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Opening Explorer  [By ECO Code]

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'A' - Flank Openings
A00 Irreg. (incl. Grob; Polish [Sokolsky])
A01 Nimzovich-Larsen attack
A02 Bird (incl.From gambit)
A03 Bird's Opening : Lasker Variation
A04 Reti
A05 Reti : King's Indian Attack
A06 Reti : Old Indian Attack
A07 Reti : King's Indian Attack
A08 Reti : King's Indian Attack
A09 Reti : Advance Variation & Keres var
A10-A39 English Opening
A40 Queen's pawn
A41 Old Indian Defence
A42 Modern Robatsch
A43 Old Benoni : Franco-Benoni defence
A44 Old Benoni Defence
A45 Trompowsky & d4 Irreg.
A46 Queen's Pawn Game (Incl. London System)
A47 Queen's Indian Defence
A48 King's Indian : East Indian Defence
A49 King's Indian : Fianchetto without c4
A50 Queen's pawn game
A51 Budapest Defence
A52 Budapest Defence (Declined)
A53-A55 Old Indian Defence
A56 Benoni Defence
A57-A59 Benko Gambit
A60-A79 Benoni Defence (Modern)
A80-A99 Dutch
'B' - 'Semi-Open' games (Other than the French Defence)
B00 King's Pawn irreg. (incl Nimzowitch Def)
B01 Scandinavian Gambit (incl Centre Counter)
B02-B05 Alekhine's Defence
B06 Robatsch (Modern) Defence
B07-B09 Pirc
B10-B19 Caro-Kann Defence
B20 Sicilian Defence (Wing)
B21 Grand Pix / Smith Morra
B22 Sicilian Defence : Alapin
B23-B26 Sicilian Defence : Closed
B27-B28 O'Kelly variation
B29-B31 Nimzovich-Rubinstein Variation (Incl Rossolimo)
B32 Labourdonnais-Loewenthal (Kalashnikov)
B33 Lasker/Pelikan (Sveshnikov) Variation
B34-B39 Accelerated Fianchetto
B40 Anderssen variation
B41-B43 Kan Variation
B44 Sicilian, Szen, hedgehog Variation
B45-B49 Taimanov Variation
B50 Wing Gambit Deferred
B51 Canal-Sokolsky
B52 Canal-Sokolsky Attack, 3...Bd7
B53 Sicilian, Chekhover Variation
B54-B55 Prins Variation, Venice Attack
B56 Venice Attack
B57 Sozin, not Scheveningen
B58-B59 Boleslavsky Variation
B60-B69 Richter-Rauzer
B70-B79 Dragon variation
B80-B85 Scheveningen Variation
B86-B89 Sozin Attack
B90-B99 Najdorf
'C' - 'Open' games (and the French Defence)
C01 French : Exchange Variation
C02 French : Advance variation
C03-C09 French : Tarrasch
C10 French : Rubinstein variation
C11 French : Burn Variation
C12 French : MacCutcheon Variation
C13 French : Albin-Alekhine-Chatard Attack
C14 French : Classical Variation
C15-C19 French : Winawer (Nimzovich) variation
C20 Alapin's Opening
C21 Centre Game (Danish Gambit)
C22 Centre Game
C23-C24 Bishop's Opening
C25-C29 Vienna Game/Vienna Gambit
C30 King's Gambit Declined
C31-C32 KGD (Falkbeer Counter Gambit)
C33 King's Gambit Accepted
C34 King's Gambit Accepted : King's Knight's Gambit
C35 KGA : Cunningham defence
C36 KGA : Abbazia defence
C37 KGA : Muzio Lolli Variations
C38 KGA : Greco gambit
C39 KGA : Allgaier Gambit, Kieseritsky
C40 Others incl Damiano, Latvian
C41 Philidor Defence
C42-C43 Petrov
C44 Ponziani, Scotch
C45 Scotch game
C46 Three Knights Game
C47-C49 Four Knights
C51-C52 Giuoco Piano (Evans Gambit)
C50-C55 Giuoco Piano
