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Browse through ECO volumes A to E and discover strategic ideas, tactical plans, and model games for thousands of openings.

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Amar Opening
A00
1. Nh3
Amar Opening: Paris Gambit
A00
1. Nh3 d5 2. g3 e5 3. f4
Amar Opening: Paris Gambit, Gent Gambit
A00
1. Nh3 d5 2. g3 e5 3. f4 Bxh3 4. Bxh3 exf4 5. O-O fxg3 6. hxg3
Amsterdam Attack
A00
1. e3 e5 2. c4 d6 3. Nc3 Nc6 4. b3 Nf6
Anderssen's Opening
A00
1. a3
Anderssen's Opening: Polish Gambit
A00
1. a3 a5 2. b4
Barnes Opening
A00
1. f3
Barnes Opening: Fool's Mate
A00
1. f3 e5 2. g4 Qh4#
Barnes Opening: Gedult Gambit
A00
1. f3 d5 2. e4 g6 3. d4 dxe4 4. c3
Barnes Opening: Gedult Gambit
A00
1. f3 f5 2. e4 fxe4 3. Nc3
Barnes Opening: Hammerschlag
A00
1. f3 e5 2. Kf2
Clemenz Opening
A00
1. h3
Clemenz Opening: Spike Lee Gambit
A00
1. h3 h5 2. g4
Creepy Crawly Formation: Classical Defense
A00
1. h3 d5 2. a3 e5
Formation: Hippopotamus Attack
A00
1. a3 e5 2. b3 d5 3. c3 Nf6 4. d3 Nc6 5. e3 Bd6 6. f3 O-O 7. g3
Formation: Shy Attack
A00
1. a3 e5 2. g3 d5 3. Bg2 Nf6 4. d3 Nc6 5. Nd2 Bd6 6. e3 O-O 7. h3
Global Opening
A00
1. h3 e5 2. a3
Grob Opening
A00
1. g4
Grob Opening: Alessi Gambit
A00
1. g4 f5
Grob Opening: Double Grob
A00
1. g4 g5
Grob Opening: Double Grob, Coca-Cola Gambit
A00
1. g4 g5 2. f4
Grob Opening: Grob Gambit
A00
1. g4 d5 2. Bg2
Grob Opening: Grob Gambit Declined
A00
1. g4 d5 2. Bg2 c6
Grob Opening: Grob Gambit, Basman Gambit
A00
1. g4 d5 2. Bg2 h5 3. gxh5
Grob Opening: Grob Gambit, Fritz Gambit
A00
1. g4 d5 2. Bg2 Bxg4 3. c4
Grob Opening: Grob Gambit, Fritz Gambit, Romford Countergambit
A00
1. g4 d5 2. Bg2 Bxg4 3. c4 d4 4. Bxb7 Nd7 5. Bxa8 Qxa8
Grob Opening: Grob Gambit, Keres Gambit
A00
1. g4 d5 2. Bg2 e5 3. d4 exd4 4. c3
Grob Opening: Grob Gambit, Richter-Grob Gambit
A00
1. g4 d5 2. Bg2 c6 3. c4 dxc4 4. b3
Grob Opening: Keene Defense
A00
1. g4 d5 2. h3 e5 3. Bg2 c6
Grob Opening: Keene Defense, Main Line
A00
1. g4 d5 2. h3 e5 3. Bg2 c6 4. d4 e4 5. c4 Bd6 6. Nc3 Ne7
Grob Opening: London Defense
A00
1. g4 e5 2. h3 Nc6
Grob Opening: Romford Countergambit
A00
1. g4 d5 2. Bg2 Bxg4 3. c4 d4
Grob Opening: Spike Attack
A00
1. g4 d5 2. Bg2 c6 3. g5
Grob Opening: Spike, Hurst Attack
A00
1. g4 e5 2. Bg2 d5 3. c4
Grob Opening: Zilbermints Gambit
A00
1. g4 d5 2. e4 dxe4 3. Nc3
Grob Opening: Zilbermints Gambit, Schiller Defense
A00
1. g4 d5 2. e4 dxe4 3. Nc3 h5
Grob Opening: Zilbermints Gambit, Zilbermints-Hartlaub Gambit
A00
1. g4 d5 2. e4 dxe4 3. Nc3 e5 4. d3
Hungarian Opening
A00
1. g3
Hungarian Opening: Asten Gambit
A00
1. g3 Nc6 2. Nc3 d5 3. d4 e5 4. dxe5 d4 5. Ne4 f5
Hungarian Opening: Burk Gambit
A00
1. g3 e5 2. a3 d5 3. Nf3 e4 4. Nh4 Be7 5. d3
Hungarian Opening: Bücker Gambit
A00
1. g3 d5 2. Bg2 e5 3. b4
Hungarian Opening: Catalan Formation
A00
1. g3 d5 2. Bg2 e6
Hungarian Opening: Dutch Defense
A00
1. g3 f5
Hungarian Opening: Indian Defense
A00
1. g3 Nf6
Hungarian Opening: Myers Defense
A00
1. g3 g5
Hungarian Opening: Pachman Gambit
A00
1. g3 f5 2. e4 fxe4 3. Qh5+ g6
Hungarian Opening: Paris Gambit
A00
