Sicilian Defense
1.e4 c5
ECO B20
The Sicilian Defense is a chess opening reached after 1.e4 c5, catalogued under code B20 in the Encyclopaedia of Chess Openings (ECO).
The defining move c5 is chosen by Black on move 1.
91 named continuations branch from this position, including the Amazon Attack and the Big Clamp Formation.
Named variations
- Sicilian Defense: Amazon Attack — ECO B20
- Sicilian Defense: Big Clamp Formation — ECO B20
- Sicilian Defense: Bowdler Attack — ECO B20
- Sicilian Defense: Brick Variation — ECO B20
- Sicilian Defense: Czerniak Attack — ECO B20
- Sicilian Defense: Euwe Attack, Prins Gambit — ECO B20
- Sicilian Defense: Gloria Variation — ECO B20
- Sicilian Defense: Grob Variation — ECO B20
- Sicilian Defense: Keres Variation — ECO B20
- Sicilian Defense: King David's Opening — ECO B20
- Sicilian Defense: Kronberger Variation — ECO B20
- Sicilian Defense: Lasker-Dunne Attack — ECO B20
- Sicilian Defense: Mengarini Variation — ECO B20
- Sicilian Defense: Myers Attack, with a4 — ECO B20
- Sicilian Defense: Myers Attack, with h4 — ECO B20
- Sicilian Defense: Staunton-Cochrane Variation — ECO B20
- Sicilian Defense: Wing Gambit — ECO B20
- Sicilian Defense: Coles Sicilian Gambit — ECO B21
- Sicilian Defense: Halasz Gambit — ECO B21
- Sicilian Defense: McDonnell Attack — ECO B21
- Sicilian Defense: Morphy Gambit — ECO B21
- Sicilian Defense: Smith-Morra Gambit — ECO B21
- Sicilian Defense: Smith-Morra Gambit Accepted — ECO B21
- Sicilian Defense: Smith-Morra Gambit Declined, Alapin Formation — ECO B21
- Sicilian Defense: Smith-Morra Gambit Declined, Center Formation — ECO B21
- Sicilian Defense: Smith-Morra Gambit Declined, Dubois Variation — ECO B21
- Sicilian Defense: Smith-Morra Gambit Declined, Push Variation — ECO B21
- Sicilian Defense: Smith-Morra Gambit Declined, Scandinavian Formation — ECO B21
- Sicilian Defense: Smith-Morra Gambit Declined, Wing Formation — ECO B21
- Sicilian Defense: Alapin Variation — ECO B22
- Sicilian Defense: Delayed Alapin Variation — ECO B22
- Sicilian Defense: Heidenfeld Variation — ECO B22
- Sicilian Defense: Closed — ECO B23
- Sicilian Defense: Grand Prix Attack — ECO B23
- Sicilian Defense: Acton Extension — ECO B27
- Sicilian Defense: Brussels Gambit — ECO B27
- Sicilian Defense: Bücker Variation — ECO B27
- Sicilian Defense: Double-Dutch Gambit — ECO B27
- Sicilian Defense: Frederico Variation — ECO B27
- Sicilian Defense: Hyperaccelerated Dragon — ECO B27
- Sicilian Defense: Hyperaccelerated Pterodactyl — ECO B27
- Sicilian Defense: Jalalabad Variation — ECO B27
- Sicilian Defense: Katalimov Variation — ECO B27
- Sicilian Defense: Mongoose Variation — ECO B27
- Sicilian Defense: Polish Gambit — ECO B27
- Sicilian Defense: Quinteros Variation — ECO B27
- Sicilian Defense: O'Kelly Variation — ECO B28
- Sicilian Defense: Nimzowitsch Variation — ECO B29
- Sicilian Defense: Nyezhmetdinov-Rossolimo Attack — ECO B30
- Sicilian Defense: Old Sicilian — ECO B30
- Sicilian Defense: Portsmouth Gambit — ECO B30
- Sicilian Defense: Accelerated Dragon — ECO B32
- Sicilian Defense: Flohr Variation — ECO B32
- Sicilian Defense: Franco-Sicilian Variation — ECO B32
- Sicilian Defense: Godiva Variation — ECO B32
- Sicilian Defense: Kalashnikov Variation — ECO B32
- Sicilian Defense: Löwenthal Variation — ECO B32
- Sicilian Defense: Nimzo-American Variation — ECO B32
- Sicilian Defense: Open — ECO B32
- Sicilian Defense: Lasker-Pelikan Variation — ECO B33
- Sicilian Defense: Drazic Variation — ECO B40
- Sicilian Defense: French Variation — ECO B40
- Sicilian Defense: Gaw-Paw Variation — ECO B40
- Sicilian Defense: Kramnik Variation — ECO B40
- Sicilian Defense: Kveinis Variation — ECO B40
- Sicilian Defense: Marshall Counterattack — ECO B40
- Sicilian Defense: Paulsen-Basman Defense — ECO B40
- Sicilian Defense: Pin Variation — ECO B40
- Sicilian Defense: Smith-Morra Gambit Deferred — ECO B40
- Sicilian Defense: Wing Gambit Deferred — ECO B40
- Sicilian Defense: Kan Variation — ECO B41
- Sicilian Defense: Taimanov Variation — ECO B44
- Sicilian Defense: Four Knights Variation — ECO B45
- Sicilian Defense: Kopec System — ECO B50
- Sicilian Defense: Kotov Gambit — ECO B50
- Sicilian Defense: Modern Variations — ECO B50
- Sicilian Defense: Moscow Variation — ECO B51
- Sicilian Defense: Chekhover Variation — ECO B53
- Sicilian Defense: Prins Variation — ECO B54
- Sicilian Defense: Classical Variation — ECO B56
- Sicilian Defense: Kupreichik Variation — ECO B56
- Sicilian Defense: Spielmann Variation — ECO B56
- Sicilian Defense: Venice Attack — ECO B56
- Sicilian Defense: Magnus Smith Trap — ECO B57
- Sicilian Defense: Boleslavsky Variation — ECO B58
- Sicilian Defense: Richter-Rauzer Variation — ECO B60
- Sicilian Defense: Dragon Variation — ECO B70
- Sicilian Defense: Scheveningen Variation — ECO B80
- Sicilian Defense: Sozin Attack — ECO B86
- Sicilian Defense: Velimirovic Attack — ECO B89
- Sicilian Defense: Najdorf Variation — ECO B90
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