3810 ECO lines with main-line moves and diagrams. Start with the flagship families, or browse by volume.
| Name | ECO | Moves |
| Queen's Pawn Game: Chigorin Variation | A45 | 4 |
| Queen's Pawn Game: Veresov, Richter Attack | A45 | 5 |
| Trompowsky Attack | A45 | 3 |
| Trompowsky Attack: Borg Variation | A45 | 6 |
| Trompowsky Attack: Classical Defense | A45 | 4 |
| Trompowsky Attack: Classical Defense, Big Center Variation | A45 | 5 |
| Trompowsky Attack: Edge Variation | A45 | 5 |
| Trompowsky Attack: Edge Variation, Hergert Gambit | A45 | 13 |
| Trompowsky Attack: Edge Variation, Hergert Gambit | A45 | 11 |
| Trompowsky Attack: Poisoned Pawn Variation | A45 | 7 |
| Trompowsky Attack: Raptor Variation | A45 | 5 |
| Trompowsky Attack: Raptor Variation, Hergert Gambit | A45 | 8 |
| Döry Defense | A46 | 4 |
| Indian Defense: Czech-Indian | A46 | 4 |
| Indian Defense: Knights Variation | A46 | 3 |
| Indian Defense: Knights Variation, Alburt-Miles Variation | A46 | 4 |
| Indian Defense: London System | A46 | 5 |
| Indian Defense: Polish Variation | A46 | 4 |
| Indian Defense: Spielmann-Indian | A46 | 4 |
| Indian Defense: Wade-Tartakower Defense | A46 | 4 |
| Queen's Pawn Game: Torre Attack, Breyer Variation | A46 | 10 |
| Queen's Pawn Game: Veresov Attack, Classical Defense | A46 | 7 |
| Torre Attack: Classical Defense | A46 | 5 |
| Torre Attack: Classical Defense, Nimzowitsch Variation | A46 | 6 |
| Torre Attack: Classical Defense, Petrosian Gambit | A46 | 9 |
| Torre Attack: Wagner Gambit | A46 | 7 |
| Yusupov-Rubinstein System | A46 | 5 |
| Indian Defense: Schnepper Gambit | A47 | 6 |
| Marienbad System | A47 | 8 |
| Marienbad System: Berg Variation | A47 | 11 |
| Pseudo Queen's Indian Defense | A47 | 4 |
| Pseudo Queen's Indian Defense | A47 | 12 |
| East Indian Defense | A48 | 4 |
| Indian Defense: Colle System, King's Indian Variation | A48 | 8 |
| London System | A48 | 5 |
| London System | A48 | 7 |
| London System | A48 | 8 |
| London System, with Bd3 | A48 | 9 |
| London System, with Be2 | A48 | 9 |
| London System, with Be2 | A48 | 10 |
| London System, with Be2 | A48 | 11 |
| Queen's Pawn Game: Barry Attack | A48 | 7 |
| Queen's Pawn Game: Barry Attack | A48 | 8 |
| Queen's Pawn Game: Barry Attack, Grünfeld Variation | A48 | 11 |
| Queen's Pawn Game: Barry Attack, Tarzan Attack | A48 | 9 |
| Queen's Pawn Game: Torre Attack, Grünfeld Variation, Main Line | A48 | 10 |
| Torre Attack: Fianchetto Defense | A48 | 5 |
| Torre Attack: Fianchetto Defense, Euwe Variation | A48 | 8 |
| Indian Defense: Przepiorka Variation | A49 | 5 |
| Indian Defense: Medusa Gambit | A50 | 4 |
| Indian Defense: Normal Variation | A50 | 3 |
| Indian Defense: Pyrenees Gambit | A50 | 4 |
| Mexican Defense | A50 | 4 |
| Mexican Defense: Horsefly Gambit | A50 | 7 |
| Queen's Indian Accelerated | A50 | 4 |
| Slav Indian | A50 | 4 |
| Indian Defense: Budapest Gambit | A51 | 4 |
| Indian Defense: Budapest Gambit Accepted | A51 | 5 |
| Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense | A51 | 6 |
| Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Bonsdorf Variation | A51 | 7 |
| Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Steiner Variation | A51 | 7 |
| Indian Defense: Budapest Gambit Accepted, Main Line | A52 | 6 |
| Indian Defense: Budapest Gambit Accepted, Main Line, Adler Variation | A52 | 7 |
| Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation | A52 | 7 |
| Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation, Abonyi Variation | A52 | 8 |
| Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation, Tartakower Defense | A52 | 8 |
| Indian Defense: Budapest Gambit Accepted, Main Line, Rubinstein Variation | A52 | 7 |
| Old Indian Defense | A53 | 4 |
| Old Indian Defense: Aged Gibbon Gambit | A53 | 5 |
| Old Indian Defense: Czech Variation, with Nc3 | A53 | 6 |
| Old Indian Defense: Czech Variation, with Nf3 | A53 | 6 |
| Old Indian Defense: Janowski Variation | A53 | 6 |
| Old Indian Defense: Janowski Variation, Fianchetto Variation | A53 | 7 |
| Old Indian Defense: Janowski Variation, Grinberg Gambit | A53 | 7 |
| Old Indian Defense: Janowski Variation, Main Line | A53 | 7 |
| Old Indian Defense: Duz-Khotimirsky Variation | A54 | 9 |
| Old Indian Defense: Tartakower-Indian | A54 | 6 |
| Old Indian Defense: Two Knights Variation | A54 | 7 |
| Old Indian Defense: Ukrainian Variation | A54 | 6 |
| Old Indian Defense: Normal Variation | A55 | 9 |
| Benoni Defense | A56 | 4 |
| Benoni Defense: Czech Benoni Defense | A56 | 6 |
| Benoni Defense: Hromádka System | A56 | 6 |
| Benoni Defense: King's Indian System | A56 | 10 |
| Benoni Defense: Weenink Variation | A56 | 6 |
| Grünfeld Defense: Three Knights Variation, Burille Variation, Reversed Tarrasch | A56 | 16 |
| Vulture Defense | A56 | 6 |
| Benko Gambit | A57 | 6 |
| Benko Gambit Accepted | A57 | 8 |
| Benko Gambit Accepted: Dlugy Variation | A57 | 9 |
| Benko Gambit Accepted: Modern Variation | A57 | 9 |
| Benko Gambit Accepted: Pawn Return Variation | A57 | 9 |
| Benko Gambit Declined: Bishop Attack | A57 | 7 |
| Benko Gambit Declined: Hjørring Countergambit | A57 | 7 |
| Benko Gambit Declined: Main Line | A57 | 7 |
| Benko Gambit Declined: Pseudo-Sämisch | A57 | 7 |
| Benko Gambit Declined: Quiet Line | A57 | 7 |
| Benko Gambit Declined: Sosonko Variation | A57 | 7 |
| Benko Gambit: Mutkin Countergambit | A57 | 7 |
| Benko Gambit: Nescafe Frappe Attack | A57 | 15 |
Family pages group related lines: the family head with a diagram, main continuations and every catalogued variation.