Openings

White Variation
QGD
    Albin counter-gambit, Krenosz Variation Albin counter-gambit, Alapin Variation Albin counter-gambit Albin counter-gambit, Lasker trap Chigorin defense, Janowski Variation Chigorin defense Symmetrical (Austrian) defense Marshall defense Grau (Sahovic) defense
    QGD Semi-Slav
      Meran, Rellstab attack Meran, Sozin Variation Meran, Stahlberg Variation Meran, Rabinovich Variation Meran, Blumenfeld Variation Meran, Old Main line Meran, ReynOlds' Variation Meran Meran, Pirc Variation Meran, 8...a6 Meran, Wade Variation neo-Meran (Lundin Variation ) Meran Variation 7.Bc4 Chigorin defense Romih Variation Bogolyubov Variation 6.Bd3 Rubinstein (anti-Meran) system Stoltz Variation 5...Nd7 Accelerated Meran (Alekhine Variation ) Stonewall defense 5.e3 Anti-Meran, Alatortsev system Anti-Meran, Szabo Variation Anti-Meran, Lilienthal Variation Anti-Meran gambit Ekstrom Variation Botvinnik system (anti-Meran) 5.Bg5 dc Hastings Variation
      QGD Slav
        Semmering Variation Dutch, Saemisch Variation Dutch Variation , Main line Dutch Variation Dutch, Lasker Variation Wiesbaden Variation Carlsbad Variation Krause attack Czech defense Steiner Variation Soultanbeieff Variation Smyslov Variation Tolush-Geller gambit Slav gambit 5.e3 (Alekhine Variation ) Schlechter Variation Suechting Variation 4.Nc3 Exchange, Trifunovic Variation Exchange Variation , 6.Bf4 Bf5 Exchange Variation Amsterdam Variation Landau Variation 4.e3 Bf5 4.e3 Breyer Variation 3.Nf3 Winawer counter-gambit
        QGD Slav accepted
          Alapin Variation
          QGD Slav defense
            Exchange Variation
            QP counter-gambit
              Maroczy gambit
              Queen's Indian
                Marienbad system, Berg Variation Marienbad system Old Main line, 9.Qxc3 Old Main line, 7.Nc3 Euwe Variation Old Main line, 6.O-O Opovcensky Variation Anti-Queen's Indian system 5.Bg2 Be7 Riumin Variation Yates Variation Capablanca Variation Buerger Variation Rubinstein Variation 4.g3 Bb7 Nimzovich Variation (exaggerated Fianchetto) 4.g3 Averbakh Variation 4.e3 4.Nc3, Main line 4.Nc3, Botvinnik Variation 4.Nc3 Petrosian system Miles Variation
                Queen's pawn
                  Mengarini attack Yusupov-Rubinstein system Torre attack, Wagner gambit Torre attack Bronstein gambit Franco-Indian (Keres) defense Keres defense English defense Englund gambit Charlick (Englund) gambit Lundin (Kevitz-Mikenas) defense Anti-Veresov Chigorin Variation Stonewall attack
                  Reti
                    Advance Variation King's Indian attack, French Variation King's Indian attack King's Indian attack (with ...c5) King's Indian attack, Pachman system King's Indian attack, Keres Variation King's Indian attack, Yugoslav Variation King's Indian attack (Barcza system) Nimzovich-Larsen attack Old Indian attack King's Indian attack, Reti-Smyslov Variation King's Indian attack, Spassky's Variation Herrstroem gambit Wade defense Lisitsin gambit deferred Pirc-Lisitsin gambit
                    Reti accepted
                      Keres Variation
                      Robatsch defense
                        Rossolimo Variation Geller's system Pseudo-Austrian attack Two knights, Suttles Variation Two knights Variation Gurgenidze Variation Three pawns attack
                        Ruy Lopez
