| Name | ECO | Main line length |
| Ruy Lopez | C60 | 5 plies |
| Ruy Lopez: Nürnberg Variation | C60 | 6 plies |
| Ruy Lopez: Brentano Gambit | C60 | 6 plies |
| Ruy Lopez: Bulgarian Variation | C60 | 6 plies |
| Ruy Lopez: Spanish Countergambit | C60 | 6 plies |
| Ruy Lopez: Fianchetto Defense | C60 | 6 plies |
| Ruy Lopez: Rotary-Albany Gambit | C60 | 6 plies |
| Ruy Lopez: Steinitz Defense | C62 | 6 plies |
| Ruy Lopez: Schliemann Defense | C63 | 6 plies |
| Ruy Lopez: Morphy Defense | C70 | 6 plies |
| Ruy Lopez: Lucena Variation | C60 | 6 plies |
| Ruy Lopez: Pollock Defense | C60 | 6 plies |
| Ruy Lopez: Retreat Variation | C60 | 6 plies |
| Ruy Lopez: Vinogradov Variation | C60 | 6 plies |
| Ruy Lopez: Alapin Defense | C60 | 6 plies |
| Ruy Lopez: Bird Variation | C61 | 6 plies |
| Ruy Lopez: Classical Variation | C64 | 6 plies |
| Ruy Lopez: Berlin Defense | C65 | 6 plies |
| Ruy Lopez: Cozio Defense | C60 | 6 plies |
| Ruy Lopez: Steinitz Defense | C62 | 7 plies |
| Ruy Lopez: Schliemann Defense, Schönemann Attack | C63 | 7 plies |
| Ruy Lopez: Schliemann Defense, Dyckhoff Variation | C63 | 7 plies |
| Ruy Lopez: Classical Variation, Spanish Wing Gambit | C64 | 7 plies |
| Ruy Lopez: Classical Variation, Central Variation | C64 | 7 plies |
| Ruy Lopez: Berlin Defense, Anti-Berlin Variation | C65 | 7 plies |
| Ruy Lopez: Schliemann Defense, Exchange Variation | C63 | 7 plies |
| Ruy Lopez: Schliemann Defense, Jaenisch Gambit Accepted | C63 | 7 plies |
| Ruy Lopez: Berlin Defense | C65 | 7 plies |
| Ruy Lopez: Exchange Variation | C68 | 7 plies |
| Ruy Lopez: Fianchetto Defense, Kevitz Gambit | C60 | 8 plies |
| Ruy Lopez: Halloween Attack | C65 | 7 plies |
| Ruy Lopez: Classical Variation, Konikowski Gambit | C64 | 8 plies |
| Ruy Lopez: Classical Variation, Cordel Gambit | C64 | 8 plies |
| Ruy Lopez: Morphy Defense, Schliemann Defense Deferred | C70 | 8 plies |
| Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred | C70 | 8 plies |
| Ruy Lopez: Morphy Defense, Caro Variation | C70 | 8 plies |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense | C71 | 8 plies |
| Ruy Lopez: Classical Variation, Charousek Variation | C64 | 8 plies |
| Ruy Lopez: Classical Defense, Boden Variation | C64 | 8 plies |
| Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Mortimer Variation | C65 | 8 plies |
| Ruy Lopez: Berlin Defense, Improved Steinitz Defense | C66 | 8 plies |
| Ruy Lopez: Morphy Defense, Classical Defense Deferred | C70 | 8 plies |
| Ruy Lopez: Bird's Defense Deferred | C70 | 8 plies |
| Ruy Lopez: Morphy Defense, Alapin's Defense Deferred | C70 | 8 plies |
| Ruy Lopez: Cozio Defense, Paulsen Variation | C60 | 8 plies |
| Ruy Lopez: Berlin Defense, Fishing Pole Variation | C65 | 8 plies |
| Ruy Lopez: Berlin Defense, Beverwijk Variation | C65 | 8 plies |
| Ruy Lopez: Morphy Defense, Cozio Defense | C70 | 8 plies |
| Ruy Lopez: Berlin Defense, Rio Gambit Accepted | C67 | 8 plies |
