Abonyi Variation of the Budapest Gambit 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.f4 Nec6 (István Abonyi)
Adams Attack of the Sicilian Defence 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.h3 (Weaver W. Adams)
Adler Variation of the Budapest Gambit 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Nf3 (Adler)
Alapin's Opening 1.e4 e5 2.Ne2 (Semyon Alapin)
Alapin Variation of the Sicilian Defence 1.e4 c5 2.c3 (Semyon Alapin)
Albin Countergambit 1.d4 d5 2.c4 e5 (Adolf Albin)
Alburt Variation of the Alekhine's Defence 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 (Lev Alburt)
Alekhine's Defence 1.e4 Nf6 (Alexander Alekhine)
Alekhine Variation of the Budapest Gambit 1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 (Alexander Alekhine)
Allgaier Gambit of the King's Gambit 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g5 5.Ng5 (Johann Baptist Allgaier)
Anderssen's Opening 1.a3 (Adolf Anderssen)
Arkell-Khenkin Variation of the Caro-Kann Defense 1.e4 c6 2.d4 d5 3.e5 c5 (Keith Arkell; Igor Khenkin)
Averbakh System of the King's Indian Defence 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 0-0 6.Bg5 (Yuri Averbakh)
Balogh Defense 1.e4 d6 2.d4 f5 János Balogh
Barnes Opening 1.f3 (Thomas Wilson Barnes)
Basman Defence 1.e4 g5 (Michael Basman)
Becker Defense of the King's Gambit 1.e4 e5 2.f4 exf4 3.Nf3 h6 (Albert Becker)
Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 (Pal Benko)
Benko's Opening 1.g3 (Pal Benko)
Bird Defense of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4 (Henry Bird)
Bird's Opening 1.f4 (Henry Bird)
Blackburne Shilling Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4 (Joseph Henry Blackburne)
Blackmar-Diemer Gambit 1.d4 d5 2.e4 dxe4 3.Nc3 (Armand Blackmar; Emil Josef Diemer)
Blumenfeld Gambit 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nf3 b5 (Benjamin Blumenfeld)
Bogoljubow Defense 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ (Efim Bogoljubov)
Boleslavsky Variation of the Sicilian Defence 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 (Isaac Boleslavsky)
Bonsch-Osmolovsky Defense of the King's Gambit 1.e4 e5 2.f4 exf4 3.Nf3 Ne7 (Mikhail Bonch-Osmolovsky)
Botvinnik System of the Semi-Slav Defense 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.Bg5 dxc4 6.e4 b5 (Mikhail Botvinnik)
Botvinnik Variation of the English Opening 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4 (Mikhail Botvinnik)
Brentano Defense of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 g5 (Hans Brentano)
Breyer Variation of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 0-0 9.h3 Nb8 (Gyula Breyer)
Breyer Variation of the King's Gambit 1.e4 e5 2.f4 exf4 3.Qf3 (Gyula Breyer)
Capablanca Variation of the Reti Opening 1.Nf3 d5 2.c4 c6 3.b3 Nf6 4.Bb2 Bg4 (José Raúl Capablanca)
Caro-Kann Defence 1.e4 c6 (Horatio Caro; Marcus Kann)
Chekhover Variation of the Sicilian Defence 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 (Vitaly Chekhover)
Chigorin Defence of the Queen's Gambit 1.d4 d5 2.c4 Nc6 (Mikhail Chigorin)
Chigorin Variation of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 0-0 9.h3 Na5 (Mikhail Chigorin)
Clemenz Opening 1.h3 (Hermann Clemenz)
Cochrane Gambit of the Petrov's Defence 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nxf7 (John Cochrane)
Colle System 1.d4 d5 2.Nf3 Nf6 3.e3 (Edgard Colle)
Colman Variation of the Two Knights Defense 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Qf3 Rb8 (Eugene Ernest Colman)
