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==B – Semi-Open Games other than the French Defence== * 1.e4 without 1...c5, 1...e6 or 1...e5 (B00–B19) * 1.e4 c5: [[Sicilian Defence]] (B20–B99) ===B00–B19=== 1.e4 without 1...c5, 1...e6 or 1...e5 '''B00''' [[King's Pawn Game|King's Pawn Opening]] without 1...e5, 1...e6, 1...d5, 1...Nf6, 1...g6, 1...d6, 1...c6, 1...c5. *King's Pawn Game: 1.e4 *Ware Defense: 1.e4 a5 *Ware Defense: Snagglepuss Defense: 1.e4 a5 2.d4 Nc6 *St. George Defense: 1.e4 a6 *St. George Defense: San Jorge Variation: 1.e4 a6 2.d4 b5 3.Nf3 Bb7 4.Bd3 d6 5.0-0 g6 6.c3 Bg7 *St. George Defense: Polish Variation: 1.e4 a6 2.d4 b5 3.Nf3 Bb7 4.Bd3 e6 *St. George Defense: Zilbermints Gambit: 1.e4 a6 2.d4 e5 *Owen Defense: 1.e4 b6 *Guatemala Defense: 1.e4 b6 2.d4 Ba6 *Owen Defense: Matovinsky Gambit: 1.e4 b6 2.d4 Bb7 3.Bd3 f5 4.exf5 Bxg2 5.Qh5+ g6 *Owen Defense: Naselwaus Gambit: 1.e4 b6 2.d4 Bb7 3.Bg5 *Owen Defense: Wind Gambit: 1.e4 b6 2.d4 Bb7 3.f3 e5 *Owen Defense: Smith Gambit: 1.e4 b6 2.d4 Bb7 3.Nf3 *Owen Defense: Hekili-Loa Gambit: 1.e4 b6 2.d4 c5 3.dxc5 Nc6 *Pirc Defense: 1.e4 d6 *Pirc Defense: 1.e4 d6 2.d4 *Rat Defense: Antal Defense: 1.e4 d6 2.d4 Nd7 *Pirc Defense: 1.e4 d6 2.d4 Nf6 *Lion Defense: Lion's Jaw: 1.e4 d6 2.d4 Nf6 3.f3 *Pirc Defense: Roscher Gambit: 1.e4 d6 2.d4 Nf6 3.Nf3 *Rat Defense: Harmonist: 1.e4 d6 2.f4 *Rat Defense: Fuller Gambit: 1.e4 d6 2.f4 d5 3.exd5 Nf6 *Rat Defense: Spike Attack: 1.e4 d6 2.g4 *Rat Defense: Petruccioli Attack: 1.e4 d6 2.h4 *Duras Gambit: 1.e4 f5 *Barnes Defense: 1.e4 f6 *Owen Defense: Unicorn Variation: 1.e4 f6 2.d4 b6 3.c4 Bb7 *Fried Fox Defense: 1.e4 f6 2.d4 Kf7 *Borg Defense: 1.e4 g5 *Borg Defense: Borg Gambit: 1.e4 g5 2.d4 Bg7 *Borg Defense: Zilbermints Gambit: 1.e4 g5 2.d4 e5 *Borg Defense: Troon Gambit: 1.e4 g5 2.d4 h6 3.h4 g4 *Goldsmith Defense: 1.e4 h5 *Goldsmith Defense: Picklepuss Defense: 1.e4 h5 2.d4 Nf6 *Carr Defense: 1.e4 h6 *Carr Defense: Zilbermints Gambit: 1.e4 h6 2.d4 e5 *Lemming Defense: 1.e4 Na6 *Nimzowitsch Defense: 1.e4 Nc6 *Nimzowitsch Defense: Wheeler Gambit: 1.e4 Nc6 2.b4 *Nimzowitsch Defense: Pseudo-Spanish Variation: 1.e4 Nc6 2.Bb5 *Nimzowitsch Defense: 1.e4 Nc6 2.d4 *Nimzowitsch Defense: Woodchuck Variation: 1.e4 Nc6 2.d4 a6 *Nimzowitsch Defense: Scandinavian Variation: 1.e4 Nc6 2.d4 d5 *Nimzowitsch Defense: Hornung Gambit: 1.e4 Nc6 2.d4 d5 3.Be3 *Nimzowitsch Defense: Scandinavian Variation, Advance Variation: 1.e4 Nc6 2.d4 d5 3.e5 *Nimzowitsch Defense: Scandinavian Variation, Aachen Gambit: 1.e4 Nc6 2.d4 d5 3.exd5 Nb4 *Nimzowitsch Defense: Scandinavian Variation, Exchange Variation: 1.e4 Nc6 2.d4 d5 3.exd5 Qxd5 *Nimzowitsch Defense: Scandinavian Variation, Exchange Variation, Marshall Gambit: 1.e4 Nc6 2.d4 d5 3.exd5 Qxd5 4.Nc3 *Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation: 1.e4 Nc6 2.d4 d5 3.Nc3 *Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Brandics Gambit: 1.e4 Nc6 2.d4 d5 3.Nc3 a6 *Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation: 1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 *Van Geet Opening: Berlin Gambit: 1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 *Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Richter Gambit: 1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 Nb8 5.f3 *Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Nimzowitsch Gambit: 1.e4 Nc6 2.d4 d5 3.Nc3 dxe4 4.d5 Ne5 *Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Heinola-Deppe Gambit: 1.e4 Nc6 2.d4 d5 3.Nc3 e5 *Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Erben Gambit: 1.e4 Nc6 2.d4 d5 3.Nc3 g6 *Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Vehre Variation: 1.e4 Nc6 2.d4 d5 3.Nc3 Nf6 *Nimzowitsch Defense: Mikenas Variation: 1.e4 Nc6 2.d4 d6 *Nimzowitsch Defense: Kennedy Variation: 1.e4 Nc6 2.d4 e5 *Nimzowitsch Defense: Kennedy Variation, Linksspringer Variation: 1.e4 Nc6 2.d4 e5 3.d5 *Nimzowitsch Defense: Kennedy Variation, Bielefelder Gambit: 1.e4 Nc6 2.d4 e5 3.dxe5 Bc5 *Nimzowitsch Defense: Kennedy Variation, de Smet Gambit: 1.e4 Nc6 2.d4 e5 3.dxe5 d6 *Nimzowitsch Defense: Kennedy Variation, Hammer Gambit: 1.e4 Nc6 2.d4 e5 3.dxe5 f6 *Nimzowitsch Defense: Kennedy Variation, Riemann Defense: 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.f4 Nc6 *Nimzowitsch Defense: Kennedy Variation, Main Line: 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.f4 Ng6 *Nimzowitsch Defense: Kennedy Variation, Keres Attack: 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.Nc3 *Nimzowitsch Defense: Kennedy Variation, Paulsen Attack: 1.e4 Nc6 2.d4 e5 3.dxe5 Nxe5 4.Nf3 *Nimzowitsch Defense: Kennedy Variation, Herford Gambit: 1.e4 Nc6 2.d4 e5 3.dxe5 Qh4 *Nimzowitsch Defense: Neo-Mongoloid Defense: 1.e4 Nc6 2.d4 f6 *Nimzowitsch Defense: French Connection: 1.e4 Nc6 2.Nc3 e6 *Nimzowitsch Defense: Pirc Connection: 1.e4 Nc6 2.Nc3 g6 *Nimzowitsch Defense: Breyer Variation: 1.e4 Nc6 2.Nc3 Nf6 3.d4 e5 *Nimzowitsch Defense: Declined Variation: 1.e4 Nc6 2.Nf3 *Nimzowitsch Defense: Williams Variation: 1.e4 Nc6 2.Nf3 d6 *Nimzowitsch Defense: Franco-Nimzowitsch Variation: 1.e4 Nc6 2.Nf3 e6 *Nimzowitsch Defense: Colorado Countergambit: 1.e4 Nc6 2.Nf3 f5 *Nimzowitsch Defense: Colorado Countergambit Accepted: 1.e4 Nc6 2.Nf3 f5 3.exf5 *Nimzowitsch Defense: El Columpio Defense: 1.e4 Nc6 2.Nf3 Nf6 3.e5 Ng4 *Nimzowitsch Defense: El Columpio Defense, Pin Variation: 1.e4 Nc6 2.Nf3 Nf6 3.e5 Ng4 4.d4 d6 5.h3 Nh6 6.Bb5 *Nimzowitsch Defense: El Columpio Defense, El Columpio Gambit: 1.e4 Nc6 2.Nf3 Nf6 3.e5 Ng4 4.d4 d6 5.h3 Nh6 6.e6 *Nimzowitsch Defense: El Columpio Defense, Exchange Variation: 1.e4 Nc6 2.Nf3 Nf6 3.e5 Ng4 4.d4 d6 5.h3 Nh6 6.exd6 *Hippopotamus Defense: 1.e4 Nh6 *Hippopotamus Defense: 1.e4 Nh6 2.d4 g6 3.c4 f6 '''B01''' [[Scandinavian Defence]] (Center Counter Defence): 1...d5 (without 2.Nf3 ([[Tennison Gambit]], A06)) *Scandinavian Defense: 1.e4 d5 *Scandinavian Defense: 1.e4 d5 2.b3 *Scandinavian Defense: Zilbermints Gambit: 1.e4 d5 2.b4 *Scandinavian Defense: Blackburne-Kloosterboer Gambit: 1.e4 d5 2.exd5 c6 *Scandinavian Defense: Kloosterboer Gambit: 1.e4 d5 2.exd5 c6 3.dxc6 e5 *Scandinavian Defense: Blackburne Gambit: 1.e4 d5 2.exd5 c6 3.dxc6 Nxc6 *Scandinavian Defense: Boehnke Gambit: 1.e4 d5 2.exd5 e5 3.dxe6 Bxe6 *Scandinavian Defense: Modern Variation: 1.e4 d5 2.exd5 Nf6 *Scandinavian Defense: Panov Transfer: 1.e4 d5 2.exd5 Nf6 3.c4 c6 *Scandinavian Defense: Icelandic-Palme Gambit: 1.e4 d5 2.exd5 Nf6 3.c4 e6 *Scandinavian Defense: Modern Variation: 1.e4 d5 2.exd5 Nf6 3.d4 *Scandinavian Defense: Portuguese Gambit: 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 *Scandinavian Defense: Portuguese Gambit, Elbow Variation: 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.Bb5+ c6 *Scandinavian Defense: Portuguese Gambit, Lusophobe Variation: 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.Bb5+ Nbd7 5.Be2 *Scandinavian Defense: Portuguese Gambit, Wuss Variation: 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.Be2 *Scandinavian Defense: Portuguese Gambit, Jadoul Variation: 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.f3 Bf5 5.Bb5+ Nbd7 6.c4 *Scandinavian Defense: Portuguese Gambit, Melbourne Shuffle Variation: 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.f3 Bf5 5.Bb5+ Nbd7 6.Nc3 *Scandinavian Defense: Portuguese Gambit, Banker Variation: 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.f3 Bf5 5.c4 *Scandinavian Defense: Portuguese Gambit, Correspondence Refutation: 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.f3 Bf5 5.g4 *Scandinavian Defense: Portuguese Gambit, Classical Variation: 1.e4 d5 2.exd5 Nf6 3.d4 Bg4 4.Nf3 *Scandinavian Defense: Kádas Gambit: 1.e4 d5 2.exd5 Nf6 3.d4 c6 4.dxc6 e5 *Scandinavian Defense: Richter Variation: 1.e4 d5 2.exd5 Nf6 3.d4 g6 *Scandinavian Defense: Modern Variation, Wing Gambit: 1.e4 d5 2.exd5 Nf6 3.d4 g6 4.c4 b5 *Scandinavian Defense: Marshall Variation: 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 *Scandinavian Defense: Kiel Variation: 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.c4 Nb4 *Scandinavian Defense: Modern Variation, Gipslis Variation: 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 Bg4 *Scandinavian Defense: Richter Variation: 1.e4 d5 2.exd5 Nf6 3.d4 Nxd5 4.Nf3 g6 *Scandinavian Defense: Mieses-Kotroc Variation: 1.e4 d5 2.exd5 Qxd5 *Scandinavian Defense: Main Line: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 *Scandinavian Defense: Main Line, Leonhardt Gambit: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.b4 *Scandinavian Defense: Anderssen Counterattack: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5 *Scandinavian Defense: Anderssen Counterattack, Orthodox Attack: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5 5.dxe5 Nc6 6.Nf3 Bb4 7.Bd2 *Scandinavian Defense: Anderssen Counterattack, Goteborg System: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5 5.Nf3 *Scandinavian Defense: Anderssen Counterattack, Collijn Variation: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 e5 5.Nf3 Bg4 *Scandinavian Defense: Main Line, Mieses Variation: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 *Scandinavian Defense: Classical Variation: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bf5 *Scandinavian Defense: Grünfeld Variation: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bf5 6.Ne5 c6 7.g4 *Scandinavian Defense: Lasker Variation: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d4 Nf6 5.Nf3 Bg4 6.h3 *Scandinavian Defense: Gubinsky-Melts Defense: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 *Scandinavian Defense: Schiller-Pytel Variation: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 c6 *Scandinavian Defense: Schiller-Pytel Variation, Modern Variation: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 Nf6 5.Bc4 c6 6.Nge2 Bf5 7.Bf4 Qb4 *Scandinavian Defense: Bronstein Variation: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd6 4.d4 Nf6 5.Nf3 a6 *Scandinavian Defense: Valencian Variation: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd8 *Scandinavian Defense: Valencian Variation, Main Line: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd8 4.d4 Nf6 5.Nf3 Bg4 *Scandinavian Defense: Valencian Variation, Ilundain Variation: 1.e4 d5 2.exd5 Qxd5 3.Nc3 Qd8 4.d4 Nf6 5.Nf3 c6 *Van Geet Opening: Grünfeld Defense: 1.e4 d5 2.Nc3 dxe4 3.Nxe4 e5 '''B02''' [[Alekhine's Defence]]: 1.e4 Nf6 *Alekhine Defense: 1.e4 Nf6 *Alekhine Defense: Krejcik Variation: 1.e4 Nf6 2.Bc4 *Alekhine Defense: Krejcik Variation, Krejcik Gambit: 1.e4 Nf6 2.Bc4 Nxe4 3.Bxf7+ *Alekhine Defense: Maróczy Variation: 1.e4 Nf6 2.d3 *Alekhine Defense: Normal Variation: 1.e4 Nf6 2.e5 Nd5 *Alekhine Defense: Welling Variation: 1.e4 Nf6 2.e5 Nd5 3.b3 *Alekhine Defense: Kmoch Variation: 1.e4 Nf6 2.e5 Nd5 3.Bc4 Nb6 4.Bb3 c5 5.d3 *Alekhine Defense: Two Pawns Attack: 1.e4 Nf6 2.e5 Nd5 3.c4 *Alekhine Defense: Two Pawns Attack, Tate Variation: 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.a4 *Alekhine Defense: Steiner Variation: 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.b3 *Alekhine Defense: Two Pawns Attack, Lasker Variation: 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 *Alekhine Defense: Hunt Variation, Lasker Simul Gambit: 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Bc4 e6 6.Nc3 *Alekhine Defense: Two Pawns Attack, Mikenas Variation: 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Bc4 e6 6.Nc3 d6 *Alekhine Defense: Hunt Variation, Mikenas Gambit: 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Bc4 e6 6.Nc3 d6 7.Nxd5 exd5 8.Bxd5 *Alekhine Defense: Hunt Variation, Matsukevich Gambit: 1.e4 Nf6 2.e5 Nd5 3.c4 Nb6 4.c5 Nd5 5.Nc3 Nxc3 6.dxc3 d6 7.Bg5 *Alekhine Defense: The Squirrel: 1.e4 Nf6 2.e5 Nd5 3.c4 Nf4 *Alekhine Defense: Buckley Attack: 1.e4 Nf6 2.e5 Nd5 3.Na3 *Alekhine Defense: Sämisch Attack: 1.e4 Nf6 2.e5 Nd5 3.Nc3 *Alekhine Defense: Mokele Mbembe: 1.e4 Nf6 2.e5 Ne4 *Alekhine Defense: Mokele Mbembe, Vavra Defense: 1.e4 Nf6 2.e5 Ne4 3.d4 e6 *Alekhine Defense: Mokele Mbembe, Modern Line: 1.e4 Nf6 2.e5 Ne4 3.d4 f6 *Alekhine Defense: Brooklyn Variation: 1.e4 Nf6 2.e5 Ng8 *Alekhine Defense: Brooklyn Variation, Everglades Variation: 1.e4 Nf6 2.e5 Ng8 3.d4 f5 *Alekhine Defense: Scandinavian Variation: 1.e4 Nf6 2.Nc3 d5 *Alekhine Defense: Scandinavian Variation, Myers Gambit: 1.e4 Nf6 2.Nc3 d5 3.d3 dxe4 4.Bg5 *Alekhine Defense: Spielmann Gambit: 1.e4 Nf6 2.Nc3 d5 3.e5 Nfd7 4.e6 *Alekhine Defense: Scandinavian Variation, Geschev Gambit: 1.e4 Nf6 2.Nc3 d5 3.exd5 c6 '''B03''': 1.e4 Nf6 2.e5 Nd5 3.d4 (including the Exchange Variation and Four Pawns Attack) *Alekhine Defense: 1.e4 Nf6 2.e5 Nd5 3.d4 *Alekhine Defense: O'Sullivan Gambit: 1.e4 Nf6 2.e5 Nd5 3.d4 b5 *Alekhine Defense: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 *Alekhine Defense: Balogh Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Bc4 *Alekhine Defense: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 *Alekhine Defense: Hunt Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.c5 *Alekhine Defense: Exchange Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.exd6 *Alekhine Defense: Exchange Variation, Voronezh Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.exd6 cxd6 6.Nc3 g6 7.Be3 Bg7 8.Rc1 0-0 9.b3 *Alekhine Defense: Exchange Variation, Karpov Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.exd6 cxd6 6.Nc3 g6 7.h3 Bg7 8.Nf3 0-0 9.Be2 Nc6 10.0-0 Bf5 11.Bf4 *Alekhine Defense: Four Pawns Attack: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 *Alekhine Defense: Four Pawns Attack, Trifunovic Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 Bf5 *Alekhine Defense: Four Pawns Attack, Korchnoi Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 Bf5 7.Nc3 e6 8.Nf3 Be7 9.Be2 0-0 10.0-0 f6 *Alekhine Defense: Four Pawns Attack, Main Line: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 Nc6 7.Be3 *Alekhine Defense: Four Pawns Attack, Tartakower Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 Nc6 7.Be3 Bf5 8.Nc3 e6 9.Nf3 Qd7 10.Be2 0-0-0 11.0-0 Be7 *Alekhine Defense: Four Pawns Attack, Ilyin-Zhenevsky Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 dxe5 6.fxe5 Nc6 7.Nf3 Bg4 8.e6 fxe6 9.c5 *Alekhine Defense: Four Pawns Attack, Cambridge Gambit: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 g5 *Alekhine Defense: Four Pawns Attack, Fianchetto Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.f4 g6 *Alekhine Defense: Modern Variation, Alekhine Gambit: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.Nf3 Bg4 6.Be2 '''B04''': 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 (Modern Variation without 4...Bg4) *Alekhine Defense: Modern Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 *Alekhine Defense: Modern Variation, Larsen Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 dxe5 *Alekhine Defense: Modern Variation, Alburt Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 *Alekhine Defense: Modern Variation, Keres Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.Bc4 Nb6 6.Bb3 Bg7 7.a4 *Alekhine Defense: Modern Variation, Schmid Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Nb6 *Alekhine Defense: Modern Variation, Larsen-Haakert Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Nc6 '''B05''': 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 (Modern Variation with 4...Bg4) *Alekhine Defense: Modern Variation, Main Line: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 *Alekhine Defense: Modern Variation, Flohr Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.Be2 c6 *Alekhine Defense: Modern Variation, Alekhine Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.c4 *Alekhine Defense: Modern Variation, Vitolins Attack: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.c4 Nb6 6.d5 *Alekhine Defense: Modern Variation, Panov Variation: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.h3 '''B06''' [[Robatsch Defence|Robatsch (Modern) Defence]], including [[Monkey's Bum]] *Pterodactyl Defense: Eastern, Benoni: 1.d4 g6 2.e4 Bg7 3.Nc3 c5 4.d5 *Pterodactyl Defense: Eastern, Benoni Pterodactyl: 1.d4 g6 2.Nc3 Bg7 3.e4 c5 4.d5 Qa5 *Modern Defense: 1.e4 g6 *Modern Defense: Bishop Attack, Monkey's Bum: 1.e4 g6 2.Bc4 Bg7 3.Qf3 e6 4.d4 Bxd4 *Modern Defense: 1.e4 g6 2.d4 Bg7 *Modern Defense: Bishop Attack: 1.e4 g6 2.d4 Bg7 3.Bc4 *Modern Defense: Bishop Attack, Bücker Gambit: 1.e4 g6 2.d4 Bg7 3.Bc4 b5 *Modern Defense: Westermann Gambit: 1.e4 g6 2.d4 Bg7 3.Bd2 *Modern Defense: Wind Gambit: 1.e4 g6 2.d4 Bg7 3.Bd3 *Pterodactyl Defense: Central, Benoni Quetzalcoatlus: 1.e4 g6 2.d4 Bg7 3.c4 c5 4.d5 d6 5.Nc3 Qa5 *Pterodactyl Defense: Central, Anhanguera: 1.e4 g6 2.d4 Bg7 3.c4 c5 4.Nc3 d6 5.Be3 Qa5 *Pterodactyl Defense: Central, Quetzalcoatlus Gambit: 1.e4 g6 2.d4 Bg7 3.c4 c5 4.Nc3 d6 5.dxc5 Qa5 *Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation Declined: 1.e4 g6 2.d4 Bg7 3.c4 c5 4.Nf3 d6 5.Be2 Qa5+ *Modern Defense: Dunworthy Variation: 1.e4 g6 2.d4 Bg7 3.c4 d5 4.exd5 c6 5.dxc6 Bxd4 *Modern Defense: Three Pawns Attack: 1.e4 g6 2.d4 Bg7 3.f4 *Pterodactyl Defense: Austrian, Pteranodon: 1.e4 g6 2.d4 Bg7 3.f4 c5 4.c3 Qa5 *Pterodactyl Defense: Austrian, Austriadactylus Western: 1.e4 g6 2.d4 Bg7 3.f4 c5 4.Nf3 Qa5+ *Pterodactyl Defense: Fianchetto, Rhamphorhynchus: 1.e4 g6 2.d4 Bg7 3.g3 c5 4.dxc5 Qa5+ *Pterodactyl Defense: Fianchetto, King Pterodactyl: 1.e4 g6 2.d4 Bg7 3.g3 c5 4.Nf3 Qa5+ *Modern Defense: Standard Line: 1.e4 g6 2.d4 Bg7 3.Nc3 *Modern Defense: Mongredien Defense, with Nc3: 1.e4 g6 2.d4 Bg7 3.Nc3 b6 *Modern Defense: Modern Pterodactyl: 1.e4 g6 2.d4 Bg7 3.Nc3 c5 *Pterodactyl Defense: Eastern, Anhanguera: 1.e4 g6 2.d4 Bg7 3.Nc3 c5 4.Be3 *Pterodactyl Defense: Eastern, Benoni Pteranodon: 1.e4 g6 2.d4 Bg7 3.Nc3 c5 4.d5 Bxc3+ 5.bxc3 Qa5 *Pterodactyl Defense: Eastern, Rhamphorhynchus: 1.e4 g6 2.d4 Bg7 3.Nc3 c5 4.dxc5 *Pterodactyl Defense: Eastern, Pteranodon: 1.e4 g6 2.d4 Bg7 3.Nc3 c5 4.dxc5 Bxc3+ 5.bxc3 Qa5 *Pterodactyl Defense: Eastern, Pterodactyl: 1.e4 g6 2.d4 Bg7 3.Nc3 c5 4.dxc5 Qa5 *Pterodactyl Defense: Sicilian, Siroccopteryx: 1.e4 g6 2.d4 Bg7 3.Nc3 c5 4.Nf3 Qa5 5.Bc4 *Pterodactyl Defense: Sicilian, Quetzalcoatlus: 1.e4 g6 2.d4 Bg7 3.Nc3 c5 4.Nf3 Qa5 5.Be2 d6 *Modern Defense: Anti-Modern: 1.e4 g6 2.d4 Bg7 3.Nc3 c6 4.Bc4 d6 5.Qe2 *Modern Defense: Gurgenidze Defense: 1.e4 g6 2.d4 Bg7 3.Nc3 c6 4.f4 d5 5.e5 h5 *Modern Defense: Two Knights Variation, Suttles Variation: 1.e4 g6 2.d4 Bg7 3.Nc3 c6 4.Nf3 d6 *Modern Defense: Lizard Defense, Mittenberger Gambit: 1.e4 g6 2.d4 Bg7 3.Nc3 d5 *Modern Defense: Standard Defense: 1.e4 g6 2.d4 Bg7 3.Nc3 d6 *Modern Defense: Pseudo-Austrian Attack: 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4 *Modern Defense: Two Knights Variation: 