KCEC
(Kirr's Chess Engine Comparison)
A tournament of original free chess engines
June 16, 2013
Testing summary:
Total: 135,679 games
played by 202 programs
1398 CPU days (X2 4600+)

White wins: 55,227 (40.7%)
Black wins: 47,434 (35.0%)
Draws: 33,018 (24.3%)
White score: 52.9%

Opening statistics

This page shows how many KCEC games were played from various known openings. The table also shows average draw percentage and white score.

ECOOpeningNumber
of
games
DrawsWhite
score
C75Ruy Lopez, modern Steinitz defence, Rubinstein variation3100.0%50.0%
C67Ruy Lopez, Berlin defence, Winawer attack3100.0%50.0%
A95Dutch, stonewall with Nc32100.0%50.0%
C39KGA, Kieseritsky, Rice gambit2100.0%50.0%
C33KGA, bishop's gambit, Steinitz defence2100.0%50.0%
C33KGA, bishop's gambit, Cozio (Morphy) defence1100.0%50.0%
A45Canard opening1100.0%50.0%
B06Robatsch defence, three pawns attack1100.0%50.0%
C31KGD, Falkbeer, 4.d31100.0%50.0%
D55QGD, Neo-orthodox variation1100.0%50.0%
C31KGD, Falkbeer, 3...e41100.0%50.0%
A42Modern defence, Averbakh system, Randspringer variation1100.0%50.0%
C41Philidor, Hanham, Delmar variation1100.0%50.0%
C48Four knights, Spielmann variation1100.0%50.0%
D00Blackmar-Diemer, Euwe defence1100.0%50.0%
A16English, Anglo-Gruenfeld, Smyslov defense1100.0%50.0%
E99King's Indian, orthodox, Aronin-Taimanov, Benko attack1100.0%50.0%
C39KGA, Kieseritsky, Paulsen defence1100.0%50.0%
C65Ruy Lopez, Berlin defence, Anderssen variation1100.0%50.0%
A82Dutch, Staunton gambit, Tartakower variation1100.0%50.0%
C42Petrov, classical attack, Krause variation1100.0%50.0%
A59Benko gambit, 7.e41100.0%50.0%
D86Gruenfeld, exchange, Simagin's improved variation1100.0%50.0%
C37KGA, MacDonnell gambit1100.0%50.0%
C44Tayler opening1100.0%50.0%
A81Dutch, Leningrad, Karlsbad variation1100.0%50.0%
A77Benoni, classical, 9...Re8, 10.Nd21100.0%50.0%
D00Queen's pawn, stonewall attack1100.0%50.0%
C12French, MacCutcheon, Chigorin variation1100.0%50.0%
A25English, closed, Taimanov variation1100.0%50.0%
B13Caro-Kann, Panov-Botvinnik, Czerniak variation1181.8%59.1%
B02Alekhine's defence, Brooklyn defence475.0%62.5%
C13French, Albin-Alekhine-Chatard attack, Maroczy variation475.0%37.5%
D52QGD, Cambridge Springs defence, Capablanca variation475.0%62.5%
D71Neo-Gruenfeld, 5.cd475.0%37.5%
A21English, Keres variation666.7%50.0%
C77Ruy Lopez, Morphy defence, Duras variation666.7%50.0%
A17English, Queens Indian, Romanishin variation366.7%66.7%
C74Ruy Lopez, modern Steinitz defence, siesta variation366.7%33.3%
B07Pirc, Holmov system366.7%66.7%
C49Four knights, symmetrical, Tarrasch variation366.7%66.7%
D32QGD, Tarrasch defence, Marshall gambit366.7%66.7%
C51Evans gambit declined, Cordel variation366.7%33.3%
C82Ruy Lopez, open, St. Petersburg variation862.5%56.3%
D97Gruenfeld, Russian variation with e41060.0%60.0%
A90Dutch-Indian, Alekhine variation560.0%70.0%
C57Two knights defence, Lolli attack560.0%70.0%
C77Ruy Lopez, Treybal (Bayreuth) variation (exchange var. deferred)560.0%70.0%
A94Dutch, stonewall with Ba3560.0%30.0%
C57Two knights defence, Pincus variation560.0%70.0%
A34English, symmetrical, Rubinstein system560.0%70.0%
E47Nimzo-Indian, 4.e3 O-O, 5.Bd31457.1%50.0%
D40QGD, Semi-Tarrasch defence, Pillsbury variation757.1%42.9%
