3810 ECO lines with main-line moves and diagrams. Start with the flagship families, or browse by volume.
| Name | ECO | Moves |
| Four Knights Game: Spanish Variation, Bardeleben Variation | C48 | 18 |
| Four Knights Game: Spanish Variation, Classical Variation | C48 | 8 |
| Four Knights Game: Spanish Variation, Ranken Variation | C48 | 9 |
| Four Knights Game: Spanish Variation, Rubinstein Variation | C48 | 8 |
| Four Knights Game: Spanish Variation, Rubinstein Variation | C48 | 9 |
| Four Knights Game: Spanish Variation, Rubinstein Variation | C48 | 11 |
| Four Knights Game: Spanish Variation, Rubinstein Variation Accepted | C48 | 9 |
| Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation | C48 | 9 |
| Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall Gambit | C48 | 12 |
| Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall Variation | C48 | 12 |
| Four Knights Game: Spanish Variation, Rubinstein Variation, Maróczy Variation | C48 | 18 |
| Four Knights Game: Spanish Variation, Spielmann Variation | C48 | 20 |
| Four Knights Game: Spanish Variation | C49 | 12 |
| Four Knights Game: Spanish Variation, Alatortsev Variation | C49 | 14 |
| Four Knights Game: Spanish Variation, Double Spanish | C49 | 8 |
| Four Knights Game: Spanish Variation, Double Spanish | C49 | 11 |
| Four Knights Game: Spanish Variation, Gunsberg Counterattack | C49 | 14 |
| Four Knights Game: Spanish Variation, Janowski Variation | C49 | 15 |
| Four Knights Game: Spanish Variation, Nimzowitsch Variation | C49 | 11 |
| Four Knights Game: Spanish Variation, Svenonius Variation | C49 | 14 |
| Four Knights Game: Spanish Variation, Symmetrical Variation | C49 | 12 |
| Four Knights Game: Spanish Variation, Symmetrical Variation | C49 | 20 |
| Four Knights Game: Spanish Variation, Symmetrical Variation | C49 | 14 |
| Four Knights Game: Spanish Variation, Symmetrical Variation | C49 | 13 |
| Four Knights Game: Spanish Variation, Symmetrical Variation, Blake Variation | C49 | 20 |
| Four Knights Game: Spanish Variation, Symmetrical Variation, Metger Unpin | C49 | 16 |
| Four Knights Game: Spanish Variation, Symmetrical Variation, Tarrasch Variation | C49 | 14 |
| Four Knights Game: Italian Variation | C50 | 8 |
| Italian Game | C50 | 5 |
| Italian Game: Anti-Fried Liver Defense | C50 | 6 |
| Italian Game: Blackburne-Kostić Gambit | C50 | 6 |
| Italian Game: Classical Variation, Albin Gambit | C50 | 9 |
| Italian Game: Deutz Gambit | C50 | 9 |
| Italian Game: Giuoco Pianissimo | C50 | 7 |
| Italian Game: Giuoco Pianissimo | C50 | 11 |
| Italian Game: Giuoco Pianissimo | C50 | 10 |
| Italian Game: Giuoco Pianissimo | C50 | 11 |
| Italian Game: Giuoco Pianissimo, Canal Variation | C50 | 11 |
| Italian Game: Giuoco Pianissimo, Dubois Variation | C50 | 10 |
| Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | C50 | 9 |
| Italian Game: Giuoco Pianissimo, Lucchini Gambit | C50 | 8 |
| Italian Game: Giuoco Pianissimo, Normal | C50 | 8 |
| Italian Game: Giuoco Piano | C50 | 6 |
| Italian Game: Hungarian Defense | C50 | 6 |
| Italian Game: Hungarian Defense, Tartakower Variation | C50 | 12 |
| Italian Game: Jerome Gambit | C50 | 7 |
| Italian Game: Paris Defense | C50 | 6 |
| Italian Game: Rosentreter Gambit | C50 | 7 |
| Italian Game: Rousseau Gambit | C50 | 6 |