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3 *Modern Defense: Two Knights Variation, Suttles Variation, Tal Gambit: 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Nf3 c6 5.Bg5 Qb6 6.Qd2 Qxb2 *Modern Defense: Mongredien Defense, with Nf3: 1.e4 g6 2.d4 Bg7 3.Nf3 b6 *Pterodactyl Defense: Western, Anhanguera: 1.e4 g6 2.d4 Bg7 3.Nf3 c5 4.Be3 Qa5+ *Rat Defense: Accelerated Gurgenidze: 1.e4 g6 2.d4 d6 3.Nc3 c6 *Modern Defense: Fianchetto Gambit: 1.e4 g6 2.d4 f5 *Modern Defense: Norwegian Defense: 1.e4 g6 2.d4 Nf6 *Modern Defense: Norwegian Defense, Norwegian Gambit: 1.e4 g6 2.d4 Nf6 3.e5 Nh5 4.Be2 d6 *Modern Defense: Masur Gambit: 1.e4 g6 2.d4 Nh6 3.Nc3 f5 4.Bxh6 Bxh6 5.exf5 0-0 *Pterodactyl Defense: Austrian, Grand Prix Pterodactyl: 1.e4 g6 2.Nc3 Bg7 3.f4 c5 4.Nf3 Qa5 *Pterodactyl Defense: Western, Siroccopteryx: 1.e4 g6 2.Nf3 Bg7 3.d4 c5 4.Bc4 cxd4 5.Nxd4 Qa5+ '''B07''' [[Pirc Defence]] *King's Pawn Game: Maróczy Defense: 1.e4 d6 2.d4 e5 *Czech Defense: 1.e4 d6 2.d4 Nf6 3.Nc3 c6 *Pirc Defense: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 *Pirc Defense: Kholmov System: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bc4 *Pirc Defense: Chinese Variation: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.g4 *Pirc Defense: Bayonet Attack: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.h4 *Pirc Defense: 150 Attack, Sveshnikov-Janša Attack: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 c6 5.h3 *Pirc Defense: 150 Attack: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 c6 5.Qd2 *Pirc Defense: 150 Attack, Inner Doll Defense: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 c6 5.Qd2 Bg4 *Pirc Defense: Byrne Variation: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bg5 *Pirc Defense: Sveshnikov System: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.g3 *Lion Defense: Anti-Philidor: 1.e4 d6 2.d4 Nf6 3.Nc3 Nbd7 4.f4 *Lion Defense: Anti-Philidor, Lion's Cave: 1.e4 d6 2.d4 Nf6 3.Nc3 Nbd7 4.f4 e5 *Lion Defense: Anti-Philidor, Lion's Cave, Lion Claw Gambit: 1.e4 d6 2.d4 Nf6 3.Nc3 Nbd7 4.f4 e5 5.Nf3 exd4 6.Qxd4 c6 7.Bc4 d5 *Lion Defense: Bayonet Attack: 1.e4 d6 2.d4 Nf6 3.Nc3 Nbd7 4.g4 *Modern Defense: Geller's System: 1.e4 g6 2.d4 Bg7 3.Nf3 d6 4.c3 '''B08''' [[Pirc Defence#Classical (Two Knights) System: 4.Nf3|Pirc, Classical (Two Knights) System]] *Pirc Defense: Classical Variation: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 *Pirc Defense: Classical Variation: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 *Pirc Defense: Classical Variation, Quiet System: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 *Pirc Defense: Classical Variation, Quiet System, Parma Defense: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 0-0 6.0-0 Bg4 *Pirc Defense: Classical Variation, Quiet System, Czech Defense: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 0-0 6.0-0 c6 *Pirc Defense: Classical Variation, Quiet System, Chigorin Line: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 0-0 6.0-0 Nc6 *Pirc Defense: Classical Variation, Schlechter Variation: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.h3 '''B09''' [[Pirc Defence, Austrian Attack|Pirc, Austrian Attack]] *Pirc Defense: Austrian Attack: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 *Pirc Defense: Austrian Attack, Ljubojevic Variation: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Bc4 *Pirc Defense: Austrian Attack, Dragon Formation: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 c5 *Pirc Defense: Austrian Attack: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 0-0 *Pirc Defense: Austrian Attack, Weiss Variation: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 0-0 6.Bd3 *Pirc Defense: Austrian Attack, Kurajica Variation: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 0-0 6.Be3 *Pirc Defense: Austrian Attack, Unzicker Attack: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 0-0 6.e5 *Pirc Defense: Austrian Attack, Unzicker Attack, Bronstein Variation: 1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 0-0 6.e5 Nfd7 7.h4 '''B10''' [[Caro–Kann Defence]] *Caro-Kann Defense: 1.e4 c6 *Caro-Kann Defense: Euwe Attack: 1.e4 c6 2.b3 *Caro-Kann Defense: Labahn Attack: 1.e4 c6 2.b4 *Caro-Kann Defense: Labahn Attack, Double Gambit: 1.e4 c6 2.b4 d5 3.b5 *Caro-Kann Defense: Labahn Attack, Polish Variation: 1.e4 c6 2.b4 e5 3.Bb2 *Caro-Kann Defense: Hillbilly Attack: 1.e4 c6 2.Bc4 *Caro-Kann Defense: Hillbilly Attack, Schaeffer Gambit: 1.e4 c6 2.Bc4 d5 3.Bb3 dxe4 4.Qh5 *Caro-Kann Defense: Accelerated Panov Attack: 1.e4 c6 2.c4 *Caro-Kann Defense: Accelerated Panov Attack: 1.e4 c6 2.c4 d5 *Caro-Kann Defense: Accelerated Panov Attack, Van Weersel Attack: 1.e4 c6 2.c4 d5 3.cxd5 cxd5 4.Qb3 *Caro-Kann Defense: Toikkanen Gambit: 1.e4 c6 2.c4 d5 3.e5 *Caro-Kann Defense: Accelerated Panov Attack, Modern Variation: 1.e4 c6 2.c4 d5 3.exd5 cxd5 4.cxd5 Nf6 *Caro-Kann Defense: Accelerated Panov Attack, Pseudo-Scandinavian: 1.e4 c6 2.c4 d5 3.exd5 Qxd5 *Caro-Kann Defense: Accelerated Panov Attack, Open Variation: 1.e4 c6 2.c4 e5 *Caro-Kann Defense: Breyer Variation: 1.e4 c6 2.d3 *Caro-Kann Defense: Breyer Variation, Stein Attack: 1.e4 c6 2.d3 d5 3.Nd2 g6 4.Ngf3 Bg7 5.g3 e5 6.Bg2 Ne7 7.0-0 0-0 8.b4 *Caro-Kann Defense: Spike Variation: 1.e4 c6 2.g4 *Caro-Kann Defense: Spike Variation, Scorpion-Grob Gambit: 1.e4 c6 2.g4 d5 3.Nc3 dxe4 4.d3 *Caro-Kann Defense: 1.e4 c6 2.Nc3 *Caro-Kann Defense: 1.e4 c6 2.Nc3 d5 *Caro-Kann Defense: Scorpion-Horus Gambit: 1.e4 c6 2.Nc3 d5 3.d3 dxe4 4.Bg5 *Caro-Kann Defense: St. Patrick's Attack: 1.e4 c6 2.Nc3 d5 3.h3 *Caro-Kann Defense: Two Knights Attack: 1.e4 c6 2.Nc3 d5 3.Nf3 *Caro-Kann Defense: Hector Gambit: 1.e4 c6 2.Nc3 d5 3.Nf3 dxe4 4.Ng5 *Caro-Kann Defense: Goldman Variation: 1.e4 c6 2.Nc3 d5 3.Qf3 *Caro-Kann Defense: Endgame Offer: 1.e4 c6 2.Nf3 d5 3.d3 *Caro-Kann Defense: Endgame Variation: 1.e4 c6 2.Nf3 d5 3.d3 dxe4 4.dxe4 Qxd1+ 5.Kxd1 *Caro-Kann Defense: Apocalypse Attack: 1.e4 c6 2.Nf3 d5 3.exd5 cxd5 4.Ne5 '''B11''' Caro–Kann, Two knights, 3...Bg4 *Caro-Kann Defense: Two Knights Attack, Mindeno Variation: 1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 *Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Retreat Line: 1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 4.h3 Bh5 *Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line: 1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 4.h3 Bxf3 '''B12''' Caro–Kann Defence *Caro-Kann Defense: 1.e4 c6 2.d4 *Caro-Kann Defense: 1.e4 c6 2.d4 d5 *Caro-Kann Defense: Mieses Attack, Landau Gambit: 1.e4 c6 2.d4 d5 3.Bd3 Nf6 4.e5 Nfd7 5.e6 *Caro-Kann Defense: Mieses Gambit: 1.e4 c6 2.d4 d5 3.Be3 *Caro-Kann Defense: Advance Variation: 1.e4 c6 2.d4 d5 3.e5 *Caro-Kann Defense: Advance Variation, Prins Attack: 1.e4 c6 2.d4 d5 3.e5 Bf5 4.b4 *Caro-Kann Defense: Advance, Short Variation: 1.e4 c6 2.d4 d5 3.e5 Bf5 4.c3 e6 5.Be2 *Caro-Kann Defense: Advance Variation, Bayonet Attack: 1.e4 c6 2.d4 d5 3.e5 Bf5 4.g4 *Caro-Kann Defense: Advance Variation, Tal Variation: 1.e4 c6 2.d4 d5 3.e5 Bf5 4.h4 *Caro-Kann Defense: Advance Variation, Van der Wiel Attack: 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nc3 *Caro-Kann Defense: Advance Variation, Van der Wiel Attack: 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nc3 e6 5.g4 Bg6 6.Nge2 c5 7.h4 *Caro-Kann Defense: Advance Variation, Van der Wiel Attack, Dreyev Defense: 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nc3 Qb6 *Caro-Kann Defense: Advance Variation, Bronstein Variation: 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Ne2 *Caro-Kann Defense: Advance Variation, Short Variation: 1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 *Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense: 1.e4 c6 2.d4 d5 3.e5 c5 *Caro-Kann Defense: Maróczy Variation: 1.e4 c6 2.d4 d5 3.f3 *Caro-Kann Defense: Maróczy Variation, Maróczy Gambit: 1.e4 c6 2.d4 d5 3.f3 dxe4 4.fxe4 e5 5.Nf3 exd4 6.Bc4 *Caro-Kann Defense: Modern Variation: 1.e4 c6 2.d4 d5 3.Nd2 *Caro-Kann Defense: Edinburgh Variation: 1.e4 c6 2.d4 d5 3.Nd2 Qb6 *Caro-Kann Defense: Ulysses Gambit: 1.e4 c6 2.d4 d5 3.Nf3 dxe4 4.Ng5 *Caro-Kann Defense: Massachusetts Defense: 1.e4 c6 2.d4 f5 *Caro-Kann Defense: De Bruycker Defense: 1.e4 c6 2.d4 Na6 *Caro-Kann Defense: De Bruycker Defense: 1.e4 c6 2.d4 Na6 3.Nc3 Nc7 *Caro-Kann Defense: Masi Variation: 1.e4 c6 2.d4 Nf6 '''B13''' Caro–Kann, Exchange Variation *Caro-Kann Defense: Exchange Variation: 1.e4 c6 2.d4 d5 3.exd5 *Caro-Kann Defense: Exchange Variation, Rubinstein Variation: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Bd3 Nc6 5.c3 Nf6 6.Bf4 *Caro-Kann Defense: Panov Attack: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 *Caro-Kann Defense: Panov Attack, Gunderam Attack: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.c5 *Caro-Kann Defense: Panov Attack: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 *Caro-Kann Defense: Panov Attack, Modern Defense: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 *Caro-Kann Defense: Panov-Botvinnik, Herzog Defense: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 dxc4 7.d5 Na5 *Caro-Kann Defense: Panov Attack, Modern Defense, Carlsbad Line: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 e6 *Caro-Kann Defense: Panov Attack, Modern Defense, Czerniak Line: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qa5 *Caro-Kann Defense: Panov