C41Philidor, Hanham, Krause variation757.1%57.1%
C74Ruy Lopez, modern Steinitz defence1154.5%54.5%
D21QGA, Ericson variation1752.9%44.1%
E51Nimzo-Indian, 4.e3, Ragozin variation1650.0%43.8%
C50Hungarian defence1450.0%46.4%
C60Ruy Lopez, Cozio defence, Paulsen variation1050.0%55.0%
C13French, Albin-Alekhine-Chatard attack, Spielmann variation1050.0%65.0%
E84King's Indian, Saemisch, Panno main line850.0%50.0%
C96Ruy Lopez, closed (8...Na5)650.0%58.3%
C67Ruy Lopez, open Berlin defence, 5...Be7650.0%58.3%
D45QGD semi-Slav, Rubinstein (anti-Meran) system650.0%58.3%
C58Two knights defence, Kieseritsky variation650.0%58.3%
E02Catalan, open, 5.Qa4650.0%41.7%
D01Richter-Veresov attack, Veresov variation650.0%58.3%
E26Nimzo-Indian, Saemisch, O'Kelly variation450.0%50.0%
D81Gruenfeld, Russian variation450.0%50.0%
E27Nimzo-Indian, Saemisch variation450.0%25.0%
B06Robatsch defence, Gurgenidze variation450.0%75.0%
C42Petrov, classical attack, Mason variation450.0%50.0%
C66Ruy Lopez, closed Berlin defence, Showalter variation450.0%75.0%
C42Petrov, Damiano variation450.0%75.0%
C41Philidor, Hanham variation450.0%25.0%
C21Halasz gambit250.0%75.0%
A52Budapest, Alekhine variation250.0%25.0%
C33KGA, bishop's gambit, Boden defence250.0%75.0%
C32KGD, Falkbeer, main line, 7...Bf5250.0%25.0%
B74Sicilian, dragon, classical, Reti-Tartakower variation250.0%75.0%
B72Sicilian, dragon, classical, Grigoriev variation250.0%75.0%
C21Danish gambit250.0%75.0%
C71Ruy Lopez, modern Steinitz defence, Three knights variation250.0%75.0%
D50QGD, Semi-Tarrasch, Krause variation250.0%25.0%
C44Ponziani, Romanishin variation250.0%75.0%
D53QGD, 4.Bg5 Be7, 5.e3 O-O250.0%75.0%
E53Nimzo-Indian, 4.e3, Gligoric system with 7...Nbd7250.0%75.0%
C37KGA, Salvio gambit250.0%25.0%
C39KGA, Kieseritsky, Salvio (Rosenthal) defence250.0%75.0%
A03Bird's opening, Lasker variation250.0%75.0%
C37KGA, Muzio gambit, From defence250.0%25.0%
D33QGD, Tarrasch, Wagner variation250.0%75.0%
C33KGA, bishop's gambit, classical defence250.0%25.0%
C52Evans gambit, Alapin-Steinitz variation250.0%75.0%
C17French, Winawer, advance, Rauzer variation250.0%25.0%
C53Giuoco Piano, Anderssen variation250.0%75.0%
C52Evans gambit, compromised defence250.0%25.0%
C46Three knights, Schlechter variation250.0%75.0%
C23Bishop's opening, Lewis gambit250.0%25.0%
D32QGD, Tarrasch defence, 4.cd ed250.0%25.0%
A43Old Benoni, Schmid's system250.0%25.0%
C96Ruy Lopez, closed, Rossolimo defence250.0%75.0%
D87Gruenfeld, exchange, Spassky variation3447.1%58.8%
A21English, Troeger defence1747.1%64.7%
D80Gruenfeld defence1546.7%56.7%
D88Gruenfeld, Spassky variation, main line, 10...cd, 11.cd1546.7%56.7%
C63Ruy Lopez, Schliemann defence1145.5%68.2%
C66Ruy Lopez, closed Berlin defence, Wolf variation1844.4%50.0%
C73Ruy Lopez, modern Steinitz defence, Richter variation944.4%55.6%
C48Four knights, Ranken variation944.4%33.3%
C49Four knights, Nimzovich (Paulsen) variation944.4%55.6%
D12QGD Slav, Amsterdam variation944.4%44.4%
C46Four knights, Schultze-Mueller gambit944.4%44.4%
B02Alekhine's defence, Maroczy variation944.4%55.6%
C44Ponziani, Jaenisch counter-attack4843.8%51.0%
D75Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc33043.3%48.3%
B09Pirc, Austrian attack, dragon formation2142.9%54.8%