C56-C59 Two Knights Defence
C60 Ruy Lopex : Cozio
C61 Bird's Defence
C62 Ruy Lopez : Old Steinitz defence
C63 Ruy Lopez : Schliemann defence
C64 Ruy Lopez : Classical (Cordel) Defence
C65 Ruy Lopez : Berlin Defence
C66 Ruy Lopez : Closed Berlin defence
C67 Berlin Def
C68-C69 Ruy Lopez : Exchange Variation
C70 Ruy Lopez : Alapin's defence deferred
C71-C76 Ruy Lopez : Modern Steinitz Defence
C77 Ruy Lopez : Morphy Defence
C78 Ruy Lopez : Archangel Variation
C79 Ruy Lopez : Steinitz defence deferred
C80 Ruy Lopez : Open (Tarrasch) Defence
C81 Ruy Lopez : Open, Howell attack
C82 Ruy Lopez : Open, Dilworth variation
C83 Ruy Lopez : Open, 9...Be7, 10.Re1
C84 Ruy Lopez : Closed defence
C85 Ruy Lopez : Exchange doubly deferred
C86 Ruy Lopez : Worrall attack
C87 Ruy Lopez : Closed, Averbach variation
C88 Ruy Lopez : Closed
C89 Ruy Lopez : Marshall Counter-Attack
C90-C99 Ruy Lopez : Closed
'D' - 'Closed' and 'Semi-Closed' games (incl. the Grünfeld Defence)
D00 Q Pawn, Blackmar-Diemer Gambit
D01 Richter-Veresov Attack
D02 Queen's pawn game
D03 Torre Attack
D04 Queen's Pawn Game
D05 Colle system
D07 QGD : Chigorin Defence
D08 QGD : Albin counter-gambit
D09 QGD : Albin Counter-Gambit, 5.g3
D10-D19 QGD Slav
D20-D25 Queen's Gambit Accepted
D26-D29 QGA : Classical variation
D30-D31 QGD : Slav & Semi Slav
D32-D34 Queens' Gambit Declined : Tarrasch Defence
D35-D36 QGD : Exchange Variation
D37-D39 QGD : Ragozin Variation
D40-D42 QGD : Semi-Tarrasch defence
D43-D49 QGD : Semi-Slav (Incl Meran)
D50 QGD : Canal (Venice) variation
D51 QGD : Alekhine variation
D52 QGD : Cambridge Springs Defence
D53 QGD : Lasker Variation
D54 QGD : Anti-neo-Orthodox Variation
D55 QGD : Neo-Orthodox Variation
D56-D57 QGD : Lasker Defence
D58-D59 QGD : Tartakower Variation
D60-D69 QGD : Orthodox Defence
D70-D99 Grunfeld Defence
'E' - Indian Defences (Other than the Grünfeld Defence)
E00 Neo-Indian (Seirawan) Attack
E00 Catalan Opening
E01 Catalan : Closed
E02 Catalan : Open, 5.Qa4
E03 Catalan : Open, Alekhine Variation
E03 Catalan : Open, 5.Qa4 Nbd7, 6.Qxc4
E04 Catalan : Open, 5.Nf3
E05 Catalan : Open, Classical Line
E06 Catalan : Closed, 5.Nf3
E07 Catalan : Closed, 6...Nbd7
E07 Catalan : Closed, Botvinnik Variation
E08 Catalan : Closed, 7.Qc2
E08 Catalan : Closed, Zagoryansky Variation
E08 Catalan : Closed, Qc2 & B3
E08 Catalan : Closed, Spassky Gambit
E09 Catalan : Closed, Main Line
E09 Catalan : Closed, Sokolsky Variation
E10 Queen's Pawn Game
E10 Blumenfeld Counter-Gambit
E10 Blumenfeld Counter-Gambit Accepted
E10 Blumenfeld Counter-Gambit, Dus-Chotimursky Variation
E10 Blumenfeld Counter-Gambit, Spielmann Variation
E10 Dzindzikhashvili Defence
E10 Doery Defence
E11 Bogo-Indian Defence
E11 Bogo-Indian Defence, Gruenfeld Variation
E11 Bogo-Indian Defence, Nimzovich Variation
E12 Queen's Indian Defence
E12 Queen's Indian : Miles Variation
E12 Queen's Indian : Petrosian System
E12 Queen's Indian : 4.Nc3
E12 Queen's Indian : 4.Nc3, Botvinnik Variation
E13 Queen's Indian : 4.Nc3, Main Line