Cunningham Defense of the King's Gambit 1.e4 e5 2.f4 exf4 3.Nf3 Be7 (Alexander Cunningham)
Damiano Defence 1.e4 e5 2.Nf3 f6 (Pedro Damiano)
Desprez Opening 1.h4 (Marcel Desprez)
Dunst Opening 1.Nc3 (Ted A. Dunst)
Durkin Opening 1.Na3 (Robert Durkin)
Duras Variation of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4. Ba4 d6 5.c4 (Oldřich Duras)
Eisenberg Gambit of the King's Gambit 1.e4 e5 2.f4 exf4 3.Nh3 (L R Eisenberg)
Englund Gambit 1.d4 e5 (Fritz Carl Anton Englund)
Epishin Variation of the Benko Gambit 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 g6 6.Nc3 Bxa6 7.Nf3 d6 8.g3 Bg7 9.Bg2 Nbd7 10.Rb1 (Vladimir Epishin)
Evans Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 (William Davies Evans)
Fajarowicz Variation of the Budapest Gambit 1.d4 Nf6 2.c4 e5 3.dxe5 Ne4 (Sammi Fajarowicz)
Falkbeer Countergambit of the King's Gambit 1.e4 e5 2.f4 d5 (Ernst Falkbeer)
Fischer Defense of the King's Gambit 1.e4 e5 2.f4 exf4 3.Nf3 d6 (Bobby Fischer)
Fleissig Variation of the Scotch Game 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.Nc2 (Bernhard Fleissig)
Flohr Variation of the Grünfeld Defence 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qa4+ (Salo Flohr)
From's Gambit of the Bird's Opening 1.f4 e5 (Martin Severin From)
Furman Variation of the Queen's Gambit Accepted 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.dxc5 Bxc5 (Semyon Furman)
Gajewski Variation of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 0-0 9.h3 Na5 10.Bc2 d5 (Grzegorz Gajewski)
Glek Defense of the King's Indian Defence 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Na6 (Igor Glek)
Glek Variation of the Four Knights Game 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.g3 (Igor Glek)
Goering Gambit of the Scotch Game 1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 (Carl Göring)
Goglidze Attack 1.d4 Nf6 2.c4 g6 3.f3 d5 (Viktor Goglidze)
Grob's Attack 1.g4 (Henri Grob)
Gunderam Defense 1.e4 e5 2.Nf3 Qe7 (Gerhard Gunderam)
Gurgenidze Defense of the Modern Defense 1.e4 g6 2.d4 Bg7 3.Nc3 c6 4.f4 d5 5.e5 h5 (Bukhuti Gurgenidze)
Gurgenidze Variation of the Caro-Kann Defence 1.e4 c6 2.d4 d5 3.Nc3 b5 (Bukhuti Gurgenidze)
Gusev Countergambit of the Queen's Gambit Declined 1.d4 d5 2.c4 c5 3.cxd5 Nf6 (Yuri S Gusev)
Grivas Variation of the Sicilian Defence 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qb6 (Efstratios Grivas)
Grünfeld Defence 1.d4 Nf6 2.c4 g6 3.Nc3 d5 (Ernst Grünfeld)
Hanham Variation of the Philidor Defense 1.e4 e5 2.Nf3 d6 3.d4 Nd7 (James Hanham)
Hodgson Attack 1.d4 d5 2.Bg5 (Julian Hodgson)
Hopton Attack of the Dutch Defence 1.d4 f5 2.Bg5 (R Hopton)
Hromádka System of the Benoni Defence 1.d4 Nf6 2.c4 c5 3.d5 d6 (Karel Hromádka)
Hübner Variation of the Nimzo-Indian Defence 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 (Robert Hübner)
Ilyin-Genevsky Variation of the Dutch Defence 1.d4 f5 2.c4 Nf6 3.g3 e6 4.Bg2 Be7 5.Nf3 0-0 6.0-0 d6 7.Nc3 Qe8 (Alexander Ilyin-Genevsky)
Jaenisch Gambit of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 (Carl Jaenisch)
Jasnogrodsky Defense of the Rice Gambit 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.0-0 Bxe5 9.Re1 Qe7 10.c3 Nh5 (Nicolai Jasnogrodsky)
Kan Variation of the Sicilian Defence 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 (Ilya Kan)
Karklins-Martinovsky Variation of the Petrov's Defence 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nd3 (Andrew Karklins; Eugene Martinovsky)