B05Alekhine's defence, modern variation, 4...Bg41442.9%64.3%
A25English, closed, Hort variation742.9%50.0%
C13French, Albin-Alekhine-Chatard attack, Breyer variation742.9%64.3%
E88King's Indian, Saemisch, orthodox, 7.d5 c6742.9%64.3%
C53Giuoco Piano, LaBourdonnais variation742.9%50.0%
E12Queen's Indian defence2642.3%40.4%
B39Sicilian, accelerated fianchetto, Breyer variation3141.9%50.0%
D55QGD, Petrosian variation3641.7%51.4%
B13Caro-Kann, exchange, Rubinstein variation1241.7%54.2%
B58Sicilian, classical1241.7%45.8%
A36English, symmetrical, Botvinnik system reversed1241.7%37.5%
B85Sicilian, Scheveningen, classical1241.7%45.8%
B15Caro-Kann, Forgacs variation1241.7%54.2%
B83Sicilian, Scheveningen, 6.Be22941.4%51.7%
B95Sicilian, Najdorf, 6...e62540.0%48.0%
E69King's Indian, fianchetto, classical main line2040.0%40.0%
C89Ruy Lopez, Marshall counter-attack, 11...c61540.0%33.3%
C66Ruy Lopez, Berlin defence, hedgehog variation1540.0%60.0%
E70King's Indian, 4.e41540.0%46.7%
C48Four knights, Rubinstein counter-gambit, Henneberger variation1540.0%60.0%
C22Centre game1040.0%70.0%
D75Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.dc540.0%60.0%
D48QGD semi-Slav, Meran, Pirc variation540.0%60.0%
C71Ruy Lopez, modern Steinitz defence540.0%40.0%
C43Petrov, modern attack, Bardeleben variation540.0%60.0%
A65Benoni, 6.e4540.0%40.0%
E36Nimzo-Indian, classical, Noa variation, 5.a3540.0%40.0%
C96Ruy Lopez, closed, Borisenko defence540.0%40.0%
A16English, Anglo-Gruenfeld defense540.0%40.0%
B72Sicilian, dragon, classical attack540.0%60.0%
A36English, symmetrical, Botvinnik system540.0%60.0%
B41Sicilian, Kan variation2839.3%58.9%
E34Nimzo-Indian, classical, Noa variation3638.9%58.3%
C44Ponziani opening1838.9%41.7%
C25Vienna, Paulsen variation2138.1%47.6%
C92Ruy Lopez, closed, Flohr-Zaitsev system (Lenzerheide variation)3737.8%73.0%
B32Sicilian, Labourdonnais-Loewenthal (Kalashnikov) variation2437.5%43.8%
C86Ruy Lopez, Worrall attack, solid line2437.5%43.8%
B36Sicilian, accelerated fianchetto, Gurgenidze variation2437.5%52.1%
C65Ruy Lopez, Berlin defence, Nyholm attack837.5%81.3%
E61King's Indian, Smyslov system837.5%43.8%
B33Sicilian, Pelikan, Bird variation837.5%56.3%
B45Sicilian, Taimanov, American attack837.5%31.3%
E70King's Indian, accelerated Averbakh system837.5%43.8%
C33KGA, Carrera (Basman) gambit837.5%18.8%
C49Four knights, symmetrical variation4337.2%55.8%
B15Caro-Kann, Tartakower (Nimzovich) variation3537.1%55.7%
D53QGD, 4.Bg5 Be73537.1%47.1%
D46QGD semi-Slav, Bogolyubov variation5736.8%57.0%
A54Old Indian, Ukrainian variation1936.8%71.1%
D35QGD, 3...Nf63336.4%51.5%
D62QGD, Orthodox defence, 7.Qc2 c5, 8.cd (Rubinstein)3336.4%54.5%
D50QGD, 4.Bg51136.4%63.6%
B06Robatsch defence, Two knights variation1136.4%54.5%
B12Caro-Kann, advance, Short variation1136.4%63.6%
C49Four knights, double Ruy Lopez13036.2%59.6%
B53Sicilian, Chekhover variation7035.7%49.3%
A27English, three knights system2835.7%46.4%
C01French, exchange, Svenonius variation1435.7%75.0%
C41Philidor, Nimzovich, Rellstab variation1435.7%75.0%
D25QGA, Smyslov variation3135.5%43.5%
A10English, Adorjan defence1735.3%47.1%
D59QGD, Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd58835.2%54.0%
B94Sicilian, Najdorf, 6.Bg52035.0%57.5%