| Italian Game: Evans Gambit | C51 | 7 |
| Italian Game: Evans Gambit | C51 | 18 |
| Italian Game: Evans Gambit Accepted | C51 | 8 |
| Italian Game: Evans Gambit Declined | C51 | 8 |
| Italian Game: Evans Gambit Declined | C51 | 9 |
| Italian Game: Evans Gambit Declined, Cordel Variation | C51 | 9 |
| Italian Game: Evans Gambit Declined, Hicken Variation | C51 | 17 |
| Italian Game: Evans Gambit Declined, Hirschbach Variation | C51 | 12 |
| Italian Game: Evans Gambit Declined, Lange Variation | C51 | 12 |
| Italian Game: Evans Gambit Declined, Pavlov Variation | C51 | 23 |
| Italian Game: Evans Gambit Declined, Showalter Variation | C51 | 11 |
| Italian Game: Evans Gambit Declined, Vasquez Variation | C51 | 15 |
| Italian Game: Evans Gambit, Anderssen Variation | C51 | 10 |
| Italian Game: Evans Gambit, Anderssen Variation, Cordel Line | C51 | 12 |
| Italian Game: Evans Gambit, Fontaine Countergambit | C51 | 8 |
| Italian Game: Evans Gambit, Fraser Attack | C51 | 19 |
| Italian Game: Evans Gambit, Fraser-Mortimer Attack | C51 | 25 |
| Italian Game: Evans Gambit, Göring Attack | C51 | 19 |
| Italian Game: Evans Gambit, Harding Variation | C51 | 15 |
| Italian Game: Evans Gambit, Hein Countergambit | C51 | 8 |
| Italian Game: Evans Gambit, Mayet Defense | C51 | 10 |
| Italian Game: Evans Gambit, McDonnell Defense | C51 | 10 |
| Italian Game: Evans Gambit, McDonnell Defense, Main Line | C51 | 16 |
| Italian Game: Evans Gambit, Morphy Attack | C51 | 17 |
| Italian Game: Evans Gambit, Mortimer-Evans Gambit | C51 | 26 |
| Italian Game: Evans Gambit, Paulsen Variation | C51 | 20 |
| Italian Game: Evans Gambit, Steinitz Variation | C51 | 21 |
| Italian Game: Evans Gambit, Stone-Ware Variation | C51 | 10 |
| Italian Game: Evans Gambit, Ulvestad Variation | C51 | 19 |
| Italian Game: Evans Gambit | C52 | 12 |
| Italian Game: Evans Gambit, Alapin-Steinitz Variation | C52 | 14 |
| Italian Game: Evans Gambit, Anderssen Defense | C52 | 14 |
| Italian Game: Evans Gambit, Bronstein Defense | C52 | 12 |
| Italian Game: Evans Gambit, Compromised Defense | C52 | 14 |
| Italian Game: Evans Gambit, Compromised Defense, Main Line | C52 | 21 |
| Italian Game: Evans Gambit, Compromised Defense, Potter Variation | C52 | 21 |
| Italian Game: Evans Gambit, Dufresne Defense | C52 | 14 |
| Italian Game: Evans Gambit, Johner Defense | C52 | 14 |
| Italian Game: Evans Gambit, Laroche Variation | C52 | 12 |
| Italian Game: Evans Gambit, Lasker Defense | C52 | 14 |
| Italian Game: Evans Gambit, Leonhardt Countergambit | C52 | 12 |
| Italian Game: Evans Gambit, Levenfish Variation | C52 | 21 |
| Italian Game: Evans Gambit, Main Line | C52 | 10 |
| Italian Game: Evans Gambit, Mieses Defense | C52 | 14 |
| Italian Game: Evans Gambit, Pierce Defense | C52 | 12 |
| Italian Game: Evans Gambit, Richardson Attack | C52 | 15 |
| Italian Game: Evans Gambit, Sanders-Alapin Variation | C52 | 14 |
| Italian Game: Evans Gambit, Slow Variation | C52 | 11 |
| Italian Game: Evans Gambit, Sokolsky Variation | C52 | 13 |
| Italian Game: Evans Gambit, Tartakower Attack | C52 | 13 |
| Italian Game: Evans Gambit, Waller Attack | C52 | 15 |
Family pages group related lines: the family head with a diagram, main continuations and every catalogued variation.