 7.Nxd5 exd5 8.Bxd5

Mikenas V, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.e5

Mikenas Variation, Nimzovich Defense 1.e4 Nc6 2.d4 d6

Mikenas-Carls Variation, English 1.c4 Nf6

Mikhalchishin 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.dxe5

Miladinovic Gambit, QGD 1.d4 d5 2.c4 e6 3.Nc3 Be7 4.e4 dxe4 5.f3

Miles Defense, KGD 1.e4 e5 2.f4 Nc6 3.Nf3 f5

Miles Gambit, KGD 1.e4 e5 2.f4 d5 3.exd5 Bc5

Miles 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.Bd3

Millennium Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Qg6

Milner-Barry Gambit, Caro; Rasa-Studier Gambit 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.f3

Milner-Barry Gambit, French 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3

Milner-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.Nxd4

Milner-Barry Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6 5.Nf3 d6

Milner-Barry, Zurich Variation, Nimzo-Indian; E33 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6

Minckwitz Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.dxe5

Mindeno Variation, Caro-Kann 1.e4 c6 2.Nc3 d5 3.Nf3 Bg4

Mittenberger Gambit, Modern Defense 1.e4 g6 2.d4 Bg7 3.Nc3 d5

Mlotkowski Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Nc3

Modern Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4

Modern Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6

Modern Bishop's Opening 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3

Modern Defense 1.d4 g6 2.c4 Bg7 3.Nc3 d6

Modern Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f4 Na6

Modern Defense, Neo-Grunfeld 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O dxc4

Modern Defense, QGA 1.d4 d5 2.c4 dxc4 3.e4 Nc6

Modern Defesne, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nc3 Bb4

Modern Gambit, Chigorin Defense 1.d4 d5 2.c4 Nc6 3.Nc3 Nf6 4.Nf3 dxc4

Modern Line, Slav; D11 1.d4 d5 2.c4 c6 3.Nf3

Modern Main Line, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3

Modern Paulsen, Sicilian; B84 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6

Modern 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 d6

Modern Transfer, Falkbeer Countergambit, KGD 1.e4 e5 2.f4 d5 3.exd5 exf4

Modern Variation, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.e3

Modern Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.Nd2

Modern Variation, Larsen 1.b3 e5

Modern Variation, QGD; D50 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5

Modern Variation, Sicilian; B50 1.e4 c5 2.Nf3 d6

Modern Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4

Modern; English Variation, Accelerated Panov; Caro-Kann 1.e4 c6 2.c4

Moehring Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 d5 6.Nxe5 dxe4 7.Nxc6 Qd5

Moeller (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.d5

Moeller Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Bc5

Mokele Mbembe; Knight's Tour 1.e4 Nf6 2.e5 Ne4

Mongoose Variation, Sicilian 1.e4 c5 2.Nf3 Qa5

Mongredien Defense, Pirc 1.e4 g6 2.d4 Bg7 3.Nf3 b6

Monkey's Bum, Pirc 1.e4 g6 2.Bc4 Bg7 3.Qf3 e6 4.d4

Monster Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Be7

Monte Carlo Variation, French 1.e4 e6 2.d4 d5 3.exd5 exd5 4.c4

Montevideo Defense 1.d4 Nc6 2.d5 Nb8

Monticelli Trap 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Bd2 Bxd2+ 5.Qxd2 b6 6.g3 Bb7 7.Bg2 O-O 8.Nc3 Ne4 9.Qc2 Nxc3 10.Bg5

Moody Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Qe2 Nc6 4.d4

Morgado Defense, Latvian 1.e4 e5 2.Nf3 f5 3.Bc4 Nf6

Morozevich Variation, French 1.e4 e6 2.d4 d5 3.Nd2 Be7

Morphy 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 Bc5

Morphy Defense, KGD 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Nc3 Bb4 6.Bd2 e3

Morphy Defense, Ruy Lopez; C68 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6

Morphy Defense, Ruy Lopez; C70 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4

Morphy 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.Nh3

Morphy Gambit, Philidor 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Bc4

Morphy Gambit, Sicilian 1.e4 c5 2.d4 cxd4 3.Nf3

Morris Counter-Gambit 1.d4 d5 2.Bf4 c5 3.e4 dxe4

Morris 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 c6

Mortimer Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Ne7

Moscow (Prins) Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3

Moscow 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.Bg5

Moscow Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Qg4

Moscow Variation, Sicilian; Canal Attack; B51 1.e4 c5 2.Nf3 d6 3.Bb5+

Mosquito Gambit, Englund 1.d4 e5 2.dxe5 Qh4

Motzko 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

Murey Attack, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3 c5 5.cxd5 Nxd5 6.Na4

Murey 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 Bd6

Murret Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 Nc6

Mutkin Countergambit, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.g4

Muzio-Polerio Gambit, KGA; Wild Muzio 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O

Myers Attack, Sicilian 1.e4 c5 2.h4

Myers Defense, English 1.c4 g5 2.d4 Bg7

Myers Gambit, Alekhine 1.e4 Nf6 2.Nc3 d5 3.d3 dxe4 4.Bg5

Myers Variation, Polish 1.b4 d5 2.Bb2 c6 3.a4

Nachmanson Gambit, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Nxe4 6.Nc3

Nadanian Attack 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.Na4

Najdorf Variation, Sicilian; B90 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6

Napoleon Attack 1.e4 e5 2.Qf3

Napoleon Attack, Dunst 1.Nc3 e5 2.Nf3

Napoleon Gambit, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 Nxd4 4.Nxd4 exd4 5.Bc4

Napolitano Gambit, Symmetrical English 1.c4 c5 2.Nf3 Nf6 3.b4

Naselwaus Variation, Owen's Defense 1.e4 b6 2.d4 Bb7 3.Bg5

Nei Gambit, English 1.c4 Nf6 2.Nc3 e6 3.e4 c5 4.e5 Ng8

Nenarokov 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 Ne7

Neo Catalan Accepted, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4

Neo Catalan Declined, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O

Neo Catalan, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6

Neo Orthodox Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6

Neo-Catalan, Reti 1.Nf3 d5 2.c4 e6 3.g3

Neo-Cunningham Gambit, KGA; McCormick Defense 1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Nf6

Neo-Grunfeld Defense 1.d4 Nf6 2.c4 g6 3.Nf3 d5

Neo-Modern Defense 1.d4 g6 2.c4 Bg7 3.e4 e5

Neo-Mongoloid Defense, Nimzovich 1.e4 Nc6 2.d4 f6

Neo-Orthodox Variation, QGD; D54 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Rc1

Neo-Steinitz Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 d6

Nescafe Frappe Attack, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.Nc3 axb5 6.e4 b4 7.Nb5

Netherlands Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 f5

Neumann Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nc6

Neumann Gambit, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.Bc4

New Caro-Kann 1.e4 c6 2.d4 d5 3.Nd2 g6

Nightingale 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.Qa4

Nimzo-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 Bb4

Nimzo-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.Ne5

Nimzovich Attack, French 1.e4 e6 2.d4 d5 3.e5 c5 4.Qg4

Nimzovich Attack, Latvian 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Ne3

Nimzovich Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.Nc3

Nimzovich 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.Bxc6

Nimzovich Attack; Anti-Grunfeld; Alekhine Variation 1.d4 Nf6 2.c4 g6 3.f3

Nimzovich Defense 1.e4 Nc6

Nimzovich Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 Ne5

Nimzovich Opening, Reti 1.Nf3 d5 2.b3

Nimzovich Variation, Bogo-Indian 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Bd2 Qe7

Nimzovich Variation, Dutch 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 b6

Nimzovich Variation, English 1.c4 e5 2.Nf3

Nimzovich Variation, French 1.e4 e6 2.d4 d5 3.e5 c5 4.Nf3

Nimzovich 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.Nd2

Nimzovich Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6

Nimzovich Variation, Sicilian; Nimzo-American Variation 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 d5

Nimzovich Variation, Torre Attack 1.d4 Nf6 2.Nf3 e6 3.Bg5 h6

Nimzovich; Bronstein-Larsen, Caro; B16 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ gxf6

