3810 ECO lines with main-line moves and diagrams. Start with the flagship families, or browse by volume.
| Name | ECO | Moves |
|---|
| Sicilian Defense: Coles Sicilian Gambit | B21 | 9 |
| Sicilian Defense: Halasz Gambit | B21 | 5 |
| Sicilian Defense: McDonnell Attack | B21 | 3 |
| Sicilian Defense: McDonnell Attack, Tal Gambit | B21 | 6 |
| Sicilian Defense: McDonnell Attack, Toilet Variation | B21 | 5 |
| Sicilian Defense: Morphy Gambit | B21 | 5 |
| Sicilian Defense: Morphy Gambit, Andreaschek Gambit | B21 | 7 |
| Sicilian Defense: Smith-Morra Gambit | B21 | 3 |
| Sicilian Defense: Smith-Morra Gambit | B21 | 5 |
| Sicilian Defense: Smith-Morra Gambit Accepted | B21 | 6 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Chicago Defense | B21 | 18 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Chicago Defense | B21 | 14 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Classical Formation | B21 | 14 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Danish Variation | B21 | 7 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Fianchetto Defense | B21 | 8 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Fianchetto Defense | B21 | 10 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Fianchetto Defense | B21 | 12 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Fianchetto Defense | B21 | 10 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Finegold Defense | B21 | 16 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Kan Formation | B21 | 10 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Larsen Defense | B21 | 16 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Morphy Defense | B21 | 12 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Morphy Defense Deferred | B21 | 16 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Paulsen Formation | B21 | 12 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Pin Defense | B21 | 12 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Scheveningen Formation | B21 | 12 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation | B21 | 12 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation, Siberian Trap | B21 | 16 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Sozin Formation | B21 | 16 |
| Sicilian Defense: Smith-Morra Gambit Accepted, Taimanov Formation | B21 | 12 |
| Sicilian Defense: Smith-Morra Gambit Declined, Alapin Formation | B21 | 6 |
| Sicilian Defense: Smith-Morra Gambit Declined, Center Formation | B21 | 6 |
| Sicilian Defense: Smith-Morra Gambit Declined, Dubois Variation | B21 | 7 |
| Sicilian Defense: Smith-Morra Gambit Declined, Push Variation | B21 | 6 |
| Sicilian Defense: Smith-Morra Gambit Declined, Scandinavian Formation | B21 | 6 |
| Sicilian Defense: Smith-Morra Gambit Declined, Wing Formation | B21 | 6 |
| Sicilian Defense: Alapin Variation | B22 | 3 |
| Sicilian Defense: Alapin Variation, Anti-Alapin Gambit | B22 | 6 |
| Sicilian Defense: Alapin Variation, Barmen Defense | B22 | 6 |
| Sicilian Defense: Alapin Variation, Barmen Defense | B22 | 9 |
| Sicilian Defense: Alapin Variation, Barmen Defense | B22 | 9 |
| Sicilian Defense: Alapin Variation, Barmen Defense, Central Exchange | B22 | 12 |
| Sicilian Defense: Alapin Variation, Barmen Defense, Endgame Variation | B22 | 18 |