Attack, Modern Defense, Reifir-Spielmann Line: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qb6 *Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Nf3 Bg4 *Caro-Kann Defense: Exchange Variation, Bulla Attack: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.g4 *Caro-Kann Defense: Exchange Variation: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Nf3 Nc6 '''B14''' Caro–Kann, Panov–Botvinnik Attack, 5...e6 *Caro-Kann Defense: Panov Attack: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 e6 *Caro-Kann Defense: Panov Attack, Main Line: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 e6 6.Nf3 Bb4 *Caro-Kann Defense: Panov Attack, Fianchetto Defense: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 g6 *Caro-Kann Defense: Panov Attack, Fianchetto Defense, Fianchetto Gambit: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 g6 6.cxd5 Bg7 '''B15''' Caro–Kann Defence *Caro-Kann Defense: 1.e4 c6 2.d4 d5 3.Nc3 *Caro-Kann Defense: Gurgenidze Counterattack: 1.e4 c6 2.d4 d5 3.Nc3 b5 *Caro-Kann Defense: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 *Caro-Kann Defense: von Hennig Gambit: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Bc4 *Caro-Kann Defense: Rasa-Studier Gambit: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.f3 *Caro-Kann Defense: Alekhine Gambit: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Bd3 *Caro-Kann Defense: Alien Gambit: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Ng5 h6 6.Nxf7 *Caro-Kann Defense: Tartakower Variation: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 *Caro-Kann Defense: Forgacs Variation: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.Bc4 *Caro-Kann Defense: Gurgenidze System: 1.e4 c6 2.d4 d5 3.Nc3 g6 *Caro-Kann Defense: Campomanes Attack: 1.e4 c6 2.d4 d5 3.Nc3 Nf6 *Caro-Kann Defense: Main Line: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 '''B16''' Caro–Kann, Bronstein–Larsen Variation *Caro-Kann Defense: Bronstein-Larsen Variation: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ gxf6 *Caro-Kann Defense: Finnish Variation: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 h6 '''B17''' Caro–Kann, Steinitz Variation, Smyslov Systems *Caro-Kann Defense: Karpov Variation, Modern Variation, Kasparov Attack: 1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Ng3 *Caro-Kann Defense: Karpov Variation: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nd7 *Caro-Kann Defense: Karpov Variation, Smyslov Variation: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Ng5 e6 7.Qe2 Nb6 *Caro-Kann Defense: Karpov Variation, Smyslov Variation, Main Line: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Ng5 e6 7.Qe2 Nb6 8.Bb3 *Caro-Kann Defense: Karpov Variation, Tiviakov-Fischer Attack: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Nxf6+ Nxf6 *Caro-Kann Defense: Karpov Variation, Modern Variation: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nd7 5.Ng5 *Caro-Kann Defense: Karpov Variation, Modern Variation, Ivanchuk Defense: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nd7 5.Ng5 Ndf6 *Caro-Kann Defense: Karpov Variation, Modern Main Line: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nd7 5.Ng5 Ngf6 6.Bd3 e6 7.N1f3 Bd6 8.Qe2 h6 9.Ne4 Nxe4 10.Qxe4 '''B18''' Caro–Kann, Classical Variation *Caro-Kann Defense: Classical Variation: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5 *Caro-Kann Defense: Classical Variation, Maróczy Attack: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.f4 *Caro-Kann Defense: Classical Variation, Main Line: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 *Caro-Kann Defense: Classical Variation, Flohr Variation: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.Nh3 '''B19''' Caro–Kann, Classical, 7...Nd7 *Caro-Kann Defense: Classical Variation: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 *Caro-Kann Defense: Classical Variation, Spassky Variation: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 8.h5 *Caro-Kann Defense: Classical Variation, Lobron System: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 e6 11.Bd2 Ngf6 12.0-0-0 Be7 *Caro-Kann Defense: Classical Variation, Seirawan Variation: 1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3 Ngf6 11.Bd2 e6 12.0-0-0 Bd6 ===B20–B99=== 1.e4 c5: [[Sicilian Defence]] *B20 [[Sicilian Defence]], (any move for white without 2.Nc3 (B23–B26), 2.c3 (B22), 2.f4 (B21) and 2.Nf3 (B27–B99)) *Sicilian Defense: 1.e4 c5 *Sicilian Defense: Mengarini Variation: 1.e4 c5 2.a3 *Sicilian Defense: Myers Attack, with a4: 1.e4 c5 2.a4 *Sicilian Defense: Snyder Variation: 1.e4 c5 2.b3 *Sicilian Defense: Snyder Variation, Queen Fianchetto Variation: 1.e4 c5 2.b3 b6 *Sicilian Defense: Euwe Attack, Prins Gambit: 1.e4 c5 2.b3 d5 3.Bb2 *Sicilian Defense: Wing Gambit: 1.e4 c5 2.b4 *Sicilian Defense: Wing Gambit, Marshall Variation: 1.e4 c5 2.b4 cxb4 3.a3 *Sicilian Defense: Wing Gambit, Carlsbad Variation: 1.e4 c5 2.b4 cxb4 3.a3 bxa3 *Sicilian Defense: Wing Gambit, Marienbad Variation: 1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5 5.Bb2 *Sicilian Defense: Wing Gambit, Romanian Defense: 1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5 5.Nf3 e5 6.Bb2 Nc6 7.c4 Qe6 *Sicilian Defense: Wing Gambit, Nanu Gambit: 1.e4 c5 2.b4 cxb4 3.a3 d5 4.exd5 Qxd5 5.Nf3 e5 6.c4 Qe6 7.Bd3 *Sicilian Defense: Wing Gambit, Abrahams Variation: 1.e4 c5 2.b4 cxb4 3.Bb2 *Sicilian Defense: Wing Gambit, Santasiere Variation: 1.e4 c5 2.b4 cxb4 3.c4 *Sicilian Defense: Bowdler Attack: 1.e4 c5 2.Bc4 *Sicilian Defense: Staunton-Cochrane Variation: 1.e4 c5 2.c4 *Sicilian Defense: Gloria Variation: 1.e4 c5 2.c4 d6 3.Nc3 Nc6 4.g3 h5 *Sicilian Defense: Big Clamp Formation: 1.e4 c5 2.d3 Nc6 3.c3 d6 4.f4 *Sicilian Defense: Lasker-Dunne Attack: 1.e4 c5 2.g3 *Sicilian Defense: Grob Variation: 1.e4 c5 2.g4 *Sicilian Defense: Myers Attack, with h4: 1.e4 c5 2.h4 *Sicilian Defense: King David's Opening: 1.e4 c5 2.Ke2 *Sicilian Defense: Kronberger Variation: 1.e4 c5 2.Na3 *Sicilian Defense: Kronberger Variation, Nemeth Gambit: 1.e4 c5 2.Na3 Nc6 3.d4 cxd4 4.Bc4 *Sicilian Defense: Keres Variation: 1.e4 c5 2.Ne2 *Sicilian Defense: Brick Variation: 1.e4 c5 2.Nh3 *Sicilian Defense: Amazon Attack: 1.e4 c5 2.Qg4 *B21 Sicilian, Grand Prix Attack, 2.f4 (without 2...e5 (C30)) *Sicilian Defense: Smith-Morra Gambit: 1.e4 c5 2.d4 *Sicilian Defense: Smith-Morra Gambit: 1.e4 c5 2.d4 cxd4 3.c3 *Sicilian Defense: Smith-Morra Gambit Declined, Push Variation: 1.e4 c5 2.d4 cxd4 3.c3 d3 *Sicilian Defense: Smith-Morra Gambit Declined, Dubois Variation: 1.e4 c5 2.d4 cxd4 3.c3 d3 4.c4 *Sicilian Defense: Smith-Morra Gambit Declined, Scandinavian Formation: 1.e4 c5 2.d4 cxd4 3.c3 d5 *Sicilian Defense: Smith-Morra Gambit Accepted: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 *Sicilian Defense: Smith-Morra Gambit, Danish Variation: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nf3 *Sicilian Defense: Smith-Morra Gambit Accepted, Chicago Defense: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 d6 5.Nf3 e6 6.Bc4 Nf6 7.0-0 a6 *Sicilian Defense: Smith-Morra Gambit Accepted, Taimanov Formation: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Bc4 a6 6.Nf3 Ne7 *Sicilian Defense: Smith-Morra Gambit Accepted, Kan Formation: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 a6 *Sicilian Defense: Smith-Morra Gambit Accepted, Finegold Defense: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 d6 6.Bc4 a6 7.0-0 Be7 8.Qe2 Nf6 *Sicilian Defense: Smith-Morra Gambit Accepted, Sozin Formation: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Bc4 e6 6.Nf3 d6 7.0-0 a6 8.Qe2 b5 *Sicilian Defense: Smith-Morra Gambit, Chicago Defense: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Bc4 e6 6.Nf3 d6 7.0-0 a6 8.Qe2 b5 9.Bb3 Ra7 *Sicilian Defense: Smith-Morra Gambit Accepted, Classical Formation: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 a6 7.0-0 Nf6 *Sicilian Defense: Smith-Morra Gambit Accepted, Scheveningen Formation: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 d6 6.Bc4 e6 *Sicilian Defense: Smith-Morra Gambit Accepted, Paulsen Formation: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 *Sicilian Defense: Smith-Morra Gambit Accepted, Morphy Defense Deferred: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 a6 7.0-0 b5 8.Bb3 Bc5 *Sicilian Defense: Smith-Morra Gambit Accepted, Pin Defense: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Bb4 *Sicilian Defense: Smith-Morra Gambit Accepted, Morphy Defense: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Bc5 *Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Qc7 *Sicilian Defense: Smith-Morra Gambit Accepted, Larsen Defense: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Qc7 7.Qe2 a6 8.0-0 Bd6 *Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation, Siberian Trap: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 e6 6.Bc4 Qc7 7.Qe2 Nf6 8.0-0 Ng4 *Sicilian Defense: Smith-Morra Gambit Accepted, Fianchetto Defense: 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 Nc6 5.Nf3 g6 *Sicilian Defense: Smith-Morra Gambit Declined, Center Formation: 1.e4 c5 2.d4 cxd4 3.c3 e5 *Sicilian Defense: Smith-Morra Gambit Declined, Alapin Formation: 1.e4 c5 2.d4 cxd4 3.c3 Nf6 *Sicilian Defense: Smith-Morra Gambit Declined, Wing Formation: 1.e4 c5 2.d4 cxd4 3.c3 Qa5 *Sicilian Defense: Halasz Gambit: 1.e4 c5 2.d4 cxd4 3.f4 *Sicilian Defense: