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.
C20King's Pawn Game: Leonardis Variation3 plyC20King's Pawn Game: MacLeod Attack3 plyC20King's Pawn Game: Mengarini's Opening3 plyC20King's Pawn Game: Napoleon Attack3 plyC20King's Pawn Game: Philidor Gambit6 plyC20King's Pawn Game: Tortoise Opening3 plyC20King's Pawn Game: Wayward Queen Attack3 plyC20King's Pawn Game: Weber Gambit8 plyC20King's Pawn Opening3 plyC20King's Pawn Opening: Speers5 plyC20King's Pawn Opening: Van Hooydoon Gambit12 plyC20Portuguese Opening3 plyC20Portuguese Opening: Miguel Gambit5 plyC20Portuguese Opening: Portuguese Gambit5 plyC21Center Game5 plyC21Center Game Accepted4 plyC21Center Game: Halasz-McDonnell Gambit5 plyC21Center Game: Kieseritzky Variation5 plyC21Center Game: Lanc-Arnold Gambit7 plyC21Center Game: Ross Gambit5 plyC21Center Game: von der Lasa Gambit5 plyC21Danish Gambit5 plyC21Danish Gambit Accepted6 plyC21Danish Gambit Accepted: Chigorin Defense10 plyC21Danish Gambit Accepted: Classical Defense10 plyC21Danish Gambit Accepted: Copenhagen Defense10 plyC21Danish Gambit Accepted: Schlechter Defense10 plyC21Danish Gambit Accepted: Svenonius Defense6 plyC21Danish Gambit Declined: Sörensen Defense6 plyC22Center Game: Berger Variation8 plyC22Center Game: Charousek Variation10 plyC22Center Game: Hall Variation7 plyC22Center Game: Kupreichik Variation17 plyC22Center Game: Normal Variation6 plyC22Center Game: Paulsen Attack Variation7 plyC22Center Game: l'Hermet Variation8 plyC23Bishop's Opening3 plyC23Bishop's Opening: Anderssen Gambit6 plyC23Bishop's Opening: Boi Variation4 plyC23Bishop's Opening: Calabrese Countergambit4 plyC23Bishop's Opening: Four Pawns Gambit17 plyC23Bishop's Opening: Khan Gambit4 plyC23Bishop's Opening: Lewis Countergambit6 plyC23Bishop's Opening: Lewis Gambit5 plyC23Bishop's Opening: Lisitsyn Variation15 plyC23Bishop's Opening: Lopez Gambit9 plyC23Bishop's Opening: Lopez Variation5 plyC23Bishop's Opening: McDonnell Gambit5 plyC23Bishop's Opening: Philidor Counterattack4 plyC23Bishop's Opening: Philidor Variation5 plyC23Bishop's Opening: Pratt Variation14 plyC23Bishop's Opening: Stein Gambit5 plyC23Bishop's Opening: Thorold Gambit6 plyC23Bishop's Opening: del Rio Variation6 plyC24Bishop's Opening: Berlin Defense4 plyC24Bishop's Opening: Kitchener Folly8 plyC24Bishop's Opening: Krejcik Gambit9 plyC24Bishop's Opening: Pachman Gambit7 plyC24Bishop's Opening: Paulsen Defense6 plyC24Bishop's Opening: Ponziani Gambit5 ply