A56Czech Benoni defence2035.0%57.5%
B29Sicilian, Nimzovich-Rubinstein variation2035.0%47.5%
C69Ruy Lopez, exchange, Gligoric variation5234.6%53.8%
A40Queen's pawn, Franco-Indian (Keres) defence8134.6%60.5%
C68Ruy Lopez, exchange, Keres variation3234.4%48.4%
A84Dutch defence, Rubinstein variation4734.0%55.3%
C44Scotch gambit, Dubois-Reti defence4734.0%46.8%
B52Sicilian, Canal-Sokolsky attack, Sokolsky variation8133.3%50.0%
E67King's Indian, fianchetto with ...Nd73633.3%50.0%
C02French, advance, Wade variation3333.3%53.0%
A07Reti, King's Indian attack, Keres variation3333.3%50.0%
A01Nimzovich-Larsen attack, English variation3033.3%43.3%
C76Ruy Lopez, modern Steinitz defence, fianchetto (Bronstein) variation2733.3%53.7%
C50Giuoco Piano2733.3%72.2%
A91Dutch defence2433.3%58.3%
D63QGD, Orthodox defence, 7.Rc11833.3%50.0%
B62Sicilian, Richter-Rauzer, Margate (Alekhine) variation1833.3%55.6%
C86Ruy Lopez, Worrall attack, sharp line1833.3%44.4%
A25English, closed system (without ...d6)1833.3%44.4%
D31QGD, semi-Slav, Abrahams variation1533.3%56.7%
C73Ruy Lopez, modern Steinitz defence, Alapin variation1533.3%36.7%
B44Sicilian, Szen, hedgehog variation1233.3%66.7%
C25Vienna game, Max Lange defence1233.3%50.0%
E13Queen's Indian, 4.Nc3, main line933.3%61.1%
D19QGD Slav, Dutch variation, main line933.3%72.2%
C41Philidor, Larsen variation933.3%83.3%
A51Budapest defence declined933.3%72.2%
E33Nimzo-Indian, classical, 4...Nc6933.3%50.0%
B42Sicilian, Kan, Gipslis variation933.3%61.1%
A61Benoni, fianchetto variation633.3%33.3%
C44Inverted Hanham633.3%16.7%
D21QGA, Alekhine defense, Borisenko-Furman variation633.3%50.0%
C80Ruy Lopez, open, 7.Bb3633.3%16.7%
C83Ruy Lopez, open, classical defence633.3%50.0%
C49Four knights, symmetrical, Maroczy system633.3%50.0%
B44Sicilian, Szen variation, Dely-Kasparov gambit633.3%50.0%
C23Bishop's opening, Philidor variation633.3%50.0%
B73Sicilian, dragon, classical, Richter variation333.3%83.3%
E85King's Indian, Saemisch, orthodox variation333.3%50.0%
B59Sicilian, Boleslavsky variation, 7.Nb3333.3%50.0%
B40Sicilian, Pin, Koch variation333.3%50.0%
C79Ruy Lopez, Steinitz defence deferred, Lipnitsky variation333.3%50.0%
E28Nimzo-Indian, Saemisch variation333.3%16.7%
B22Sicilian, 2.c3, Heidenfeld variation333.3%83.3%
A63Benoni, fianchetto, 9...Nbd7333.3%50.0%
E17Queen's Indian, Euwe variation333.3%50.0%
C39KGA, Kieseritsky, Kolisch defence333.3%83.3%
E89King's Indian, Saemisch, orthodox main line333.3%83.3%
C48Four knights, Marshall variation333.3%50.0%
D52QGD, Cambridge Springs defence, 7.cd333.3%83.3%
B02Alekhine's defence, Mokele Mbembe (Buecker) variation333.3%50.0%
A80Dutch, Spielmann gambit333.3%16.7%
B03Alekhine's defence, four pawns attack, 7.Be3333.3%50.0%
D22QGA, Alekhine defence, Alatortsev variation333.3%50.0%
D64QGD, Orthodox defence, Rubinstein attack, Karlsbad variation333.3%50.0%
A00Amsterdam attack333.3%83.3%
A12English, Torre defensive system333.3%50.0%
C13French, classical, Frankfurt variation333.3%83.3%
D31QGD, Janowski variation333.3%50.0%
B27Sicilian, Acton extension333.3%16.7%
A12English, Bled variation333.3%50.0%
C02French, advance, Steinitz variation8532.9%49.4%
C78Ruy Lopez, Archangelsk (counterthrust) variation7032.9%42.1%
