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.
D30Queen's Gambit Declined: Traditional Variation7 plyD30Queen's Gambit Declined: Vienna Variation8 plyD30Semi-Slav Defense: Quiet Variation9 plyD31Queen's Gambit Declined: Alapin Variation6 plyD31Queen's Gambit Declined: Charousek Variation6 plyD31Queen's Gambit Declined: Janowski Variation6 plyD31Queen's Gambit Declined: Queen's Knight Variation5 plyD31Queen's Gambit Declined: Semi-Slav14 plyD31Semi-Slav Defense: Accelerated Move Order6 plyD31Semi-Slav Defense: Anti-Noteboom9 plyD31Semi-Slav Defense: Gunderam Gambit9 plyD31Semi-Slav Defense: Marshall Gambit7 plyD31Semi-Slav Defense: Noteboom Variation8 plyD32Queen's Gambit Declined: Tarrasch Defense8 plyD32Tarrasch Defense6 plyD32Tarrasch Defense: Grünfeld Gambit14 plyD32Tarrasch Defense: Marshall Gambit9 plyD32Tarrasch Defense: Schara Gambit8 plyD32Tarrasch Defense: Symmetrical Variation10 plyD32Tarrasch Defense: Tarrasch Gambit12 plyD32Tarrasch Defense: Two Knights Variation9 plyD32Tarrasch Defense: von Hennig Gambit14 plyD33Tarrasch Defense: Dubov Tarrasch16 plyD33Tarrasch Defense: Prague Variation12 plyD33Tarrasch Defense: Rubinstein System11 plyD33Tarrasch Defense: Swedish Variation12 plyD33Tarrasch Defense: Wagner Variation14 plyD34Queen's Gambit Declined: Tarrasch Defense20 plyD34Tarrasch Defense: Classical Variation16 plyD34Tarrasch Defense: Prague Variation14 plyD35Queen's Gambit Declined: Exchange Variation7 plyD35Queen's Gambit Declined: Harrwitz Attack7 plyD35Queen's Gambit Declined: Normal Defense6 plyD36Queen's Gambit Declined: Exchange Variation11 plyD37Queen's Gambit Declined: Barmen Variation8 plyD37Queen's Gambit Declined: Harrwitz Attack9 plyD37Queen's Gambit Declined: Knight Defense12 plyD37Queen's Gambit Declined: Miles Variation11 plyD37Queen's Gambit Declined: Three Knights8 plyD37Queen's Gambit Declined: Three Knights Variation7 plyD37Queen's Gambit Declined: Vienna Variation9 plyD38Queen's Gambit Declined: Ragozin Defense8 plyD38Queen's Gambit Declined: Westphalian Variation12 plyD39Queen's Gambit Declined: Ragozin Defense10 plyD40Queen's Gambit Declined: Semi-Tarrasch Defense8 plyD41Queen's Gambit Declined: Semi-Tarrasch Defense9 plyD42Queen's Gambit Declined: Semi-Tarrasch Defense13 plyD43Semi-Slav Defense8 plyD43Semi-Slav Defense: Anti-Moscow Gambit11 plyD43Semi-Slav Defense: Hastings Variation13 plyD43Semi-Slav Defense: Moscow Variation12 plyD44Semi-Slav Defense Accepted10 plyD44Semi-Slav Defense: Botvinnik Variation11 plyD45Semi-Slav Defense: Accelerated Meran Variation10 plyD45Semi-Slav Defense: Main Line9 plyD45Semi-Slav Defense: Normal Variation10 plyD45Semi-Slav Defense: Rubinstein System11 plyD45Semi-Slav Defense: Stoltz Variation11 plyD45Semi-Slav Defense: Stonewall Defense12 plyD46Semi-Slav Defense: Bogoljubow Variation12 ply