| Ruy Lopez: Exchange Variation, Lutikov Variation | C68 | 8 plies |
| Ruy Lopez: Steinitz Defense, Semi-Duras Variation | C62 | 9 plies |
| Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Duras Variation | C65 | 9 plies |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense | C71 | 9 plies |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense | C74 | 9 plies |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense | C71 | 9 plies |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense | C72 | 9 plies |
| Ruy Lopez: Morphy Defense, Anderssen Variation | C77 | 9 plies |
| Ruy Lopez: Morphy Defense, Jaffe Gambit | C77 | 9 plies |
| Ruy Lopez: Morphy Defense, Mackenzie Variation | C77 | 9 plies |
| Ruy Lopez: Steinitz Defense, Center Gambit | C62 | 9 plies |
| Ruy Lopez: Classical Defense, Zaitsev Variation | C64 | 9 plies |
| Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Kaufmann Variation | C65 | 9 plies |
| Ruy Lopez: Classical Variation, Zukertort Gambit | C65 | 9 plies |
| Ruy Lopez: Morphy Defense, Schliemann Defense Deferred, Jaenisch Gambit Deferred | C70 | 9 plies |
| Ruy Lopez: Morphy Defense, Wormald Attack | C77 | 9 plies |
| Ruy Lopez: Morphy Defense, Tarrasch Variation | C77 | 9 plies |
| Ruy Lopez: Morphy Defense | C78 | 9 plies |
| Ruy Lopez: Spanish Countergambit, Harding Countergambit, Fricke Gambit | C60 | 9 plies |
| Ruy Lopez: Berlin Defense, Nyholm Attack | C65 | 9 plies |
| Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Anderssen Variation | C65 | 9 plies |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Siesta Variation | C74 | 10 plies |
| Ruy Lopez: Morphy Defense, Bayreuth Variation | C77 | 9 plies |
| Ruy Lopez: Spanish Countergambit, Harding Gambit | C60 | 9 plies |
| Ruy Lopez: Exchange Variation, Keres Variation | C68 | 9 plies |
| Ruy Lopez: Exchange Variation, Normal Variation | C69 | 9 plies |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense | C75 | 10 plies |
| Ruy Lopez: Closed Berlin Defense, Chigorin Variation | C66 | 10 plies |
| Ruy Lopez: Morphy Defense, Graz Variation | C70 | 10 plies |
| Ruy Lopez: Morphy Defense, Norwegian Variation | C70 | 10 plies |
| Ruy Lopez: Central Countergambit | C78 | 10 plies |
| Ruy Lopez: Brix Variation | C78 | 10 plies |
| Ruy Lopez: Morphy Defense, Steinitz Deferred | C79 | 10 plies |
| Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Mortimer Trap | C65 | 10 plies |
| Ruy Lopez: Berlin Defense, Rosenthal Variation | C67 | 10 plies |
| Ruy Lopez: Morphy Defense, Møller Variation | C78 | 10 plies |
| Ruy Lopez: Closed | C84 | 10 plies |
| Ruy Lopez: Berlin Defense, l'Hermet Variation | C67 | 10 plies |
| Ruy Lopez: Berlin Defense, Rio de Janeiro Variation | C67 | 10 plies |
| Ruy Lopez: Exchange Variation, Gligoric Variation | C69 | 10 plies |
| Ruy Lopez: Open | C80 | 10 plies |
| Ruy Lopez: Alapin Defense, Alapin Gambit | C60 | 10 plies |
| Ruy Lopez: Schliemann Defense, Kostić Defense | C63 | 10 plies |