B08Pirc, classical system, 5.Be218032.8%59.7%
D35QGD, exchange, positional line, 5...c65832.8%52.6%
D18QGD Slav, Dutch variation9232.6%53.3%
C15French, Winawer (Nimzovich) variation17232.6%59.3%
C69Ruy Lopez, exchange, Bronstein variation3732.4%45.9%
D77Neo-Gruenfeld, 6.O-O7132.4%51.4%
A14English, Symmetrical, Keres defence20132.3%57.5%
C65Ruy Lopez, Berlin defence6232.3%58.1%
E62King's Indian, fianchetto variation3132.3%48.4%
C09French, Tarrasch, open variation, main line62132.2%56.0%
C42Petrov, Cozio (Lasker) attack11532.2%50.9%
C42Petrov, Nimzovich attack10932.1%47.2%
A09Reti opening2532.0%64.0%
D11QGD Slav, Breyer variation2231.8%43.2%
E17Queen's Indian, anti-Queen's Indian system2231.8%47.7%
B01Scandinavian, Icelandic gambit2231.8%43.2%
D31QGD, semi-Slav, Noteboom variation2231.8%43.2%
E17Queen's Indian, Opovcensky variation6331.7%69.8%
B75Sicilian, dragon, Yugoslav attack4131.7%50.0%
E94King's Indian, orthodox, 7...Nbd79831.6%49.5%
D05Colle system1931.6%57.9%
C41Philidor, Nimzovich (Jaenisch) variation1931.6%63.2%
E10Blumenfeld counter-gambit, Dus-Chotimursky variation1931.6%52.6%
D99Gruenfeld defence, Smyslov, main line1631.3%53.1%
C80Ruy Lopez, open, 6.d41631.3%65.6%
B02Alekhine's defence, Two pawns' (Lasker's) attack1631.3%40.6%
D79Neo-Gruenfeld, 6.O-O, main line7731.2%50.6%
D76Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb62931.0%67.2%
C64Ruy Lopez, classical defence, Benelux variation 2931.0%50.0%
D17QGD Slav, Carlsbad variation7131.0%56.3%
D40QGD, Semi-Tarrasch defence30830.8%47.6%
D85Gruenfeld, modern exchange variation59830.8%48.5%
B60Sicilian, Richter-Rauzer2630.8%46.2%
C47Four knights, Scotch variation2630.8%57.7%
D46QGD semi-Slav, 6.Bd31330.8%61.5%
C42Petrov, Italian variation1330.8%53.8%
C80Ruy Lopez, open, Riga variation1330.8%53.8%
D82Gruenfeld, 4.Bf41330.8%61.5%
A22English, Bremen, reverse dragon22230.6%50.9%
C08French, Tarrasch, open, 4.ed ed51530.5%50.8%
C42Petrov, classical attack, Chigorin variation22030.5%52.0%
A33English, symmetrical variation20130.3%55.0%
B36Sicilian, accelerated fianchetto, Maroczy bind7630.3%50.7%
C43Petrov, modern attack, Symmetrical variation41130.2%51.6%
A38English, symmetrical variation13630.1%52.6%
A01Nimzovich-Larsen attack, classical variation9030.0%40.6%
C60Ruy Lopez, fianchetto (Smyslov/Barnes) defence4030.0%40.0%
C59Two knights defence, Steinitz variation2030.0%60.0%
C42Petrov, Kaufmann attack2030.0%60.0%
D36QGD, exchange, positional line, 6.Qc21030.0%45.0%
A38English, symmetrical, main line with d31030.0%45.0%
C44Scotch gambit, Benima defence1030.0%85.0%
B62Sicilian, Richter-Rauzer, Keres variation1030.0%55.0%
D64QGD, Orthodox defence, Rubinstein attack (with Rc1)1030.0%45.0%
A28English, four knights, Nimzovich variation6729.9%61.2%
C47Four knights, Scotch, 4...exd417129.8%50.0%
C88Ruy Lopez, closed, 7...O-O9429.8%47.9%
C84Ruy Lopez, closed defence4729.8%46.8%
A28English, four knights, Marini variation15829.7%53.5%
B33Sicilian defence6429.7%41.4%
C68Ruy Lopez, exchange variation5429.6%50.0%
D10QGD Slav defence, exchange variation11529.6%51.3%
B52Sicilian, Canal-Sokolsky attack, 3...Bd713629.4%50.7%
B06Robatsch defence, Two knights, Suttles variation5129.4%53.9%
E48Nimzo-Indian, 4.e3 O-O, 5.Bd3 d51729.4%55.9%
C80Ruy Lopez, open (Tarrasch) defence1729.4%44.1%