Morphy Gambit: 1.e4 c5 2.d4 cxd4 3.Nf3 *Sicilian Defense: Morphy Gambit, Andreaschek Gambit: 1.e4 c5 2.d4 cxd4 3.Nf3 e5 4.c3 *Sicilian Defense: Coles Sicilian Gambit: 1.e4 c5 2.d4 cxd4 3.Qxd4 Nc6 4.Qd1 Nf6 5.Bc4 *Sicilian Defense: McDonnell Attack: 1.e4 c5 2.f4 *Sicilian Defense: McDonnell Attack, Tal Gambit: 1.e4 c5 2.f4 d5 3.exd5 Nf6 *Bird Opening: Dutch Variation, Batavo Gambit: 1.e4 c5 2.f4 d5 3.Nf3 dxe4 *B22 [[Sicilian Defence, Alapin Variation|Sicilian, Alapin Variation]], 2.c3 (without 2...d6 3.Nf3 (C50), 2...e6 3.Nf3 d5 (B40), 2...e6 3.d4 d5 4.e5 (C02), 2...g6 3.Nf3 (B27)) *Sicilian Defense: Alapin Variation: 1.e4 c5 2.c3 *Sicilian Defense: Alapin Variation, Barmen Defense: 1.e4 c5 2.c3 d5 3.exd5 Qxd5 *Sicilian Defense: Alapin Variation, Barmen Defense, Central Exchange: 1.e4 c5 2.c3 d5 3.exd5 Qxd5 4.d4 cxd4 5.cxd4 Nc6 6.Nf3 Bg4 *Sicilian Defense: Alapin Variation, Barmen Defense, Endgame Variation: 1.e4 c5 2.c3 d5 3.exd5 Qxd5 4.d4 cxd4 5.cxd4 Nc6 6.Nf3 Bg4 7.Nc3 Bxf3 8.gxf3 Qxd4 9.Qxd4 Nxd4 *Sicilian Defense: Alapin Variation, Barmen Defense, Milner-Barry Attack: 1.e4 c5 2.c3 d5 3.exd5 Qxd5 4.d4 Nc6 5.Nf3 cxd4 6.cxd4 e5 7.Nc3 Bb4 8.Be2 *Sicilian Defense: Alapin Variation, Barmen Defense, Modern Line: 1.e4 c5 2.c3 d5 3.exd5 Qxd5 4.d4 Nf6 5.Nf3 Bg4 *Sicilian Defense: Alapin Variation, Smith-Morra Declined: 1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.d4 cxd4 *Sicilian Defense: Alapin Variation, Stoltz Attack: 1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.Nf3 Nc6 5.Bc4 Nb6 6.Bb3 *Sicilian Defense: Alapin Variation, Stoltz Attack, Ivanchuk Line: 1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.Nf3 Nc6 5.Bc4 Nb6 6.Bb3 c4 7.Bc2 Qc7 8.Qe2 g5 *Sicilian Defense: Heidenfeld Variation: 1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.Nf3 Nc6 5.Na3 *B23 Sicilian, Closed, 2.Nc3 (without 2...a6 3.Nf3 (B28), 2...d6 3.Nf3 (B50), 2...Nc6 3.g3 (B24–B26)) *Sicilian Defense: Closed: 1.e4 c5 2.Nc3 *Sicilian Defense: Closed: 1.e4 c5 2.Nc3 e6 *Sicilian Defense: Closed: 1.e4 c5 2.Nc3 e6 3.g3 *Sicilian Defense: Closed, Korchnoi Defense: 1.e4 c5 2.Nc3 e6 3.g3 d5 *Sicilian Defense: Closed, Traditional: 1.e4 c5 2.Nc3 Nc6 *Sicilian Defense: Grand Prix Attack: 1.e4 c5 2.Nc3 Nc6 3.f4 *Sicilian Defense: Grand Prix Attack, Schofman Variation: 1.e4 c5 2.Nc3 Nc6 3.f4 g6 4.Nf3 Bg7 5.Bc4 e6 6.f5 *Sicilian Defense: Closed, Grob Attack: 1.e4 c5 2.Nc3 Nc6 3.g4 *Sicilian Defense: Closed, Chameleon Variation: 1.e4 c5 2.Nc3 Nc6 3.Nge2 *B24 Sicilian, Closed, 2.Nc3 Nc6 3.g3 (without 3...g6 (B25–B26)) *Sicilian Defense: Closed, Fianchetto Variation: 1.e4 c5 2.Nc3 Nc6 3.g3 *Sicilian Defense: Closed: 1.e4 c5 2.Nc3 Nc6 3.g3 g6 *Sicilian Defense: Closed: 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 *Sicilian Defense: Closed, Smyslov Variation: 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 e6 6.Be3 Nd4 7.Nce2 *B25 Sicilian, Closed, 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 (without 6.Be3 (B26)) *Sicilian Defense: Closed: 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 *Sicilian Defense: Closed: 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 *Sicilian Defense: Closed, Botvinnik Defense, with f4: 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e5 *Sicilian Defense: Closed, Botvinnik Defense, Edge Variation: 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e5 7.Nh3 Nge7 *Sicilian Defense: Closed, Botvinnik Defense, with Nge2: 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.Nge2 e5 *B26 Sicilian, Closed, 6.Be3 *Sicilian Defense: Closed: 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.Be3 *B27 Sicilian Defence, 2.Nf3 (without 2...a6 (B28), 2...Nc6 (B30), 2...d6 (B50), 2...e6 (B40), 2...Nf6 (B29)) *Sicilian Defense: 1.e4 c5 2.Nf3 *Sicilian Defense: Polish Gambit: 1.e4 c5 2.Nf3 b5 *Sicilian Defense: Katalimov Variation: 1.e4 c5 2.Nf3 b6 *Sicilian Defense: Jalalabad Variation: 1.e4 c5 2.Nf3 e5 *Sicilian Defense: Brussels Gambit: 1.e4 c5 2.Nf3 f5 *Sicilian Defense: Double-Dutch Gambit: 1.e4 c5 2.Nf3 f5 3.exf5 Nh6 *Sicilian Defense: Hyperaccelerated Dragon: 1.e4 c5 2.Nf3 g6 *Pterodactyl Defense: Western, Pterodactyl: 1.e4 c5 2.Nf3 g6 3.c3 Bg7 4.d4 Qa5 *Sicilian Defense: Acton Extension: 1.e4 c5 2.Nf3 g6 3.c4 Bh6 *Sicilian Defense: Hyperaccelerated Fianchetto: 1.e4 c5 2.Nf3 g6 3.d4 *Sicilian Defense: Hyperaccelerated Pterodactyl: 1.e4 c5 2.Nf3 g6 3.d4 Bg7 *Pterodactyl Defense: Western, Rhamphorhynchus: 1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.dxc5 Qa5+ *Pterodactyl Defense: Sicilian, Rhamphorhynchus: 1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.dxc5 Qa5+ 5.Nc3 *Pterodactyl Defense: Sicilian, Pteranodon: 1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.dxc5 Qa5+ 5.Nc3 Bxc3+ 6.bxc3 *Sicilian Defense: Hyperaccelerated Pterodactyl, Exchange Variation: 1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.dxc5 Qa5+ 5.Nc3 Bxc3+ 6.bxc3 Qxc3+ *Modern Defense: Pterodactyl Variation: 1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.Nc3 Qa5 *Pterodactyl Defense: Sicilian, Unpin: 1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.Nc3 Qa5 5.Bd2 *Pterodactyl Defense: Sicilian, Anhanguera: 1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.Nc3 Qa5 5.Be3 *Pterodactyl Defense: Sicilian, Benoni Gambit: 1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.Nc3 Qa5 5.d5 *Sicilian Defense: Frederico Variation: 1.e4 c5 2.Nf3 g6 3.d4 f5 *Sicilian Defense: Bücker Variation: 1.e4 c5 2.Nf3 h6 *Sicilian Defense: Mongoose Variation: 1.e4 c5 2.Nf3 Qa5 *Sicilian Defense: Quinteros Variation: 1.e4 c5 2.Nf3 Qc7 *B28 Sicilian, O'Kelly Variation, 2.Nf3 a6 (without 3.d4 cxd4 4.Nxd4 e6 (B41, B43)) *Sicilian Defense: O'Kelly Variation: 1.e4 c5 2.Nf3 a6 *Sicilian Defense: O'Kelly Variation, Kieseritzky System: 1.e4 c5 2.Nf3 a6 3.b3 *Sicilian Defense: O'Kelly Variation, Wing Gambit: 1.e4 c5 2.Nf3 a6 3.b4 *Sicilian Defense: O'Kelly Variation, Aronin System: 1.e4 c5 2.Nf3 a6 3.Be2 *Sicilian Defense: O'Kelly Variation, Venice System: 1.e4 c5 2.Nf3 a6 3.c3 *Sicilian Defense: O'Kelly Variation, Venice System, Ljubojevic Line: 1.e4 c5 2.Nf3 a6 3.c3 b5 *Sicilian Defense: O'Kelly Variation, Venice System, Gambit Line: 1.e4 c5 2.Nf3 a6 3.c3 d5 4.exd5 Nf6 *Sicilian Defense: O'Kelly Variation, Venice System, Steiner Line: 1.e4 c5 2.Nf3 a6 3.c3 d6 *Sicilian Defense: O'Kelly Variation, Venice System, Barcza Line: 1.e4 c5 2.Nf3 a6 3.c3 Nf6 *Sicilian Defense: O'Kelly Variation, Maróczy Bind: 1.e4 c5 2.Nf3 a6 3.c4 *Sicilian Defense: O'Kelly Variation, Maróczy Bind, Robatsch Line: 1.e4 c5 2.Nf3 a6 3.c4 d6 *Sicilian Defense: O'Kelly Variation, Maróczy Bind, Paulsen Line: 1.e4 c5 2.Nf3 a6 3.c4 e6 *Sicilian Defense: O'Kelly Variation, Quiet System: 1.e4 c5 2.Nf3 a6 3.d3 *Sicilian Defense: O'Kelly Variation, Normal System: 1.e4 c5 2.Nf3 a6 3.d4 *Sicilian Defense: O'Kelly Variation, Normal System, Cortlever Gambit: 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Bc4 *Sicilian Defense: O'Kelly Variation, Normal System, Smith-Morra Line: 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.c3 *Sicilian Defense: O'Kelly Variation, Normal System, Taimanov Line: 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Nxd4 e5 *Sicilian Defense: O'Kelly Variation, Normal System, Zagorovsky Line: 1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Qxd4 *Sicilian Defense: O'Kelly Variation, Réti System: 1.e4 c5 2.Nf3 a6 3.g3 *Sicilian Defense: O'Kelly Variation, Yerevan System: 1.e4 c5 2.Nf3 a6 3.Nc3 *B29 Sicilian, Nimzovich–Rubinstein Variation, 2.Nf3 Nf6 (without 3.e5 Nd5 4.c3 (B22), 3.Nc3 Nc6 (B30), 3.Nc3 d6 (B50), 3.d4 cxd4 4.Nxd4 d6 (B54, B56, B94–B99)) *Sicilian Defense: Nimzowitsch Variation: 1.e4 c5 2.Nf3 Nf6 *Sicilian Defense: Nimzowitsch Variation, Advance Variation: 1.e4 c5 2.Nf3 Nf6 3.e5 *Sicilian Defense: Nimzowitsch Variation, Main Line: 1.e4 c5 2.Nf3 Nf6 3.e5 Nd5 4.Nc3 e6 5.Nxd5 exd5 6.d4 Nc6 *Sicilian Defense: Nimzowitsch Variation, Exchange Variation: 1.e4 c5 2.Nf3 Nf6 3.e5 Nd5 4.Nc3 Nxc3 *Sicilian Defense: Nimzowitsch Variation, Closed Variation: 1.e4 c5 2.Nf3 Nf6 3.Nc3 *B30 Sicilian Defence, 2.Nf3 Nc6 (without 3.Bb5 g6 (B31) 3.Bb5 d6 (B51)) ** Sicilian, Rossolimo Variation, 3.Bb5 *Sicilian Defense: Old Sicilian: 1.e4 c5 2.Nf3 Nc6 *Sicilian Defense: Portsmouth Gambit: 1.e4 c5 2.Nf3 Nc6 3.b4 *Sicilian Defense: Nyezhmetdinov-Rossolimo Attack: 1.e4 c5 2.Nf3 Nc6 3.Bb5 *Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, San Francisco Gambit: 1.e4 c5 2.Nf3 Nc6 3.Bb5 Na5 4.b4 *Sicilian Defense: Rossolimo Variation, Brooklyn Retreat Defense: 1.e4 c5 2.Nf3 Nc6 3.Bb5 Nb8 *Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d6: 1.e4 c5 2.Nf3 Nc6 3.Nc3 e5 4.Bc4 Be7 5.d3 d6 *Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line: 1.e4 c5 2.Nf3 Nc6 3.Nc3 e5 4.Bc4 Be7 5.d3 d6 6.Nd2 Bg5 *Sicilian Defense: Closed, Anti-Sveshnikov Variation, with Nf6: 1.e4 c5 2.Nf3 Nc6 3.Nc3 e5 4.Bc4 Be7 5.d3 Nf6 *B31 Sicilian, Nimzovich–Rossolimo Attack, 3.Bb5 g6 *Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation: 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 *Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Gufeld Gambit: 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.0-0 Bg7 5.c3 e5 6.d4 *Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Lutikov Gambit: 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.0-0 Bg7 5.c3 Nf6 