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.
C40Latvian Gambit4 plyC40Latvian Gambit Accepted5 plyC40Latvian Gambit Accepted: Bilguer Variation9 plyC40Latvian Gambit Accepted: Bronstein Attack11 plyC40Latvian Gambit Accepted: Bronstein Gambit13 plyC40Latvian Gambit Accepted: Foltys Variation9 plyC40Latvian Gambit Accepted: Foltys-Leonhardt Variation7 plyC40Latvian Gambit Accepted: Leonhardt Variation9 plyC40Latvian Gambit Accepted: Main Line7 plyC40Latvian Gambit Accepted: Nimzowitsch Attack11 plyC40Latvian Gambit: Behting Variation14 plyC40Latvian Gambit: Corkscrew Countergambit8 plyC40Latvian Gambit: Corkscrew Gambit12 plyC40Latvian Gambit: Diepstraten Countergambit5 plyC40Latvian Gambit: Fraser Defense6 plyC40Latvian Gambit: Greco Variation6 plyC40Latvian Gambit: Lobster Gambit5 plyC40Latvian Gambit: Mason Countergambit5 plyC40Latvian Gambit: Mayet Attack5 plyC40Latvian Gambit: Mlotkowski Variation5 plyC40Latvian Gambit: Senechaud Gambit5 plyC41Philidor Defense4 plyC41Philidor Defense: Albin-Blackburne Gambit8 plyC41Philidor Defense: Berger Variation19 plyC41Philidor Defense: Bird Gambit7 plyC41Philidor Defense: Boden Variation8 plyC41Philidor Defense: Exchange Variation6 plyC41Philidor Defense: Hanham9 plyC41Philidor Defense: Hanham Variation6 plyC41Philidor Defense: Larsen Variation8 plyC41Philidor Defense: Lion Variation8 plyC41Philidor Defense: Lopez Countergambit6 plyC41Philidor Defense: Morphy Gambit7 plyC41Philidor Defense: Nimzowitsch7 plyC41Philidor Defense: Nimzowitsch Variation6 plyC41Philidor Defense: Paulsen Attack9 plyC41Philidor Defense: Philidor Countergambit6 plyC41Philidor Defense: Philidor Gambit6 plyC41Philidor Defense: Steinitz Variation7 plyC42Petrov's Defense4 plyC42Petrov's Defense: Classical Attack9 plyC42Petrov's Defense: Cochrane Gambit7 plyC42Petrov's Defense: Cozio Attack9 plyC42Petrov's Defense: Damiano Variation6 plyC42Petrov's Defense: French Attack9 plyC42Petrov's Defense: Italian Variation5 plyC42Petrov's Defense: Karklins-Martinovsky Variation7 plyC42Petrov's Defense: Kaufmann Attack9 plyC42Petrov's Defense: Millennium Attack9 plyC42Petrov's Defense: Moody Gambit7 plyC42Petrov's Defense: Nimzowitsch Attack9 plyC42Petrov's Defense: Paulsen Attack7 plyC42Petrov's Defense: Stafford Gambit6 plyC42Petrov's Defense: Three Knights Game5 plyC43Bishop's Opening: Urusov Gambit7 plyC43Petrov's Defense: Modern Attack5 plyC44Dresden Opening: The Goblin7 plyC44Irish Gambit5 plyC44King's Knight Opening: Konstantinopolsky5 plyC44King's Knight Opening: Normal Variation4 ply