A – Flank openings
- White first moves other than 1.e4, 1.d4 (A00–A39)
- 1.d4 without 1...d5, 1...Nf6 or 1...f5: Atypical replies to 1.d4 (A40–A44)
- 1.d4 Nf6 without 2.c4: Atypical replies to 1...Nf6 (A45–A49)
- 1.d4 Nf6 2.c4 without 2...e6 or 2...g6: Atypical Indian systems (A50–A79)
- 1.d4 f5: Dutch Defence (A80–A99)
A00–A09
White first moves other than 1.e4, 1.d4, 1.c4:
- Anderssen's Opening: 1. a3
- Anderssen's Opening: Polish Gambit: 1. a3 a5 2. b4
- Formation: Hippopotamus Attack: 1. a3 e5 2. b3 d5 3. c3 Nf6 4. d3 Nc6 5. e3 Bd6 6. f3 O-O 7. g3
- Formation: Shy Attack: 1. a3 e5 2. g3 d5 3. Bg2 Nf6 4. d3 Nc6 5. Nd2 Bd6 6. e3 O-O 7. h3
- Van Geet Opening: Reversed Nimzowitsch, Battambang Variation: 1. a3 e5 2. Nc3
- Ware Opening: 1. a4
- Ware Opening: Symmetric Variation: 1. a4 a5
- Ware Opening: Wing Gambit: 1. a4 b5 2. axb5 Bb7
- Ware Opening: Cologne Gambit: 1. a4 b6 2. d4 d5 3. Nc3 Nd7
- Ware Opening: Ware Gambit: 1. a4 e5 2. a5 d5 3. e3 f5 4. a6
- Ware Opening: Crab Variation: 1. a4 e5 2. h4
- Ware Opening: Meadow Hay Trap: 1. a4 e5 2. Ra3
- Polish Opening: 1. b4
- Polish Opening: Symmetrical Variation: 1. b4 b5
- Polish Opening: Birmingham Gambit: 1. b4 c5
- Polish Opening: Outflank Variation: 1. b4 c6
- Polish Opening: Outflank, Schuehler Gambit: 1. b4 c6 2. Bb2 a5 3. b5 cxb5 4. e4
- Polish Opening: Baltic Defense: 1. b4 d5 2. Bb2 Bf5
- Polish Opening: Myers Variation: 1. b4 d5 2. Bb2 c6 3. a4
- Polish Opening: German Defense: 1. b4 d5 2. Bb2 Qd6
- Polish Opening: Bugayev Attack: 1. b4 e5 2. a3
- Polish Opening: Wolferts Gambit: 1. b4 e5 2. Bb2 c5
- Polish Opening: Czech Defense: 1. b4 e5 2. Bb2 d6
- Polish Opening: Bugayev Advance Variation: 1. b4 e5 2. Bb2 f6 3. b5
- Polish Opening: Tartakower Gambit: 1. b4 e5 2. Bb2 f6 3. e4
- Polish Opening: Queenside Defense: 1. b4 e6 2. Bb2 Nf6 3. b5 a6
- Polish Opening: Queenside Defense, Rooks Exchange Line: 1. b4 e6 2. Bb2 Nf6 3. b5 a6 4. a4 axb5 5. axb5 Rxa1 6. Bxa1
- Polish Opening: Queen's Indian Variation: 1. b4 e6 2. Bb2 Nf6 3. b5 b6
- Polish Opening: Schiffler-Sokolsky Variation: 1. b4 e6 2. Bb2 Nf6 3. b5 d5 4. e3
- Polish Opening: Dutch Defense: 1. b4 f5
- Polish Opening: Grigorian Variation: 1. b4 Nc6
- Polish Opening: King's Indian Variation: 1. b4 Nf6 2. Bb2 g6
- Polish Opening: King's Indian Variation, Sokolsky Attack: 1. b4 Nf6 2. Bb2 g6 3. c4 Bg7 4. e3 d6 5. Nf3 O-O 6. d4
- Polish Opening: King's Indian Variation, Schiffler Attack: 1. b4 Nf6 2. Bb2 g6 3. e4
- Polish Opening: Karniewski Variation: 1. b4 Nh6
- Saragossa Opening: 1. c3
- Mieses Opening: 1. d3
- Mieses Opening: Venezolana Variation: 1. d3 c5 2. Nc3 Nc6 3. g3
- Mieses Opening: Reversed Rat: 1. d3 e5
- Valencia Opening: 1. d3 e5 2. Nd2
- Mieses Opening: Myers Spike Attack: 1. d3 g6 2. g4
- Van't Kruijs Opening: 1. e3
- Van't Kruijs Opening: Bouncing Bishop Variation: 1. e3 e5 2. Bc4 b5 3. Bb3
- Amsterdam Attack: 1. e3 e5 2. c4 d6 3. Nc3 Nc6 4. b3 Nf6
- Van't Kruijs Opening: Keoni-Hiva Gambit, Ekolu Variation: 1. e3 e5 2. Nc3 d5 3. f4 exf4 4. Nf3
- Van't Kruijs Opening: Keoni-Hiva Gambit, Alua Variation: 1. e3 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3
- Van't Kruijs Opening: Keoni-Hiva Gambit, Akahi Variation: 1. e3 e5 2. Nc3 Nf6 3. f4 exf4 4. Nf3
- Barnes Opening: 1. f3
- Barnes Opening: Gedult Gambit: 1. f3 d5 2. e4 g6 3. d4 dxe4 4. c3
- Barnes Opening: Fool's Mate: 1. f3 e5 2. g4 Qh4#
- Barnes Opening: Hammerschlag: 1. f3 e5 2. Kf2
- Barnes Opening: Gedult Gambit: 1. f3 f5 2. e4 fxe4 3. Nc3
- Hungarian Opening: 1. g3
- Hungarian Opening: Sicilian Invitation: 1. g3 c5
- Hungarian Opening: Reversed Modern Defense: 1. g3 d5 2. Bg2 c5
- Hungarian Opening: Slav Formation: 1. g3 d5 2. Bg2 c6
- Hungarian Opening: Bücker Gambit: 1. g3 d5 2. Bg2 e5 3. b4
- Hungarian Opening: Winterberg Gambit: 1. g3 d5 2. Bg2 e5 3. c4 dxc4 4. b3
- Hungarian Opening: Catalan Formation: 1. g3 d5 2. Bg2 e6
- Hungarian Opening: Burk Gambit: 1. g3 e5 2. a3 d5 3. Nf3 e4 4. Nh4 Be7 5. d3
- Hungarian Opening: Reversed Alekhine: 1. g3 e5 2. Nf3
- Hungarian Opening: Reversed Brooklyn Defense, Brooklyn Benko Gambit: 1. g3 e5 2. Nf3 e4 3. Ng1 Nf6 4. b4
- Hungarian Opening: Reversed Norwegian Defense: 1. g3 e5 2. Nf3 e4 3. Nh4
- Hungarian Opening: Paris Gambit: 1. g3 e5 2. Nh3 d5 3. f4 Bxh3 4. Bxh3 exf4 5. O-O
- Hungarian Opening: Dutch Defense: 1. g3 f5
- Hungarian Opening: Pachman Gambit: 1. g3 f5 2. e4 fxe4 3. Qh5+ g6
- Hungarian Opening: Myers Defense: 1. g3 g5
- Hungarian Opening: Symmetrical Variation: 1. g3 g6
- Lasker Simul Special: 1. g3 h5
- Hungarian Opening: Van Kuijk Gambit: 1. g3 h5 2. Nf3 h4
- Hungarian Opening: Asten Gambit: 1. g3 Nc6 2. Nc3 d5 3. d4 e5 4. dxe5 d4 5. Ne4 f5
- Hungarian Opening: Indian Defense: 1. g3 Nf6
- Grob Opening: 1. g4
- Grob Opening: Grob Gambit: 1. g4 d5 2. Bg2
- Grob Opening: Grob Gambit, Fritz Gambit: 1. g4 d5 2. Bg2 Bxg4 3. c4
- Grob Opening: Romford Countergambit: 1. g4 d5 2. Bg2 Bxg4 3. c4 d4
- Grob Opening: Grob Gambit, Fritz Gambit, Romford Countergambit: 1. g4 d5 2. Bg2 Bxg4 3. c4 d4 4. Bxb7 Nd7 5. Bxa8 Qxa8
- Grob Opening: Grob Gambit Declined: 1. g4 d5 2. Bg2 c6
- Grob Opening: Grob Gambit, Richter-Grob Gambit: 1. g4 d5 2. Bg2 c6 3. c4 dxc4 4. b3
- Grob Opening: Spike Attack: 1. g4 d5 2. Bg2 c6 3. g5
- Grob Opening: Grob Gambit, Keres Gambit: 1. g4 d5 2. Bg2 e5 3. d4 exd4 4. c3
- Grob Opening: Grob Gambit, Basman Gambit: 1. g4 d5 2. Bg2 h5 3. gxh5
- Grob Opening: Zilbermints Gambit: 1. g4 d5 2. e4 dxe4 3. Nc3
- Grob Opening: Zilbermints Gambit, Zilbermints-Hartlaub Gambit: 1. g4 d5 2. e4 dxe4 3. Nc3 e5 4. d3
- Grob Opening: Zilbermints Gambit, Schiller Defense: 1. g4 d5 2. e4 dxe4 3. Nc3 h5
- Grob Opening: Keene Defense: 1. g4 d5 2. h3 e5 3. Bg2 c6
- Grob Opening: Keene Defense, Main Line: 1. g4 d5 2. h3 e5 3. Bg2 c6 4. d4 e4 5. c4 Bd6 6. Nc3 Ne7
- Grob Opening: Spike, Hurst Attack: 1. g4 e5 2. Bg2 d5 3. c4
- Grob Opening: London Defense: 1. g4 e5 2. h3 Nc6
- Grob Opening: Alessi Gambit: 1. g4 f5
- Grob Opening: Double Grob: 1. g4 g5
- Grob Opening: Double Grob, Coca-Cola Gambit: 1. g4 g5 2. f4
- Clemenz Opening: 1. h3
- Creepy Crawly Formation: Classical Defense: 1. h3 d5 2. a3 e5
- Global Opening: 1. h3 e5 2. a3
- Clemenz Opening: Spike Lee Gambit: 1. h3 h5 2. g4
- Kádas Opening: 1. h4
- Kádas Opening: Koola-Koola Variation: 1. h4 a5
- Kádas Opening: Kádas Gambit: 1. h4 c5 2. b4
- Kádas Opening: Myers Variation: 1. h4 d5 2. d4 c5 3. e4
- Kádas Opening: Kádas Gambit: 1. h4 d5 2. d4 c5 3. Nf3 cxd4 4. c3
- Kádas Opening: Beginner's Trap: 1. h4 d5 2. Rh3
- Kádas Opening: Kádas Gambit: 1. h4 e5 2. d4 exd4 3. c3
- Kádas Opening: Steinbok Gambit: 1. h4 f5 2. e4 fxe4 3. d3
- Kádas Opening: Schneider Gambit: 1. h4 g5
- Sodium Attack: 1. Na3
- Sodium Attack: Celadon Variation: 1. Na3 e5 2. d3 Bxa3 3. bxa3 d5 4. e3 c5 5. Rb1
- Sodium Attack: Durkin Gambit: 1. Na3 e5 2. Nc4 Nc6 3. e4 f5
- Sodium Attack: Chenoboskion Variation: 1. Na3 g6 2. g4
- Van Geet Opening: 1. Nc3
- Van Geet Opening: Laroche Gambit: 1. Nc3 b5
- Van Geet Opening: Düsseldorf Gambit: 1. Nc3 c5 2. b4
- Van Geet Opening: Novosibirsk Variation: 1. Nc3 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qh4
- Van Geet Opening: Sicilian Two Knights: 1. Nc3 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4
- Van Geet Opening: Twyble Attack: 1. Nc3 c5 2. Rb1
- Van Geet Opening: Venezolana Variation: 1. Nc3 d5 2. d3 Nf6 3. g3
- Van Geet Opening: Sleipnir Gambit: 1. Nc3 d5 2. e3 e5 3. d4 Bb4
- Van Geet Opening: Hector Gambit: 1. Nc3 d5 2. e4 dxe4 3. Bc4
- Van Geet Opening: Dunst-Perrenet Gambit: 1. Nc3 d5 2. e4 dxe4 3. d3
- Van Geet Opening: Dougherty Gambit: 1. Nc3 d5 2. e4 dxe4 3. f3
- Van Geet Opening: Melleby Gambit: 1. Nc3 d5 2. f4 d4 3. Ne4 c5
- Van Geet Opening: Pfeiffer Gambit: 1. Nc3 d5 2. f4 d4 3. Ne4 e5
- Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit: 1. Nc3 d5 2. f4 d4 3. Ne4 e5 4. Nf3
- Van Geet Opening: Jendrossek Gambit: 1. Nc3 d5 2. f4 d4 3. Ne4 f5 4. Nf2 Nf6 5. Nf3 c5 6. b4
- Van Geet Opening: Damhaug Gambit: 1. Nc3 d5 2. f4 e5
- Van Geet Opening: Warsteiner Gambit: 1. Nc3 d5 2. f4 g5
- Van Geet Opening: Hergert Gambit: 1. Nc3 d6 2. f4 e5 3. fxe5 Nc6
- Van Geet Opening: Reversed Nimzowitsch: 1. Nc3 e5
- Van Geet Opening: Gladbacher Gambit: 1. Nc3 e5 2. b3 d5 3. e4 dxe4 4. d3
- Van Geet Opening: Reversed Scandinavian: 1. Nc3 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qa4
- Van Geet Opening: Hulsemann Gambit: 1. Nc3 e5 2. e3 d5 3. Qh5 Be6
- Van Geet Opening: Liebig Gambit: 1. Nc3 e5 2. e3 d5 3. Qh5 Nf6
- Van Geet Opening: Nowokunski Gambit: 1. Nc3 e5 2. f4 exf4 3. e4
- Van Geet Opening: Billockus-Johansen Gambit: 1. Nc3 e5 2. Nf3 Bc5
- Van Geet Opening: Napoleon Attack: 1. Nc3 e5 2. Nf3 Nc6 3. d4
- Van Geet Opening: Kluever Gambit: 1. Nc3 f5 2. e4 fxe4 3. d3
- Van Geet Opening: Myers Attack: 1. Nc3 g6 2. h4
- Van Geet Opening: Tübingen Gambit: 1. Nc3 Nf6 2. g4
- Amar Opening: 1. Nh3
- Amar Opening: Paris Gambit: 1. Nh3 d5 2. g3 e5 3. f4
- Amar Opening: Paris Gambit, Gent Gambit: 1. Nh3 d5 2. g3 e5 3. f4 Bxh3 4. Bxh3 exf4 5. O-O fxg3 6. hxg3
- Nimzo-Larsen Attack: 1. b3
- Nimzo-Larsen Attack: Polish Variation: 1. b3 b5
- Nimzo-Larsen Attack: Symmetrical Variation: 1. b3 b6
- Nimzo-Larsen Attack: English Variation: 1. b3 c5
- Nimzo-Larsen Attack: Classical Variation: 1. b3 d5
- Nimzo-Larsen Attack: Graz Attack: 1. b3 d5 2. Ba3
- Nimzo-Larsen Attack: Modern Variation: 1. b3 e5
- Nimzo-Larsen Attack: Modern Variation: 1. b3 e5 2. Bb2 Nc6
- Nimzo-Larsen Attack: Modern Variation: 1. b3 e5 2. Bb2 Nc6 3. c4 Nf6
- Nimzo-Larsen Attack: Modern Variation: 1. b3 e5 2. Bb2 Nc6 3. e3
- Nimzo-Larsen Attack: Pachman Gambit: 1. b3 e5 2. Bb2 Nc6 3. f4
- Nimzo-Larsen Attack: Dutch Variation: 1. b3 f5
- Nimzo-Larsen Attack: Ringelbach Gambit: 1. b3 f5 2. Bb2 e6 3. e4
- Nimzo-Larsen Attack: Indian Variation: 1. b3 Nf6
- Nimzo-Larsen Attack: Spike Variation: 1. b3 Nf6 2. Bb2 g6 3. g4
A02
- Bird Opening: 1. f4
- Bird Opening: Myers Defense: 1. f4 b5
- Bird Opening: From's Gambit: 1. f4 e5
- Bird Opening: Siegener Gambit: 1. f4 e5 2. d4 exd4 3. Nf3 c5 4. c3
- Bird Opening: From's Gambit, Lasker Variation: 1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 g5
- Bird Opening: From's Gambit, Lipke Variation: 1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 Nh6 5. d4
- Bird Opening: From's Gambit, Langheld Gambit: 1. f4 e5 2. fxe5 d6 3. exd6 Nf6
- Bird Opening: Lasker Gambit: 1. f4 e5 2. fxe5 f6
- Bird Opening: Schlechter Gambit: 1. f4 e5 2. fxe5 Nc6
- Bird Opening: Platz Gambit: 1. f4 e5 2. fxe5 Ne7
- Bird Opening: From's Gambit, Bahr Gambit: 1. f4 e5 2. Nc3
- Bird Opening: Double Duck Formation: 1. f4 f5 2. d4 d5
- Bird Opening: Wagner-Zwitersch Gambit: 1. f4 f5 2. e4
- Bird Opening: Swiss Gambit: 1. f4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4
- Bird Opening: Hobbs Gambit: 1. f4 g5
- Bird Opening: Hobbs-Zilbermints Gambit: 1. f4 h6 2. Nf3 g5
- Bird Opening: Mujannah: 1. f4 Nf6 2. c4
- Bird Opening: Batavo-Polish Attack: 1. f4 Nf6 2. Nf3 g6 3. b4
- Bird Opening: Horsefly Defense: 1. f4 Nh6
A03 Bird's Opening, Dutch Variation:
- Bird Opening: Dutch Variation: 1. f4 d5
- Bird Opening: Thomas Gambit: 1. f4 d5 2. b3 Nf6 3. Bb2 d4 4. Nf3 c5 5. e3
- Bird Opening: Sturm Gambit: 1. f4 d5 2. c4
- Bird Opening: Williams Gambit: 1. f4 d5 2. e4
- Bird Opening: Williams-Zilbermints Gambit: 1. f4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Nge2
- Bird Opening: Williams Gambit: 1. f4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Qe2
- Bird Opening: Dutch Variation, Dudweiler Gambit: 1. f4 d5 2. g4
- Bird Opening: Lasker Variation: 1. f4 d5 2. Nf3 Nf6 3. e3 c5
A04
- Zukertort Opening: 1. Nf3
- Zukertort Opening: Ware Defense: 1. Nf3 a5
- Zukertort Opening: St. George Defense: 1. Nf3 a6
- Zukertort Opening: Polish Defense: 1. Nf3 b5
- Zukertort Opening: Queenside Fianchetto Variation: 1. Nf3 b6
- Zukertort Opening: Sicilian Invitation: 1. Nf3 c5
- Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation: 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qa5+
- Modern Defense: Semi-Averbakh Variation, Polish Variation: 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qb6
- Zukertort Opening: Speelsmet Gambit: 1. Nf3 c5 2. d4 cxd4 3. e3
- Colle System: Rhamphorhynchus Variation: 1. Nf3 c5 2. e3 g6 3. d4 Bg7 4. dxc5 Qa5+
- Zukertort Opening: Slav Invitation: 1. Nf3 c6
- Zukertort Opening: Pirc Invitation: 1. Nf3 d6
- Zukertort Opening: Vos Gambit: 1. Nf3 d6 2. d4 e5
- Zukertort Opening: Wade Defense: 1. Nf3 d6 2. e4 Bg4
- Zukertort Opening: Ross Gambit: 1. Nf3 e5
- Zukertort Opening: The Walrus: 1. Nf3 e5 2. Nxe5 Nc6 3. Nxc6 dxc6
- Zukertort Opening: Queen's Gambit Invitation: 1. Nf3 e6
- Zukertort Opening: Shabalov Gambit: 1. Nf3 e6 2. c4 a6 3. Nc3 c5 4. g3 b5
- Zukertort Opening: Dutch Variation: 1. Nf3 f5
- Zukertort Opening: Lisitsyn Gambit Deferred: 1. Nf3 f5 2. d3 Nf6 3. e4
- Zukertort Opening: Lisitsyn Gambit: 1. Nf3 f5 2. e4
- Zukertort Opening: Arctic Defense: 1. Nf3 f6
- Zukertort Opening: Arctic Defense, Drunken Knight Variation: 1. Nf3 f6 2. e4 Nh6 3. d4 Nf7
- Zukertort Opening: Herrstrom Gambit: 1. Nf3 g5
- Zukertort Opening: Kingside Fianchetto: 1. Nf3 g6
- Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation Accepted: 1. Nf3 g6 2. d4 Bg7 3. e4 d6 4. c4 c5 5. dxc5 Qa5+
- Zukertort Opening: Basman Defense: 1. Nf3 h6
- Zukertort Defense: Sicilian Knight Variation: 1. Nf3 Na6 2. e4 c5
- Zukertort Opening: Drunken Cavalry Variation: 1. Nf3 Na6 2. e4 Nh6
- Zukertort Opening: Black Mustang Defense: 1. Nf3 Nc6
- Zukertort Defense: Kingside Variation: 1. Nf3 Nh6 2. d4 g6
A05 Réti Opening: 1...Nf6
- Zukertort Opening: 1. Nf3 Nf6
- Zukertort Opening: Myers Polish Attack: 1. Nf3 Nf6 2. a4 g6 3. b4
- Zukertort Opening: Nimzo-Larsen Variation: 1. Nf3 Nf6 2. b3
- Polish Opening: Zukertort System: 1. Nf3 Nf6 2. b4
- Zukertort Opening: Quiet System: 1. Nf3 Nf6 2. e3
- Zukertort Opening: Lemberger Gambit: 1. Nf3 Nf6 2. e4
- King's Indian Attack: Spassky Variation: 1. Nf3 Nf6 2. g3 b5
- King's Indian Attack: 1. Nf3 Nf6 2. g3 d5
- King's Indian Attack: Symmetrical Defense: 1. Nf3 Nf6 2. g3 g6
- Zukertort Opening: Double Fianchetto Attack: 1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 d6 6. O-O
- King's Indian Attack: Smyslov Variation: 1. Nf3 Nf6 2. g3 g6 3. b4
- King's Indian Attack: Wahls Defense: 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d3 d5
- Zukertort Opening: 1. Nf3 Nf6 2. Nc3 Nc6
A06 Réti Opening: 1...d5
- Zukertort Opening: Santasiere's Folly: 1. b4 d5 2. Nf3
- Zukertort Opening: Tennison Gambit: 1. e4 d5 2. Nf3
- Zukertort Opening: 1. Nf3 d5
- Zukertort Opening: The Potato: 1. Nf3 d5 2. a4
- Nimzo-Larsen Attack: Classical Variation: 1. Nf3 d5 2. b3
- Zukertort Opening: Regina-Nu Gambit: 1. Nf3 d5 2. b3 c5 3. c4 dxc4 4. Nc3
- Nimzo-Larsen Attack: Norfolk Gambit: 1. Nf3 d5 2. b3 c5 3. e4
- Nimzo-Larsen Attack: Norfolk Gambit: 1. Nf3 d5 2. b3 Nf6 3. Bb2 c5 4. e4
- Zukertort Opening: Old Indian Attack: 1. Nf3 d5 2. d3
- Zukertort Opening: Pachman Gambit: 1. Nf3 d5 2. e3 c5 3. c4 dxc4 4. b3
- Zukertort Opening: Reversed Mexican Defense: 1. Nf3 d5 2. Nc3
- Zukertort Opening: Ampel Variation: 1. Nf3 d5 2. Rg1
A07 Réti Opening, King's Indian Attack (Barcza System):
- Hungarian Opening: Wiedenhagen-Beta Gambit: 1. g3 d5 2. Nf3 g5
- King's Indian Attack: 1. Nf3 d5 2. g3
- King's Indian Attack: Keres Variation: 1. Nf3 d5 2. g3 Bg4
- King's Indian Attack: Keres Variation: 1. Nf3 d5 2. g3 Bg4 3. Bg2 Nd7
- King's Indian Attack: Sicilian Variation: 1. Nf3 d5 2. g3 c5
- King's Indian Attack: Omega-Delta Gambit: 1. Nf3 d5 2. g3 e5