D15QGD Slav, Tolush-Geller gambit1729.4%44.1%
C80Ruy Lopez, open, 8...Be622829.4%44.5%
D30QGD Slav7529.3%48.0%
E05Catalan, open, classical line9929.3%57.1%
B12Caro-Kann, Tartakower (fantasy) variation4829.2%56.3%
B96Sicilian, Najdorf, 7.f42429.2%43.8%
B37Sicilian, accelerated fianchetto, Maroczy bind, 5...Bg72429.2%47.9%
E46Nimzo-Indian, Reshevsky variation2429.2%68.8%
A28English, four knights, Romanishin variation7929.1%50.0%
D41QGD, Semi-Tarrasch, 5.cd18929.1%55.8%
A11English, Caro-Kann defensive system5529.1%54.5%
A29English, four knights, kingside fianchetto250829.1%49.8%
A52Budapest, Adler variation3129.0%62.9%
C85Ruy Lopez, Exchange variation doubly deferred (DERLD)3129.0%53.2%
E09Catalan, closed, main line7628.9%56.6%
C96Ruy Lopez, closed (10...c5)3828.9%67.1%
E06Catalan, closed, 5.Nf363628.9%51.4%
C26Vienna, Paulsen-Mieses variation12128.9%52.5%
D37QGD, classical variation (5.Bf4)99628.9%51.3%
A21English, Kramnik-Shirov counterattack8328.9%48.2%
D97Gruenfeld, Russian, Prins variation9028.9%54.4%
D58QGD, Tartakower (Makagonov-Bondarevsky) system286328.7%52.0%
C07French, Tarrasch, open variation95128.7%52.7%
A50Kevitz-Trajkovich defence37428.6%50.1%
C45Scotch, Mieses variation8428.6%52.4%
C43Petrov, modern attack, main line5628.6%53.6%
C17French, Winawer, advance, Bogolyubov variation4228.6%52.4%
D16QGD Slav, Steiner variation3528.6%57.1%
E90King's Indian, Zinnowitz variation2828.6%53.6%
B87Sicilian, Sozin with ...a6 and ...b52128.6%61.9%
C84Ruy Lopez, closed, centre attack2128.6%47.6%
A05Reti, King's Indian attack, Spassky's variation2128.6%61.9%
E51Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d51428.6%42.9%
A82Dutch, Staunton gambit1428.6%35.7%
D28QGA, classical, 7.Qe21428.6%28.6%
E07Catalan, closed, 6...Nbd71428.6%50.0%
A89Dutch, Leningrad, main variation with Nc61428.6%42.9%
A83Dutch, Staunton gambit, Chigorin variation728.6%71.4%
C86Ruy Lopez, Worrall attack728.6%57.1%
C52Evans gambit728.6%42.9%
D25QGA, Flohr variation728.6%71.4%
C33KGA, bishop's gambit, Bledow variation728.6%28.6%
C44Inverted Hungarian728.6%28.6%
A97Dutch, Ilyin-Genevsky variation728.6%71.4%
B33Sicilian, Sveshnikov variation728.6%42.9%
E76King's Indian, Four pawns attack, dynamic line728.6%57.1%
D70Neo-Gruenfeld (Kemeri) defence728.6%57.1%
A22English, Bremen, Smyslov system48428.3%47.6%
E16Queen's Indian, Yates variation4628.3%62.0%
A35English, symmetrical, four knights system54928.2%53.5%
E11Bogo-Indian defence24128.2%49.4%
E58Nimzo-Indian, 4.e3, main line with 8...Bxc37128.2%49.3%
C48Four knights, Spanish, classical defence3228.1%42.2%
D27QGA, classical, Rubinstein variation94528.0%53.6%
C42Petrov, classical attack, Jaenisch variation10728.0%57.0%
D30QGD10728.0%44.9%
B10Caro-Kann, Two knights variation7528.0%55.3%
E49Nimzo-Indian, 4.e3, Botvinnik system2528.0%54.0%
D15QGD Slav, Slav gambit2528.0%38.0%
E54Nimzo-Indian, 4.e3, Gligoric system with 7...dc4327.9%51.2%
A36English, ultra-symmetrical variation6127.9%51.6%
C90Ruy Lopez, closed (with ...d6)78127.8%52.6%
A16English opening1827.8%47.2%
C44Dresden opening1827.8%36.1%
B43Sicilian, Kan, 5.Nc313727.7%53.3%
C55Two knights defence (Modern bishop's opening)10127.7%54.5%
D27QGA, classical, 6...a632227.6%53.3%