| Ruy Lopez: Schliemann Defense, Tartakower Variation | C63 | 10 plies |
| Ruy Lopez: Exchange Variation, King's Bishop Variation | C69 | 10 plies |
| Ruy Lopez: Exchange Variation, Bronstein Variation | C69 | 10 plies |
| Ruy Lopez: Bird Variation, Paulsen Variation | C61 | 10 plies |
| Ruy Lopez: Morphy Defense, Duras Variation | C77 | 11 plies |
| Ruy Lopez: Closed, Center Attack | C84 | 11 plies |
| Ruy Lopez: Closed, Martinez Variation | C84 | 11 plies |
| Ruy Lopez: Steinitz Defense, Nimzowitsch Attack | C62 | 11 plies |
| Ruy Lopez: Exchange Variation, Romanovsky Variation | C68 | 11 plies |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Fianchetto Variation | C76 | 12 plies |
| Ruy Lopez: Open | C80 | 11 plies |
| Ruy Lopez: Closed, Morphy Attack | C84 | 11 plies |
| Ruy Lopez: Closed, Worrall Attack | C86 | 11 plies |
| Ruy Lopez: Open Berlin Defense, Showalter Variation | C67 | 11 plies |
| Ruy Lopez: Morphy Defense, Norwegian Variation, Nightingale Gambit | C70 | 11 plies |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense | C73 | 11 plies |
| Ruy Lopez: Morphy Defense, Tartakower Variation | C80 | 11 plies |
| Ruy Lopez: Open, Knorre Variation | C80 | 11 plies |
| Ruy Lopez: Closed, Delayed Exchange | C85 | 11 plies |
| Ruy Lopez: Open Berlin Defense, l'Hermet Variation | C67 | 11 plies |
| Ruy Lopez: Berlin Defense, Minckwitz Variation | C67 | 11 plies |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense | C75 | 12 plies |
| Ruy Lopez: Morphy Defense | C78 | 12 plies |
| Ruy Lopez: Classical Defense, Benelux Variation | C64 | 12 plies |
| Ruy Lopez: Berlin Defense, Hedgehog Variation | C66 | 12 plies |
| Ruy Lopez: Morphy Defense, Neo-Arkhangelsk Variation | C78 | 12 plies |
| Ruy Lopez: Morphy Defense, Arkhangelsk Variation | C78 | 12 plies |
| Ruy Lopez: Closed, Averbakh Variation | C87 | 12 plies |
| Ruy Lopez: Berlin Defense, Closed Wolf Variation | C66 | 12 plies |
| Ruy Lopez: Berlin Defense, Trifunovic Variation | C67 | 12 plies |
| Ruy Lopez: Exchange Variation, Alapin Gambit | C69 | 12 plies |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense | C73 | 12 plies |
| Ruy Lopez: Open, Skipworth Gambit | C80 | 12 plies |
| Ruy Lopez: Open, Riga Variation | C80 | 12 plies |
| Ruy Lopez: Morphy Defense, Wing Attack | C78 | 13 plies |
| Ruy Lopez: Open, Richter Variation | C80 | 13 plies |
| Ruy Lopez: Classical Variation, Modern Main Line | C64 | 13 plies |
| Ruy Lopez: Berlin Defense, Closed Bernstein Variation | C66 | 13 plies |
| Ruy Lopez: Morphy Defense, Modern Steinitz Defense | C74 | 13 plies |
| Ruy Lopez: Open | C80 | 13 plies |
| Ruy Lopez: Closed | C88 | 13 plies |
| Ruy Lopez: Berlin Defense, Closed Showalter Variation | C66 | 13 plies |
| Ruy Lopez: Open, Friess Attack | C80 | 13 plies |
| Ruy Lopez: Closed, Worrall Attack, Delayed Castling Line | C86 | 14 plies |
| Ruy Lopez: Berlin Defense, Tarrasch Trap | C66 | 14 plies |