- King's Indian Attack: Double Fianchetto: 1. Nf3 d5 2. g3 g6
- King's Indian Attack: Pachman System: 1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. O-O e5 5. d3 Ne7
- King's Indian Attack: Yugoslav Variation: 1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bg4
A08 Réti Opening, King's Indian Attack:
- King's Indian Attack: Sicilian Variation: 1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 c5 5. g3 Nc6 6. Bg2 Be7 7. O-O O-O 8. Re1
- King's Indian Attack: Sicilian Variation: 1. Nf3 d5 2. g3 c5 3. Bg2
- King's Indian Attack: French Variation: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6
- Zukertort Opening: Reversed Grünfeld: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4
- Zukertort Opening: Reversed Grünfeld: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 e6 5. O-O
- Zukertort Opening: Reversed Grünfeld: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 Nf6
- Zukertort Opening: Reversed Grünfeld: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 Nf6 5. O-O
- King's Indian Attack: Sicilian Variation: 1. Nf3 d5 2. g3 c5 3. Bg2 Nf6 4. O-O e6 5. d3
A09 Réti Opening:
- Réti Opening: 1. Nf3 d5 2. c4
- Réti Opening: Zilbermints Gambit: 1. Nf3 d5 2. c4 b5
- Réti Opening: Advance Variation: 1. Nf3 d5 2. c4 d4
- Réti Opening: Advance Variation, Michel Gambit: 1. Nf3 d5 2. c4 d4 3. b4 c5
- Réti Opening: Reversed Blumenfeld Gambit: 1. Nf3 d5 2. c4 d4 3. e3 c5 4. b4
- Réti Opening: Penguin Variation: 1. Nf3 d5 2. c4 d4 3. Rg1
- Réti Opening: Réti Gambit: 1. Nf3 d5 2. c4 dxc4
- Réti Opening: Réti Gambit, Keres Variation: 1. Nf3 d5 2. c4 dxc4 3. e3 Be6
A10–A39
1.c4: English Opening
A10: 1.c4 (without: 1...g6 2.d4, 1...f5 2.d4, 1...b6 2.d4, 1...d6 2.e4, 1...d6 2.d4, 1...Nc6 2.d4)
- English Opening: 1. c4
- English Opening: Jaenisch Gambit: 1. c4 b5
- English Opening: Anglo-Scandinavian Defense: 1. c4 d5
- English Opening: Anglo-Scandinavian Defense, Löhn Gambit: 1. c4 d5 2. cxd5 e6
- English Opening: Anglo-Scandinavian Defense, Schulz Gambit: 1. c4 d5 2. cxd5 Nf6
- English Opening: Anglo-Scandinavian Defense, Malvinas Variation: 1. c4 d5 2. cxd5 Qxd5 3. Nc3 Qa5
- English Opening: Anglo-Dutch Defense: 1. c4 f5
- English Opening: Anglo-Dutch Defense, Hickmann Gambit: 1. c4 f5 2. e4
- English Opening: Wade Gambit: 1. c4 f5 2. g4
- English Opening: Anglo-Dutch Variation, Ferenc Gambit: 1. c4 f5 2. Nc3 Nf6 3. e4
- English Opening: Porcupine Variation: 1. c4 f5 2. Nc3 Nf6 3. e4 fxe4 4. g4
- English Opening: Anglo-Dutch Variation, Chabanon Gambit: 1. c4 f5 2. Nf3 d6 3. e4
- English Opening: Myers Defense: 1. c4 g5
- English Opening: Myers Gambit: 1. c4 g5 2. d4 Bg7
- English Opening: Zilbermints Gambit: 1. c4 g5 2. d4 e5
- English Opening: Great Snake Variation: 1. c4 g6
- English Opening: Adorjan Defense: 1. c4 g6 2. e4 e5
- English Opening: King's English Variation, Botvinnik System, Prickly Pawn Pass System: 1. c4 g6 2. Nc3 Bg7 3. g3 Nf6 4. Bg2 O-O 5. e4 d6 6. Nge2 e5 7. O-O c6 8. d3 a6
- English Opening: Anglo-Lithuanian Variation: 1. c4 Nc6
- English Opening: Achilles-Omega Gambit: 1. c4 Nf6 2. e4
A11 English, Caro–Kann defensive system, 1...c6 (without: 2.e4, 2.d4)
- English Opening: Caro-Kann Defensive System: 1. c4 c6
A12 English, Caro–Kann defensive system: 2.Nf3 d5 3.b3
- Réti Opening: Anglo-Slav Variation, London Defensive System: 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5
- Réti Opening: Anglo-Slav Variation, Torre System: 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bg4
- Réti Opening: Anglo-Slav Variation, Capablanca Variation: 1. c4 Nf6 2. Nf3 c6 3. b3 d5 4. Bb2 Bg4
- Réti Opening: Anglo-Slav Variation, Bled Variation: 1. Nf3 d5 2. b3 Nf6 3. Bb2 g6 4. c4 c6
- Réti Opening: Anglo-Slav Variation, Bogoljubow Variation: 1. Nf3 d5 2. c4 c6 3. b3
- Réti Opening: Anglo-Slav Variation, Bogoljubow Variation: 1. Nf3 d5 2. c4 c6 3. b3 Bg4
- Réti Opening: Anglo-Slav Variation, Bogoljubow Variation: 1. Nf3 Nf6 2. c4 c6 3. b3 d5 4. Bb2
- Réti Opening: Anglo-Slav Variation, New York System: 1. Nf3 Nf6 2. c4 c6 3. b3 d5 4. Bb2 Bf5
A13 English Opening: 1...e6 (without 2.e4 or 2.d4)
- English Opening: Agincourt Defense: 1. c4 e6
- English Opening: Agincourt Defense: 1. c4 e6 2. Nf3
- English Opening: Agincourt Defense: 1. c4 e6 2. Nf3 d5
- English Opening: Agincourt Defense, Catalan Defense: 1. c4 e6 2. Nf3 d5 3. g3 b6 4. Bg2 Bb7 5. O-O
- English Opening: Agincourt Defense, Catalan Defense: 1. c4 e6 2. Nf3 d5 3. g3 c5
- English Opening: Agincourt Defense, Kurajica Defense: 1. c4 e6 2. Nf3 d5 3. g3 c6
- English Opening: Neo-Catalan: 1. c4 e6 2. Nf3 d5 3. g3 Nf6
- English Opening: Agincourt Defense, Bogoljubow Defense: 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Bd6
- English Opening: Neo-Catalan Declined: 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7
- English Opening: Agincourt Defense, Tarrasch Defense: 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 c5 5. b3 Nc6 6. O-O Be7
- English Opening: Agincourt Defense, Wimpy System: 1. c4 e6 2. Nf3 Nf6 3. b3 d5 4. Bb2 c5 5. e3
- English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense: 1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 c6
- English Opening: Agincourt Defense, Catalan Defense Accepted: 1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 dxc4
- English Opening: Romanishin Gambit: 1. c4 Nf6 2. Nf3 e6 3. g3 a6 4. Bg2 b5
A14 English, Neo-Catalan Declined: 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7
- English Opening: Agincourt Defense, Neo-Catalan Declined: 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O
- English Opening: Agincourt Defense, Keres Defense: 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O c5 6. cxd5 Nxd5 7. Nc3 Nc6
- Réti Opening: Anglo-Slav Variation, Bogoljubow Variation, Stonewall Line: 1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. b3 c6 7. Bb2
A15 English, Anglo-Indian Defence: 1...Nf6 (without: 2.d4, 2.g3 c6, 2.g3 e5, 2.Nf3 c5, 2.Nf3 e6, 2.Nf3 c6)
- English Opening: Anglo-Indian Defense, Romanishin Variation: 1. c4 e6 2. Nf3 Nf6 3. g3 a6
- English Opening: Anglo-Indian Defense, Queen's Indian Formation: 1. c4 e6 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7
- English Opening: Anglo-Indian Defense: 1. c4 Nf6
- English Orangutan: 1. c4 Nf6 2. b4
- English Opening: Anglo-Indian Defense, Anti-Anti-Grünfeld: 1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 4. e4
- English Opening: Anglo-Indian Defense, King's Knight Variation: 1. c4 Nf6 2. Nf3
- English Opening: Anglo-Indian Defense, Queen's Indian Formation: 1. c4 Nf6 2. Nf3 b6
- English Opening: Anglo-Indian Defense, Scandinavian Defense: 1. c4 Nf6 2. Nf3 d5
- English Opening: Anglo-Indian Defense, Scandinavian Defense, Exchange Variation: 1. c4 Nf6 2. Nf3 d5 3. cxd5 Nxd5
- English Opening: Anglo-Indian Defense, Old Indian Formation: 1. c4 Nf6 2. Nf3 d6
- English Opening: Anglo-Indian Defense, King's Indian Formation: 1. c4 Nf6 2. Nf3 g6
- English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto: 1. c4 Nf6 2. Nf3 g6 3. g3 b6 4. Bg2 Bb7
- English Opening: Anglo-Indian Defense, Slav Formation: 1. c4 Nf6 2. Nf3 g6 3. g3 c6
- English Opening: Anglo-Indian Defense, Grünfeld Formation: 1. c4 Nf6 2. Nf3 g6 3. g3 d5
A16 English Opening, Anglo-Indian Defence: 2.Nc3 (without: 2...c5, 2...e5, 2...e6)
- English Opening: Anglo-Indian Defense, Queen's Knight Variation: 1. c4 Nf6 2. Nc3
- English Opening: Anglo-Grünfeld Defense: 1. c4 Nf6 2. Nc3 d5
- English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nb6
- English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nxc3
- English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3
- English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 g6
- English Opening: Anglo-Grünfeld Defense, Korchnoi Variation: 1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 g6 5. g3 Bg7 6. Bg2 e5