B14Caro-Kann, Panov-Botvinnik attack, 5...e648527.6%52.4%
B08Pirc, classical, h3 system2927.6%65.5%
C67Ruy Lopez, Berlin defence, open variation29427.6%52.9%
C10French, Paulsen variation20727.5%56.8%
D39QGD, Ragozin, Vienna variation14927.5%46.0%
A07Reti, King's Indian attack, Yugoslav variation49127.5%54.9%
C00French, Schlechter variation9127.5%50.0%
E55Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation59727.5%52.4%
A21English opening20827.4%53.6%
A48King's Indian, East Indian defence13927.3%54.0%
C11French, Burn variation223727.3%52.5%
A30English, symmetrical, hedgehog system113227.3%56.1%
B35Sicilian, accelerated fianchetto, modern variation with Bc49927.3%52.0%
B88Sicilian, Sozin, Leonhardt variation5527.3%39.1%
D12QGD Slav, exchange variation3327.3%50.0%
B70Sicilian, dragon variation3327.3%53.0%
E98King's Indian, orthodox, Aronin-Taimanov, 9.Ne12227.3%68.2%
E16Queen's Indian, Capablanca variation2227.3%63.6%
C75Ruy Lopez, modern Steinitz defence1127.3%68.2%
B06Robatsch defence, Pseudo-Austrian attack1127.3%59.1%
D16QGD Slav, Soultanbeieff variation1127.3%50.0%
E60King's Indian, Anti-Gruenfeld1127.3%68.2%
B83Sicilian, modern Scheveningen, main line1127.3%68.2%
A28English, Bradley Beach variation1127.3%40.9%
E32Nimzo-Indian, classical variation87827.2%51.0%
E00Catalan opening38027.1%52.2%
E12Queen's Indian, 4.Nc348627.0%50.5%
D47QGD semi-Slav, Meran, Wade variation551526.9%53.7%
B10Caro-Kann, anti-anti-Caro-Kann defence26026.9%53.1%
D74Neo-Gruenfeld, 6.cd Nxd5, 7.O-O5226.9%55.8%
B48Sicilian, Taimanov variation40226.9%51.7%
A23English, Bremen system, Keres variation6726.9%49.3%
D38QGD, Ragozin variation41726.9%53.5%
B47Sicilian, Taimanov (Bastrikov) variation98426.8%53.5%
A35English, symmetrical variation4126.8%59.8%
C91Ruy Lopez, closed, Bogolyubov variation127926.8%50.1%
D01Richter-Veresov attack20926.8%48.8%
A46Queen's pawn, Torre attack11226.8%51.8%
C77Ruy Lopez, Anderssen variation5626.8%43.8%
A49King's Indian, fianchetto without c414226.8%50.0%
B54Sicilian, Prins (Moscow) variation7126.8%43.0%
D15QGD Slav, Schlechter variation7126.8%43.0%
B44Sicilian, Szen (`anti-Taimanov') variation15726.8%55.4%
C06French, Tarrasch, closed variation, main line73326.7%51.0%
E94King's Indian, orthodox variation10526.7%61.9%
B91Sicilian, Najdorf, Zagreb (fianchetto) variation3026.7%50.0%
E73King's Indian, Averbakh system1526.7%40.0%
D52QGD1526.7%66.7%
D73Neo-Gruenfeld, 5.Nf313926.6%52.2%
E39Nimzo-Indian, classical, Pirc variation4926.5%54.1%
D05Queen's pawn game32826.5%55.6%
E92King's Indian, Gligoric-Taimanov system8326.5%59.0%
D47QGD semi-Slav, neo-Meran (Lundin variation)21926.5%56.6%
E04Catalan, open, 5.Nf391026.5%50.7%
E65King's Indian, fianchetto, Yugoslav, 7.O-O3426.5%42.6%
B00KP, Nimzovich defence, Bogolyubov variation3426.5%48.5%
C72Ruy Lopez, modern Steinitz defence, 5.O-O3426.5%60.3%
A30English, symmetrical variation119726.4%51.9%
C42Petrov, classical attack23526.4%52.8%
C42Petrov, classical attack, Marshall variation16326.4%53.7%
D34QGD, Tarrasch, Prague variation, Normal position31926.3%60.8%
A22English opening11426.3%48.2%
C88Ruy Lopez, closed, anti-Marshall 8.a43826.3%50.0%
C64Ruy Lopez, classical defence, 4.c33826.3%52.6%
E71King's Indian, Makagonov system (5.h3)1926.3%39.5%
