3810 ECO lines with main-line moves and diagrams. Start with the flagship families, or browse by volume.
| Name | ECO | Moves |
|---|
| Modern Defense: Norwegian Defense, Norwegian Gambit | B06 | 8 |
| Modern Defense: Pseudo-Austrian Attack | B06 | 7 |
| Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation Declined | B06 | 10 |
| Modern Defense: Standard Defense | B06 | 6 |
| Modern Defense: Standard Line | B06 | 5 |
| Modern Defense: Three Pawns Attack | B06 | 5 |
| Modern Defense: Two Knights Variation | B06 | 7 |
| Modern Defense: Two Knights Variation, Suttles Variation | B06 | 8 |
| Modern Defense: Two Knights Variation, Suttles Variation, Tal Gambit | B06 | 12 |
| Modern Defense: Westermann Gambit | B06 | 5 |
| Modern Defense: Wind Gambit | B06 | 5 |
| Pterodactyl Defense: Austrian, Austriadactylus Western | B06 | 8 |
| Pterodactyl Defense: Austrian, Grand Prix Pterodactyl | B06 | 8 |
| Pterodactyl Defense: Austrian, Pteranodon | B06 | 8 |
| Pterodactyl Defense: Central, Anhanguera | B06 | 10 |
| Pterodactyl Defense: Central, Benoni Quetzalcoatlus | B06 | 10 |
| Pterodactyl Defense: Central, Quetzalcoatlus Gambit | B06 | 10 |
| Pterodactyl Defense: Eastern, Anhanguera | B06 | 7 |
| Pterodactyl Defense: Eastern, Benoni | B06 | 7 |
| Pterodactyl Defense: Eastern, Benoni Pteranodon | B06 | 10 |
| Pterodactyl Defense: Eastern, Benoni Pterodactyl | B06 | 8 |
| Pterodactyl Defense: Eastern, Pteranodon | B06 | 10 |
| Pterodactyl Defense: Eastern, Rhamphorhynchus | B06 | 8 |
| Pterodactyl Defense: Fianchetto, King Pterodactyl | B06 | 8 |
| Pterodactyl Defense: Fianchetto, Rhamphorhynchus | B06 | 8 |
| Pterodactyl Defense: Sicilian, Quetzalcoatlus | B06 | 10 |
| Pterodactyl Defense: Sicilian, Siroccopteryx | B06 | 9 |
| Pterodactyl Defense: Western, Anhanguera | B06 | 8 |
| Pterodactyl Defense: Western, Siroccopteryx | B06 | 10 |
| Rat Defense: Accelerated Gurgenidze | B06 | 6 |
| Czech Defense | B07 | 6 |
| King's Pawn Game: Maróczy Defense | B07 | 4 |
| Lion Defense | B07 | 6 |
| Lion Defense: Anti-Philidor | B07 | 7 |
| Lion Defense: Anti-Philidor, Lion's Cave | B07 | 8 |
| Lion Defense: Anti-Philidor, Lion's Cave, Lion Claw Gambit | B07 | 14 |
| Lion Defense: Bayonet Attack | B07 | 7 |
| Modern Defense: Geller's System | B07 | 7 |
| Pirc Defense | B07 | 6 |
| Pirc Defense: 150 Attack | B07 | 9 |
| Pirc Defense: 150 Attack, Inner Doll Defense | B07 | 10 |
| Pirc Defense: 150 Attack, Sveshnikov-Jansa Attack | B07 | 9 |
| Pirc Defense: Bayonet Attack | B07 | 9 |
| Pirc Defense: Byrne Variation | B07 | 7 |
| Pirc Defense: Chinese Variation | B07 | 9 |
| Pirc Defense: Kholmov System | B07 | 7 |
| Pirc Defense: Sveshnikov System | B07 | 7 |
| Pirc Defense: Classical Variation | B08 | 7 |
| Pirc Defense: Classical Variation | B08 | 8 |
| Pirc Defense: Classical Variation, Quiet System | B08 | 9 |
| Pirc Defense: Classical Variation, Quiet System, Chigorin Line | B08 | 12 |