A17 English Opening, Hedgehog Defence: 2...e6 (without: 3.d4, 3.Nf3 c5, 3...d5 4.d4, 3...b5 4.d4, 3...Bb4 4.d4)
- English Opening: Anglo-Indian Defense, Queen's Indian Formation: 1. c4 e6 2. Nc3 Nf6 3. Nf3 b6
- English Opening: Anglo-Indian Defense, Queen's Indian Variation: 1. c4 e6 2. Nc3 Nf6 3. Nf3 b6 4. e4 Bb7 5. Bd3
- English Opening: Anglo-Indian Defense, Zvjaginsev-Krasenkow Attack: 1. c4 e6 2. Nc3 Nf6 3. Nf3 Bb4 4. g4
- English Opening: Anglo-Indian Defense, Hedgehog System: 1. c4 Nf6 2. Nc3 e6
- English Opening: Anglo-Indian Defense, Nimzo-English: 1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4
A18 English, Mikenas–Carls Variation: 3.e4 (without: 3...c5)
- English Opening: Mikenas-Carls Variation: 1. c4 e6 2. Nc3 Nf6 3. e4
- English Opening: Mikenas-Carls Variation: 1. c4 e6 2. Nc3 Nf6 3. e4 d5 4. e5
- English Opening: Mikenas-Carls Variation: 1. c4 e6 2. Nc3 Nf6 3. e4 Nc6
A19 English, Mikenas–Carls, Sicilian Variation: 3...c5
- English Opening: Mikenas-Carls, Sicilian: 1. c4 e6 2. Nc3 Nf6 3. e4 c5
- English Opening: Anglo-Indian Defense, Flohr-Mikenas-Carls Variation, Nei Gambit: 1. c4 e6 2. Nc3 Nf6 3. e4 c5 4. e5 Ng8
A20 English Opening: 1...e5 (without: 2.e4, 2.Nf3 Nc6 3.Nc3, 2.Nf3 Nf6 3.Nc3, 2.Nf3 d6 3.Nc3)
- English Opening: King's English Variation: 1. c4 e5
- English Opening: King's English Variation, Kahiko-Hula Gambit: 1. c4 e5 2. e3 Nf6 3. f4 exf4 4. Nf3
- English Opening: Drill Variation: 1. c4 e5 2. g3 h5
- English Opening: King's English Variation, Nimzowitsch Variation: 1. c4 e5 2. Nf3
- English Opening: King's English Variation, Nimzowitsch-Flohr Variation: 1. c4 e5 2. Nf3 e4
A21 English Opening: 2.Nc3 (without: 2...Nf6, 2...Nc6, 2...Bb4 3.g3 Nf6, 2...Bb4 3.Nf3 Nc6 2...Bb4 3.e3 Nf6)
- English Opening: King's English Variation, Reversed Sicilian: 1. c4 e5 2. Nc3
- English Opening: King's English Variation, Kramnik-Shirov Counterattack: 1. c4 e5 2. Nc3 Bb4
- English Opening: King's English Variation, Keres Defense: 1. c4 e5 2. Nc3 d6 3. g3 c6
- English Opening: King's English Variation: 1. c4 e5 2. Nc3 d6 3. Nf3
- English Opening: King's English Variation, Smyslov Defense: 1. c4 e5 2. Nc3 d6 3. Nf3 Bg4
- English Opening: King's English Variation, Troger Defense: 1. c4 e5 2. Nc3 Nc6 3. g3 d6 4. Bg2 Be6
A22 English Opening: 2...Nf6 (without: 3.Nf3 Nc6, 3.e3 Nc6, 3.g3 Nc6, 3.g3 c6, 3.g3 g6, 3.e4 Nc6 4.Nf3)
- English Opening: King's English Variation, Two Knights Variation: 1. c4 e5 2. Nc3 Nf6
- English Opening: King's English, Mazedonisch: 1. c4 e5 2. Nc3 Nf6 3. f4
- English Opening: Carls-Bremen System: 1. c4 e5 2. Nc3 Nf6 3. g3
- English Opening: King's English Variation, Two Knights Variation, Smyslov System: 1. c4 e5 2. Nc3 Nf6 3. g3 Bb4
- English Opening: King's English Variation, Two Knights Variation, Reversed Dragon: 1. c4 e5 2. Nc3 Nf6 3. g3 d5
- English Opening: King's English Variation, Bellon Gambit: 1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 b5
- English Opening: King's English Variation, Adhiban Gambit: 1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 c6
- English Opening: King's English, Erbenheimer Gambit: 1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 Ng4
A23 English Opening, Bremen System, Keres Variation: 3.g3 c6
- English Opening: King's English Variation, Two Knights Variation, Keres Variation: 1. c4 e5 2. Nc3 Nf6 3. g3 Bc5 4. Bg2 c6
- English Opening: King's English Variation, Two Knights Variation, Keres Variation: 1. c4 e5 2. Nc3 Nf6 3. g3 c6
A24 English Opening, Bremen System with 1...e5 2.Nc3 Nf6 3.g3 g6 (without: 4.Bg2 Bg7 5.d3 d6): 3.g3 g6
- English Opening: King's English Variation, Two Knights Variation, Fianchetto Line: 1. c4 e5 2. Nc3 Nf6 3. g3 g6
A25 English Opening, Sicilian Reversed: 2...Nc6 (without 3.e3 Nf6 4.Nf3)
- English Opening: King's English Variation, Reversed Closed Sicilian: 1. c4 e5 2. Nc3 Nc6
- English Opening: King's English Variation, Taimanov Variation: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7
- English Opening: King's English Variation, Closed System: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3
- English Opening: King's English Variation, Bremen-Hort Variation: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Be6
- English Opening: Closed, Taimanov Variation: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Nh6
- English Opening: King's English Variation, Hungarian Attack: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Rb1
- English Opening: Closed, Taimanov Variation: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Rb1 Nh6 5. Bg2 Bg7
A26 English Opening, Closed System: 3.g3 g6 4.Bg2 Bg7 5.d3 d6
- English Opening: King's English Variation, Closed System, Full Symmetry: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6
- English Opening: King's English Variation, Botvinnik System: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. e4
A27 English Opening, Three Knights System: 3.Nf3 (without: 3...Nf6)
- English Opening: King's English Variation, Three Knights System: 1. c4 e5 2. Nc3 Nc6 3. Nf3
A28 English Opening, Four Knights System: 3...Nf6 (without 4.g3)
- English Opening: King's English Variation, Four Knights Variation: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6
- English Opening: King's English Variation, Four Knights Variation, Korchnoi Line: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3
- English Opening: King's English Variation, Four Knights Variation, Flexible Line: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d3
- English Opening: King's English Variation, Four Knights Variation, Bradley Beach Variation: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 e4
- English Opening: King's English Variation, Four Knights Variation: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 Bb4 6. Bg5 h6 7. Bh4 Bxc3+ 8. bxc3 Ne5
- English Opening: King's English Variation, Four Knights Variation, Quiet Line: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3
- English Opening: King's English Variation, Four Knights Variation, Quiet Line: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 Bxc3
- English Opening: King's English Variation, Four Knights Variation, Quiet Line: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 O-O 6. Nd5 Re8 7. Qf5
- English Opening: Four Knights System, Nimzowitsch Variation: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e4
A29 English Opening, Four Knights, Kingside Fianchetto: 4.g3
- English Opening: King's English Variation, Four Knights Variation, Fianchetto Line: 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6
- English Opening: King's English Variation, Four Knights Variation, Fianchetto Line: 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. d3
- English Opening: King's English Variation, Four Knights Variation, Fianchetto Line: 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. d3 Be7 7. O-O O-O
- English Opening: King's English Variation, Four Knights Variation, Fianchetto Line: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3
- English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Bc5: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Bc5
- English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6
A30 English Opening, Symmetrical Defence: 1...c5 (without: 2.e4, 2.g3 g6 3.Nc3, 2.g3 Nc6 3.Nc3, 2.Nf3 Nc6 3.Nc3, 2.e3 Nf6 4.d4)
- English Opening: Symmetrical Variation: 1. c4 c5
- English Opening: Wing Gambit: 1. c4 c5 2. b4
- English Opening: Symmetrical Variation: 1. c4 c5 2. Nf3
- English Opening: Symmetrical Variation, Napolitano Gambit: 1. c4 c5 2. Nf3 Nf6 3. b4
- English Opening: Symmetrical, Hedgehog, Flexible Formation: 1. c4 e6 2. Nf3 c5 3. Nc3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Rd1 a6 10. b3 Nbd7