Nimzovich; Rubinstein Var, Sicilian; B29 1.e4 c5 2.Nf3 Nf6

Nimzovich; Tarrasch Var, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Nc3

Nimzovich-Flohr Variation, English 1.c4 e5 2.Nf3 e4

Nimzovich-Marshall Variation, KGD 1.e4 e5 2.f4 d5 3.exd5 c6

Noa 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 d5

Noah'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+ Bd7

Noch Gambit, Alekhine 1.e4 Nf6 2.Nc3 d5 3.exd5

Normal Defesne, Sameisch Variation, KID; E81 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O

Normal Line, Albin Countergambit, QGD 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3

Normal 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 Bb6

Normal System, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.d4

Normal Variation, Budapest; A52 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4

Normal Variation, Dutch 1.d4 f5 2.c4 Nf6

Normal Variation, French; C10 1.e4 e6 2.d4 d5 3.Nc3

Normal Variation, Indian Game; A50 1.d4 Nf6 2.c4

Normal 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

Normal Variation, KID; E70 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4

Normal Variation, Nimzo-Indian; E46 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O

Normal Variation, Old Indian; A55 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 Nbd7 5.e4

Normal Variation, Ruy Lopez; C78 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O

Normal Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7

Normal Variation, Symmetrical English; A34 1.c4 c5 2.Nc3

Norwalde (Norwalder) Variation, KGD 1.e4 e5 2.f4 Qf6

Norwalder Gambit 1.e4 e5 2.c3 d5 3.Qh5 Bd6

Norwegian Defense 1.e4 g6 2.d4 Nf6

Noteboom Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4

Nottingham Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.Nb3

Novikov Gambit, QGA 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bc4 exd4 5.Qb3 Qe7 6.Nd2

Novosibirsk Variation, Dunst 1.Nc3 c5 2.d4 cxd4 3.Qxd4 Nc6 4.Qh4

Nuremberg Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f6

Nyholm Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d4 exd4 5.O-O

Oberndorfer 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 b6

O'Kelly Variation, Sicilian; B28 1.e4 c5 2.Nf3 a6

Olafsson 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 Qc8

Old Benoni 1.d4 c5 2.d5 d6

Old Indian Attack 1.Nf3 d5 2.d3

Old Indian Defense; Chigorin Indian Defense; A53 1.d4 Nf6 2.c4 d6

Old Line, Falkbeer Countergambit, KGD 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.Qe2

Old 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-O

Old Sicilian 1.e4 c5 2.Nf3 Nc6

Old Variation, QGA 1.d4 d5 2.c4 dxc4 3.e3

Old 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.e5

Old Zurich Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6 5.Nf3 d6 6.a3

Olland (Dutch) Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bc1

Omaha Gambit, Vienna 1.e4 e5 2.Nc3 d6 3.f4

Omega Gambit 1.d4 Nf6 2.e4

Open Defense, Catalan; E04 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3

Open System Tarrasch French; C07 1.e4 e6 2.d4 d5 3.Nd2 c5

Open Variation, Two Knights Defense; C56 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4

Opocensky Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd2

Opocensky Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.Bd2

Opocensky Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.Nc3 Ne4 7.Bd2

Opocensky Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5

Opocensky Variation, Sicilian; B92 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2

Original Defesne, Neo-Grunfeld; D78 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6

Orsini Gambit, KGA 1.e4 e5 2.f4 exf4 3.b3

Orthodox Variation, KID; E85 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5

Orthodox Variation, KID; E91 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2

Orthodox Variation, QGD; D60 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7

Orthoschapp Variation, French 1.e4 e6 2.c4 d5 3.cxd5 exd5 4.Qb3

Oshima Defense 1.d4 Nf6 2.g4 e5

Outflank Variation, Polish 1.b4 c6

Owen's Defense; Greek Defense 1.e4 b6

Oxford Gambit, Four Kngihts 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 Bb4 5.d5 Nd4

Oxford Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.d3

Ozol Variation, Dutch 1.d4 f5 2.c4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Bg5

Pachman 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.Ng5

Paleface Attack 1.d4 Nf6 2.f3

Panno Formation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 a6

Panno System 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.O-O Nc6 7.d5 Na5

Panno 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 Rb8

Panno 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 a6

Panov Attack, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Nf3 cxd4 6.exd4 d5

Panov Transfer, Center Counter 1.e4 d5 2.exd5 Nf6 3.c4 c6

Panov Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.h3

Panov 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.g4

Panov; Opatijav; Byrne Variation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bg5

Panov-Botvinnik; Gunderam Attack 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4

Panteldakis Countergambit, KGD 1.e4 e5 2.f4 f5

Papa-Ticulat Gambit, French 1.e4 e6 2.b3 d5 3.Bb2

Paris Gambit, KGA 1.e4 e5 2.f4 exf4 3.Ne2

Paris Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3

Parma 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.b4

Paschmann Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.Ne2 Nxe4 4.Nec3

Paschmann Gambit, Larsen 1.b3 e5 2.Bb2 Nc6 3.f4

Paulsen 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.Nf3

Paulsen Attack, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.Nf3

Paulsen Attack, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nc4

Paulsen Attack, Philidor 1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Nxd4 d5 5.exd5

Paulsen Attack, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Bb5

Paulsen Attack, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.fxe5 Nxe4 5.Qf3

Paulsen Counter-Gambit 1.e4 e5 2.Nf3 d5 3.exd5 e4

Paulsen Defense Deferred, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bg7

Paulsen 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.Bd2

Paulsen Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Bg7

Paulsen Defense, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d6

Paulsen Formation, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6

Paulsen Line, Sicilian 1.e4 c5 2.Nf3 a6 3.c4 e6

Paulsen Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.Bxc6

Paulsen Variation, Cozio Defense, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nge7 4.Nc3 g6

Paulsen 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 Ne7

Paulsen Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4 4.Nxd4 exd4 5.O-O Ne7

Paulsen Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nf5

Paulsen Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4

Paulsen 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 Nc6

Paulsen Variation, Vienna 1.e4 e5 2.Nc3 Nc6 3.g3

Paulsen; Anderssen C-A, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.O-O d6 6.c3 Bg4

Paulsen; Kan Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6

Pawn Push Variation 1.d4 Nf6 2.d5

Pawn Return Variation, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.b6

Pawn Storm Variation, Benoni; A66 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4

Pawn Thrust Attack, Bird 1.f4 f5 2.d4 d5

Pawn Thrust, Benoni; A44 1.d4 c5 2.d5 e5

Pelikan Variation, French 1.e4 e6 2.Nc3 d5 3.f4

Pelikan Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6

Penguin Variation, Reti 1.Nf3 d5 2.c4 d4 3.Rg1

Penrose Variation, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Bd3

Perenyi 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.g5

Perreux Variation, Two Knights Defense 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.Ng5

Perrin Variation 1.d4 e6 2.c4 b6 3.e4 Bb7 4.Bd3 Nc6

Perseus Gambit, French 1.e4 e6 2.d4 d5 3.Nf3

Peters Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 g6 6.Ne5

Petroff Defense; Russian Defense; C42 1.e4 e5 2.Nf3 Nf6

Petrosian Gambit 1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e3 b6 5.d5

Petrosian System, Grunfeld; D91 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5

Petrosian System; Czech Benoni Defense 1.d4 Nf6 2.c4 c5 3.d5 e5

Petrosian Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 Qd7

Petrosian Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5

Petrosian 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 dxc4

Petrosian Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3

Petrov's Defense, KGD 1.e4 e5 2.f4 Nf6

Pfrang Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e6 5.fxe4 Bb4 6.Bd3 Bxc3+ 7.bxc3 Nxe4 8.Be3

Philidor Counter Attack 1.e4 e5 2.Nf3 d6 3.d4 f5

Philidor Countergambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.d4 f5

Philidor Defense; C41 1.e4 e5 2.Nf3 d6

Philidor Gambit 1.e4 e5 2.d4 d6 3.dxe5 Bd7

Philidor Gambit 1.e4 e5 2.Nf3 d6 3.d4 Bd7

Philidor Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4

Philidor Gambit, Pirc 1.e4 d6 2.d4 e5 3.dxe5 Bd7

Philidor Variation, Bishop 1.e4 e5 2.Bc4 Bc5 3.c3

Pickering (Goldsmith) Defense 1.e4 h5

Picklepuss Defense 1.e4 h5 2.d4 Nf6

Pickler Gambit, KGD 1.e4 e5 2.f4 d5 3.exd5 c6 4.dxc6 Bc5

Pierce Defense, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4

Pierce Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.d4

Pietrowsky Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Nc6

Pillsbury 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.Ne5

Pillsbury 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 Ne7

Pillsbury 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.Bd3

Pillsbury 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.b3

Pillsbury Variation, Semi-Tarrasch 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.Bg5