6.d4 *Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Totsky Attack: 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.0-0 Bg7 5.c3 Nf6 6.Qa4 *Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Gurgenidze Variation: 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.0-0 Bg7 5.Re1 e5 6.b4 *B32 Sicilian Defence, 2.Nf3 Nc6 3.d4 (without 3...cxd4 4.Nxd4 Nf6 (B33), 4...e6 (B44–B47) 4...g6 (B34)) *Sicilian Defense: Open: 1.e4 c5 2.Nf3 Nc6 3.d4 *Sicilian Defense: Open: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 *Sicilian Defense: Open: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 *Sicilian Defense: O'Kelly Variation, Maróczy Bind, Geller Line: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 a6 5.c4 e5 *Sicilian Defense: Nimzo-American Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 d5 *Sicilian Defense: Löwenthal Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 *Sicilian Defense: Kalashnikov Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 d6 *Sicilian Defense: Accelerated Dragon: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 *Sicilian Defense: Godiva Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qb6 *Sicilian Defense: Flohr Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qc7 *Sicilian Defense: Franco-Sicilian Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 e6 *B33 Sicilian, Sveshnikov (Lasker–Pelikan) Variation, 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 (without 5.Nc3 e6 (B45) 5...g6 (B34) 5...d6 (B56)) *Sicilian Defense: Open: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 *Sicilian Defense: Lasker-Pelikan Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 *Sicilian Defense: Lasker-Pelikan Variation, Schlechter Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Nb3 *Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 *Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Novosibirsk Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 Bg7 *Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 *Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Peresypkin's Sacrifice: 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 11.Bxb5 *Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Nd5 *Sicilian Defense: Lasker-Pelikan Variation, Bird Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 Be6 *Sicilian Defense: Lasker-Pelikan Variation, Retreat Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Nf3 *Sicilian Defense: Lasker-Pelikan Variation, Exchange Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Nxc6 *Sicilian Defense: Four Knights Variation, Cobra Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Ndb5 Bc5 *B34 [[Sicilian Defence, Accelerated Dragon|Sicilian, Accelerated Fianchetto]], Exchange Variation, 2.Nf3 Nc6 3 d4.cxd4 4.Nxd4 g6 (without 5.c4 (B36), 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4 (B35)) *Sicilian Defense: Accelerated Dragon, Modern Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 *Sicilian Defense: Accelerated Dragon, Exchange Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nxc6 *B35 Sicilian, Accelerated Fianchetto, Modern Variation with 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4 (without 7...b6 (B72, B75)) *Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4 *Sicilian Defense: Dragon Variation, Modern Bc4 Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4 d6 *B36 Sicilian, Accelerated Fianchetto, [[Maróczy Bind]] 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 (without 5...Bg7 (B37–B39)) *Sicilian Defense: Accelerated Dragon, Maróczy Bind: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 *Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Nf6 6.Nc3 Nxd4 7.Qxd4 d6 *B37 Sicilian, Accelerated Fianchetto, Maróczy Bind, 5...Bg7 (without 6.Be3 (B38)) *Sicilian Defense: Accelerated Dragon, Maróczy Bind: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 *Sicilian Defense: Accelerated Dragon, Simagin Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Nc2 d6 7.Be2 Nh6 *B38 Sicilian, Accelerated Fianchetto, Maróczy Bind, 5...Bg7 6.Be3 (without 6...Nf6 7.Nc3 Ng4 (B39)) *Sicilian Defense: Accelerated Dragon, Maróczy Bind: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 *B39 Sicilian, Accelerated Fianchetto, Breyer Variation, 5...Bg7 6.Be3 Nf6 7.Nc3 Ng4 *Sicilian Defense: Accelerated Dragon, Maróczy Bind, Breyer Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 Nf6 7.Nc3 Ng4 *B40 Sicilian Defence, 2.Nf3 e6 *Sicilian Defense: French Variation: 1.e4 c5 2.Nf3 e6 *Sicilian Defense: French Variation, Westerinen Attack: 1.e4 c5 2.Nf3 e6 3.b3 *Sicilian Defense: Wing Gambit Deferred: 1.e4 c5 2.Nf3 e6 3.b4 *Sicilian Defense: Delayed Alapin Variation, with e6: 1.e4 c5 2.Nf3 e6 3.c3 *Sicilian Defense: Alapin Variation, Sherzer Variation: 1.e4 c5 2.Nf3 e6 3.c3 Nf6 4.e5 Nd5 5.d4 Nc6 *Sicilian Defense: Kramnik Variation: 1.e4 c5 2.Nf3 e6 3.c4 *Sicilian Defense: Drazic Variation: 1.e4 c5 2.Nf3 e6 3.d4 a6 *Sicilian Defense: French Variation, Open: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 *Sicilian Defense: Smith-Morra Gambit Deferred: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.c3 *Sicilian Defense: Paulsen-Basman Defense: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Bc5 *Sicilian Defense: French Variation, Normal: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 *Sicilian Defense: Pin Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 *Sicilian Defense: Pin Variation, Jaffe Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.Bd3 e5 *Sicilian Defense: Pin Variation, Koch Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.e5 *Sicilian Defense: Four Knights Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 *Sicilian Defense: Four Knights Variation, Exchange Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Nxc6 *Sicilian Defense: Gaw-Paw Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Qb6 *Sicilian Defense: Kveinis Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Qb6 *Sicilian Defense: Marshall Counterattack: 1.e4 c5 2.Nf3 e6 3.d4 d5 *Sicilian Defense: Kan Variation, Wing Attack, Fianchetto Variation: 1.e4 c5 2.Nf3 e6 3.Nc3 a6 4.g3 b5 5.d4 cxd4 6.Nxd4 *B41 Sicilian, Kan Variation, 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 (without 5.Bd3 (B42), 5.Nc3 (B43), 5.Be2 Nf6 6.Nc3 Qc7 (B43)) *Sicilian Defense: Kan Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 *Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 *Sicilian Defense: Kan Variation, Maróczy Bind, Hedgehog Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 g6 *Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 Nf6 6.Nc3 Bb4 7.Bd3 Nc6 *Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.c4 Nf6 6.Nc3 Bb4 7.Bd3 Nc6 8.Bc2 *B42 Sicilian, Kan, 5.Bd3 *Sicilian Defense: Kan Variation, Modern Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 *Sicilian Defense: Kan Variation, Polugaevsky Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Bc5 *Sicilian Defense: Kan Variation, Swiss Cheese Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 g6 *Sicilian Defense: Kan Variation, Gipslis Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Nf6 6.0-0 d6 7.c4 g6 *B43 Sicilian, Kan, 5.Nc3 *Sicilian Defense: Kan Variation, Knight Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 *Sicilian Defense: Kan Variation, Wing Attack: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 b5 *Sicilian Defense: Kan Variation, Wing Attack, Christiansen's Dream: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 b5 6.Bd3 Qb6 7.Be3 Bc5 8.Qg4 *Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 b5 6.Bd3 Qb6 7.Nf3 *B44 Sicilian Defence, 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 *Sicilian Defense: Taimanov Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 *Sicilian Defense: Taimanov Variation, Szén Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 *Sicilian Defense: Taimanov Variation, Modern Line: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 Be7 9.Be2 0-0 10.0-0 b6 *Sicilian Defense: Taimanov Variation, Gary Gambit: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 d5 *B45 Sicilian, Taimanov Variation, 5.Nc3 *Sicilian Defense: Taimanov Variation, Normal Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 *Sicilian Defense: Taimanov Variation, American Attack: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Nf6 6.Ndb5 Bb4 7.Nd6+ *B46 Sicilian, Taimanov Variation *Sicilian Defense: Taimanov Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 *B47 Sicilian, Taimanov (Bastrikov) Variation *Sicilian Defense: Taimanov Variation, Bastrikov Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 *Sicilian Defense: Taimanov Variation, Bastrikov Variation, Ponomariov Gambit: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Ndb5 Qb8 7.Be3 a6 8.Bb6 *B48 Sicilian, Taimanov Variation *Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 *B49 Sicilian, Taimanov Variation *Sicilian Defense: Taimanov Variation, Bastrikov Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 a6 7.Be2 *B50 [[Sicilian Defence]] *Sicilian Defense: Modern Variations: 1.e4 c5 2.Nf3 d6 *Sicilian Defense: Wing Gambit, Deferred Variation: 1.e4 c5 2.Nf3 d6 3.b4 *Sicilian Defense: Kopec System: 1.e4 c5 2.Nf3 d6 3.Bd3 *Sicilian Defense: Delayed Alapin Variation, with d6: 1.e4 c5 2.Nf3 d6 3.c3 *Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Gambit: 