- English Opening: Symmetrical Variation, Hedgehog Defense: 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7
A31 English Opening, Symmetrical, Benoni formation: 2.Nf3 Nf6 3.d4 (without: 3...cxd4 4.Nxd4 e6, 3...cxd4 4.Nxd4 a6 5.Nc3 e6, 3...cxd4 4.Nxd4 Nc6 5.Nc3 e6)
- English Opening: Symmetrical Variation, Anti-Benoni Variation: 1. c4 Nf6 2. d4 c5 3. Nf3
A32 English Opening, Symmetrical: 3...cxd4 4.Nxd4 e6
- English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense: 1. c4 e6 2. d4 c5 3. Nf3 cxd4 4. Nxd4 Nf6
A33 English Opening, Symmetrical: 5.Nc3 Nc6
- English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense: 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. d4 cxd4 5. Nxd4 Nc6
- English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation: 1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. d4 Nc6 5. g3 cxd4 6. Nxd4 Qb6
A34 English Opening, Symmetrical: 2.Nc3 (without 2...Nc6, 2...Nf6 3.Nf3 Nc6, 2...Nf6 3.e4 e6, 2...e6 3.Nf3 Nf6, 4.g3 Nc6)
- English Opening: Symmetrical Variation, Normal Variation: 1. c4 c5 2. Nc3
- English Opening: Symmetrical Variation, Three Knights Variation: 1. c4 c5 2. Nc3 Nf6 3. Nf3
- English Opening: Symmetrical Variation, Fianchetto Variation: 1. c4 Nf6 2. Nc3 c5 3. g3
- English Opening: Symmetrical Variation, Rubinstein Variation: 1. c4 Nf6 2. Nc3 c5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc7
A35 English Opening, Symmetrical: 2...Nc6 (without 3.g3, 3.e4, 3.Nf3 Nf6, 4.g3 e6, 3.Nf3 Nf6 4.d4 cxd4 5.Nxd4, 3.Nf3 e5 4.g3 g6 5.Bg2 Bg7)
- English Opening: Symmetrical Variation, Two Knights Variation: 1. c4 c5 2. Nc3 Nc6
- English Opening: Symmetrical Variation, Four Knights Variation: 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6
A36 English Opening, Symmetrical: 3.g3
- English Opening: Symmetrical Variation, Botvinnik System: 1. c4 c5 2. e4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2
- English Opening: Symmetrical Variation, Ultra-Symmetrical Variation: 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6
- English Opening: Symmetrical Variation, Two Knights, Fianchetto Variation: 1. c4 c5 2. Nc3 Nc6 3. g3
- English Opening: Symmetrical Variation, Botvinnik System Reversed, with e3: 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 e5
A37 English Opening, Symmetrical: 3...g6 4.Bg2 Bg7 5.Nf3
- English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation: 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3
- English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3: 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5
A38 English Opening, Symmetrical: 5...Nf6
- English Opening: Symmetrical Variation, Double Fianchetto: 1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. b3
- English Opening: Symmetrical Variation, Full Symmetry Line: 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7
- English Opening: Symmetrical Variation, Duchamp Variation: 1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O c5 6. Nc3 Nc6 7. d3
A39 English, symmetrical, main line with d4: 6.0-0 0-0 7.d4 or 6.d4 cxd4 7.Nxd4 0-0 8.0-0
- English Opening: Symmetrical Variation, Mecking Variation: 1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4
A40–A44
1.d4 without 1...d5, 1...Nf6 or 1...f5: Atypical replies to 1.d4 A40 Queen's Pawn Game
- English Defense: Hartlaub Gambit Declined: 1. c4 e6 2. d4 b6 3. Nc3 Bb7 4. e4 f5 5. d5
- English Defense: Hartlaub Gambit Accepted: 1. c4 e6 2. d4 b6 3. Nc3 Bb7 4. e4 f5 5. exf5 Nf6
- Queen's Pawn Game: 1. d4
- Polish Defense: 1. d4 b5
- Polish Defense: Spassky Gambit Accepted: 1. d4 b5 2. e4 Bb7 3. Bxb5
- English Defense: 1. d4 b6
- English Defense: Eastbourne Gambit: 1. d4 b6 2. c4 Bb7 3. Nc3 e5
- Queen's Pawn Game: Anglo-Slav Opening: 1. d4 c6 2. c4 d6
- Slav Indian: Kudischewitsch Gambit: 1. d4 c6 2. Nf3 Nf6 3. c4 b5
- Englund Gambit: 1. d4 e5
- Englund Gambit Declined: 1. d4 e5 2. d5
- Englund Gambit Declined: Diemer Counterattack: 1. d4 e5 2. d5 Bc5 3. e4 Qh4
- Englund Gambit: Hartlaub-Charlick Gambit: 1. d4 e5 2. dxe5 d6
- Englund Gambit: Soller Gambit: 1. d4 e5 2. dxe5 f6
- Englund Gambit: Felbecker Gambit: 1. d4 e5 2. dxe5 Nc6 3. Nf3 Bc5
- Englund Gambit: Soller Gambit Deferred: 1. d4 e5 2. dxe5 Nc6 3. Nf3 f6
- Englund Gambit: Zilbermints Gambit: 1. d4 e5 2. dxe5 Nc6 3. Nf3 Nge7
- Englund Gambit: Main Line: 1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7
- Englund Gambit: Stockholm Variation: 1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7 4. Qd5
- Englund Gambit: Mosquito Gambit: 1. d4 e5 2. dxe5 Qh4
- Englund Gambit Declined: Reversed French: 1. d4 e5 2. e3
- Englund Gambit Declined: Reversed Alekhine: 1. d4 e5 2. Nf3
- Englund Gambit Declined: Reversed Krebs: 1. d4 e5 2. Nf3 e4
- Englund Gambit Declined: Reversed Mokele Mbembe: 1. d4 e5 2. Nf3 e4 3. Ne5
- Englund Gambit Declined: Reversed Brooklyn: 1. d4 e5 2. Nf3 e4 3. Ng1
- Horwitz Defense: 1. d4 e6
- English Defense: 1. d4 e6 2. c4 b6
- English Defense: Perrin Variation: 1. d4 e6 2. c4 b6 3. e4 Bb7 4. Bd3 Nc6
- English Defense: Poli Gambit: 1. d4 e6 2. c4 b6 3. e4 Bb7 4. f3 f5 5. exf5 Nh6
- Kangaroo Defense: 1. d4 e6 2. c4 Bb4+
- Kangaroo Defense: Keres Defense, Transpositional Variation: 1. d4 e6 2. c4 Bb4+ 3. Nc3
- Benoni Defense: Franco-Sicilian Hybrid: 1. d4 e6 2. c4 c5 3. d5 exd5 4. cxd5 d6 5. Nc3 g6 6. e4 Bg7 7. Nf3 Ne7
- Horwitz Defense: Zilbermints Gambit: 1. d4 e6 2. c4 e5
- Borg Defense: Borg Gambit: 1. d4 g5
- Queen's Pawn Game: Modern Defense: 1. d4 g6
- Pterodactyl Defense: Central, Benoni Pterodactyl: 1. d4 g6 2. c4 Bg7 3. e4 c5 4. d5 Qa5+
- Modern Defense: Beefeater Variation: 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 f5
- Pterodactyl Defense: Fianchetto, Queen Pteranodon: 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 Qa5
- Pterodactyl Defense: Central, Benoni Beefeater Pterodactyl: 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 d6 5. e4 Bxc3+ 6. bxc3 Qa5
- Pterodactyl Defense: Fianchetto, Queen Benoni Pterodactyl: 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Qa5
- Pterodactyl Defense: Queen Pterodactyl, Quiet Line: 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. e3
- Modern Defense: Lizard Defense, Pirc-Diemer Gambit: 1. d4 g6 2. h4 Nf6 3. h5
- Colle System: Siroccopteryx Variation: 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. Nxd4 Qa5+
- Colle System: Pterodactyl Variation: 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+
- Pterodactyl Defense: Fianchetto, Queen Pterodactyl: 1. d4 g6 2. Nf3 Bg7 3. g3 c5 4. Bg2 Qa5+
- Australian Defense: 1. d4 Na6
- Mikenas Defense: 1. d4 Nc6
- Mikenas Defense: Lithuanian Variation: 1. d4 Nc6 2. c4 e5 3. d5 Nce7
- Mikenas Defense: Cannstatter Variation: 1. d4 Nc6 2. c4 e5 3. d5 Nd4
- Mikenas Defense: Pozarek Gambit: 1. d4 Nc6 2. c4 e5 3. dxe5 Nxe5 4. Nc3 Nxc4
- Montevideo Defense: 1. d4 Nc6 2. d5 Nb8
- Zaire Defense: 1. d4 Nc6 2. d5 Nb8 3. e4 Nf6 4. e5 Ng8
A41 Queen's Pawn Game: 1...d6
- Queen's Pawn Game: 1. d4 d6
- Old Indian Defense: 1. d4 d6 2. c4
- Rat Defense: English Rat: 1. d4 d6 2. c4 e5
- Rat Defense: English Rat, Pounds Gambit: 1. d4 d6 2. c4 e5 3. dxe5 Be6
- Rat Defense: English Rat, Lisbon Gambit: 1. d4 d6 2. c4 e5 3. dxe5 Nc6
- Wade Defense: 1. d4 d6 2. Nf3 Bg4
- Zukertort Opening: Wade Defense, Chigorin Plan: 1. d4 d6 2. Nf3 Bg4 3. c4 Nd7 4. Qb3 Rb8
- Robatsch Defense: 1. d4 d6 2. Nf3 g6 3. c4 Bg7 4. e4 Bg4
- Modern Defense: Neo-Modern Defense: 1. d4 g6 2. c4 Bg7 3. e4 e5
- Modern Defense: 1. d4 g6 2. c4 Bg7 3. Nc3 d6
A42 Modern Defence, Averbakh System, also Wade Defence: 2.c4 g6 3.Nc3 Bg7 4.e4
- Modern Defense: Averbakh Variation, Pseudo-Sämisch: 1. d4 g6 2. c4 Bg7 3. e4 d6 4. Be3 Nf6 5. f3
- Pterodactyl Defense: Central, Bogolubovia: 1. d4 g6 2. c4 Bg7 3. e4 d6 4. Nc3 c5 5. Nge2 Qa5
- Modern Defense: Averbakh System: 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4
