Openings
1,811 openings in the database
Browse the full opening catalog. Search by name or ECO code (e.g. “Najdorf” or “B90”), or filter by volume A–E. Click any opening to see its position on the board and the grandmaster videos played in that line.
Why do so many openings share the same code? (how ECO works)
Every chess opening is filed under one of just 500 ECO codes(A00–E99), grouped into five volumes:
- A — Flank openings (English 1.c4, 1.Nf3, irregular lines)
- B — Semi-open games except the French (Sicilian, Caro-Kann…)
- C — Open games 1.e4 e5 and the French 1.e4 e6
- D — Closed & semi-closed 1.d4 d5 (Queen’s Gambit, Grünfeld…)
- E — Indian defences (Nimzo-Indian, King’s Indian…)
A single code is a family: e.g. C50 covers the whole Italian Game / Giuoco Piano complex, so the Giuoco Piano, Giuoco Pianissimo, Hungarian Defense and Two Knights all live under C50. That’s why one code maps to many named variations — the code is the family, the name is the specific line. ChessEyes shows you both.
B15Caro-Kann Defense: Tartakower Variation10 plyB15Caro-Kann Defense: von Hennig Gambit7 plyB16Caro-Kann Defense: Bronstein-Larsen Variation10 plyB16Caro-Kann Defense: Finnish Variation8 plyB17Caro-Kann Defense: Karpov Variation8 plyB18Caro-Kann Defense: Classical Variation8 plyB18Caro-Kann Defense: Martian Gambit13 plyB19Caro-Kann Defense: Classical Variation14 plyB20Sicilian Defense2 plyB20Sicilian Defense: Amazon Attack3 plyB20Sicilian Defense: Big Clamp Formation7 plyB20Sicilian Defense: Bowdler Attack3 plyB20Sicilian Defense: Brick Variation3 plyB20Sicilian Defense: Czerniak Attack3 plyB20Sicilian Defense: Euwe Attack5 plyB20Sicilian Defense: Gloria Variation8 plyB20Sicilian Defense: Grob Variation3 plyB20Sicilian Defense: Keres Variation3 plyB20Sicilian Defense: King David's Opening3 plyB20Sicilian Defense: Kronberger Variation3 plyB20Sicilian Defense: Lasker-Dunne Attack3 plyB20Sicilian Defense: Mengarini Variation3 plyB20Sicilian Defense: Myers Attack3 plyB20Sicilian Defense: Staunton-Cochrane Variation3 plyB20Sicilian Defense: Wing Gambit3 plyB21Bird Opening: Dutch Variation6 plyB21Sicilian Defense: Coles Sicilian Gambit9 plyB21Sicilian Defense: Halasz Gambit5 plyB21Sicilian Defense: McDonnell Attack3 plyB21Sicilian Defense: Morphy Gambit5 plyB21Sicilian Defense: Smith-Morra Gambit3 plyB21Sicilian Defense: Smith-Morra Gambit Accepted6 plyB21Sicilian Defense: Smith-Morra Gambit Declined6 plyB22Sicilian Defense: Alapin Variation3 plyB22Sicilian Defense: Delayed Alapin Variation10 plyB22Sicilian Defense: Heidenfeld Variation9 plyB23Sicilian Defense: Closed3 plyB23Sicilian Defense: Grand Prix Attack5 plyB24Sicilian Defense: Closed5 plyB25Sicilian Defense: Closed10 plyB26Sicilian Defense: Closed11 plyB27Modern Defense: Pterodactyl Variation8 plyB27Pterodactyl Defense: Sicilian9 plyB27Pterodactyl Defense: Western8 plyB27Sicilian Defense3 plyB27Sicilian Defense: Acton Extension6 plyB27Sicilian Defense: Brussels Gambit4 plyB27Sicilian Defense: Bücker Variation4 plyB27Sicilian Defense: Double-Dutch Gambit6 plyB27Sicilian Defense: Frederico Variation6 plyB27Sicilian Defense: Hyperaccelerated Dragon4 plyB27Sicilian Defense: Hyperaccelerated Pterodactyl6 plyB27Sicilian Defense: Jalalabad Variation4 plyB27Sicilian Defense: Katalimov Variation4 plyB27Sicilian Defense: Mongoose Variation4 plyB27Sicilian Defense: Polish Gambit4 plyB27Sicilian Defense: Quinteros Variation4 plyB28Sicilian Defense: O'Kelly Variation4 plyB29Sicilian Defense: Nimzowitsch Variation4 plyB30Sicilian Defense: Closed6 ply