Karpov Variation of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 0-0 9.h3 Nd7 (Anatoly Karpov)
Katalymov Variation of the Sicilian Defence 1.e4 c5 2.Nf3 b6 (Boris Katalymov)
Keene Defense of the King's Gambit 1.e4 e5 2.f4 Qh4+ 3.g3 Qe7 (Raymond Keene)
Keres Attack of the Sicilian Defence 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g4
Keres Defence 1.d4 e6 2.c4 Bb4+ (Paul Keres)
Keres Variation of the Sicilian Defence 1.e4 c5 2.Ne2 (Paul Keres)
Kevitz Variation of the English Opening 1.c4 Nf6 2.Nc3 e6 3.e4 Nc6 (Alexander Kevitz)
Kholmov Variation of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 0-0 9.h3 Be6 (Ratmir Kholmov)
Kieseritzky Gambit of the King's Gambit 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g5 5.Ne5 (Lionel Kieseritzky)
Knorre Variation of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.Nc3 (Viktor Knorre)
Kondratiyev Variation of the French Defence 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.Bd3 c5 5.exd5 Qxd5 6.Bd2 (Pavel E Kondratiev)
Konikowski Gambit of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc5 4.c3 d5 (Jerzy Konikowski)
Konstantinopolsky Opening 1.e4 e5 2.Nf3 Nc6 3.g3 (Alexander Konstantinopolsky)
Larsen's Opening 1.b3 (Bent Larsen)
Leko Gambit of the Anti-Grünfeld 1.d4 Nf6 2.c4 g6 3.f3 e5 (Peter Leko)
Levenfish Variation of the Grünfeld Defence 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 b6 (Grigory Levenfish)
Lolli Variation of the Two Knights Defense 1.e4 e5 2.Nf3 Nc6 3.Bf4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.d4 (Giambattista Lolli)
Lundin Defense 1.d4 Nc6 (Erik Lundin)
Lutikov Variation of the Grünfeld Defence 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.f3 (Anatoly Lutikov)
Makogonov System of the King's Indian Defence 1.d4 Nf6 2. c4 g6 3.Nc3 Bg7 4.e4 d6 5.h3 (Vladimir Makogonov)
Makogonov Variation of the Grünfeld Defence 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 0-0 6.b4 (Vladimir Makogonov)
Maróczy Bind of the Sicilian Defence 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 (Géza Maróczy)
Marshall Attack of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 d5 (Frank Marshall)
Marshall Defense to the Queen's Gambit 1.d4 d5 2.c4 Nf6 (Frank Marshall)
Marshall Gambit of the Semi-Slav Defense 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Bd2 (Frank Marshall)
Max Lange Attack of the Two Knights Defense 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.0-0 Bc5 6.e5 (Max Lange)
McCutcheon Variation of the French Defence 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 (John Lindsay McCutcheon)
Mieses Opening 1.d3 (Jacques Mieses)
Mikenas Variation of the Modern Benoni 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.e5 (Vladas Mikėnas)
Miles Variation of the Queen's Indian Defense 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Bf4 (Tony Miles)
Möller Attack of the Italian Game 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d4 cxd4 6.cxd4 Bb4+ 7.Nc3 Nxe4 8.0-0 Bxc3 9.d5 (Jorgen Moeller)
Morozevich Variation of the French Defence 1.e4 e6 2.d4 d5 3.Nd2 Be7 (Alexander Morozevich)
Morphy Gambit of the French Defence 1.e4 e6 2.d4 d5 3.Nh3 (Paul Morphy)
Muzio Gambit of the King's Gambit 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 g4 5.0-0 gxf3 6.Qxf3 (Muzio)
Nadanian Attack of the Queen's Pawn Opening 1.d4 Nf6 2.Nf3 h6 3.c4 g5 (Ashot Nadanian)