E14 Queen's Indian : 4.E3
E14 Queen's Indian : Averbakh Variation
E15 Queen's Indian : 4.G3
E15 Queen's Indian : Nimzovich Variation (Exaggerated Fianchetto)
E15 Queen's Indian : 4.G3 Bb7
E15 Queen's Indian : Rubinstein Variation
E15 Queen's Indian : Buerger Variation
E16 Queen's Indian : Capablanca Variation
E16 Queen's Indian : Yates Variation
E16 Queen's Indian : Riumin Variation
E17 Queen's Indian : 5.Bg2 Be7
E17 Queen's Indian : Anti-Queen's Indian System
E17 Queen's Indian : Opovcensky Variation
E17 Queen's Indian : Old Main Line, 6.O-O
E17 Queen's Indian : Euwe Variation
E18 Queen's Indian : Old Main Line, 7.Nc3
E19 Queen's Indian : Old Main Line, 9.Qxc3
E20 Nimzo-Indian Defence
E20 Nimzo-Indian : Kmoch Variation
E20 Nimzo-Indian : Mikenas Attack
E20 Nimzo-Indian : Romanishin-Kasparov (Steiner) System
E21 Nimzo-Indian : Three Knights Variation
E22 Nimzo-Indian : Spielmann Variation
E23 Nimzo-Indian : Spielmann, 4...C5, 5.Dc Nc6
E23 Nimzo-Indian : Spielmann, Karlsbad Variation
E23 Nimzo-Indian : Spielmann, San Remo Variation
E23 Nimzo-Indian : Spielmann, Staahlberg Variation
E24 Nimzo-Indian : Saemisch, Botvinnik Variation
E25 Nimzo-Indian : Saemisch Variation
E26 Nimzo-Indian : Saemisch, O'Kelly Variation
E27 Nimzo-Indian : Saemisch Variation
E28 Nimzo-Indian : Saemisch Variation
E29 Nimzo-Indian : Saemisch, Main Line
E29 Nimzo-Indian : Saemisch, Capablanca Variation
E30 Nimzo-Indian : Leningrad Variation
E31 Nimzo-Indian : Leningrad, Main Line
E32 Nimzo-Indian : Classical Variation
E33 Nimzo-Indian : Classical, Milner-Barry (Zurich) Variation
E34 Nimzo-Indian : Classical, Noa Variation
E35 Nimzo-Indian : Classical, Noa Variation, 5.Cd Ed
E36 Nimzo-Indian : Classical, Botvinnik Variation
E36 Nimzo-Indian : Classical, Noa Variation, Main Line
E37 Nimzo-Indian : Classical, Noa Variation, Main Line, 7.Qc2
E37 Nimzo-Indian : Classical, San Remo Variation
E38 Nimzo-Indian : Classical, 4...C5
E39 Nimzo-Indian : Classical, Pirc Variation
E40 Nimzo-Indian : 4.E3
E41 Nimzo-Indian : E3, Huebner Variation
E42 Nimzo-Indian : 4.E3 C5, 5.Ne2 (Rubinstein)
E43 Nimzo-Indian : Fischer Variation
E44 Nimzo-Indian : Fischer Variation, 5.Ne2
E45 Nimzo-Indian : 4.E3, Bronstein (Byrne) Variation
E46 Nimzo-Indian : 4.E3 O-O
E46 Nimzo-Indian : Reshevsky Variation
E47 Nimzo-Indian : 4.E3 O-O, 5.Bd3
E48 Nimzo-Indian : 4.E3 O-O, 5.Bd3 D5
E49 Nimzo-Indian : 4.E3, Botvinnik System
E50 Nimzo-Indian : 4.E3 E8G8, 5.Nf3, Without ...D5
E51 Nimzo-Indian : 4.E3, Ragozin Variation
E52 Nimzo-Indian : 4.E3, Main Line With ...B6
E53 Nimzo-Indian : 4.E3, Main Line With ...C5
E53 Nimzo-Indian : 4.E3, Keres Variation
E53 Nimzo-Indian : 4.E3, Gligoric System With 7...Nbd7
E54 Nimzo-Indian : 4.E3, Gligoric System, Smyslov Variation
E55 Nimzo-Indian : 4.E3, Gligoric System, Bronstein Variation
E56 Nimzo-Indian : 4.E3, Main Line With 7...Nc6
E57 Nimzo-Indian : 4.E3, Main Line With 8...Dc And 9...Cd
E58 Nimzo-Indian : 4.E3, Main Line With 8...Bxc3