Pilnik 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.d3

Pin Defense, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bg4

Pin Defense, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Bb4

Pin Variation; Sicilian CounterAttack 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4

Pinova Gambit 1.e4 e6 2.b4 Bxb4 3.e5

Pirc Connection, Nimzovich Defense 1.e4 Nc6 2.d4 g6

Pirc Defense 1.e4 d6 2.d4 Nf6

Pirc Variation, Nimzo-Indian; E39 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 O-O

Pirc 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 b4

Pirc; Robatsch; Modern; King Pawn Fianchetto; B06 1.e4 g6

Pirc; Ufimtsev; Antal Defense 1.e4 d6 2.d4 Nf6 3.Nc3 g6

Podebrady Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nb3

Pohlmann Variation, BDG 1.d4 d5 2.e4 dxe4 3.f3 f5

Poisoned 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 Qxb2

Poisoned Pawn Variation, French Winawer 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Qg4

Poisoned Pawn Variation, Latvian 1.e4 e5 2.Nf3 f5 3.Bc4 fxe4 4.Nxe5 Qg5 5.d4 Qxg2

Poisoned 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 Qb6

Poisoned Pawn Variation, QP 1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Qb6 5.Nc3

Poisoned 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.Qd2

Poisoned Pawn Variation, Trompowsky 1.d4 Nf6 2.Bg5 c5 3.d5 Qb6 4.Nc3

Polerio Defense, Two Knights; C58 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5

Polerio-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 Nc6

Poli Gambit 1.d4 e6 2.c4 b6 3.e4 Bb7 4.f3 f5 5.exf5 Nh6

Polish Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.f3 Bf5 5.Bg5

Polish Defense 1.d4 b5

Polish Defense 1.d4 Nf6 2.Nf3 b5

Polish G; Dalesio G; Pirc-Lisitsin G 1.Nf3 f5 2.e4 fxe4 3.Ng5

Polish Gambit, Anderssen's Opening 1.a3 a5 2.b4

Polish Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3

Polish Gambit, Sicilian 1.e4 c5 2.Nf3 b5

Polish Spike 1.b4 Nf6 2.Bb2 g6 3.g4

Polish Variation 1.e4 g6 2.d4 Bg7 3.c4 c5 4.Nf3 Qb6

Polish Variation, St George Defense 1.e4 a6 2.d4 b5 3.Nf3 Bb7 4.Bd3 e6

Polish; 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.Qg4

Polluck Gambit, Vienna 1.e4 e5 2.Nc3 Nf6 3.g3 Bc5 4.Bg2 Nc6 5.Nge2 d5 6.exd5

Polovodin Gambit, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 d5 6.cxd5 Nxd5 7.e4

Polugaevsky 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.Nh4

Polugaevsky Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Bc5

Polugaevsky; Accelerated Najdorf 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 b5

Pomar System, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.g3 O-O 6.Bg2 e5 7.Nge2

Pomar Variation, KID 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nge2

Ponomariov Gambit, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Ndb5 Qb8 7.Be3 a6 8.Bb6

Ponziani Center Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.d4

Ponziani Counter-Gambit 1.e4 e5 2.Nf3 Nc6 3.c3 f5

Ponziani; 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 Nxe4

Porcupine Variation, English 1.c4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4

Portisch Gambit, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5 5.g4

Portland Attack, Sicilian 1.e4 c5 2.Nc3 Nc6 3.d3 g6 4.g4

Portuguese Gambit, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.f3 Bf5 5.Bb5+ Nbd7

Portuguese Opening 1.e4 e5 2.Bb5

Portuguese Variation, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Bg4

Positional Variation, Exchange Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5

Potter Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nb3

Pozarek Gambit 1.d4 Nc6 2.c4 e5 3.dxe5 Nxe5 4.Nc3 Nxc4

Prague Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6

Pretzel Gambit, Dutch 1.d4 f5 2.Qd3 Nf6 3.g4

Prianishenmo Gambit, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 c5 4.d5 Nf6 5.Nc3 e6 6.e4 exd5 7.e5

Prickly 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 a6

Primitive Pillsbury Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 c5 5.Nf3 cxd4 6.Qxd4

Prins Attack, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 Bf5 4.b4

Prins Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Na6

Prokofiev Gambit, Bird 1.f4 d5 2.e4 dxe4 3.d3

Provincial Opening, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.a3 d6 5.h3

Prussian Game; Knight Attack, Two Knights; C57 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5

Przepiorka Variation; A49 1.d4 Nf6 2.Nf3 g6 3.g3

Pseudo-Austrian Attack 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4

Pseudo-Benko Gambit 1.d4 Nf6 2.Nf3 c5 3.d5 b5

Pseudo-Catalan 1.d4 d5 2.Nf3 Nf6 3.g3

Pseudo-Chigorin, QGD 1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Nf3 Nc6

Pseudo-Diemer Gambit, Dunst 1.Nc3 d5 2.e4 dxe4 3.f3 exf3 4.Qxf3

Pseudo-King's Indian Variation; A48 1.d4 Nf6 2.Nf3 g6

Pseudo-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 Nxe5

Pseudo-Meran; Semi-Slav, QGD 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6

Pseudo-Saemisch 1.d4 g6 2.c4 Bg7 3.e4 d6 4.Be3 Nf6 5.f3

Pseudo-Saemisch, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.f3

Pseudo-Slav, QGD 1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Nf3 c6

Pseudo-Spanish Variation 1.e4 Nc6 2.Bb5

Pseudo-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 c5

Pterodactyl Variation, Modern 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 c5 5.Nf3 Qa5

Pterodactyl, Pirc 1.e4 g6 2.d4 Bg7 3.Nc3 c5

Push Variation, Smith-Morra Gambit, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 d3

Pyrenees Gambit 1.d4 Nf6 2.c4 b5

Quaade; Taylor Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Nc3

Queen Attack, Baltic Defens, QGD 1.d4 d5 2.c4 Bf5 3.Nc3 e6 4.Qb3

Queen Fianchetto Variation, Sicilian 1.e4 c5 2.b3 b6

Queen Fianchetto, Queen Pawn Game 1.d4 b6

Queen Pawn Fianchetto 1.d4 g6

Queen Pawn Game; Close Opening; D00 1.d4 d5

Queen Pawn Opening; A40 1.d4

Queen's Gambit Accepted Deferred 1.d4 d5 2.Nf3 Nf6 3.c4 dxc4

Queen's Gambit Accepted; D20 1.d4 d5 2.c4 dxc4

Queen's Gambit Reversed; Krause Variation 1.d4 d5 2.Nf3 c5

Queen's Gambit; Aleppo Gambit; D06 1.d4 d5 2.c4

Queen's Indian Defense; E12 1.d4 Nf6 2.c4 e6 3.Nf3 b6

Queen's Indian Defense; Saemisch-Indian 1.d4 Nf6 2.c4 b6

Queen's Indian Formation, English 1.c4 Nf6 2.Nc3 e6 3.Nf3 b6

Queen's Knight Defense, KGD 1.e4 e5 2.f4 Nc6

Queen's Knight Variation, Dutch 1.d4 f5 2.c4 Nf6 3.Nc3

Queen's Knight Variation, QGD; D31 1.d4 d5 2.c4 e6 3.Nc3

Queen's Knight, French 1.e4 e6 2.Nc3

Queen's Pawn Counter-Gambit; Elephant Gambit 1.e4 e5 2.Nf3 d5

Quelle Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 Bc5 4.fxe5 d6

Quiet Line, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nd2

Quiet Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3

Quiet Line, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.b3

Quiet System, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.d3

Quiet System, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2

Quiet Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.Nbd2

Quiet Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3

Quinteros Variation, Sicilian 1.e4 c5 2.Nf3 Qc7

Radisch Gambit 1.e4 e5 2.d3 Nf6 3.f4 Bc5

Ragozin Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 d5

Ragozin 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 dxc4

Ragozin Variation, Nimzo-Indian; E51 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5