| Sicilian Defense: Alapin Variation, Barmen Defense, Milner-Barry Attack | B22 | 15 |
| Sicilian Defense: Alapin Variation, Barmen Defense, Modern Line | B22 | 10 |
| Sicilian Defense: Alapin Variation, Smith-Morra Declined | B22 | 8 |
| Sicilian Defense: Alapin Variation, Stoltz Attack | B22 | 11 |
| Sicilian Defense: Alapin Variation, Stoltz Attack, Ivanchuk Line | B22 | 16 |
| Sicilian Defense: Delayed Alapin Variation | B22 | 10 |
| Sicilian Defense: Delayed Alapin Variation | B22 | 13 |
| Sicilian Defense: Heidenfeld Variation | B22 | 9 |
| Sicilian Defense: Closed | B23 | 3 |
| Sicilian Defense: Closed | B23 | 4 |
| Sicilian Defense: Closed | B23 | 5 |
| Sicilian Defense: Closed, Carlsen Variation | B23 | 9 |
| Sicilian Defense: Closed, Chameleon Variation | B23 | 5 |
| Sicilian Defense: Closed, Grob Attack | B23 | 5 |
| Sicilian Defense: Closed, Korchnoi Defense | B23 | 6 |
| Sicilian Defense: Closed, Portland Attack | B23 | 7 |
| Sicilian Defense: Closed, Traditional | B23 | 4 |
| Sicilian Defense: Grand Prix Attack | B23 | 5 |
| Sicilian Defense: Grand Prix Attack, Schofman Variation | B23 | 11 |
| Sicilian Defense: Closed | B24 | 6 |
| Sicilian Defense: Closed | B24 | 8 |
| Sicilian Defense: Closed, Fianchetto Variation | B24 | 5 |
| Sicilian Defense: Closed, Smyslov Variation | B24 | 13 |
| Sicilian Defense: Closed | B25 | 10 |
| Sicilian Defense: Closed | B25 | 11 |
| Sicilian Defense: Closed, Botvinnik Defense, Edge Variation | B25 | 14 |
| Sicilian Defense: Closed, Botvinnik Defense, with Nge2 | B25 | 12 |
| Sicilian Defense: Closed, Botvinnik Defense, with f4 | B25 | 12 |
| Sicilian Defense: Closed | B26 | 11 |
| Modern Defense: Pterodactyl Variation | B27 | 8 |
| Pterodactyl Defense: Sicilian, Anhanguera | B27 | 9 |
| Pterodactyl Defense: Sicilian, Benoni Gambit | B27 | 9 |
| Pterodactyl Defense: Sicilian, Pteranodon | B27 | 11 |
| Pterodactyl Defense: Sicilian, Rhamphorhynchus | B27 | 9 |
| Pterodactyl Defense: Sicilian, Unpin | B27 | 9 |
| Pterodactyl Defense: Western, Pterodactyl | B27 | 8 |
| Pterodactyl Defense: Western, Rhamphorhynchus | B27 | 8 |
| Sicilian Defense | B27 | 3 |
| Sicilian Defense: Acton Extension | B27 | 6 |
| Sicilian Defense: Brussels Gambit | B27 | 4 |
| Sicilian Defense: Bücker Variation | B27 | 4 |
| Sicilian Defense: Double-Dutch Gambit | B27 | 6 |
| Sicilian Defense: Frederico Variation | B27 | 6 |
| Sicilian Defense: Hyperaccelerated Dragon | B27 | 4 |
| Sicilian Defense: Hyperaccelerated Dragon | B27 | 5 |
| Sicilian Defense: Hyperaccelerated Pterodactyl | B27 | 6 |
| Sicilian Defense: Hyperaccelerated Pterodactyl, Exchange Variation | B27 | 12 |
| Sicilian Defense: Jalalabad Variation | B27 | 4 |
| Sicilian Defense: Katalimov Variation | B27 | 4 |
| Sicilian Defense: Mongoose Variation | B27 | 4 |
| Sicilian Defense: Polish Gambit | B27 | 4 |
| Sicilian Defense: Quinteros Variation | B27 | 4 |
| Sicilian Defense: O'Kelly Variation | B28 | 4 |
| Sicilian Defense: O'Kelly Variation, Aronin System | B28 | 5 |
| Sicilian Defense: O'Kelly Variation, Kieseritzky System | B28 | 5 |
| Sicilian Defense: O'Kelly Variation, Maróczy Bind | B28 | 5 |
| Sicilian Defense: O'Kelly Variation, Maróczy Bind, Paulsen Line | B28 | 6 |
Family pages group related lines: the family head with a diagram, main continuations and every catalogued variation.