- Modern Defense: Randspringer Variation: 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 f5
- Modern Defense: Kotov Variation: 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nc6
- Pterodactyl Defense: 1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qa5+ 5. Nc3 d6
A43 Old Benoni Defence: 1...c5
- Benoni Defense: Old Benoni: 1. d4 c5
- Benoni Defense: Zilbermints-Benoni Gambit: 1. d4 c5 2. b4
- Queen's Pawn Game: Liedmann Gambit: 1. d4 c5 2. c4 cxd4 3. e3
- Benoni Defense: Old Benoni: 1. d4 c5 2. d5
- Benoni Defense: Old Benoni: 1. d4 c5 2. d5 d6
- Benoni Defense: Old Benoni, Schmid Variation: 1. d4 c5 2. d5 d6 3. Nc3 g6
- Benoni Defense: Old Benoni, Mujannah Formation: 1. d4 c5 2. d5 f5
- Benoni Defense: Benoni-Staunton Gambit: 1. d4 c5 2. d5 f5 3. e4
- Benoni Defense: Snail Variation: 1. d4 c5 2. d5 Na6
- Benoni Defense: Benoni-Indian Defense: 1. d4 c5 2. d5 Nf6
- Benoni Defense: Woozle: 1. d4 c5 2. d5 Nf6 3. Nc3 Qa5
- Benoni Defense: Benoni Gambit Accepted: 1. d4 c5 2. dxc5
- Benoni Defense: Cormorant Gambit: 1. d4 c5 2. dxc5 b6
- Benoni Defense: Benoni Gambit, Schlenker Defense: 1. d4 c5 2. dxc5 Na6
- Benoni Defense: Zilbermints-Benoni Gambit: 1. d4 c5 2. Nf3 cxd4 3. b4
- Benoni Defense: Zilbermints-Benoni Gambit, Tamarkin Countergambit: 1. d4 c5 2. Nf3 cxd4 3. b4 e5
- Benoni Defense: Benoni-Indian Defense, Kingside Move Order: 1. d4 Nf6 2. Nf3 c5 3. d5
- Indian Defense: Pseudo-Benko: 1. d4 Nf6 2. Nf3 c5 3. d5 b5
- Benoni Defense: Hawk Variation: 1. d4 Nf6 2. Nf3 c5 3. d5 c4
- Benoni Defense: French Benoni: 1. e4 e6 2. d4 c5 3. d5
A44 Old Benoni Defence: 2.d5 e5
- Benoni Defense: Old Benoni: 1. d4 c5 2. d5 e5
- Benoni Defense: Semi-Benoni: 1. d4 c5 2. d5 e5 3. e4 d6
A45–A49
1.d4 Nf6 without 2.c4: Atypical replies to 1...Nf6 A45 Queen's Pawn Game, Trompowsky Attack: 1.d4 Nf6 (without 2.Nf3)
- Indian Defense: 1. d4 Nf6
- Trompowsky Attack: 1. d4 Nf6 2. Bg5
- Trompowsky Attack: Poisoned Pawn Variation: 1. d4 Nf6 2. Bg5 c5 3. d5 Qb6 4. Nc3
- Trompowsky Attack: Classical Defense: 1. d4 Nf6 2. Bg5 e6
- Trompowsky Attack: Classical Defense, Big Center Variation: 1. d4 Nf6 2. Bg5 e6 3. e4
- Trompowsky Attack: Borg Variation: 1. d4 Nf6 2. Bg5 Ne4 3. Bf4 g5
- Trompowsky Attack: Edge Variation: 1. d4 Nf6 2. Bg5 Ne4 3. Bh4
- Trompowsky Attack: Edge Variation, Hergert Gambit: 1. d4 Nf6 2. Bg5 Ne4 3. Bh4 c6 4. Nd2 Qa5 5. c3 Nxd2 6. Qxd2 d5 7. e4
- Trompowsky Attack: Edge Variation, Hergert Gambit: 1. d4 Nf6 2. Bg5 Ne4 3. Bh4 d5 4. f3 Nf6 5. Nc3 Bf5 6. e4
- Trompowsky Attack: Raptor Variation: 1. d4 Nf6 2. Bg5 Ne4 3. h4
- Trompowsky Attack: Raptor Variation, Hergert Gambit: 1. d4 Nf6 2. Bg5 Ne4 3. h4 Nxg5 4. hxg5 e5
- Indian Defense: Pawn Push Variation: 1. d4 Nf6 2. d5
- Indian Defense: Omega Gambit: 1. d4 Nf6 2. e4
- Indian Defense: Omega Gambit, Arafat Gambit: 1. d4 Nf6 2. e4 Nxe4 3. Bd3 Nf6 4. Bg5
- Paleface Attack: 1. d4 Nf6 2. f3
- Indian Defense: Paleface Attack, Blackmar-Diemer Gambit Deferred: 1. d4 Nf6 2. f3 d5 3. e4
- Indian Defense: Gedult Attack, Gedult Attack: 1. d4 Nf6 2. f3 d5 3. g4
- Queen's Pawn Game: Veresov, Richter Attack: 1. d4 Nf6 2. f3 d5 3. Nc3
- Canard Opening: 1. d4 Nf6 2. f4
- Indian Defense: Tartakower Attack: 1. d4 Nf6 2. g3
- Indian Defense: Gibbins-Weidenhagen Gambit: 1. d4 Nf6 2. g4
- Indian Defense: Gibbins-Weidenhagen Gambit, Oshima Defense: 1. d4 Nf6 2. g4 e5
- Indian Defense: Gibbins-Weidenhagen Gambit Accepted: 1. d4 Nf6 2. g4 Nxg4
- Indian Defense: Gibbins-Weidenhagen Gambit, Stummer Gambit: 1. d4 Nf6 2. g4 Nxg4 3. e4 d6 4. Be2 Nf6 5. Nc3
- Indian Defense: Gibbins-Weidenhagen Gambit, Maltese Falcon: 1. d4 Nf6 2. g4 Nxg4 3. f3 Nf6 4. e4
- Indian Defense: Reversed Chigorin Defense: 1. d4 Nf6 2. Nc3 c5
- Queen's Pawn Game: Chigorin Variation: 1. d4 Nf6 2. Nc3 d5
- Amazon Attack: Siberian Attack: 1. d4 Nf6 2. Nc3 d5 3. Qd3
- Indian Defense: Maddigan Gambit: 1. d4 Nf6 2. Nc3 e5
- Indian Defense: Lazard Gambit: 1. d4 Nf6 2. Nd2 e5
A46 Queen's Pawn Game, Torre Attack: 2.Nf3
- Indian Defense: Knights Variation: 1. d4 Nf6 2. Nf3
- Indian Defense: Knights Variation, Alburt-Miles Variation: 1. d4 Nf6 2. Nf3 a6
- Indian Defense: Polish Variation: 1. d4 Nf6 2. Nf3 b5
- Indian Defense: Spielmann-Indian: 1. d4 Nf6 2. Nf3 c5
- Indian Defense: Czech-Indian: 1. d4 Nf6 2. Nf3 c6
- Indian Defense: Wade-Tartakower Defense: 1. d4 Nf6 2. Nf3 d6
- Indian Defense: London System: 1. d4 Nf6 2. Nf3 e6 3. Bf4
- Torre Attack: Classical Defense: 1. d4 Nf6 2. Nf3 e6 3. Bg5
- Torre Attack: Classical Defense, Petrosian Gambit: 1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e3 b6 5. d5
- Torre Attack: Wagner Gambit: 1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e4
- Queen's Pawn Game: Torre Attack, Breyer Variation: 1. d4 Nf6 2. Nf3 e6 3. Bg5 d5 4. e3 c5 5. c3 Qb6
- Torre Attack: Classical Defense, Nimzowitsch Variation: 1. d4 Nf6 2. Nf3 e6 3. Bg5 h6
- Yusupov-Rubinstein System: 1. d4 Nf6 2. Nf3 e6 3. e3
- Queen's Pawn Game: Veresov Attack, Classical Defense: 1. d4 Nf6 2. Nf3 e6 3. Nc3 d5 4. Bg5
- Döry Defense: 1. d4 Nf6 2. Nf3 Ne4
A47 Queen's Indian Defence: 2...b6
- Pseudo Queen's Indian Defense: 1. d4 Nf6 2. Nf3 b6
- Indian Defense: Schnepper Gambit: 1. d4 Nf6 2. Nf3 b6 3. c3 e5
- Marienbad System: 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5
- Marienbad System: Berg Variation: 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 5. c4 cxd4 6. Qxd4
A48 King's Indian, East Indian Defence: 2...g6
- East Indian Defense: 1. d4 Nf6 2. Nf3 g6
- London System: 1. d4 Nf6 2. Nf3 g6 3. Bf4
- Torre Attack: Fianchetto Defense: 1. d4 Nf6 2. Nf3 g6 3. Bg5
- Torre Attack: Fianchetto Defense, Euwe Variation: 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 c5
- Queen's Pawn Game: Torre Attack, Grünfeld Variation, Main Line: 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d5 5. e3 O-O
- Indian Defense: Colle System, King's Indian Variation: 1. d4 Nf6 2. Nf3 g6 3. e3 Bg7 4. Bd3 d6
- Queen's Pawn Game: Barry Attack: 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4
- Queen's Pawn Game: Barry Attack: 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7
- Queen's Pawn Game: Barry Attack, Grünfeld Variation: 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Be2
- Queen's Pawn Game: Barry Attack, Tarzan Attack: 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7 5. Qd2
A49 King's Indian, Fianchetto without c4: 3.g3
- Indian Defense: Przepiorka Variation: 1. d4 Nf6 2. Nf3 g6 3. g3
A50–A55
1.d4 Nf6 2.c4 without 2...e6 or 2...g6: Atypical Indian systems A50 Queen's Pawn Game: 1. d4 Nf6 2.c4 (without 2...d6 2...e5, 2...e6, 2...g6 or 2...c5)
- Indian Defense: Normal Variation: 1. d4 Nf6 2. c4
- Indian Defense: Pyrenees Gambit: 1. d4 Nf6 2. c4 b5
- Queen's Indian Accelerated: 1. d4 Nf6 2. c4 b6
- Slav Indian: 1. d4 Nf6 2. c4 c6
- Indian Defense: Medusa Gambit: 1. d4 Nf6 2. c4 g5
- Mexican Defense: 1. d4 Nf6 2. c4 Nc6
- Mexican Defense: Horsefly Gambit: 1. d4 Nf6 2. c4 Nc6 3. d5 Ne5 4. f4
A51 Budapest Gambit Declined: 2...e5
- Indian Defense: Budapest Defense: 1. d4 Nf6 2. c4 e5
- Indian Defense: Budapest Defense, Fajarowicz Variation: 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4
- Indian Defense: Budapest Defense, Fajarowicz Defense, Bonsdorf Variation: 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. a3 b6
- Indian Defense: Budapest Defense, Fajarowicz-Steiner Variation: 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. Qc2
A52 Budapest Gambit: 3.dxe5 Ng4
- Indian Defense: Budapest Defense: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4
- Indian Defense: Budapest Defense, Rubinstein Variation: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Bf4
- Indian Defense: Budapest Defense, Alekhine Variation: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4