                          Closed, Rossolimo defense Closed (8...Na5) Closed, Breyer, Simagin Variation Closed, Breyer, Gligoric Variation Closed, Breyer, Borisenko Variation Closed, Breyer, 10.d4 Closed, Breyer defense Closed, Smyslov defense Closed, Flohr-Zaitsev system (Lenzerheide Variation ) Closed, Ragozin-Petrosian (`Keres') Variation Closed, Kholmov Variation Closed, Keres (9...a5) Variation Closed, 9.h3 Closed, Bogolyubov Variation Closed, 9.d4 Closed, Suetin Variation Closed, Lutikov Variation Closed, Pilnik Variation Closed (with ...d6) Marshall, Herman Steiner Variation Marshall, Main line, Spassky Variation Marshall, Main line, 14...Qh3 Marshall, Main line, 12.d2d4 Marshall, Kevitz Variation Marshall counter-attack, 11...c6 Marshall counter-attack Closed, 8.c3 Closed, anti-Marshall 8.a4 Closed, 7...O-O 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) Closed, Basque gambit (North Spanish Variation ) Closed, center attack Closed defense Open, Breslau Variation Open, Tarrasch trap Open, 9...Be7, 10.Re1 Open, Malkin Variation Open, Classical defense Open, Motzko attack, Nenarokov Variation Open, Motzko attack Open, Dilworth Variation Open, St. Petersburg Variation Open, Italian Variation Open, Berlin Variation Open, 9.c3 Open, Howell attack, Adam Variation Open, Howell attack, Ekstroem Variation Open, Howell attack Open, Bernstein Variation , Karpov gambit Open, Bernstein Variation Open, 8...Be6 Open, Zukertort Variation Open, 8.de Open, Harksen gambit Open, Berger Variation Open, Schlechter defense Open, 7.Bb3 Open, Richter Variation Open, Friess attack Open, 6.d4 b5 Open, Riga Variation Open, 6.d4 Open, Knorre Variation Open, Tartakower Variation Open (Tarrasch) defense Steinitz defense deferred, Boleslavsky Variation Steinitz defense deferred, Rubinstein Variation Steinitz defense deferred, Lipnitsky Variation Steinitz defense deferred (Russian defense) Moeller defense Archangelsk (counterthrust) Variation Rabinovich Variation ...b5 & ...d6 Wing attack 5.O-O Morphy defense, Duras Variation Anderssen Variation Wormald attack, Gruenfeld Variation Wormald (Alapin) attack Treybal (Bayreuth) Variation (Exchange var. deferred) Four knights (Tarrasch Variation Morphy defense Modern Steinitz defense, Fianchetto (Bronstein) Variation Modern Steinitz defense, Rubinstein Variation Modern Steinitz defense Siesta, Kopayev Variation Modern Steinitz defense, siesta Variation Modern Steinitz defense, Alapin Variation Modern Steinitz defense, Richter Variation Modern Steinitz defense, 5.O-O Modern Steinitz defense, Duras (Keres) Variation Modern Steinitz defense, Three knights Variation Schliemann defense deferred Taimanov (chase/wing/Accelerated counterthrust) Variation Graz Variation Caro Variation Classical defense deferred Alapin's defense deferred Bird's defense deferred Cozio defense deferred Fianchetto defense deferred Exchange, Bronstein Variation Exchange, Gligoric Variation Exchange Variation , Alapin gambit Exchange Variation , 5.O-O Exchange, Romanovsky Variation Exchange, Keres Variation Exchange, Alekhine Variation Exchange Variation Berlin defense, Rosenthal Variation Berlin defense, Minckwitz Variation Berlin defense, Trifunovic Variation Berlin defense, Cordel Variation Berlin defense, Winawer attack Berlin defense, Pillsbury Variation Berlin defense, Zukertort Variation Berlin defense, Rio de Janeiro Variation Open Berlin defense, 5...Be7 Open Berlin defense, Showalter Variation Open Berlin defense, l'Hermet Variation Berlin defense, Open Variation Closed Berlin defense, Chigorin Variation Closed Berlin defense, Wolf Variation Closed Berlin defense, Showalter Variation Closed Berlin defense, Bernstein Variation Berlin defense, Tarrasch trap Berlin defense, hedgehog Variation Berlin defense, 4.O-O, d6 Berlin defense, Beverwijk Variation Berlin defense, 4.O-O Berlin defense, Kaufmann Variation Berlin defense, Duras Variation Berlin defense, Anderssen Variation Berlin defense, Mortimer trap Berlin defense, Mortimer Variation Berlin defense, Nyholm attack Berlin defense Cordel gambit Classical defense, Boden Variation Classical defense, Charousek Variation Classical defense, Benelux