Ragozin Variation, QGD; D38 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Bb4

Randspringer Variation 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 f5

Ranken Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 a6 5.Bxc6

Raphael Variation, Dutch 1.d4 f5 2.Nc3

Raptor Variation, Trompowsky 1.d4 Nf6 2.Bg5 Ne4 3.h4

Rasa-Studier Gambit, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Be3

Rasa-Studier Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e6 4.Be3

Rasmussen Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nge2

Rauzer Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Qb3

Rauzer 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.a4

Rauzer Variation, Sicilian; B63 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2

Regan Variation 1.g3 d5 2.Bg2 e5 3.d4

Reifir-Spielmann Line, Caro-Kann 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qb6

Rellstab Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.dxe5 Nxe4 5.Qd5

Requena 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 Qa5

Reshevsky Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2

Reshevsky Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nge2

Reshevsky Variation, QGD; D36 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 c6 6.Qc2

Reti (Charousek) Variation, KGD 1.e4 e5 2.f4 d5 3.exd5 e4 4.d3

Reti (Horwitz) Variation, French 1.e4 e6 2.b3

Reti Gambit Accepted 1.Nf3 d5 2.c4 dxc4

Reti Polonaise 1.Nf3 d5 2.c4 d4 3.b4

Reti System, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.g3

Reti 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.Na4

Reti Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4

Reti; Landstrasser G; Wolf G; A09 1.Nf3 d5 2.c4

Reti; Zukertort; A04 1.Nf3

Reti-Spielmann Attack, French 1.e4 e6 2.g3

Retreat Line, Mindeno Variation, Caro-Kann 1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 4.h3 Bh5

Retreat Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nc8

Retreat Variation, Sicilian 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Nf3

Retreat; Brooklyn Variation, Alekhine 1.e4 Nf6 2.e5 Ng8

Reuter Gambit, French 1.e4 e6 2.f4 d5 3.Nf3 dxe4 4.Ng5

Reversed Alekhine 1.g3 e5 2.Nf3

Reversed Chigorin Defense 1.d4 Nf6 2.Nc3 c5

Reversed Closed Sicilian, English; A25 1.c4 e5 2.Nc3 Nc6

Reversed Dragon, English 1.c4 e5 2.Nc3 Nf6 3.g3 d5

Reversed Mexican Defense, Reti 1.Nf3 d5 2.Nc3

Reversed Nimzovich 1.Nc3 e5

Reversed Philidor, French 1.e4 e6 2.d3 d5 3.Nd2 Nf6 4.Ngf3 Nc6 5.Be2

Reversed Rat 1.d3 e5

Reversed Sicilian, English; A21 1.c4 e5 2.Nc3

Reversed Spanish, Vienna 1.e4 e5 2.Nc3 Nf6 3.Bc4 Bb4

Reynolds 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 a6

Reynolds 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 d5

Rice 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 Bxe5

Rice 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-O

Richardson 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.Nxe5

Richter Gambit, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 Nb8 5.f3

Richter Variation, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 g6

Richter Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6 6.d4

Richter Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.d5

Richter Variation, Veresov 1.d4 d5 2.Nc3 Nf6 3.Bg5 Bf5 4.f3

Richter-Rauzer Variation, Sicilian; B60 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5

Richter-Veresov Opening; D01 1.d4 d5 2.Nc3 Nf6 3.Bg5

Riemann Defense, Nimzovich Defense 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.f4 Nc6

Riga Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 exd4

Ringelbach Gambit, Larsen 1.b3 e5 2.Bb2 f5 3.e4

Rio de Janeiro Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7

Rio Gambit Accepted, Ruy Lopez; C67 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4

Ritter 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 Be7

Rivadavia Gambit, Sicilian 1.e4 c5 2.d4 cxd4 3.c3

Riviere Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Nxg4 d5

Robatsch Line, Sicilian 1.e4 c5 2.Nf3 a6 3.c4 d6

Romanishin Gambit, English 1.c4 e6 2.Nf3 Nf6 3.g3 a6 4.Bg2 b5

Romanishin Variation, English 1.c4 Nf6 2.Nf3 e6 3.g3 a6

Romanishin Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 Bxc3

Romanishin Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.g3 O-O 6.Bg2

Romanishin Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Nf3 Qf5

Romanishin 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.Bg5

Romanishin 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 Nc6

Romanovsky 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 f5

Romanovsky 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.d3

Romford Counter-Gambit, Grob 1.g4 d5 2.Bg2 Bxg4 3.c4 d4

Romi Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Bd3 Bb4

Roscher Gambit, Pirc 1.e4 d6 2.d4 Nf6 3.Nf3

Rosen 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.d4

Rosenthal Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 e6

Rosenthal Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 a6

Rosenthal Variation, Three Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 g6 4.d4 exd4 5.Nd5

Rosenthal; Stockwhip Var, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Qe7

Rosentreter Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d4

Rosentreter Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4

Rosentreter-Testa Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 g4 5.Bxf4

Ross Gambit, Center 1.e4 e5 2.d4 exd4 3.Bd3

Rossolimo (Nezmetdinov) Variation, Sicilian; B30 1.e4 c5 2.Nf3 Nc6 3.Bb5

Rossolimo Variation 1.d4 g6 2.c4 Bg7 3.e4 d6 4.Nf3 Bg4

Rossolimo Variation, Modern Defense 1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.c4 Bg4

Rotary-Albany Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 b6

Rotterdam 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 f5

Ruban Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 Rb8

Rubinstein Attack, Colle 1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3 c5 5.b3

Rubinstein 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.Qc2

Rubinstein Countergambit, KGD 1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.c3 f5

Rubinstein Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Nd4

Rubinstein Variation, Blumenfeld 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.e4

Rubinstein Variation, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Bf4

Rubinstein Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.exd5 cxd3 4.Bd3 Nc6 5.c3 Nf6 6.Bf4

Rubinstein Variation, Dutch 1.d4 f5 2.c4 e6 3.Nc3

Rubinstein Variation, French 1.e4 e6 2.d4 d5 3.Nc3 dxe4

Rubinstein Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Qd2

Rubinstein Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.d4

Rubinstein Variation, Nimzo-Indian; E40 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3

Rubinstein Variation, Nimzo-Indian; E42 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2

Rubinstein 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.Qc2

Rubinstein Variation, QGA 1.d4 d5 2.c4 dxc4 3.e4 c5

Rubinstein Variation, QGA; D27 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6

Rubinstein Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6

Rubinstein Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 6.d5 exd5 7.Nh4

Rubinstein Variation, Symmetrical English 1.c4 c5 2.Nc3 Nf6 3.g3 d5 4.cxd5 Nxd5 5.Bg2 Nc7

Rubinstein; anti-Meran 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Ne5

Rubinstein; 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-O

Ruisdonk Gambit, French 1.e4 e6 2.d4 d5 3.e5 c5 4.Nf3 cxd4 5.Bd3

Russian Defense, Ruy Lopez; C79; Lasker Defense 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d6

Russian Gambit, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.e4

Russian Three Knights Var, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nc3

Russian Variation, Grunfeld; D96 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3

Ruy Lopez; Spanish Opening; C60 1.e4 e5 2.Nf3 Nc6 3.Bb5

Rydel-Bloodgood Gambit 1.Nf3 f5 2.e4 exf4 3.Ne5

Ryder Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3

Saduleto Variation, QGA; Central Variation, QGA 1.d4 d5 2.c4 dxc4 3.e4

Saemisch Attack, Alekhine 1.e4 Nf6 2.e5 Nd5 3.Nc3

Saemisch Deferred, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.a3

Saemisch 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.a3

Saemisch Variation, Nimzo-Indian; E26 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3

Saemisch Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Nf3 Nbd7 6.Bf4

Saemisch Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5

Salvio Countergambit, QGD 1.d4 d5 2.c4 c5 3.dxc5 d4

Salvio 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.b4

San Jorge Variation 1.e4 a6 2.d4 b5 3.Nf3 Bb7 4.Bd3 d6 5.O-O g6 6.c3 Bg7

San Jorge Variation 1.e4 a6 2.d4 e6

San 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 e5

San 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 Nxc5

San 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 b5

Santa Maria Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nf6

Santasiere Wing Gambit, Sicilian 1.e4 c5 2.b4 cxb4 3.c4

Santasiere's Folly, Reti 1.Nf3 d5 2.b4

Santassiere Variation, KID 1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.b4