1.e4 c5 2.Nf3 d6 3.c3 Nf6 4.Be2 Nc6 5.d4 cxd4 6.cxd4 Nxe4 *Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Double Gambit: 1.e4 c5 2.Nf3 d6 3.c3 Nf6 4.Be2 Nc6 5.d4 cxd4 6.cxd4 Nxe4 7.d5 Qa5+ 8.Nc3 Nxc3 9.bxc3 *Sicilian Defense: 1.e4 c5 2.Nf3 d6 3.d4 *Sicilian Defense: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 *Sicilian Defense: Modern Variations, Tartakower: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.c3 *Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order: 1.e4 c5 2.Nf3 d6 3.d4 Nf6 *Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order Accepted: 1.e4 c5 2.Nf3 d6 3.d4 Nf6 4.dxc5 Nxe4 *Sicilian Defense: Kotov Gambit: 1.e4 c5 2.Nf3 d6 3.g3 b5 *B51 Sicilian, Canal–Sokolsky Attack *Sicilian Defense: Moscow Variation: 1.e4 c5 2.Nf3 d6 3.Bb5+ *Sicilian Defense: Moscow Variation, Moscow Gambit: 1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.0-0 Bd7 5.c3 Nf6 6.Re1 a6 7.Bxc6 Bxc6 8.d4 Bxe4 9.Bg5 *Sicilian Defense: Moscow Variation, Dorfman Gambit: 1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.0-0 Bd7 5.Qe2 g6 6.e5 *B52 Sicilian, Canal–Sokolsky Attack, 3...Bd7 *Sicilian Defense: Moscow Variation, Main Line: 1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 *Sicilian Defense: Moscow Variation, Sokolsky Variation: 1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Qxd7 5.c4 *Sicilian Defense: Moscow Variation, Haag Gambit: 1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Qxd7 5.0-0 Nc6 6.c3 Nf6 7.d4 *B53 Sicilian, Chekhover Variation *Sicilian Defense: Chekhover Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 *Sicilian Defense: Chekhover Variation, Zaitsev Defense: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Qd7 *B54 Sicilian *Sicilian Defense: Dragon Variation, Accelerated Dragon: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 g6 *Sicilian Defense: Modern Variations, Main Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 *Sicilian Defense: Modern Variations, Ginsberg Gambit: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Bc4 *Sicilian Defense: Prins Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 *B55 Sicilian, Prins Variation, Venice Attack *Sicilian Defense: Prins Variation, Venice Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 e5 6.Bb5+ *B56 Sicilian *Sicilian Defense: Kupreichik Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Bd7 *Sicilian Defense: Venice Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Bb5+ *Sicilian Defense: Classical Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 *Sicilian Defense: Classical Variation, Fianchetto Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.g3 *Sicilian Defense: Yates Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bd3 *Sicilian Defense: Spielmann Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Nde2 *B57 Sicilian, Sozin (not Scheveningen) including [[Magnus Smith Trap]] *Sicilian Defense: Classical Variation, Sozin Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 *Sicilian Defense: Magnus Smith Trap: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 g6 7.Nxc6 bxc6 8.e5 *Sicilian Defense: Classical Variation, Anti-Sozin Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 Qb6 *B58 Sicilian, Classical *Sicilian Defense: Classical Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 *Sicilian Defense: Boleslavsky Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 *Sicilian Defense: Classical Variation, Dragon Transfer: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 Nxd4 7.Qxd4 g6 *Sicilian Defense: Boleslavsky Variation, Louma Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 e5 7.Nxc6 *B59 Sicilian, Boleslavsky Variation, 7.Nb3 *Sicilian Defense: Boleslavsky Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 e5 7.Nb3 *B60 [[Sicilian, Richter–Rauzer]] *Sicilian Defense: Richter-Rauzer Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 *Sicilian Defense: Richter-Rauzer Variation, Modern Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 Bd7 *Sicilian Defense: Richter-Rauzer Variation, Dragon Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 g6 *B61 Sicilian, Richter–Rauzer, Larsen Variation, 7.Qd2 *Sicilian Defense: Richter-Rauzer Variation, Modern Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 Bd7 7.Qd2 *B62 Sicilian, Richter–Rauzer, 6...e6 *Sicilian Defense: Richter-Rauzer Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 *Sicilian Defense: Richter-Rauzer Variation, Vitolins Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Bb5 *Sicilian Defense: Richter-Rauzer Variation, Exchange Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Nxc6 *Sicilian Defense: Richter-Rauzer Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd3 *Sicilian Defense: Richter-Rauzer Variation, Podebrady Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Nb3 *B63 Sicilian, Richter–Rauzer, Rauzer Attack *Sicilian Defense: Richter-Rauzer Variation, Traditional Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 *Sicilian Defense: Richter-Rauzer Variation, Classical Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 *Sicilian Defense: Richter-Rauzer Variation, Classical Variation, Kantscher Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.0-0-0 Nxd4 9.Qxd4 a6 10.f4 b5 *Sicilian Defense: Richter-Rauzer Variation, Ivanov Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Qb6 *B64 Sicilian, Richter–Rauzer, Rauzer Attack, 7...Be7 defence, 9.f4 *Sicilian Defense: Richter-Rauzer Variation, Classical Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.0-0-0 0-0 9.f4 *Sicilian Defense: Richter-Rauzer Variation, Classical Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 Be7 8.0-0-0 0-0 9.f4 e5 *B65 Sicilian, Richter–Rauzer, Rauzer Attack, 7...Be7 defence, 9...Nxd4 *Sicilian Defense: Richter-Rauzer Variation, Rauzer Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.0-0-0 0-0 9.f4 Nxd4 *Sicilian Defense: Richter-Rauzer Variation, Classical Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.0-0-0 0-0 9.f4 Nxd4 10.Qxd4 *B66 Sicilian, Richter–Rauzer, Rauzer Attack, 7...a6 *Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 *B67 Sicilian, Richter–Rauzer, Rauzer Attack, 7...a6 defence, 8...Bd7 *Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 a6 8.0-0-0 Bd7 *B68 Sicilian, Richter–Rauzer, Rauzer Attack, 7...a6 defence, 9...Be7 *Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 a6 8.0-0-0 Bd7 9.f4 Be7 *B69 Sicilian, Richter–Rauzer, Rauzer Attack, 7...a6 defence, 11.Bxf6 *Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Nyezhmetdinov Attack: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 a6 8.0-0-0 Bd7 9.f4 Be7 10.Nf3 b5 11.Bxf6 *B70 [[Sicilian Defence, Dragon Variation|Sicilian, Dragon Variation]] *Sicilian Defense: Dragon Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 *Sicilian Defense: Dragon Variation, Classical Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 *Sicilian Defense: Dragon Variation, Fianchetto Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.g3 *B71 Sicilian, Dragon, Levenfish Attack *Sicilian Defense: Dragon Variation, Levenfish Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.f4 *Sicilian Defense: Dragon Variation, Levenfish Variation, Main Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.f4 Nbd7 *B72 Sicilian, Dragon, 6.Be3 *Sicilian Defense: Dragon Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 *Sicilian Defense: Dragon Variation, Classical Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 *Sicilian Defense: Dragon Variation, Classical Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 *Sicilian Defense: Dragon Variation, Classical Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.Be2 Nc6 8.Nb3 *Sicilian Defense: Dragon Variation, Classical Variation, Amsterdam Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 g6 7.Be3 Bg7 8.Qd2 *Sicilian Defense: Dragon Variation, Classical Variation, Grigoriev Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 g6 7.Be3 Bg7 8.Qd2 0-0 9.0-0-0 *B73 Sicilian, Dragon, Classical, 8.0-0 *Sicilian Defense: Dragon Variation, Classical Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.0-0 Nc6 8.Be3 *Sicilian Defense: Dragon Variation, Classical Variation, Battery Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.0-0 0-0 8.Be3 Nc6 9.Qd2 *Sicilian Defense: Dragon Variation, Classical Variation, Zollner Gambit: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Be3 Bg7 6.Be2 Nf6 7.Nc3 0-0 8.0-0 d6 9.f4 Qb6 10.e5 *B74 Sicilian, Dragon, Classical, 9.Nb3 *Sicilian Defense: Dragon Variation, Classical Variation, Stockholm Attack: 1.e4 c5 2.Nc3 d6 3.f4 Nc6 4.Nf3 g6 5.d4 cxd4 6.Nxd4 Bg7 7.Be3 Nf6 8.Be2 0-0 9.Nb3 Be6 10.0-0 Na5 11.f5 Bc4 12.Nxa5 Bxe2 13.Qxe2 Qxa5 14.g4 *Sicilian Defense: Dragon Variation, Classical Variation, Normal Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.0-0 0-0 8.Be3 Nc6 9.Nb3 *Sicilian Defense: Dragon Variation, Classical Variation, Maróczy Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.0-0 0-0 8.Be3 Nc6 9.Nb3 Be6 10.f4 Na5 *Sicilian Defense: Dragon Variation, Classical Variation, Tartakower Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.0-0 0-0 8.Be3 Nc6 9.Nb3 Be6 10.f4 Qc8 *Sicilian Defense: Dragon Variation, Classical Variation, Bernard Defense: 1.e4 c5 2.Nf3 g6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 Bg7 7.0-0 0-0 8.Be3 