- Indian Defense: Budapest Defense, Alekhine Variation, Tartakower Defense: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 d6
- Indian Defense: Budapest Defense, Alekhine Variation, Abonyi Variation: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 Nxe5 5. f4 Nec6
- Indian Defense: Budapest Defense, Adler Variation: 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3
A53 Old Indian Defence: 2...d6
- Old Indian Defense: 1. d4 Nf6 2. c4 d6
- Old Indian Defense: Aged Gibbon Gambit: 1. d4 Nf6 2. c4 d6 3. g4
- Old Indian Defense: Janowski Variation: 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5
- Old Indian Defense: Janowski Variation, Grinberg Gambit: 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. e4
- Old Indian Defense: Janowski Variation, Main Line: 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. f3
- Old Indian Defense: Janowski Variation, Fianchetto Variation: 1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. g3
- Old Indian Defense: Czech Variation, with Nc3: 1. d4 Nf6 2. c4 d6 3. Nc3 c6
- Old Indian Defense: Czech Variation, with Nf3: 1. d4 Nf6 2. c4 d6 3. Nf3 c6
A54 Old Indian, Ukrainian Variation: 3.Nc3 e5
- Old Indian Defense: Ukrainian Variation: 1. d4 Nf6 2. c4 d6 3. Nc3 e5
- Old Indian Defense: Duz-Khotimirsky Variation: 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. e3 Nbd7 5. Bd3
- Old Indian Defense: Two Knights Variation: 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3
- Old Indian Defense: Tartakower-Indian: 1. d4 Nf6 2. c4 d6 3. Nf3 Bg4
A55 Old Indian, Main line: 4.Nf3 Nbd7 5.e4
- Old Indian Defense: Normal Variation: 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. Nf3
A56–A79
Benoni Defence (and Benko Gambit): 1.d4 Nf6 2.c4 c5
A56 Benoni Defence: 1.d4 Nf6 2.c4 c5
- Benoni Defense: 1. d4 Nf6 2. c4 c5
- Benoni Defense: Hromádka System: 1. d4 Nf6 2. c4 c5 3. d5 d6
- Benoni Defense: Czech Benoni Defense: 1. d4 Nf6 2. c4 c5 3. d5 e5
- Benoni Defense: King's Indian System: 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6
- Vulture Defense: 1. d4 Nf6 2. c4 c5 3. d5 Ne4
- Benoni Defense: Weenink Variation: 1. d4 Nf6 2. c4 c5 3. dxc5 e6
- Grünfeld Defense: Three Knights Variation, Burille Variation, Reversed Tarrasch: 1. d4 Nf6 2. c4 c5 3. e3 g6 4. Nc3 Bg7 5. Nf3 O-O 6. Be2 cxd4 7. exd4 d5 8. O-O Nc6
A57 Benko Gambit: 3.d5 b5
- Benko Gambit: 1. d4 Nf6 2. c4 c5 3. d5 b5
- Benko Gambit Declined: Sosonko Variation: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. a4
- Benko Gambit Declined: Bishop Attack: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Bg5
- Benko Gambit Accepted: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6
- Benko Gambit Accepted: Pawn Return Variation: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. b6
- Benko Gambit Accepted: Modern Variation: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. e3
- Benko Gambit Accepted: Dlugy Variation: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. f3
- Benko Gambit: Zaitsev System: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3
- Benko Gambit: Zaitsev Variation, Nescafe Frappe Attack: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5
- Benko Gambit: Nescafe Frappe Attack: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5 d6 8. Bc4
- Benko Gambit Declined: Hjørring Countergambit: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. e4
- Benko Gambit Declined: Pseudo-Sämisch: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. f3
- Benko Gambit: Mutkin Countergambit: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. g4
- Benko Gambit Declined: Quiet Line: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nd2
- Benko Gambit Declined: Main Line: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nf3
A58 Benko Gambit Accepted: 4.cxb5 a6 5.bxa6
- Benko Gambit Accepted: Fully Accepted Variation: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6
- Benko Gambit: Fianchetto Variation: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8. g3
- Benko Gambit: Nd2 Variation: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8. Nd2
- Benko Gambit Accepted: Central Storming Variation: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. f4
- Benko Gambit Accepted: Fianchetto Variation: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. g3 d6 8. Bg2 Bg7 9. Nf3
A59 Benko Gambit, 7.e4: 5...Bxa6 6.Nc3 d6 7.e4
- Benko Gambit Accepted: Yugoslav: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4
- Benko Gambit: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. e4 Bxf1 8. Kxf1 d6 9. g3
- Benko Gambit Accepted: Yugoslav: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. e4 Bxf1 8. Kxf1 d6 9. Nge2
- Benko Gambit Accepted: King Walk Variation: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. Nf3 d6 8. e4 Bxf1 9. Kxf1 Bg7 10. g3 O-O 11. Kg2
A60 Benoni Defence: 3.d5 e6
- Benoni Defense: Modern Variation: 1. d4 Nf6 2. c4 c5 3. d5 e6
- Benoni Defense: Modern Variation, Snake Variation: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 Bd6
A61 Benoni Defence: 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6
- Benoni Defense: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6
- Benoni Defense: Uhlmann Variation: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg5
- Benoni Defense: Fianchetto Variation: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. g3
- Benoni Defense: Knight's Tour Variation: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Nd2
A62 Benoni, Fianchetto Variation without 9...Nbd7: 7.g3 Bg7 8.Bg2 0-0
- Benoni Defense: Fianchetto Variation: 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O
A63 Benoni, Fianchetto Variation, 9...Nbd7: 9.Nbd7
- Benoni Defense: Fianchetto Variation, Hastings Defense: 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O Nbd7
A64 Benoni, Fianchetto Variation, 11...Re8: 9...Nbd7: 10.Nd2 a6 11.a4 Re8
- Benoni Defense: Fianchetto Variation, Hastings Defense, Main Line: 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O a6 10. a4 Nbd7 11. Nd2 Re8
A65 Benoni, 6.e4: 4.Nc3 exd5 5.cxd5 d6 6.e4
- Benoni Defense: King's Pawn Line: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4
A66 Benoni, Pawn Storm Variation: 6...g6 7.f4
- Benoni Defense: Pawn Storm Variation: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4
- Benoni Defense: Mikenas Variation: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. e5
A67 Benoni, Taimanov Variation: 7...Bg7 8.Bb5+
- Benoni Defense: Taimanov Variation: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5+
A68 Benoni, Four Pawns Attack: 7...Bg7 8.Nf3 0-0
- Benoni Defense: Four Pawns Attack: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O
A69 Benoni, Four Pawns Attack, Main line: 9.Be2 Re8
- Benoni Defense: Four Pawns Attack, Main Line: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. cxd5 Re8
A70 Benoni, Classical with e4 and Nf3: 6...g6 7.Nf3
- Benoni Defense: Classical Variation: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4
- Benoni Defense: Classical Variation, Traditional Variation: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2
- Benoni Defense: Classical Variation, New York Variation: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. h3
A71 Benoni, Classical, 8.Bg5: 7... Bg7 8.Bg5
- Benoni Defense: Classical Variation, Averbakh-Grivas Attack: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Bg5
A72 Benoni, Classical without 9.0-0: 7...Bg7 8.Be2 0-0
- Benoni Defense: Classical Variation: 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
A73 Benoni, Classical, 9.0-0: 9.0-0
- Benoni Defense: Classical Variation, Main Line: 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
A74 Benoni, Classical, 9...a6, 10.a4: 9...a6 10.a4
- Benoni Defense: Classical Variation, Full Line: 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