Nadanian Variation of the Grünfeld Defence 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.Na4 (Ashot Nadanian)
Najdorf Variation of the Sicilian Defence 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 (Miguel Najdorf)
Napoleon Opening 1.e4 e5 2.Qf3 (Napoleon I of France)
Nimzo-Indian Defence 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 (Aron Nimzowitsch)
Nimzowitsch Defence 1.e4 Nc6 (Aron Nimzowitsch)
Noteboom Variation of the Semi-Slav Defence 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 (Daniël Noteboom)
O'Kelly Variation of the Sicilian Defence 1.e4 c5 2.Nf3 a6 (Albéric O'Kelly de Galway)
Opocensky Variation of the Grünfeld Defence 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 Bg7 5.Nf3 O-O 6.Bd2 (Karel Opočenský)
Owen's Defense 1.e4 b6 (John Owen)
Panov Attack of the Caro-Kann Defence 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 (Vasily Panov)
Parham Attack 1.e4 e5 2.Qh5 (Bernard Parham)
Paulsen Attack of the Petrov's Defence 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nc4 (Louis Paulsen)
Petrosian Variation of the King's Indian Defence 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 (Tigran Petrosian)
Petrosian Variation of the Queen's Indian Defense 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 (Tigran Petrosian)
Perenyi Attack of the Sicilian Defence 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.g4 e5 8.Nf5 g6 9.g5 (Bela Perenyi)
Petrov Defense 1.e4 e5 2.Nf3 Nf6 (Alexander Petrov)
Philidor Defence 1.e4 e5 2.Nf3 d6 (François-André Danican Philidor)
Pirc Defence 1.e4 d6 2.d4 Nf6 3.Nc3 g6 (Vasja Pirc)
Pollock's Defense of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Na5 (William Pollock)
Ponziani Opening 1.e4 e5 2.Nf3 Nc6 3.c3 (Domenico Lorenzo Ponziani)
Prié Attack of the Queen's Pawn Opening 1.d4 d5 2.a3 (Éric Prié)
Puc Variation of the Nimzo-Indian Defence 1.d4 Nf6 2.c4 e6 3. Nc3 Bb4 4.e3 c6 (Stojan Puc)
Quinteros Variation of the Sicilian Defence 1.e4 c5 2.Nf3 Qc7 (Miguel Quinteros)
Ragozin Defence of the Queen's Gambit 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 Bb4 (Viacheslav Ragozin)
Rauzer Variation of the Sicilian Defence 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 (Vsevolod Rauzer)
Réti Opening 1.Nf3 (Richard Réti)
Rice Gambit of the King's Gambit 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4 5.Ne5 Nf6 6.Bc4 d5 7.exd5 Bd6 8.0-0 (Isaac Rice)
Richter Attack 1.d4 d5 2.Nc3 Nf6 3.Bg5 (Kurt Richter)
Riumin Variation of the Queen's Indian Defense 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 Be7 (Nikolai Riumin)
Rossolimo Variation of the Sicilian Defence 1.e4 c5 2.Nf3 Nc6 3.Bb5 (Nicolas Rossolimo)
Rousseau Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 f5 4.d3 (Eugène Rousseau)
Rubinstein Variation of the French Defence 1.e4 e6 2.d4 d5 3.Nc3 dxe4 (Akiba Rubinstein)
Rubinstein Variation of the Budapest Gambit 1.d4 Nf6 2.c4 e5 3.dxe4 Ng4 4.Bf4 (Akiba Rubinstein)
Rubinstein Variation of the Nimzo-Indian Defence 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 (Akiba Rubinstein)
Rubinstein Variation of the Four Knights Game 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Nd4 (Akiba Rubinstein)
Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 (Ruy López de Segura)
Sämisch Variation of the King's Indian Defence 1.d4 Nf6 2. c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 (Friedrich Sämisch)
Sämisch Variation of the Nimzo-Indian Defence 1.d4 Nf6 2. c4 e6 3.Nc3 Bb4 4.a3 (Friedrich Sämisch)