| Ruy Lopez: Closed, Worrall Attack, Castling Line | C86 | 14 plies |
| Ruy Lopez: Closed | C88 | 14 plies |
| Ruy Lopez: Closed, Trajkovic Counterattack | C88 | 14 plies |
| Ruy Lopez: Steinitz Defense Deferred, Lipnitsky Variation | C79 | 14 plies |
| Ruy Lopez: Morphy Defense, Steinitz Deferred | C79 | 14 plies |
| Ruy Lopez: Schliemann Defense, Möhring Variation | C63 | 14 plies |
| Ruy Lopez: Schliemann Defense, Classical Variation | C63 | 14 plies |
| Ruy Lopez: Berlin Defense, l'Hermet Variation, Westerinen Line | C67 | 14 plies |
| Ruy Lopez: Open, Harksen Gambit | C80 | 15 plies |
| Ruy Lopez: Closed, Rosen Attack | C88 | 15 plies |
| Ruy Lopez: Exchange Variation, Alekhine Variation | C68 | 14 plies |
| Ruy Lopez: Exchange, Alekhine Variation | C68 | 14 plies |
| Ruy Lopez: Closed, Basque Gambit | C84 | 15 plies |
| Ruy Lopez: Closed, Anti-Marshall | C88 | 15 plies |
| Ruy Lopez: Open | C80 | 15 plies |
| Ruy Lopez: Wormald Attack, Grünfeld Variation | C77 | 16 plies |
| Ruy Lopez: Marshall Attack | C89 | 16 plies |
| Ruy Lopez: Closed | C90 | 16 plies |
| Ruy Lopez: Open, Schlechter Defense | C80 | 16 plies |
| Ruy Lopez: Open, Main Line | C80 | 16 plies |
| Ruy Lopez: Open, Zukertort Variation | C80 | 16 plies |
| Ruy Lopez: Closed, Center Attack, Basque Gambit | C84 | 16 plies |
| Ruy Lopez: Noah's Ark Trap | C71 | 16 plies |
| Ruy Lopez: Cozio Defense, Tartakower Gambit | C60 | 16 plies |
| Ruy Lopez: Closed, Worrall Attack, Castling Line | C86 | 17 plies |
| Ruy Lopez: Closed, Pilnik Variation | C90 | 17 plies |
| Ruy Lopez: Closed, Suetin Variation | C90 | 17 plies |
| Ruy Lopez: Closed, Yates Variation | C91 | 17 plies |
| Ruy Lopez: Closed | C92 | 17 plies |
| Ruy Lopez: Berlin Defense, Cordel Variation | C67 | 16 plies |
| Ruy Lopez: Closed, Lutikov Variation | C90 | 17 plies |
| Ruy Lopez: Open | C82 | 17 plies |
| Ruy Lopez: Open, Howell Attack | C81 | 17 plies |
| Ruy Lopez: Closed, Smyslov Defense | C93 | 18 plies |
| Ruy Lopez: Berlin Defense, l'Hermet Variation, Berlin Wall Defense | C67 | 16 plies |
| Ruy Lopez: Open, Bernstein Variation | C80 | 17 plies |
| Ruy Lopez: Closed, Bogoljubow Variation | C91 | 18 plies |
| Ruy Lopez: Closed, Zaitsev System | C92 | 18 plies |
| Ruy Lopez: Closed, Kholmov Variation | C92 | 18 plies |
| Ruy Lopez: Closed, Karpov Variation | C92 | 18 plies |
| Ruy Lopez: Closed, Flohr System | C92 | 18 plies |
| Ruy Lopez: Closed, Breyer Defense | C94 | 18 plies |
| Ruy Lopez: Closed, Chigorin Defense | C97 | 18 plies |
| Ruy Lopez: Marshall Attack, Steiner Variation | C89 | 18 plies |
| Ruy Lopez: Closed, Kecskemet Variation | C72 | 18 plies |
| Ruy Lopez: Open, Italian Variation | C82 | 18 plies |
| Ruy Lopez: Open, Berlin Variation | C82 | 18 plies |
| Ruy Lopez: Open, Classical Defense | C83 | 18 plies |
| Ruy Lopez: Berlin Defense, Zukertort Variation | C67 | 17 plies |
| Ruy Lopez: Berlin Defense, Pillsbury Variation | C67 | 17 plies |