A75 Benoni, Classical with 9...a6 and 10...Bg4: 9...a6 10.a4 Bg4
- Benoni Defense: Classical Variation, Argentine Counterattack: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2 O-O 9. O-O a6 10. a4 Bg4
A76 Benoni, Classical, 9...Re8: 9...Re8
- Benoni Defense: Classical Variation, Czerniak Defense: 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
A77 Benoni, Classical, 9...Re8, 10.Nd2: 10.Nd2
- Benoni Defense: Classical Variation, Czerniak Defense, Tal Line: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2
A78 Benoni, Classical with 9...Re8 and 10...Na6: 10...Na6
- Benoni Defense: Classical Variation, Czerniak Defense: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Na6
A79 Benoni, Classical, 11.f3: 11.f3
- Benoni Defense: Classical Variation, Czerniak Defense: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Na6 11. f3
A80–A99
Dutch Defence: 1.d4 f5 A80 Dutch Defence: 1.d4 f5
- Dutch Defense: 1. d4 f5
- Dutch Defense: Senechaud Gambit: 1. d4 f5 2. Bf4 e6 3. g4
- Dutch Defense: Hopton Attack: 1. d4 f5 2. Bg5
- Dutch Defense: Krejcik Gambit: 1. d4 f5 2. g4
- Dutch Defense: Hevendehl Gambit: 1. d4 f5 2. g4 e5
- Dutch Defense: Krejcik Gambit, Tate Gambit: 1. d4 f5 2. g4 fxg4 3. e4 d5 4. Nc3
- Dutch Defense: Korchnoi Attack: 1. d4 f5 2. h3
- Dutch Defense: Janzen-Korchnoi Gambit: 1. d4 f5 2. h3 Nf6 3. g4
- Dutch Defense: Raphael Variation: 1. d4 f5 2. Nc3
- Queen's Pawn Game: Veresov Attack, Dutch System: 1. d4 f5 2. Nc3 d5
- Dutch Defense: Kingfisher Gambit: 1. d4 f5 2. Nc3 d5 3. e4
- Dutch Defense: Spielmann Gambit: 1. d4 f5 2. Nc3 Nf6 3. g4
- Dutch Defense: Omega-Isis Gambit: 1. d4 f5 2. Nf3 e5
- Dutch Defense: Alapin Variation: 1. d4 f5 2. Qd3
- Dutch Defense: Manhattan Gambit, Anti-Stonewall: 1. d4 f5 2. Qd3 d5 3. g4
- Dutch Defense: Manhattan Gambit, Anti-Modern: 1. d4 f5 2. Qd3 d6 3. g4
- Dutch Defense: Manhattan Gambit, Anti-Classical Line: 1. d4 f5 2. Qd3 e6 3. g4
- Dutch Defense: Manhattan Gambit, Anti-Leningrad: 1. d4 f5 2. Qd3 g6 3. g4
A81 Dutch Defence: 2.g3
- Dutch Defense: Fianchetto Attack: 1. d4 f5 2. g3
- Dutch Defense: Leningrad, Basman System: 1. d4 f5 2. g3 c6 3. Bg2 g6 4. Nf3 Bg7 5. O-O Nh6
- Dutch Defense: Leningrad Variation, Carlsbad Variation: 1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nh3
- Dutch Defense: Blackburne Variation: 1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. Nh3
- Dutch Defense: Semi-Leningrad Variation: 1. d4 f5 2. g3 Nf6 3. Bg2 g6
A82 Dutch, Staunton Gambit 2.e4
- Dutch Defense: Staunton Gambit: 1. d4 f5 2. e4
- Dutch Defense: Staunton Gambit Accepted: 1. d4 f5 2. e4 fxe4
- Dutch Defense: Blackmar's Second Gambit: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. f3
- Dutch Defense: Staunton Gambit, Tartakower Variation: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4
- Dutch Defense: Staunton Gambit, American Attack: 1. d4 f5 2. e4 fxe4 3. Nd2
- Rat Defense: Balogh Defense: 1. e4 d6 2. d4 f5
A83 Dutch, Staunton Gambit, Staunton's line 2.e4 fxe4 3.Nc3 Nf6 4.Bg5
- Dutch Defense: Staunton Gambit: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5
- Dutch Defense: Staunton Gambit, Nimzowitsch Variation: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 b6
- Dutch Defense: Staunton Gambit, Chigorin Variation: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 c6
- Dutch Defense: Staunton Gambit, Lasker Variation: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. f3
- Dutch Defense: Staunton Gambit, Alekhine Variation: 1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. h4
A84 Dutch Defence 2.c4: 2.c4
- Dutch Defense: 1. d4 f5 2. c4
- Dutch Defense: Classical Variation: 1. d4 f5 2. c4 e6
- Dutch Defense: Bellon Gambit: 1. d4 f5 2. c4 e6 3. e4
- Dutch Defense: Rubinstein Variation: 1. d4 f5 2. c4 e6 3. Nc3
- Dutch Defense: Bladel Variation: 1. d4 f5 2. c4 g6 3. Nc3 Nh6
- Dutch Defense: Normal Variation: 1. d4 f5 2. c4 Nf6
- Dutch Defense: Krause Variation: 1. d4 f5 2. c4 Nf6 3. Nc3 d6 4. Nf3 Nc6
A85 Dutch with 2.c4 Nf6 3.Nc3: 2... Nf6 3.Nc3
- Dutch Defense: Queen's Knight Variation: 1. d4 f5 2. c4 Nf6 3. Nc3
A86 Dutch with 2.c4 Nf6 3.g3: 2... Nf6 3.g3
- Dutch Defense: Fianchetto Variation: 1. d4 f5 2. c4 Nf6 3. g3
- Dutch Defense: Hort-Antoshin System: 1. d4 f5 2. c4 Nf6 3. g3 d6 4. Bg2 c6 5. Nc3 Qc7
- Dutch Defense: Leningrad Variation: 1. d4 f5 2. c4 Nf6 3. g3 g6
A87 Dutch, Leningrad, Main Variation: 3...g6 4.Bg2 Bg7 5.Nf3
- Dutch Defense: Leningrad Variation: 1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3
A88 Dutch, Leningrad, Main Variation with 5...0-0 6.0-0 d6 7.Nc3 c6: 5...0-0 6.0-0 d6 7.Nc3 c6
- Dutch Defense: Leningrad Variation, Warsaw Variation: 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 c6
A89 Dutch, Leningrad, Main Variation with 5...0-0 6.0-0 d6 7.Nc3 Nc6: 5...0-0 6.0-0 d6 7.Nc3 Nc6
- Dutch Defense: Leningrad Variation, Matulovic Variation: 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 Nc6
A90 Dutch Defence 2.c4 Nf6 3.g3 e6 4.Bg2: 3...e6 4.Bg2
- Dutch Defense: Stonewall Variation, Modern Variation: 1. d4 f5 2. c4 e6 3. Nf3 Nf6 4. g3 c6 5. Bg2 d5 6. O-O Bd6
- Dutch Defense: Classical Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2
- Dutch Defense: Nimzo-Dutch Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Bb4+
- Dutch Defense: Nimzo-Dutch Variation, Alekhine Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Bb4+ 5. Bd2 Be7
- Dutch Defense: Classical Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 d5 5. Nf3
A91 Dutch Defence 2.c4 Nf6 3.g3 e6 4.Bg2 Be7: 4...Be7
- Dutch Defense: Classical Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7
- Dutch Defense: Classical Variation, Blackburne Attack: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nh3
A92 Dutch Defence 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0: 5.Nf3 0-0
- Dutch Defense: Classical Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O
- Dutch Defense: Stonewall Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5
- Dutch Defense: Stonewall Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3
- Dutch Defense: Alekhine Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O Ne4
A93 Dutch, Stonewall, Botvinnik Variation 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d5 7. b3: 6.0-0 d5 7. b3
- Dutch Defense: Stonewall Variation, Botvinnik Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3
A94 Dutch, Stonewall with 6.0-0 d5.7.b3 c6 8.Ba3: 7... c6 8.Ba3
- Dutch Defense: Stonewall Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3 c6 8. Ba3
A95 Dutch, Stonewall with 6.0-0 d5.7.Nc3 c6: 6.0-0 d5 7.Nc3 c6
- Dutch Defense: Stonewall Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6
- Dutch Defense: Stonewall Variation, Chekhover Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6 8. Qc2 Qe8 9. Bg5
A96 Dutch, Classical Variation 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d6: 6.0-0 d6
- Dutch Defense: Classical Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6
- Dutch Defense: Classical Variation, Buenos Aires Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 a5
- Dutch Defense: Classical Variation, Huisl Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Ne4
A97 Dutch, Ilyin–Genevsky Variation 7.Nc3 Qe8: 7.Nc3 Qe8
- Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8
- Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Winter Variation: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. Re1
A98 Dutch, Ilyin–Genevsky Variation with 7.Nc3 Qe8 8.Qc2: 8.Qc2
- Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Alatortsev-Lisitsyn Line: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. Qc2
A99 Dutch, Ilyin–Genevsky Variation with 7.Nc3 Qe8 8.b3: 8.b3
- Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Modern Main Line: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. b3