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.
D46Semi-Slav Defense: Chigorin Defense12 plyD46Semi-Slav Defense: Main Line11 plyD46Semi-Slav Defense: Romih Variation12 plyD47Semi-Slav Defense: Meran Variation14 plyD47Semi-Slav Defense: Semi-Meran Variation13 plyD48Semi-Slav Defense: Meran Variation16 plyD49Semi-Slav Defense: Meran Variation21 plyD50Queen's Gambit Declined: Been-Koomen Variation8 plyD50Queen's Gambit Declined: Modern Variation7 plyD50Queen's Gambit Declined: Pseudo-Tarrasch Variation9 plyD50Queen's Gambit Declined: Semi-Tarrasch Defense15 plyD51Queen's Gambit Declined: Alekhine Variation11 plyD51Queen's Gambit Declined: Capablanca Variation11 plyD51Queen's Gambit Declined: Manhattan Variation10 plyD51Queen's Gambit Declined: Modern Variation8 plyD51Queen's Gambit Declined: Rochlin Variation13 plyD52Queen's Gambit Declined11 plyD52Queen's Gambit Declined: Cambridge Springs Defense12 plyD53Queen's Gambit Declined8 plyD53Queen's Gambit Declined: Lasker Defense10 plyD53Queen's Gambit Declined: Modern Variation9 plyD53Queen's Gambit Declined: Uhlmann Variation14 plyD54Queen's Gambit Declined: Neo-Orthodox Variation11 plyD55Queen's Gambit Declined: Anti-Tartakower Variation13 plyD55Queen's Gambit Declined: Modern Variation11 plyD55Queen's Gambit Declined: Neo-Orthodox Variation12 plyD55Queen's Gambit Declined: Pillsbury Attack17 plyD56Queen's Gambit Declined: Lasker Defense14 plyD57Queen's Gambit Declined: Lasker Defense19 plyD58Queen's Gambit Declined: Tartakower Defense14 plyD59Queen's Gambit Declined: Tartakower Defense16 plyD60Queen's Gambit Declined: Orthodox Defense12 plyD61Queen's Gambit Declined: Orthodox Defense13 plyD62Queen's Gambit Declined: Orthodox Defense15 plyD63Queen's Gambit Declined: Orthodox Defense13 plyD64Queen's Gambit Declined: Orthodox Defense15 plyD65Queen's Gambit Declined: Orthodox Defense17 plyD66Queen's Gambit Declined: Orthodox Defense15 plyD67Queen's Gambit Declined: Orthodox Defense18 plyD68Queen's Gambit Declined: Orthodox Defense24 plyD69Queen's Gambit Declined: Orthodox Defense28 plyD70Neo-Grünfeld Defense: Goglidze Attack6 plyD70Neo-Grünfeld Defense: with Nf36 plyD70Neo-Grünfeld Defense: with g36 plyD71Neo-Grünfeld Defense: Exchange Variation10 plyD72Neo-Grünfeld Defense: with g313 plyD73Neo-Grünfeld Defense: with g39 plyD74Neo-Grünfeld Defense: Delayed Exchange Variation13 plyD75Neo-Grünfeld Defense: Delayed Exchange Variation15 plyD76Neo-Grünfeld Defense: Delayed Exchange Variation14 plyD77Neo-Grünfeld Defense: Classical Variation11 plyD78Neo-Grünfeld Defense: Classical Variation12 plyD79Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation14 plyD80Grünfeld Defense6 plyD80Grünfeld Defense: Gibbon Gambit7 plyD80Grünfeld Defense: Lundin Variation12 plyD80Grünfeld Defense: Lutikov Variation7 plyD80Grünfeld Defense: Stockholm Variation7 plyD80Grünfeld Defense: Zaitsev Gambit7 plyD81Grünfeld Defense: Russian Variation7 ply