1. g3 e5 2. Nh3 d5 3. f4 Bxh3 4. Bxh3 exf4 5. O-O
Hungarian Opening: Reversed Alekhine
A00
1. g3 e5 2. Nf3
Hungarian Opening: Reversed Brooklyn Defense, Brooklyn Benko Gambit
A00
1. g3 e5 2. Nf3 e4 3. Ng1 Nf6 4. b4
Hungarian Opening: Reversed Modern Defense
A00
1. g3 d5 2. Bg2 c5
Hungarian Opening: Reversed Norwegian Defense
A00
1. g3 e5 2. Nf3 e4 3. Nh4
Hungarian Opening: Sicilian Invitation
A00
1. g3 c5
Hungarian Opening: Slav Formation
A00
1. g3 d5 2. Bg2 c6
Hungarian Opening: Symmetrical Variation
A00
1. g3 g6
Hungarian Opening: Van Kuijk Gambit
A00
1. g3 h5 2. Nf3 h4
Hungarian Opening: Winterberg Gambit
A00
1. g3 d5 2. Bg2 e5 3. c4 dxc4 4. b3
Kádas Opening
A00
1. h4
Kádas Opening: Beginner's Trap
A00
1. h4 d5 2. Rh3
Kádas Opening: Koola-Koola Variation
A00
1. h4 a5
Kádas Opening: Kádas Gambit
A00
1. h4 c5 2. b4
Kádas Opening: Kádas Gambit
A00
1. h4 d5 2. d4 c5 3. Nf3 cxd4 4. c3
Kádas Opening: Kádas Gambit
A00
1. h4 e5 2. d4 exd4 3. c3
Kádas Opening: Myers Variation
A00
1. h4 d5 2. d4 c5 3. e4
Kádas Opening: Schneider Gambit
A00
1. h4 g5
Kádas Opening: Steinbok Gambit
A00
1. h4 f5 2. e4 fxe4 3. d3
Lasker Simul Special
A00
1. g3 h5
Mieses Opening
A00
1. d3
Mieses Opening: Myers Spike Attack
A00
1. d3 g6 2. g4
Mieses Opening: Reversed Rat
A00
1. d3 e5
Mieses Opening: Venezolana Variation
A00
1. d3 c5 2. Nc3 Nc6 3. g3
Polish Opening
A00
1. b4
Polish Opening, with d5
A00
1. b4 d5
Polish Opening, with d5
A00
1. b4 d5 2. Bb2 Nf6 3. Nf3
Polish Opening: Baltic Defense
A00
1. b4 d5 2. Bb2 Bf5
Polish Opening: Birmingham Gambit
A00
1. b4 c5
Polish Opening: Bugayev Advance Variation
A00
1. b4 e5 2. Bb2 f6 3. b5
Polish Opening: Bugayev Attack
A00
1. b4 e5 2. a3
Polish Opening: Czech Defense
A00
1. b4 e5 2. Bb2 d6
Polish Opening: Dutch Defense
A00
1. b4 f5
Polish Opening: German Defense
A00
1. b4 d5 2. Bb2 Qd6
Polish Opening: Grigorian Variation
A00
1. b4 Nc6
Polish Opening: Karniewski Variation
A00
1. b4 Nh6
Polish Opening: King's Indian Variation
A00
1. b4 Nf6 2. Bb2 g6
Polish Opening: King's Indian Variation, Schiffler Attack
A00
1. b4 Nf6 2. Bb2 g6 3. e4
Polish Opening: King's Indian Variation, Sokolsky Attack
A00
1. b4 Nf6 2. Bb2 g6 3. c4 Bg7 4. e3 d6 5. Nf3 O-O 6. d4
Polish Opening: Myers Variation
A00
1. b4 d5 2. Bb2 c6 3. a4
Polish Opening: Outflank Variation
A00
1. b4 c6
Polish Opening: Outflank Variation, Schuehler Gambit
A00
1. b4 c6 2. Bb2 a5 3. b5
Polish Opening: Queen's Indian Variation
A00
1. b4 e6 2. Bb2 Nf6 3. b5 b6
Polish Opening: Queenside Defense
A00
1. b4 e6 2. Bb2 Nf6 3. b5 a6
Polish Opening: Rooks Swap Line
A00
1. b4 e6 2. Bb2 Nf6 3. b5 a6 4. a4 axb5 5. axb5 Rxa1 6. Bxa1
Polish Opening: Schiffler-Sokolsky Variation
A00
1. b4 e6 2. Bb2 Nf6 3. b5 d5 4. e3
Polish Opening: Schuehler Gambit
A00
1. b4 c6 2. Bb2 a5 3. b5 cxb5 4. e4
Polish Opening: Symmetrical Variation
A00
1. b4 b5
Polish Opening: Tartakower Gambit
A00
1. b4 e5 2. Bb2 f6 3. e4
Polish Opening: Wolferts Gambit
A00
1. b4 e5 2. Bb2 c5
Saragossa Opening
A00
1. c3
Sodium Attack
A00
1. Na3
Sodium Attack: Celadon Variation
A00
1. Na3 e5 2. d3 Bxa3 3. bxa3 d5 4. e3 c5 5. Rb1
Sodium Attack: Chenoboskion Variation
A00
1. Na3 g6 2. g4