| Ruy Lopez: Berlin Defense, Winawer Attack | C67 | 17 plies |
| Ruy Lopez: Closed, Yates Variation, Short Attack | C91 | 19 plies |
| Ruy Lopez: Closed, Breyer Defense, Quiet Variation | C94 | 19 plies |
| Ruy Lopez: Closed, Breyer | C95 | 19 plies |
| Ruy Lopez: Closed, Chigorin Defense | C96 | 19 plies |
| Ruy Lopez: Open, Howell Attack | C81 | 19 plies |
| Ruy Lopez: Open, Motzko Attack | C82 | 19 plies |
| Ruy Lopez: Open, Classical Defense, Main Line | C83 | 19 plies |
| Ruy Lopez: Berlin Defense, Berlin Wall | C67 | 18 plies |
| Ruy Lopez: Open, St. Petersburg Variation | C82 | 19 plies |
| Ruy Lopez: Closed, Chigorin Defense, Gajewski Gambit | C96 | 20 plies |
| Ruy Lopez: Closed, Chigorin Defense | C96 | 20 plies |
| Ruy Lopez: Open, Bernstein Variation, Luther Line | C80 | 19 plies |
| Ruy Lopez: Open, Berger Variation | C80 | 19 plies |
| Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid | C95 | 20 plies |
| Ruy Lopez: Steinitz Defense Deferred, Boleslavsky Variation | C79 | 19 plies |
| Ruy Lopez: Open, Motzko Attack, Nenarokov Variation | C82 | 20 plies |
| Ruy Lopez: Marshall Attack | C89 | 20 plies |
| Ruy Lopez: Open, Classical Defense | C83 | 20 plies |
| Ruy Lopez: Rabinovich Variation | C78 | 20 plies |
| Ruy Lopez: Noah's Ark Trap | C88 | 20 plies |
| Ruy Lopez: Closed, Balla Variation | C88 | 21 plies |
| Ruy Lopez: Closed, Breyer Defense | C95 | 21 plies |
| Ruy Lopez: Open, Karpov Gambit | C80 | 21 plies |
| Ruy Lopez: Closed, Borisenko Variation | C96 | 22 plies |
| Ruy Lopez: Closed, Rossolimo Defense | C96 | 22 plies |
| Ruy Lopez: Closed, Keres Defense | C96 | 22 plies |
| Ruy Lopez: Closed, Chigorin Defense | C97 | 22 plies |
| Ruy Lopez: Open, Malkin Variation | C83 | 21 plies |
| Ruy Lopez: Open, Breslau Variation | C83 | 22 plies |
| Ruy Lopez: Open, Dilworth Variation | C82 | 22 plies |
| Ruy Lopez: Marshall Attack, Modern Variation | C89 | 22 plies |
| Ruy Lopez: Marshall Attack, Original Marshall Attack | C89 | 22 plies |
| Ruy Lopez: Closed, Smyslov-Breyer-Zaitsev Hybrid | C92 | 24 plies |
| Ruy Lopez: Closed, Chigorin Defense | C98 | 24 plies |
| Ruy Lopez: Marshall Attack, Main Line | C89 | 23 plies |
| Ruy Lopez: Closed, Breyer Defense | C95 | 24 plies |
| Ruy Lopez: Open, Howell Attack, Ekstrom Variation | C81 | 24 plies |
| Ruy Lopez: Closed, Chigorin Defense | C98 | 25 plies |
| Ruy Lopez: Closed, Leonhardt Variation | C88 | 26 plies |
| Ruy Lopez: Closed, Chigorin Defense, Panov System | C99 | 25 plies |
| Ruy Lopez: Open, Tarrasch Trap | C83 | 25 plies |
| Ruy Lopez: Berlin Defense, Rio de Janeiro Variation | C67 | 26 plies |
| Ruy Lopez: Closed, Alekhine Gambit | C88 | 27 plies |
| Ruy Lopez: Closed, Chigorin, Yugoslav System | C97 | 28 plies |
| Ruy Lopez: Marshall Attack, Re3 Variation | C89 | 27 plies |
| Ruy Lopez: Marshall Attack, Modern Main Line | C89 | 28 plies |
| Ruy Lopez: Marshall Attack, Main Line, Spassky Variation | C89 | 36 plies |