Nc6 9.Nb3 Be6 10.f4 Na5 11.f5 Bc4 12.Bd3 Bxd3 13.cxd3 d5 *Sicilian Defense: Dragon Variation, Classical Variation, Spielmann Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Be2 0-0 8.Nb3 d6 9.0-0 Be6 10.f4 Na5 11.f5 Bc4 12.Bd3 *Sicilian Defense: Dragon Variation, Classical Variation, Alekhine Line: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Be2 0-0 8.0-0 d6 9.Nb3 a5 *B75 Sicilian, Dragon, Yugoslav Attack *Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 *Sicilian Defense: Dragon Variation, Yugoslav Attack, Belezky Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 Nc6 *B76 [[Sicilian, Dragon, Yugoslav Attack, 7...0-0]] *Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 Nc6 8.Qd2 0-0 9.0-0-0 *Sicilian Defense: Dragon Variation, Yugoslav Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 *Sicilian Defense: Dragon Variation, Yugoslav Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 *Sicilian Defense: Dragon Variation, Yugoslav Attack, Panov Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.g4 *B77 [[Sicilian, Dragon, Yugoslav Attack, 9.Bc4]] *Sicilian Defense: Dragon Variation, Yugoslav Attack, Sosonko Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 Nc6 8.Qd2 0-0 9.Bc4 Nd7 *Sicilian Defense: Dragon Variation, Yugoslav Attack, Czerniak Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 Nc6 8.Qd2 0-0 9.Bc4 Nxd4 10.Bxd4 Be6 *Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.Bc4 *Sicilian Defense: Dragon Variation, Yugoslav Attack, Byrne Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.Bc4 a5 *Sicilian Defense: Dragon Variation, Yugoslav Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.Bc4 Bd7 *B78 [[Sicilian, Dragon, Yugoslav Attack, 10.0-0-0]] *Sicilian Defense: Dragon Variation, Yugoslav Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.Bc4 Bd7 10.0-0-0 *Sicilian Defense: Dragon Variation, Yugoslav Attack, Old Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.Bc4 Bd7 10.0-0-0 Rc8 *B79 Sicilian, Dragon, Yugoslav Attack, 12.h4 *Sicilian Defense: Dragon Variation, Yugoslav Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.Bc4 Bd7 10.h4 Qa5 11.0-0-0 Rfc8 12.Bb3 *Sicilian Defense: Dragon Variation, Yugoslav Attack, Soltis Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 0-0 8.Qd2 Nc6 9.Bc4 Bd7 10.0-0-0 Qa5 11.h4 Rfc8 12.Bb3 h5 *B80 [[Sicilian Defence, Scheveningen Variation|Sicilian, Scheveningen Variation]] *Sicilian Defense: Scheveningen Variation, English Attack, with Qd2: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e6 7.Qd2 *Sicilian Defense: Scheveningen Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 *Sicilian Defense: Scheveningen Variation, Vitolins Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bb5+ *Sicilian Defense: Scheveningen Variation, Fianchetto Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.g3 *B81 Sicilian, Scheveningen, Keres Attack *Sicilian Defense: Scheveningen Variation, Keres Attack: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.g4 *B82 Sicilian, Scheveningen, 6.f4 *Sicilian Defense: Scheveningen Variation, Matanovic Attack: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.f4 *Sicilian Defense: Scheveningen Variation, Tal Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.f4 Nc6 7.Be3 Be7 8.Qf3 *B83 Sicilian, Scheveningen, 6.Be2 *Sicilian Defense: Scheveningen Variation, Modern Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 d6 6.Be2 Nf6 *Sicilian Defense: Scheveningen Variation, Classical Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 *Sicilian Defense: Scheveningen Variation, Modern Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 Be7 7.0-0 0-0 8.f4 Nc6 9.Be3 *Sicilian Defense: Scheveningen Variation, Modern Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 Be7 7.0-0 0-0 8.f4 Nc6 9.Be3 Bd7 10.Nb3 *B84 Sicilian, Scheveningen (Paulsen), Classical Variation *Sicilian Defense: Scheveningen Variation, Classical Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e6 *Sicilian Defense: Najdorf Variation, Scheveningen Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e6 7.0-0 Nbd7 *Sicilian Defense: Scheveningen Variation, Classical Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e6 7.0-0 Qc7 *B85 Sicilian, Scheveningen, Classical Variation with ...Qc7 and ...Nc6 *Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 e6 7.Be2 Qc7 8.0-0 Nc6 *Sicilian Defense: Scheveningen Variation, Classical Main Line: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be2 a6 7.0-0 Nf6 8.Be3 Be7 9.f4 d6 10.Qe1 0-0 *Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be2 a6 7.0-0 Nf6 8.Be3 d6 9.f4 *Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be2 a6 7.0-0 Nf6 8.Kh1 Be7 9.f4 d6 10.a4 *B86 Sicilian, Sozin Attack *Sicilian Defense: Sozin Attack: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 *B87 Sicilian, Sozin with ...a6 and ...b5 *Sicilian Defense: Sozin Attack, Flank Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.Bb3 b5 *B88 Sicilian, Sozin, Leonhardt Variation *Sicilian Defense: Sozin Attack, Leonhardt Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 e6 *Sicilian Defense: Sozin Attack, Fischer Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 e6 7.Bb3 Be7 8.Be3 0-0 9.f4 *B89 [[Sicilian, Sozin, 7.Be3]] *Sicilian Defense: Sozin Attack, Main Line, Sherbakov Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 e6 7.Be3 Be7 8.Bb3 0-0 9.0-0 Na5 10.f4 b6 *Sicilian Defense: Sozin Attack, Main Line: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 e6 7.Be3 *Sicilian Defense: Velimirovic Attack: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 e6 7.Be3 Be7 8.Qe2 *B90 Sicilian, Najdorf *Sicilian Defense: Najdorf Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 *Sicilian Defense: Najdorf Variation, Lipnitsky Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 *Sicilian Defense: Najdorf Variation, English Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 *Sicilian Defense: Scheveningen Variation, English Attack, with f3: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e6 7.f3 *Sicilian Defense: Scheveningen Variation, Delayed Keres Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e6 7.g4 *Sicilian Defense: Scheveningen Variation, Delayed Keres Attack, Perenyi Gambit: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e6 7.g4 e5 8.Nf5 g6 9.g5 *Sicilian Defense: Najdorf Variation, English Attack, Anti-English: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 Ng4 *Sicilian Defense: Najdorf Variation, Dekker Gambit: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g4 *Sicilian Defense: Najdorf Variation, Adams Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.h3 *Sicilian Defense: Najdorf Variation, Freak Attack: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Rg1 *B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation (6.g3) *Sicilian Defense: Najdorf Variation, Zagreb Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3 *B92 Sicilian, Najdorf, Opocensky Variation (6.Be2) *Sicilian Defense: Najdorf Variation, Opocensky Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 *Sicilian Defense: Najdorf Variation, Opocensky Variation, Modern Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nb3 Be7 8.0-0 Be6 *Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nb3 Be7 8.0-0 0-0 *Sicilian Defense: Najdorf Variation, Opocensky Variation: 1.e4 c5 2.Nf3 Nf6 3.Nc3 d6 4.d4 cxd4 5.Nxd4 a6 6.Be2 e5 7.Nb3 Be6 8.Be3 *B93 Sicilian, Najdorf, 6.f4 *Sicilian Defense: Najdorf Variation, Amsterdam Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 *B94 Sicilian, Najdorf, 6.Bg5 *Sicilian Defense: Najdorf Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 *Sicilian Defense: Najdorf Variation, Ivkov Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 Nbd7 7.Bc4 Qa5 8.Qd2 e6 9.0-0-0 b5 10.Bb3 Bb7 11.Rhe1 Nc5 12.e5 *B95 Sicilian, Najdorf, 6...e6 *Sicilian Defense: Najdorf Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 *B96 Sicilian, Najdorf, 7.f4 *Sicilian Defense: Najdorf Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 *Sicilian Defense: Najdorf Variation, Polugaevsky Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 b5 *Sicilian Defense: Najdorf Variation, Polugaevsky Variation, Simagin Line: 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 *Sicilian Defense: Najdorf Variation, Neo-Classical Defense: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Nc6 *B97 Sicilian, Najdorf, 7...Qb6 including [[Poisoned Pawn Variation]] *Sicilian Defense: Najdorf Variation, Poisoned Pawn Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 *Sicilian Defense: Najdorf Variation, Poisoned Pawn Accepted: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2 Qxb2 9.Rb1 Qa3 *B98 Sicilian, Najdorf, 7...Be7 *Sicilian Defense: Najdorf Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 *Sicilian Defense: Najdorf Variation, Goteborg Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 h6 9.Bh4 g5 *Sicilian Defense: Najdorf Variation, Browne Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 h6 9.Bh4 Qc7 *Sicilian Defense: Najdorf Variation, Traditional Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7 *B99 [[Sicilian, Najdorf, 7...Be7 Main line]] *Sicilian Defense: Najdorf Variation, Main Line: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7 9.0-0-0 Nbd7
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