Saragossa; Hempel's Opening 1.c3

Sarratt Attack 1.d4 d5 2.Bf4

Sarratt Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.O-O gxf3 6.Qxf3 Qf6

Sawyer's Gambit, Ruy Lopez; Spanish Countergambit 1.e4 e5 2.Nf3 Nc6 3.Bb5 d5

Scandanavian Formation, Smith-Morra, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 d5

Scandanavian Variation, Alekhine 1.e4 Nf6 2.Nc3 d5

Scandanavian Variation, Nimzovich Defense 1.e4 Nc6 2.d4 d5

Scandinavian Variation, KGA; Modern Defense, KGA; C36 1.e4 e5 2.f4 exf4 3.Nf3 d5

Schallop Defense, KGA 1.e4 e5 2.f4 exf4 3.Nf3 Nf6

Schallopp Defense, Slav; D12 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5

Schara-Hennig; Duisburg Gambit, QGD 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4

Scheveingen Variation, Sicilian; B80 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6

Scheveningen Formation, Smith-Morra Accepted 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6

Scheveningen 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 Bxb4

Schiller-Pytel Variation, Center Counter 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 c6

Schlechter Defense, Center 1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 d5

Schlechter Defense, Nimzo-Indian; E52 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 b6

Schlechter 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 Nxd4

Schlechter Variation, French 1.e4 e6 2.d4 d5 3.Bd3

Schlechter Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6

Schlechter Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 c6

Schlechter Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.Nc3

Schlechter Variation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.h3

Schlechter 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 d5

Schlechter Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 g6

Schlechter Variation, Three Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Bb4 4.Nd5 Nf6

Schlenker Defense, Benoni 1.d4 c5 2.dxc5 Na6

Schliemann Defense Deferred, Ruy 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 f5

Schliemann; Jaenisch Var, Ruy Lopez; C63 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5

Schmid Gambit, Four Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nxd4 Nxe4

Schmid Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Nb6

Schmid Variation, Benoni 1.d4 c5 2.d5 d6 3.Nc3 g6

Schmidt Attack, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 f5 4.d4 d6 5.d5

Schmidt Var; Scotch Four Knights 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nc3

Schnepper Gambit 1.d4 Nf6 2.Nf3 b6 3.c3 e5

Schoenemann Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.d4

Schofman Variation, Sicilian 1.e4 c5 2.Nc3 Nc6 3.f4 g6 4.Nf3 Bg7 5.Bc4 e6 6.f5

Schubert Variation, KGD 1.e4 e5 2.f4 Qf6 3.Nc3 Qxf4 4.d4

Schuhler Gambit, Polish 1.b4 c6 2.Bb2 a5 3.b5 cxb5 4.e4

Schulder Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 d6 4.b4

Schulen Defense, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 exd4 7.O-O b5

Schultz Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7 5.h4 h6 6.d4 d6 7.Qd3

Schulz Gambit, English 1.c4 d5 2.cxd5 Nf6

Schurig Gambit, KGA 1.e4 e5 2.f4 exf4 3.Bb5

Schuttler Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Nbd7

Schwarz's Line, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd2 Ne7 5.Nb1

Scippler Gambit, Center 1.e4 e5 2.d4 exd4 3.Nf3 Bc5 4.c3 dxc3 5.Bc4

Scorpion-Horus Gambit, Caro-Kann 1.e4 c6 2.Nc3 d5 3.d3 dxe4 4.Bg5

Scotch Gambit 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4

Scotch Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O

Scotch Game 1.e4 e5 2.Nf3 Nc6 3.d4

Seirawan Attack 1.d4 Nf6 2.c4 e6 3.Bg5

Seirawan 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.Qxd3

Semi-Averbakh System, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Be3

Semi-Leningrad Variation, Dutch 1.d4 f5 2.g3 Nf6 3.Bg2 g6

Semi-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 dxc4

Semi-Tarrasch Variation, QGD; D40 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5

Semmering Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.Nbd2 Nbd7 6.Bd3 c5

Senechaud Counter-Gambit, KGD 1.e4 e5 2.f4 Bc5 3.Nf3 g5

Senechaud Gambit, Latvian 1.e4 e5 2.Nf3 f5 3.b4

Seneschaud Gambit, Dutch 1.d4 f5 2.Bf4 e6 3.g4

Seneschaud Variation, Dutch 1.d4 e6 2.Bf4 f5 3.g4

Seville 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

Shabalov Attack, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.g4

Shannon Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Bb7 7.Ng5 d5

Shaposhnikov Gambit, French 1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 Nf6

Sharp 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.e4

Sharp Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 Nb6

Shaviliuk Gambit, QP 1.d4 d5 2.Nc3 e5

Sherbakov Attack, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2 cxd4 6.exd4 O-O 7.c5

Sherbakov 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 b6

Sherzer Variation, Sicilian 1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.d4 e6 5.Nf3 Nc6

Shilling (Kostic) Gambit, Italian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4

Shirazi Shove 1.c4 Nf6 2.g3 h5

Shocron Gambit, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c5 5.d5 b5

Short Spike, Grob 1.g4 d5 2.Bg2 c6 3.h3

Short Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3

Showalter Variation, QGA; D24 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3

Shropshire Defense 1.d4 d5 2.Nc3 h5

Siberian Attack 1.d4 d5 2.Qd3 Nc6 3.Nc3

Sicilian Center Game 1.e4 c5 2.d4 cxd4

Sicilian Defense; B20 1.e4 c5

Sicilian Fred 1.e4 c5 2.Nf3 g6 3.d4 f5

Siesta Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 f5

Silberschmidt Variation, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.Ne5 Qh4+ 6.Kf1 Nh6

Simagin (Byrne) Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Nc6

Simagin 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.Qe2

Simagin Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O Bg4

Simagin 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 Ba6

Simagin Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 Nc6 7.O-O Bg4

Simagin Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 d5 6.a3 Bd6

Simagin Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nge2 d5 6.a3 Bd6

Simagin 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.Nh4

Six 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.h4

Six Pawns Attack, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6

Skipworth Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Re1 d5

Slav Bishop's Game 1.d4 d5 2.c4 c6 3.Nf3 Bf5

Slav Defense; Czech Defense, QGD; D10 1.d4 d5 2.c4 c6

Slav Fianchetto 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Nf6 5.Nc3 g6

Slav Gambit, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 b5

Slav Pawn Game 1.d4 d5 2.c4 c6 3.e3

Slav Stonewall, Dutch 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5

Slow Sicilian 1.e4 c5 2.Be2

Slow Variation, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.O-O

Small Center Defense 1.e4 d6 2.d4 e6

Small Center Variation, Pirc 1.e4 g6 2.d4 Bg7 3.Nf3 d6 3.Nc3 e6

Smith Gambit, Owen Defense 1.e4 b6 2.d4 Bb7 3.Nf3

Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3

Smith-Morra Line, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.c3

Smith-Morra; Fleissig Gambit, Sic 1.e4 c5 2.d4 cxd4 3.c3

Smyslov Defense, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nxc3

Smyslov Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Ng5 e6 7.Qe2 Nb6

Smyslov 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 Bd6

Smyslov Variation, English 1.c4 e5 2.Nc3 d6 3.Nf3 Bg4

Smyslov Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd3 c6 7.O-O Bg4

Smyslov Variation, Grunfeld; D98 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4

Smyslov Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Bg5

Smyslov Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.Bg5

Smyslov 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 Qe7

Smyslov 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 Qe7

Smyslov Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 g6

Smyslov 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 h6

Smyslov Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Na6

Snagkeouss Defense 1.e4 a5 2.d4 Nc6

Snail Variation, Benoni 1.d4 c5 2.d5 Na6

Snake Variation, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 Bd6

Sneiders Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Qh5

Snyder Variation, Sicilian 1.e4 c5 2.b3

Soerensen Defense, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 g5

Soerensen Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Nc3

Sokolov'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.Re1

Sokolsky 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 Ba6

Sokolsky Variation, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.Bg5

Sokolsky 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.d5

Sokolsky Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.dxe5 Nxe4 5.Nbd2

Soller Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Bf5 4.f3 Nf6 5.Bc4

Soller Gambit Deferred 1.d4 e5 2.dxe5 Nc6 3.Nf3 f6

Soller; Lemberger Var, BDG; Diemer Attack 1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Be3

