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.
B30Sicilian Defense: Nyezhmetdinov-Rossolimo Attack5 plyB30Sicilian Defense: Old Sicilian4 plyB30Sicilian Defense: Portsmouth Gambit5 plyB31Sicilian Defense: Nyezhmetdinov-Rossolimo Attack6 plyB32Sicilian Defense: Accelerated Dragon8 plyB32Sicilian Defense: Flohr Variation8 plyB32Sicilian Defense: Franco-Sicilian Variation6 plyB32Sicilian Defense: Godiva Variation8 plyB32Sicilian Defense: Kalashnikov Variation10 plyB32Sicilian Defense: Löwenthal Variation8 plyB32Sicilian Defense: Nimzo-American Variation8 plyB32Sicilian Defense: O'Kelly Variation10 plyB32Sicilian Defense: Open5 plyB33Sicilian Defense: Lasker-Pelikan Variation10 plyB33Sicilian Defense: Open8 plyB34Sicilian Defense: Accelerated Dragon9 plyB35Sicilian Defense: Accelerated Dragon13 plyB35Sicilian Defense: Dragon Variation14 plyB36Sicilian Defense: Accelerated Dragon9 plyB37Sicilian Defense: Accelerated Dragon10 plyB38Sicilian Defense: Accelerated Dragon11 plyB39Sicilian Defense: Accelerated Dragon14 plyB40Sicilian Defense: Alapin Variation10 plyB40Sicilian Defense: Delayed Alapin Variation5 plyB40Sicilian Defense: Drazic Variation6 plyB40Sicilian Defense: French Variation4 plyB40Sicilian Defense: Gaw-Paw Variation10 plyB40Sicilian Defense: Kan Variation11 plyB40Sicilian Defense: Kramnik Variation5 plyB40Sicilian Defense: Kveinis Variation8 plyB40Sicilian Defense: Marshall Counterattack6 plyB40Sicilian Defense: Paulsen-Basman Defense8 plyB40Sicilian Defense: Pin Variation10 plyB40Sicilian Defense: Smith-Morra Gambit Deferred7 plyB40Sicilian Defense: Wing Gambit Deferred5 plyB41Sicilian Defense: Kan Variation8 plyB42Sicilian Defense: Kan Variation9 plyB43Sicilian Defense: Kan Variation9 plyB44Sicilian Defense: Taimanov Variation8 plyB45Sicilian Defense: Four Knights Variation10 plyB45Sicilian Defense: Taimanov Variation9 plyB46Sicilian Defense: Taimanov Variation10 plyB47Sicilian Defense: Taimanov Variation10 plyB48Sicilian Defense: Taimanov Variation11 plyB49Sicilian Defense: Taimanov Variation13 plyB50Sicilian Defense5 plyB50Sicilian Defense: Delayed Alapin Variation5 plyB50Sicilian Defense: Kopec System5 plyB50Sicilian Defense: Kotov Gambit6 plyB50Sicilian Defense: Modern Variations4 plyB50Sicilian Defense: Wing Gambit5 plyB51Sicilian Defense: Moscow Variation5 plyB52Sicilian Defense: Moscow Variation6 plyB53Sicilian Defense: Chekhover Variation7 plyB54Sicilian Defense: Dragon Variation8 plyB54Sicilian Defense: Modern Variations8 plyB54Sicilian Defense: Prins Variation9 plyB55Sicilian Defense: Prins Variation11 plyB56Sicilian Defense: Classical Variation10 plyB56Sicilian Defense: Kupreichik Variation10 ply