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.
A11English Opening: Caro-Kann Defensive System2 plyA11Réti Opening: Anglo-Slav Variation5 plyA12Réti Opening: Anglo-Slav Variation5 plyA13English Opening: Agincourt Defense2 plyA13English Opening: Neo-Catalan6 plyA13English Opening: Neo-Catalan Declined8 plyA13English Opening: Romanishin Gambit8 plyA14English Opening: Agincourt Defense9 plyA14Réti Opening: Anglo-Slav Variation11 plyA15English Opening: Anglo-Indian Defense2 plyA15English Orangutan3 plyA16English Opening: Anglo-Grünfeld Defense4 plyA16English Opening: Anglo-Indian Defense3 plyA17English Opening: Anglo-Indian Defense4 plyA18English Opening: Mikenas-Carls Variation5 plyA19English Opening: Anglo-Indian Defense8 plyA19English Opening: Mikenas-Carls6 plyA20English Opening: Drill Variation4 plyA20English Opening: King's English Variation2 plyA21English Opening: King's English Variation3 plyA22English Opening: Carls-Bremen System5 plyA22English Opening: King's English5 plyA22English Opening: King's English Variation4 plyA23English Opening: King's English Variation6 plyA24English Opening: King's English Variation6 plyA25English Opening: Closed10 plyA25English Opening: King's English Variation4 plyA26English Opening: King's English Variation10 plyA27English Opening: King's English Variation5 plyA28English Opening: Four Knights System7 plyA28English Opening: King's English Variation6 plyA29English Opening: King's English Variation7 plyA30English Opening: Symmetrical20 plyA30English Opening: Symmetrical Variation2 plyA30English Opening: Wing Gambit3 plyA31English Opening: Symmetrical Variation5 plyA32English Opening: Symmetrical Variation8 plyA33English Opening: Symmetrical Variation10 plyA34English Opening: Symmetrical Variation3 plyA35English Opening: Symmetrical Variation4 plyA36English Opening: Symmetrical Variation5 plyA37English Opening: Symmetrical Variation9 plyA38English Opening: Symmetrical Variation10 plyA39English Opening: Symmetrical Variation13 plyA40Australian Defense2 plyA40Benoni Defense: Franco-Sicilian Hybrid14 plyA40Borg Defense: Borg Gambit2 plyA40Colle System: Pterodactyl Variation8 plyA40Colle System: Siroccopteryx Variation10 plyA40English Defense2 plyA40English Defense: Eastbourne Gambit6 plyA40English Defense: Hartlaub Gambit Accepted10 plyA40English Defense: Hartlaub Gambit Declined9 plyA40English Defense: Perrin Variation8 plyA40English Defense: Poli Gambit10 plyA40Englund Gambit2 plyA40Englund Gambit Declined3 plyA40Englund Gambit Declined: Diemer Counterattack6 plyA40Englund Gambit Declined: Reversed Alekhine3 plyA40Englund Gambit Declined: Reversed Brooklyn5 ply