Soller; 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.Bc4

Soller-Zilbermints Gambit, KGD 1.e4 e5 2.f4 f6 3.fxe5 Nc6

Somov Gambit, QGA 1.d4 d5 2.c4 dxc4 3.e4 e5 4.Bxc4

Sorensen Defense, Center 1.e4 e5 2.d4 exd4 3.c3 d5

Sorensen Gambit, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg4 5.Ne5

Sosonko Variation, Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.a4

Sosonko 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 Nd7

Soultanbeieff Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 e6

Soviet Youth Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Nd4 5.O-O

Sozin 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 b5

Sozin 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

Sozin; Velimirovic Attack, Sicilian; B57 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4

Spanish 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.d5

Spanish Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 a6

Spanish Four Knights Game; C48 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5

Spanish Variation, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Bb5

Spanish Wing Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.b4

Spassky Gambit, Polish Defense 1.d4 b5 2.e4 Bb7 3.Bxb5

Spassky System, QID; E14 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3

Spassky Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O Bf5

Spassky 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 c5

Spassky 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.Nxd4

Sperling Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.d5

Spielmann Attack, Bishop 1.e4 e5 2.Bc4 Nf6 3.d3 Bc5 4.Nc3

Spielmann Defense, Symmetrical English; A32 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6

Spielmann Gambit, Dutch 1.d4 f5 2.Nc3 Nf6 3.g4

Spielmann Variation, Alekhine 1.e4 Nf6 2.Nc3 d5 3.e5 Nfd7 4.e6

Spielmann Variation, Blumenfeld 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.Bg5 exd5 6.cxd5 h6

Spielmann Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 O-O

Spielmann Variation, Nimzo-Indian; E22 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3

Spielmann Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Nde2

Spielmann-Indian 1.d4 Nf6 2.Nf3 c5

Spike Deferred 1.g4 g6 2.d3

Spike Deferred; Myers Spike Attack 1.d3 g6 2.g4

Spike Variation, Larsen 1.b3 Nf6 2.Bb2 g6 3.g4

Spike, Grob 1.g4 d5 2.Bg2 c6 3.g5

St George; Birmingham; Baker 1.e4 a6

St George's Gambit 1.d4 a6 2.c4 b5 3.e4 e6 4.cxb5 axb5

St 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.Nbd2

St. George Defense, Dunst 1.Nc3 a6

St. Petersburg Variation, Nimzo-Indian; E43 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6

Stafford Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 Nc6

Stahlberg 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.g3

Stahlberg 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-O

Stahlberg 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 axb5

Stanley Variation, Vienna; C27 1.e4 e5 2.Nc3 Nf6 3.Bc4

Staunton Defense; Benoni C-G; A43 1.d4 c5

Staunton Gambit Accepted, Dutch 1.d4 f5 2.e4 fxe4

Staunton Gambit, Dutch; A82 1.d4 f5 2.e4

Staunton Line, KGD; C32 1.e4 e5 2.f4 d5 3.exd5 e4

Staunton 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 c6

Staunton-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 a5

Stein Gambit, Bishop 1.e4 e5 2.Bc4 Bc5 3.f4

Steiner Attack, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Bg5

Steiner Line, Sicilian 1.e4 c5 2.Nf3 a6 3.c3 d6

Steiner Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.b3

Steiner Variation, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 4.Qc2

Steiner 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.g3

Steiner Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 c6 5.O-O Be7 6.dxe5

Steiner 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 e4

Steiner Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bg4

Steinitz Attack, French 1.e4 e6 2.e5

Steinitz Countergambit, Queen Pawn Game 1.d4 d5 2.Bf4 c5

Steinitz Defense Deferred; Ruy Lopez; C71 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6

Steinitz Defense, Ruy Lopez; C62 1.e4 e5 2.Nf3 Nc6 3.Bb5 d6

Steinitz Defense, Three Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 g6

Steinitz Gambit, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4

Steinitz Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5

Steinitz Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.f4

Steinitz Variation, Petoff; C43 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.d4

Steinitz Variation, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 f6

Steinitz Variation, QGA 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O cxd4

Steinitz Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4 5.Nc3

Steinitz Variation, Vienna 1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.d3

Steinitz; Pulling Variation, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Qh4

Steinitz; Tartakower, Lasker-Dunne Variation, Sicilian 1.e4 c5 2.g3

Stockholm Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bg5

Stockhom Variation, Englund Gambit 1.d4 e5 2.dxe5 Nc6 3.Nf3 Qe7 4.Qd5

Stoltz Attack, Sicilian 1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.Nf3 Nc6 5.Bc4 Nb6 6.Bb3

Stoltz Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Nbd7 6.Qc2

Stonewall Attack 1.d4 d5 2.e3 Nf6 3.Bd3 c5 4.c3

Stonewall Attack, Queen Pawn Game 1.d4 d5 2.e3 Nf6 3.Bd3

Stonewall Defense, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3 Ne4 6.Bd3 f5

Stonewall Variation, Dutch 1.d4 f5 2.c4 e6 3.Nc3 Nf6 4.g3 c6 5.Bg2 d5 6.O-O Bd6

Stone-Ware Defense, Evans Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Bd6

Strautins Gambit, Latvian 1.e4 e5 2.Nf3 f5 3.Bc4 b5

Studier 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.Qe1

Studier-Rasa Gambit, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Be3

Stummer Gambit 1.d4 Nf6 2.g4 Nxg4 3.e4 d6 4.Be2 Nf6 5.Nc3

Sturm; Mujannah 1.f4 d5 2.c4

Suchting Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.Bc4

Suchting Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 Qb6

Suetin 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.a3

Suetin 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.a3

Suhle 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 h6

Suttles Variation, Modern Defense 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3 c6

Svenius Variation, French 1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nc3 Nf6 5.Bg5

Svenonius Defense, Center 1.e4 e5 2.d4 exd4 3.c3 Ne7

Svenonius 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 d5

Svenonius Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.exd5

Svenonius Variation, KGD 1.e4 e5 2.f4 Bc5 3.Nf3 d6 4.Nc3 Nf6 5.Bc4 Nc6 6.d3 Bg4

Sveshnikov 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.h3

Swiss (Retreat) Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Ba5

Swiss Cheese Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 g6

Swiss Gambit, Bird 1.f4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4

Swiss Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bd3

Swiss; Wagner Gambit 1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e4

Symmetrical 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 Bf5

Symmetrical Variation, 4 Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.O-O O-O 6.d3 d6

Symmetrical Variation, Larsen 1.b3 b6

Symmetrical Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4 d5

Symmetrical Variation, QP 1.d4 d5 2.Nf3 Nf6

Symmetrical Variation, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7

Symmetrical Variation, Tarrasch 1.d4 d5 2.c4 e6 3.Nc3 c5 4.e3 Nf6 5.Nf3 Nc6

Szabo (Boleslavsky) Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 c6

Szabo Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.O-O e5

Szen Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5

Taimanov Formation, Smith-Morra Accepted, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Bc4 a6 6.Nf3 Ne7

Taimanov 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.Nd4

Taimanov Line, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Nxd4 e5

Taimanov 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.Bb5

Taimanov Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7

Taimanov Variation, Nimzo-Indian 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 Nc6

Taimanov Variation, Sicilian 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be2 Nge7

Taimanov; Bastrikov, Paulsen Variation, Sicilian; B44 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6

Tal Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.e5 Ne4 5.Bb5

Tal Gambit, Sicilian 1.e4 c5 2.f4 d5 3.exd5 Nf6

Tal Variation, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 Bf5 4.h4

Tal Variation, Modern Variation, Benoni; A60 1.d4 Nf6 2.c4 c5 3.d5 e6

Tal Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.f4 Nc6 7.Be3 Be7 8.Qf3

Tamarkin Countergambit, Benoni 1.d4 c5 2.Nf3 cxd4 3.b4 e5

Tarrasch (Alekhine) Gambit, Caro 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Bd3

Tarrasch Defense, Catalan 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 c5 5.Nf3 Nc6

Tarrasch Defense, QGD; D32 1.d4 d5 2.c4 e6 3.Nc3 c5

Tarrasch Gambit, QGD 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.dxc5 d4 6.Na4 b5