Santasiere's Folly 1. Nf3 Nf6 2. b4 (Anthony Santasiere)
Schallopp Defense of the King's Gambit 1.e4 e5 2.f4 exf4 3.Nf3 Nf6 (Emil Schallopp)
Schlechter Variation of the French Defence 1.e4 e6 2.d4 d5 3.Bd3 (Carl Schlechter)
Schlechter Variation of the Grunfeld Defence 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.e3 c6 (Carl Schlechter)
Schlechter Variation of the Slav Defence 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 g6 (Carl Schlechter)
Schlechter Gambit of the Bird's Opening 1.f4 e5 2.fxe5 Nc6 (Carl Schlechter)
Smith-Morra Gambit of the Sicilian Defence 1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 (Kenneth Ray Smith; Pierre Morra)
Smyslov Variation of the Grünfeld Defence 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 (Vasily Smyslov)
Smyslov Variation of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 0-0 9.h3 h6 (Vasily Smyslov)
Snyder Variation of the Sicilian Defence 1.e4 c5 2.b3 (Robert M. Snyder)
Sokolsky Opening 1.b4 (Alexey Sokolsky)
Soultanbeieff Variation of Slav Defence 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 e6 (Victor Soultanbeieff)
Sozin Attack of the Sicilian Defence 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 e6 7.Be3 Be7 8.Bb3 0-0 9.0-0 (Veniamin Sozin)
Spielmann Variation of the Caro-Kann Defence 1.e4 c6 2.Nc3 d5 3.Qf3 (Rudolf Spielmann)
Stamma Gambit of the King's Gambit 1.e4 e5 2.f4 exf4 3.h4 (Philipp Stamma)
Staunton Gambit of the Dutch Defence 1.d4 f5 2.e4 (Howard Staunton)
Steinitz Variation of the Petrov Defense 1.e4 e5 2.Nf3 Nf6 3.d4 (Wilhelm Steinitz)
Steinitz Defense of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 d6 (Wilhelm Steinitz)
Steinitz Variation of the Sicilian Defence 1.e4 c5 2.g3 (Wilhelm Steinitz)
Sveshnikov Variation of the Sicilian Defence 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 (Evgeny Sveshnikov)
Taimanov Variation of the Sicilian Defence 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 (Mark Taimanov)
Tarrasch Defense 1.d4 d5 2.c4 e6 3.Nc3 c5 (Siegbert Tarrasch)
Tarrasch Variation of the French Defence 1.e4 e6 2.d4 d5 3.Nd2 (Siegbert Tarrasch)
Tennison Gambit 1.Nf3 d5 2.e4 (Tennison)
Torre Attack 1.d4 Nf6 2.Nf3 e6 3.Bg5 (Carlos Torre Repetto)
Traxler Variation of the Two Knights Defence 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5 (Karel Traxler)
Trompowsky Attack 1.d4 Nf6 2.Bg5 (Octavio Trompowsky)
Ufimtsev Defence 1.e4 d6 2.d4 Nf6 3.Nc3 g6 (Anatoly Ufimtsev)
Van 't Kruijs Opening 1.e3 (Maarten van 't Kruijs)
Velimirovic Attack of the Sicilian Defence 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Nc6 7.Be3 Be7 8.Qe2 (Dragoljub Velimirović)
Veresov Opening 1.d4 d5 2.Nc3 Nf6 3.Bg5 (Gavriil Veresov)
Vinogradov Variation of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 Qe7 (Vinogradov)
Vitolins Variation of the Sicilian Defence 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bb5+ (Alvis Vitolinš)
Wade Defence 1.d4 d6 2.Nf3 Bg4 Robert Wade
Ware Opening 1.a4 (Preston Ware)
Winawer Variation of the French Defence 1.e4 e6 2.d4 d5 3.Nc3 Bb4 (Szymon Winawer)
Zaitsev Gambit of the Grünfeld Defence 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.h4 (Alexander Zaitsev)
Zaitsev Variation of the Ruy Lopez 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 0-0 8.c3 0-0 9.h3 Bb7 (Igor Zaitsev)
Zilbermints Gambit of the Englund Gambit 1.d4 e5 2.dxe5 Nc6 3.Nf3 Nge7 (Lev Zilbermints)
Zvjaginsev Variation of the Sicilian Defence 1.e4 c5 2.Na3 (Vadim Zvjaginsev)