E59 Nimzo-Indian : 4.E3, Main Line
E60 King's Indian Defence
E60 King's Indian : Anti-Gruenfeld
E60 King's Indian : Danube Gambit
E60 King's Indian : 3.G3, Counterthrust Variation
E61 King's Indian Defence, 3.Nc3
E61 King's Indian : Smyslov System
E62 King's Indian : Fianchetto Variation
E62 King's Indian : Fianchetto, Larsen System
E62 King's Indian : Fianchetto, Kavalek (Bronstein) Variation
E62 King's Indian : Fianchetto, Simagin Variation
E63 King's Indian : Fianchetto, Panno Variation
E64 King's Indian : Fianchetto, Yugoslav System
E65 King's Indian : Fianchetto, Yugoslav, 7.O-O
E66 King's Indian : Fianchetto, Yugoslav Panno
E67 King's Indian : Fianchetto, Classical Variation
E68 King's Indian : Fianchetto, Classical Variation, 8.E4
E69 King's Indian : Fianchetto, Classical Main Line
E70 King's Indian : Kramer System
E70 King's Indian : Accelerated Averbakh System
E71 King's Indian : Makagonov System (5.H3)
E72 King's Indian With E4 & G3
E72 King's Indian : Pomar System
E73 King's Indian : 5.Be2
E73 King's Indian : Semi-Averbakh System
E73 King's Indian : Averbakh System
E74 King's Indian : Averbakh, 6...C5
E75 King's Indian : Averbakh, Main Line
E76 King's Indian : Four Pawns Attack
E77 King's Indian : Four Pawns Attack
E77 King's Indian : Four Pawns Attack, Florentine Gambit
E78 King's Indian : Four Pawns Attack, With Be2 And Nf3
E79 King's Indian : Four Pawns Attack, Main Line
E80 King's Indian : Saemisch Variation
E81 King's Indian : Saemisch, 5...O-O
E81 King's Indian : Saemisch, Byrne Variation
E82 King's Indian : Saemisch, Double Fianchetto Variation
E83 King's Indian : Saemisch, 6...Nc6
E83 King's Indian : Saemisch, Ruban Variation
E83 King's Indian : Saemisch, Panno Formation
E84 King's Indian : Saemisch, Panno Main Line
E85 King's Indian : Saemisch, Orthodox Variation
E86 King's Indian : Saemisch, Orthodox, 7.Nge2 C6
E87 King's Indian : Saemisch, Orthodox, 7.D5
E87 King's Indian : Saemisch, Orthodox, Bronstein Variation
E88 King's Indian : Saemisch, Orthodox, 7.D5 C6
E89 King's Indian : Saemisch, Orthodox Main Line
E90 King's Indian : 5.Nf3
E90 King's Indian : Larsen Variation
E90 King's Indian : Zinnowitz Variation
E91 King's Indian : 6.Be2
E91 King's Indian : Kazakh Variation
E92 King's Indian : Classical Variation
E92 King's Indian : Andersson Variation
E92 King's Indian : Gligoric-Taimanov System
E92 King's Indian : Petrosian System
E92 King's Indian : Petrosian System, Stein Variation
E93 King's Indian : Petrosian System, Main Line
E94 King's Indian : Orthodox Variation
E94 King's Indian : Orthodox, Donner Variation
E94 King's Indian : Orthodox, 7...Nbd7
E95 King's Indian : Orthodox, 7...Nbd7, 8.Re1
E96 King's Indian : Orthodox, 7...Nbd7, Main Line
E97 King's Indian : Orthodox, Aronin-Taimanov Variation (Yugoslav Attack / Mar Del Plata Variation)
E97 King's Indian : Orthodox, Aronin-Taimanov, Bayonet Attack
E98 King's Indian : Orthodox, Aronin-Taimanov, 9.Ne1
E99 King's Indian

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