Tarrasch 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-O

Tarrasch Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.Bd3

Tarrasch Variation, French; C03 1.e4 e6 2.d4 d5 3.Nd2

Tarrasch 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 Bg4

Tarrasch; Open Variation, Ruy Lopez; C80 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4

Tartakower Attack, Evans 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4 d6 7.Qb3

Tartakower Defense, QGD 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 c5

Tartakower Gambit, QGD 1.d4 d5 2.c4 Nc6 3.Nc3 e5

Tartakower 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 d5

Tartakower 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 Qc8

Tartakower Variation, Caro 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6

Tartakower Variation, Dutch 1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4

Tartakower Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Nfd7

Tartakower Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ne4

Tartakower Variation, Hungarian 1.e4 e5 2.Nf3 Nc6 3.Bc4 Be7 4.d4 exd4 5.c3 Nf6 6.e4 Ne4

Tartakower Variation, QGD; D58 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 b6

Tartakower Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 fxe4 5.Nxe4 Nf6

Tartakower 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.Nd2

Tartakower Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.c3

Tartakower-Indian 1.d4 Nf6 2.c4 d6 3.Nf3 Bg4

Tashkent Attack, KGA 1.e4 e5 2.f4 exf4 3.Nf3 Nf6 4.e5 Nh5 5.g4

Tate Gambit, Dutch 1.d4 f5 2.g4 fxg4 3.e4 d5 4.Nc3

Tautvaisis Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Qxf3 Nc6

Taylor Opening; Inverted Hungarian 1.e4 e5 2.Nf3 Nc6 3.Be2

Teichmann Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4

Teichmann Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.h4 f6

Teichmann 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.Qc2

Tejler Attack, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5 5.Bf4

Tejler 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.Bd3

Tennison G; Lemberg G; Abonyi G 1.Nf3 d5 2.e4

Therkatz-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 Ne7

Thorold Attack, KGA 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ng5 h6 6.Nxf7 Kxf7 7.d4

Thorold Gambit 1.e4 e5 2.Bc4 b5 3.Bxb5 f5

Three Knights Opening; C46 1.e4 e5 2.Nf3 Nc6 3.Nc3

Three Knights System, English; A27 1.c4 e5 2.Nc3 Nc6 3.Nf3

Three Knights Variation, Grunfeld; D90 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3

Three Knights Variation, Nimzo-Indian; E21 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3

Three Knights Variation, QGD; D37 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3

Three Knights Variation, Slav; D15 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3

Three Knights Variation, Vienna; C28 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nc6

Three Pawn Attack, St George 1.e4 a6 2.d4 e6 3.c4

Three Pawns Attack 1.e4 g6 2.d4 Bg7 3.f4

Thuring Gambit; Hartlaub-Charlick Gambit 1.d4 e5 2.dxe5 d6

Tiers Counter-Gambit 1.e4 f5

Timman's Line, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Qb3

Tiviakov Defense, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Na6

Tiviakov-Fischer Attack, Caro-Kann 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Nxf6+ Nxf6

Tolush 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 Qxg2

Tomalty Gambit, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nf6 5.Nc3 c5

Torre Attack 1.d4 Nf6 2.Nf3 e6 3.Bg5

Torre Attack 1.d4 Nf6 2.Nf3 b6 3.Bg5

Torre Attack, QP; D03 1.d4 d5 2.Nf3 Nf6 3.Bg5

Tortoise Opening 1.e4 e5 2.Bd3

Traditional Closed Sicilian 1.e4 c5 2.Nc3 Nc6

Traditional System QGA; D26 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6

Traditional Variation, KGA; C38 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7

Traditional Variation, QGD 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Bg5

Traditional Variation, QID; E17 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7

Trajkovic Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 Bb7

Transpositional Variation, Keres Defense 1.d4 e6 2.c4 Bb4+ 3.Nc3

Traxler; Wilkes-Barre Var, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5

Trencianske-Teplice Gambit, Two Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5 5.Bxf7+ Ke7 6.d4

Treybel; Flohr; Exchange Var Deferred 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Bxc6

Trifunovic Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 Bf5

Trifunovic Variation, Petroff 1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5 5.Nxe5 Bd6 6.O-O O-O 7.c4 Bxe5

Trifunovic Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Be7 6.Qe2 d5

Trifunovic 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 Bb4

Troger Variation, English 1.c4 e5 2.Nc3 d6 3.g3 Be6 4.Bg2 Nc6

Troger Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Be6

Trompowsky; Opocensky; Ruth Opening 1.d4 Nf6 2.Bg5

Tubingen Gambit, Dunst 1.Nc3 Nf6 2.g4

Tumbleweed; King's Own, KGA 1.e4 e5 2.f4 exf4 3.Kf2

Two Knight Variation, French 1.e4 e6 2.Nc3 d5 3.Nf3

Two Knight Variation, Modern Defense 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3

Two Knights Attack, Caro Kann 1.e4 c6 2.Nc3 d5 3.Nf3

Two Knights Attack, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4

Two Knights Defense; C55 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6

Two Knights Line, Symmetrical English; A37 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3

Two 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.Nf3

Two Knights Variation, Caro 1.e4 c6 2.Nf3 d5 3.Nc3

Two Knights Variation, English 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4

Two Knights Variation, English; A22 1.c4 e5 2.Nc3 Nf6

Two Knights Variation, French 1.e4 e6 2.Nf3 d5 3.Nc3

Two Knights Variation, Old Indian; A54 1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3

Two 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.Nf3

Twyble Attack, Dunst 1.Nc3 c5 2.Rb1

Ueberlinger Gambit 1.d4 Nf6 2.g3 e5

Uhlmann Variation, Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Bg5

Uhlmann Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.Nf3 h6 6.Bh4 O-O 7.Rc1 dxc4

Uhlmann-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 e5

Ukranian Defense, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O a5

Ukranian Variation 1.d4 Nf6 2.c4 d6 3.Nc3 e5

Ultra-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 cxd5

Ulvestad Variation, 2 Knights 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5

Ulvestad 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

Ulysses Gambit, Caro 1.e4 c6 2.d4 d5 3.Nf3 dxe4 4.Ng5

Unzicker Attack, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.e5

Urosov Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Bc4

Urusov 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.d4

Urusov Gambit, Petroff 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.d4 exd4 4.Bc4

Urusov; Ouroussoff; Keidansky G 1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.Nf3

Van der Wiel Attack, Caro-Kann 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nc3

Van Geet; Kevitz; Trajkovic; Mexican 1.d4 Nf6 2.c4 Nc6

Van't Kruijs Opening 1.e3 e5

Vehre Variation, Nimzovich Defense 1.e4 Nc6 2.d4 d5 3.Nc3 Nf6

Velimirovic Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 Be7 8.Qe2

Venezolana 1.d3 c5 2.Nc3 Nc6 3.g3

Venice 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.c3

Veresov Variation, QP 1.d4 d5 2.Nc3 Nf6 3.Bg5 Bf5 4.Bxf6

Versov; Betbeder; Schwartz Defense, QGA 1.d4 d5 2.c4 dxc4 3.e4 f5

Vienna Gambit 1.e4 e5 2.Nc3 Nc6 3.f4

Vienna Gambit, Vienna; C29 1.e4 e5 2.Nc3 Nf6 3.f4

Vienna Hybrid, Bishop 1.e4 e5 2.Bc4 Nf6 3.d3 Nc6 4.Nc3

Vienna Variation, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6

Vienna Variation, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Qb3

Vienna 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 dxc4

Vienna Variation, Semi-Slav 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 dxc4

Vienna; Hamppe Opening; C25 1.e4 e5 2.Nc3

Vinken System, Sicilian; Grand Prix Attack 1.e4 c5 2.Nc3 Nc6 3.f4

Vinogradov Var, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Qe7

Vistaneckis (Nimzovich) Variation, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ng8

Vitolins 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 b5

Vitzhum Attack, Scotch 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.Ng5 Nh6 6.Qh5

Von Beivorseen 1.d4 Nf6 2.Nc3 c5 3.dxc5

Von der Lasa Gambit 1.e4 e5 2.d4 exd4 3.Bc4

Von Hennig Gambit, Caro 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Bc4

Von Hennig Gambit, QGD 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4 5.Qxd4 Nc6 6.Qd1 exd5 7.Qxd5 Be6