Variation Classical defense, 4.c3 Classical defense, Zaitsev Variation Classical (Cordel) defense Schliemann defense, Berger Variation Schliemann defense Old Steinitz defense, Semi-Duras Variation Old Steinitz defense, Nimzovich attack Old Steinitz defense Bird's defense, Paulsen Variation Bird's defense Cozio defense, Paulsen Variation Cozio defense Fianchetto (Smyslov/Barnes) defense Brentano defense Vinogradov Variation Lucena defense Pollock defense Nuernberg Variation Closed, Chigorin, 12...c5d4 Closed, Chigorin, Rauzer attack Closed, Chigorin, 12...Nc6 Closed, Chigorin, Yugoslav system Closed, Chigorin defense Closed, Keres (...Nd7) defense Closed, Borisenko defense Closed (10...c5)
                          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
                                  Scheveningen, Keres attack Scheveningen, Fianchetto Variation Scheveningen, Vitolins Variation Scheveningen, English Variation Scheveningen Variation Dragon, Yugoslav attack, 12.h4 Dragon, Yugoslav attack, 10.O-O-O Dragon, Yugoslav attack, 9...Bd7 Dragon, Yugoslav attack, Byrne Variation Dragon, Yugoslav attack, 9.Bc4 Dragon, Yugoslav attack, Rauser Variation Dragon, Yugoslav attack, 7...O-O Dragon, Yugoslav attack Dragon, Classical, Alekhine Variation Dragon, Classical, Reti-Tartakower Variation Dragon, Classical, Bernard defense Dragon, Classical, Spielmann Variation Dragon, Classical, Stockholm attack Dragon, Classical, 9.Nb3 Dragon, Classical, Richter Variation Dragon, Classical, Zollner gambit Dragon, Classical, 8.O-O Dragon, Classical, Nottingham Variation Dragon, Classical, Grigoriev Variation Dragon, Classical, Amsterdam Variation Dragon, Classical attack Dragon, 6.Be3 Dragon, Levenfish; Flohr Variation Dragon, Levenfish Variation Dragon Variation Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf6 Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7 Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd7 Richter-Rauzer, Rauzer attack, 7...a6 Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4 Richter-Rauzer, Rauzer attack, Geller Variation Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f4 Richter-Rauzer, Rauzer attack, 7...Be7 Richter-Rauzer, Rauzer attack Richter-Rauzer, Keres Variation Richter-Rauzer, Richter attack Richter-Rauzer, Margate (Alekhine) Variation Richter-Rauzer, Podvebrady Variation Richter-Rauzer, 6...e6 Richter-Rauzer, Larsen Variation , 7.Qd2 Richter-Rauzer, Larsen Variation Richter-Rauzer, Bondarevsky Variation Richter-Rauzer Boleslavsky Variation , 7.Nb3 Boleslavsky, Louma Variation Boleslavsky Variation Classical Sozin, Benko Variation Magnus Smith trap Sozin, not Scheveningen Venice attack Prins Variation , Venice attack Prins (Moscow) Variation Chekhover, Zaitsev Variation Canal-Sokolsky attack, Sokolsky Variation Canal-Sokolsky attack, Bronstein gambit Canal-Sokolsky attack, 3...Bd7 Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack wing gambit deferred Taimanov Variation Taimanov (Bastrikov) Variation Taimanov, American attack Kan, 5.Nc3 Kan, Swiss cheese Variation Kan, Polugaievsky Variation Kan, Gipslis Variation Kan, 5.Bd3 Kan, Maroczy bind - Bronstein Variation Kan, Maroczy bind (Reti Variation ) Kan Variation Pin, Koch Variation Pin, Jaffe Variation Pin Variation (Sicilian counter-attack) Anderssen Variation Marshall Variation Accelerated Fianchetto, Breyer Variation Accelerated Fianchetto, Maroczy bind, 6.Be3 Accelerated Fianchetto, Simagin Variation Accelerated Fianchetto, Maroczy bind, 5...Bg7 Accelerated Fianchetto, Gurgenidze Variation Accelerated Fianchetto, Maroczy bind Accelerated Fianchetto, Modern Variation with Bc4 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 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