Openings

Variation
Ruy Lopez
    Trajkovic counter-attack Noah's ark trap Closed, 7...d6, 8.d4 Closed, Balla Variation Closed, Leonhardt Variation Closed Closed, Averbach Variation Worrall attack, solid line Worrall attack, sharp line Worrall attack Exchange Variation doubly deferred (DERLD)
    Scandinavian
      Richter Variation Kiel Variation Marshall Variation Icelandic gambit Pytel-Wade Variation Anderssen counter-attack, Collijn Variation Anderssen counter-attack, Goteborg system Anderssen counter-attack Orthodox attack Anderssen counter-attack
      Scotch
        Romanishin Variation Potter Variation Blumenfeld attack Meitner Variation Paulsen, Gunsberg defense Paulsen attack Gottschall Variation Blackburne attack Tartakower Variation Mieses Variation Schmidt Variation Steinitz Variation Fraser attack Rosenthal Variation Berger Variation Horwitz attack Pulling counter-attack Ghulam Kassim Variation Goering gambit, Bardeleben Variation Goering gambit Sea-cadet mate Relfsson gambit ('MacLopez') Cochrane Variation Lolli Variation
        Scotch gambit
          Dubois-Reti defense Benima defense Cochrane Variation Hanneken Variation Vitzhum attack Cochrane-Shumov defense Anderssen (Paulsen, Suhle) counter-attack
          Sicilian
            Closed, 6.Be3 Closed, 6.f4 e5 (Botvinnik) Closed, 6.f4 Closed, 6.Ne2 e5 (Botvinnik) Closed Closed, Smyslov Variation Grand Prix attack, Schofman Variation Grand Prix attack chameleon Variation Closed, 2...Nc6 Closed, Korchnoi Variation 2.c3, Heidenfeld Variation Alapin's Variation (2.c3) Smith-Morra gambit, Chicago defense Smith-Morra gambit Andreaschek gambit Keres Variation (2.Ne2) wing gambit, Carlsbad Variation wing gambit, Marienbad Variation wing gambit, Marshall Variation wing gambit, Santasiere Variation wing gambit Steinitz Variation Gloria Variation Najdorf, 7...Be7 Main line Najdorf Variation Najdorf, Goteborg (Argentine) Variation Najdorf, Browne Variation Najdorf, 7...Be7 Najdorf, Poisoned pawn Variation Najdorf, 7...Qb6 Najdorf, Polugayevsky, Simagin Variation Najdorf, Polugayevsky Variation Najdorf, 7.f4 Najdorf, 6...e6 Najdorf, Ivkov Variation Najdorf, 6.Bg5 Najdorf, 6.f4 Najdorf, Opovcensky Variation Najdorf, Zagreb (Fianchetto) Variation Najdorf, Byrne (English) attack Najdorf, Lipnitzky attack Najdorf, Adams attack Najdorf Velimirovic attack Sozin, 7.Be3 Sozin, Fischer Variation Sozin, Leonhardt Variation Sozin with ...a6 and ...b5