Von Popiel Gambit 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.Bg5

Vukovic Gambit, Ponziani 1.e4 e5 2.Nf3 Nc6 3.c3 Nf6 4.d4 Nxe4 5.d5 Bc5

Vulture Defense, Benoni 1.d4 c5 2.d5 Nf6 3.c4 Ne4

Vulture Variation; Der Geier 1.d4 Nf6 2.c4 c5 3.d5 Ne4

Wade Defense 1.Nf3 d6

Wade Defense 1.d4 d6 2.Nf3 Bg4

Wade Gambit, English 1.c4 f5 2.g4

Wade Variation, French 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Qb6 5.Nf3 Bd7

Wade 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 Bb7

Wagner Variation, Tarrasch 1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Bg4

Walker (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.d4

Walkerling 1.e4 e5 2.f3 Nf6

Wall Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.d4 c5

Waller 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.Qb3

Ware Defense 1.e4 a5

Ware Gambit 1.a4 e5 2.a5 d5 3.e3 f5 4.a6

Ware; Meadow Hay; Crab 1.a4

Warsaw Gambit, Bishop 1.e4 e5 2.Bc4 Nf6 3.d4 exd4 4.c3

Warsaw 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 c6

Wasp Variation 1.e4 e5 2.Nf3 d5 3.Nxe5 dxe4 4.Bc4 Qg5

Wayward Queen; Danvers; Parnham 1.e4 e5 2.Qh5

Weber Gambit 1.e4 e5 2.d3 d5 3.exd5 c6 4.dxc6 Nxc6

Webster Gambit 1.d4 Nf6 2.f3 c5 3.d5 e6 4.e4 exd5 5.e5

Weenink Variation, Benoni 1.d4 Nf6 2.c4 c5 3.dxc5 e6

Weinsbach Declination, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 e6

Weiss Defense, KGA 1.e4 e5 2.f4 exf4 3.Be2 f5 4.exf5 d6

Weiss Variation, Pirc 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3

Welling Variation, Alekhine 1.e4 Nf6 2.e5 Nd5 3.b3

Welling Variation, Queen Pawn Game 1.d4 d5 2.Bg5 Bg4

Westerinen Line, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4 Nd6 6.Bxc6 dxc6 7.dxe5 Ne4

Westermann Gambit 1.e4 g6 2.d4 Bg7 3.Bd2

Westphalian Variation, QGD 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 Bb4 6.Nf3 c5

Whale Opening 1.e4 e5 2.c4

Wheeler Gambit, Nimzovich Defense 1.e4 Nc6 2.b4 Nxb4 3.c3 Nc6 4.d4

Wiesbaden Variation, Slav 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 e6

Wiesengren Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bc5

Wikstrom Gambit, Budapest 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Nbc6

Wild Bull Defense 1.e4 Nh6

Wild 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.Nc3

Williams Variation, Nimzovich 1.e4 Nc6 2.Nf3 d6

Wimpy 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-O

Winawer Counter Gambit, Slav 1.d4 d5 2.c4 c6 3.Nc3 e5

Winawer Defense, Three Knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 f5

Winawer 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.a3

Wind Gambit 1.e4 g6 2.d4 Bg7 3.Bd3

Wind Gambit, Owen Defense 1.e4 b6 2.d4 Bb7 3.f3 e5

Wing Attack, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Be7 7.a4

Wing Formation, Smith-Morra Declined, Sicilian 1.e4 c5 2.d4 cxd4 3.c3 Qa5

Wing Gambit Deferred, Sicilian 1.e4 c5 2.Nf3 e6 3.b4

Wing Gambit Deferred, Sicilian 1.e4 c5 2.Nf3 d6 3.b4

Wing Gambit, Center Counter 1.e4 d5 2.exd5 Nf6 3.d4 g6 4.c4 b5

Wing Gambit, French 1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4

Wing Gambit, Sicilian 1.e4 c5 2.b4

Wing Gambit, Sicilian 1.e4 c5 2.Nf3 a6 3.b4

Wing Gambit, Ware Opening 1.a4 b5

Wing Variation, English 1.c4 c5 2.b4

Wing; Carlsbad Variation, Sicilian 1.e4 c5 2.b4 cxb4 3.a3 bxa3

Wolf Gambit, French 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.Nge2

Wolferts Gambit, Polish 1.b4 e5 2.Bb2 c5

Woodchuck Variation, St George 1.e4 a6 2.d4 Nc6

Woozle Defense, Benoni 1.d4 c5 2.d5 Nf6 3.Nc3 Qa5

Wormald Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Qe2

Worrall Attack, Ruy Lopez; C86 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2

Wulumulu 1.h4 e5 2.d4

Wurzburger 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.Nf4

Yankovich 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.Nfd2

Yates Defense, KID; E83 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6

Yates Variation, QID 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 a5

Yates 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.d4

Yates Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bd3

Yefimov Gambit, QGA 1.d4 d5 2.c4 dxc4 3.e4 c5 4.d5 b5

Yepishin'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.Qc2

Yerevan System, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.Nc3

Young 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 Qf6

Young 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.Be3

Yugoslav 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-O

Yugoslav Variation 1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 c5

Yugoslav 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 c5

Yugoslav Variation, KID; E64 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.g3 O-O 6.Bg2 c5

Yusupov-Rubinstein System 1.d4 Nf6 2.Nf3 e6 3.e3

Zagoriansky 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.a4

Zagorovsky Line, O'Kelly Sicilian 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Qxd4

Zagreb Variation, Sicilian; B91 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3

Zaire Defense 1.d4 Nc6 2.d5 Nb8 3.e4 Nf6 5.e5 Ng8

Zaitsev Gambit, Grunfeld 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.h4

Zaitsev 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 Re8

Zaitsev 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.Bc4

Zaitsev Variation, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.O-O Nd4 5.b4

Zaitsev Variation, Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Qd7

Zeller Defesne, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Bf5

Zeller 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 Nf6

Zhuravlev Counter-Gambit, Vienna 1.e4 e5 2.Nc3 Bb4 3.Qg4

Ziegler; Gunderam's 2nd Defense, BDG 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c6

Zilbermints Double Countergambit; KGD 1.e4 e5 2.f4 g5

Zilbermints Double Gambit I, KGD 1.e4 e5 2.f4 Nc6 3.Nf3 g5

Zilbermints Gambit 1.d4 e6 2.c4 e5

Zilbermints Gambit II, Englund Gambit 1.d4 e5 2.dxe5 Nc6 3.Nf3 h6

Zilbermints 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.Kh1

Zilbermints Gambit, Borg 1.e4 g5 2.d4 e5

Zilbermints Gambit, Carr Defense 1.e4 h6 2.d4 e5

Zilbermints Gambit, Center Counter 1.e4 d5 2.b4

Zilbermints Gambit, English 1.c4 g5 2.d4 e5

Zilbermints Gambit, Englund Gambit 1.d4 e5 2.dxe5 Nc6 3.Nf3 Nge7

Zilbermints Gambit, Grob 1.g4 d5 2.e4

Zilbermints Gambit, QGD 1.d4 d5 2.c4 b5

Zilbermints Gambit, St George Defense 1.e4 a6 2.d4 e5

Zilbermints Gambit; Nakamura Gambit, Benoni 1.d4 c5 2.b4 cxb4

Zilbermints 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 b5

Zilbermints-Benoni Gambit 1.d4 c5 2.Nf3 cxd4 3.b4

Zinnowitz Variation, KID 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Bg5

Zollner 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 Qb6

Zot 1.d4 d5 2.Bg5

Zukertort Defense, Vienna 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2 d5

Zukertort Gambit, Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.O-O Nf6 5.c3

Zukertort Variation, Philidor 1.e4 e5 2.Nf3 d6 3.d4 f5 4.Nc3

Zukertort Variation, QP 1.d4 d5 2.Nf3 Nf6 3.e3 e6 4.Bd3

Zukertort Variation, QP; D02 1.d4 d5 2.Nf3

Zukertort 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.c4

Zukertort 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 Ne7

Zurich Gambit 1.d4 d5 2.g4

Zviagintsev-Krasenkov Attack, English 1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4 4.g4