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.
A54Old Indian Defense: Duz-Khotimirsky Variation9 plyA54Old Indian Defense: Tartakower-Indian6 plyA54Old Indian Defense: Two Knights Variation7 plyA54Old Indian Defense: Ukrainian Variation6 plyA55Old Indian Defense: Normal Variation9 plyA56Benoni Defense4 plyA56Benoni Defense: Czech Benoni Defense6 plyA56Benoni Defense: Hromádka System6 plyA56Benoni Defense: King's Indian System10 plyA56Benoni Defense: Weenink Variation6 plyA56Grünfeld Defense: Three Knights Variation16 plyA56Vulture Defense6 plyA57Benko Gambit6 plyA57Benko Gambit Accepted8 plyA57Benko Gambit Accepted: Dlugy Variation9 plyA57Benko Gambit Accepted: Modern Variation9 plyA57Benko Gambit Accepted: Pawn Return Variation9 plyA57Benko Gambit Declined: Bishop Attack7 plyA57Benko Gambit Declined: Hjørring Countergambit7 plyA57Benko Gambit Declined: Main Line7 plyA57Benko Gambit Declined: Pseudo-Sämisch7 plyA57Benko Gambit Declined: Quiet Line7 plyA57Benko Gambit Declined: Sosonko Variation7 plyA57Benko Gambit: Mutkin Countergambit7 plyA57Benko Gambit: Nescafe Frappe Attack15 plyA57Benko Gambit: Zaitsev System9 plyA57Benko Gambit: Zaitsev Variation13 plyA58Benko Gambit Accepted: Central Storming Variation13 plyA58Benko Gambit Accepted: Fianchetto Variation17 plyA58Benko Gambit Accepted: Fully Accepted Variation9 plyA58Benko Gambit: Fianchetto Variation15 plyA58Benko Gambit: Nd2 Variation15 plyA59Benko Gambit17 plyA59Benko Gambit Accepted: King Walk Variation21 plyA59Benko Gambit Accepted: Yugoslav13 plyA60Benoni Defense: Modern Variation6 plyA61Benoni Defense12 plyA61Benoni Defense: Fianchetto Variation13 plyA61Benoni Defense: Knight's Tour Variation13 plyA61Benoni Defense: Uhlmann Variation13 plyA62Benoni Defense: Fianchetto Variation16 plyA63Benoni Defense: Fianchetto Variation18 plyA64Benoni Defense: Fianchetto Variation22 plyA65Benoni Defense: King's Pawn Line11 plyA66Benoni Defense: Mikenas Variation15 plyA66Benoni Defense: Pawn Storm Variation13 plyA67Benoni Defense: Taimanov Variation15 plyA68Benoni Defense: Four Pawns Attack16 plyA69Benoni Defense: Four Pawns Attack18 plyA70Benoni Defense: Classical Variation13 plyA71Benoni Defense: Classical Variation15 plyA72Benoni Defense: Classical Variation16 plyA73Benoni Defense: Classical Variation17 plyA74Benoni Defense: Classical Variation19 plyA75Benoni Defense: Classical Variation20 plyA76Benoni Defense: Classical Variation18 plyA77Benoni Defense: Classical Variation19 plyA78Benoni Defense: Classical Variation20 plyA79Benoni Defense: Classical Variation21 plyA80Dutch Defense2 ply