| Pirc Defense: Classical Variation, Quiet System, Czech Defense | B08 | 12 |
| Pirc Defense: Classical Variation, Quiet System, Parma Defense | B08 | 12 |
| Pirc Defense: Classical Variation, Schlechter Variation | B08 | 9 |
| Pirc Defense: Austrian Attack | B09 | 7 |
| Pirc Defense: Austrian Attack | B09 | 10 |
| Pirc Defense: Austrian Attack, Dragon Formation | B09 | 10 |
| Pirc Defense: Austrian Attack, Kurajica Variation | B09 | 11 |
| Pirc Defense: Austrian Attack, Ljubojevic Variation | B09 | 9 |
| Pirc Defense: Austrian Attack, Unzicker Attack | B09 | 11 |
| Pirc Defense: Austrian Attack, Unzicker Attack, Bronstein Variation | B09 | 13 |
| Pirc Defense: Austrian Attack, Weiss Variation | B09 | 11 |
| Caro-Kann Defense | B10 | 2 |
| Caro-Kann Defense | B10 | 3 |
| Caro-Kann Defense | B10 | 4 |
| Caro-Kann Defense: Accelerated Panov Attack | B10 | 3 |
| Caro-Kann Defense: Accelerated Panov Attack | B10 | 4 |
| Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | B10 | 8 |
| Caro-Kann Defense: Accelerated Panov Attack, Open Variation | B10 | 4 |
| Caro-Kann Defense: Accelerated Panov Attack, Pseudo-Scandinavian | B10 | 6 |
| Caro-Kann Defense: Accelerated Panov Attack, Van Weersel Attack | B10 | 7 |
| Caro-Kann Defense: Apocalypse Attack | B10 | 7 |
| Caro-Kann Defense: Breyer Variation | B10 | 3 |
| Caro-Kann Defense: Breyer Variation, Stein Attack | B10 | 15 |
| Caro-Kann Defense: Dinic Gambit | B10 | 7 |
| Caro-Kann Defense: Endgame Offer | B10 | 5 |
| Caro-Kann Defense: Endgame Variation | B10 | 9 |
| Caro-Kann Defense: Euwe Attack | B10 | 3 |
| Caro-Kann Defense: Goldman Variation | B10 | 5 |
| Caro-Kann Defense: Hector Gambit | B10 | 7 |
| Caro-Kann Defense: Hillbilly Attack | B10 | 3 |
| Caro-Kann Defense: Hillbilly Attack, Schaeffer Gambit | B10 | 7 |
| Caro-Kann Defense: Labahn Attack | B10 | 3 |
| Caro-Kann Defense: Labahn Attack, Double Gambit | B10 | 5 |
| Caro-Kann Defense: Labahn Attack, Polish Variation | B10 | 5 |
| Caro-Kann Defense: Scorpion-Horus Gambit | B10 | 7 |
| Caro-Kann Defense: Spike Variation | B10 | 3 |
| Caro-Kann Defense: Spike Variation, Scorpion-Grob Gambit | B10 | 7 |
| Caro-Kann Defense: St. Patrick's Attack | B10 | 5 |
| Caro-Kann Defense: Toikkanen Gambit | B10 | 5 |
| Caro-Kann Defense: Two Knights Attack | B10 | 5 |
| Caro-Kann Defense: Two Knights Attack, Mindeno Variation | B11 | 6 |
| Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | B11 | 8 |
| Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Retreat Line | B11 | 8 |
| Caro-Kann Defense | B12 | 3 |
| Caro-Kann Defense | B12 | 4 |
| Caro-Kann Defense: Advance Variation | B12 | 5 |
| Caro-Kann Defense: Advance Variation, Bayonet Attack | B12 | 7 |
| Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | B12 | 6 |
| Caro-Kann Defense: Advance Variation, Bronstein Variation | B12 | 7 |
Family pages group related lines: the family head with a diagram, main continuations and every catalogued variation.