Openings

Variation
Sicilian
    Accelerated Fianchetto, Modern Variation Accelerated Fianchetto, Exchange Variation Sveshnikov Variation Pelikan, Chelyabinsk Variation Pelikan, Bird Variation Pelikan (Lasker/Sveshnikov) Variation Labourdonnais-Loewenthal (Kalashnikov) Variation Labourdonnais-Loewenthal Variation Nimzovich Variation Flohr Variation Nimzovich-Rossolimo attack, Gurgenidze Variation Nimzovich-Rossolimo attack (with ...g6, without ...d6) Nimzovich-Rossolimo attack (without ...d6) Nimzovich-Rubinstein; Rubinstein counter-gambit Nimzovich-Rubinstein Variation O'Kelly Variation Acton extension Hungarian Variation Katalimov Variation Quinteros Variation Stiletto (Althouse) Variation
    Three knights
      Steinitz, Rosenthal Variation Steinitz Variation Winawer defense (Gothic defense) Schlechter Variation
      Two knights
        Max Lange attack, Krause Variation Max Lange attack, Steinitz Variation Max Lange attack, Schlechter Variation Max Lange attack, Loman defense Max Lange attack, Rubinstein Variation Max Lange attack, Marshall Variation Max Lange attack, Berger Variation Max Lange attack
        Two knights defense
          Steinitz Variation Goering Variation Knorre Variation Blackburne Variation Colman Variation Paoli Variation Bogolyubov Variation Maroczy Variation Yankovich Variation Kieseritsky Variation Fegatello attack, Polerio defense Fegatello attack, Leonhardt Variation Fegatello attack Pincus Variation Lolli attack Fritz, Gruber Variation Fritz Variation Ulvestad Variation Wilkes Barre (Traxler) Variation Canal Variation Yurdansky attack
          Vienna
            Alekhine Variation Adams' gambit `Frankenstein-Dracula' Variation Paulsen-Mieses Variation Mengarini Variation Falkbeer Variation Pierce gambit, Rushmere attack Pierce gambit Hamppe-Muzio, Dubois Variation Hamppe-Muzio gambit Hamppe-Allgaier gambit, Alapin Variation Hamppe-Allgaier gambit Steinitz gambit, Fraser-Minckwitz Variation Steinitz gambit, Zukertort defense Steinitz gambit Fyfe gambit Paulsen Variation Zhuravlev countergambit
            Vienna gambit
              Heyde Variation Bardeleben Variation Paulsen attack Breyer Variation Kaufmann Variation