C41Philidor, Hanham, Schlechter variation1926.3%65.8%
B31Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6)17526.3%56.6%
D02Queen's pawn game, Krause variation14126.2%47.2%
E18Queen's Indian, old main line, 7.Nc314126.2%56.4%
D48QGD semi-Slav, Meran10326.2%51.9%
C49Four knights, symmetrical, Metger unpin10326.2%47.1%
D26QGA, 4...e627126.2%47.8%
C78Ruy Lopez, Moeller defence8426.2%51.2%
A25English, closed system27926.2%53.9%
C19French, Winawer, advance, 6...Ne74626.1%50.0%
D93Gruenfeld with Bf4 e34626.1%54.3%
B92Sicilian, Najdorf, Opovcensky variation48726.1%51.2%
C70Ruy Lopez, Classical defence deferred15026.0%52.3%
D44QGD semi-Slav, 5.Bg5 dc5026.0%49.0%
C46Four knights, Italian variation10825.9%50.0%
E62King's Indian, fianchetto, Kavalek (Bronstein) variation8125.9%52.5%
C11French, Steinitz, Boleslavsky variation75525.8%54.0%
A07Reti, King's Indian attack (with ...c5)6225.8%48.4%
B51Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack25225.8%55.0%
B22Sicilian, Alapin's variation (2.c3)88225.7%53.6%
E10Queen's pawn game80525.7%55.1%
D94Gruenfeld, 5.e37025.7%54.3%
E38Nimzo-Indian, classical, 4...c53525.7%55.7%
B13Caro-Kann, Panov-Botvinnik, normal variation3525.7%52.9%
C43Petrov, modern attack, Trifunovic variation3525.7%47.1%
C91Ruy Lopez, closed, 9.d4109725.7%54.1%
A46Queen's pawn, Yusupov-Rubinstein system3925.6%61.5%
B84Sicilian, Scheveningen (Paulsen), classical variation93025.6%50.1%
D28QGA, classical, 7...b54725.5%46.8%
B10Caro-Kann, closed (Breyer) variation14525.5%49.3%
D85Gruenfeld, exchange variation9825.5%42.3%
E42Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein)9825.5%48.5%
A50Queen's pawn game5125.5%57.8%
B90Sicilian, Najdorf, Lipnitzky attack5125.5%48.0%
D30Queen's gambit declined38525.5%54.0%
C50Giuoco Piano, four knights variation5525.5%56.4%
C50Giuoco Pianissimo, Italian four knights variation13025.4%55.8%
D90Gruenfeld, Three knights variation6725.4%53.0%
B45Sicilian, Taimanov variation36325.3%51.0%
E12Queen's Indian, Petrosian system96325.3%54.1%
D10QGD Slav defence16225.3%53.4%
A20English opening144525.3%50.4%
D20Queen's gambit accepted11925.2%48.7%
E11Bogo-Indian defence, Gruenfeld variation15925.2%55.3%
C16French, Winawer, advance variation16725.1%59.3%
D48QGD semi-Slav, Meran, 8...a6111225.1%48.1%
C10French, Rubinstein variation50325.0%49.1%
B76Sicilian, dragon, Yugoslav attack, 7...O-O17225.0%39.8%
D21QGA, 3.Nf310825.0%57.9%
D56QGD, Lasker defence9625.0%49.0%
C65Ruy Lopez, Berlin defence, Beverwijk variation3625.0%40.3%
B52Sicilian, Canal-Sokolsky attack, Bronstein gambit2825.0%37.5%
D17QGD Slav, Czech defence2825.0%66.1%
C12French, MacCutcheon variation2425.0%58.3%
A54Old Indian, Ukrainian variation, 4.Nf32025.0%67.5%
D63QGD, Orthodox defence, Swiss (Henneberger) variation2025.0%57.5%
A17English opening2025.0%67.5%
C00French, Pelikan variation1625.0%31.3%
C02French, advance, Milner-Barry gambit1625.0%62.5%
B85Sicilian, Scheveningen, classical main line1225.0%54.2%
E24Nimzo-Indian, Saemisch variation1225.0%37.5%
B19Caro-Kann, classical, 7...Nd71225.0%54.2%
D56QGD, Lasker defence, Teichmann variation1225.0%79.2%
B42Sicilian, Kan, Swiss cheese variation1225.0%79.2%
B25Sicilian, closed1225.0%54.2%
C70Ruy Lopez1225.0%37.5%
E20Nimzo-Indian defence1225.0%62.5%
E29Nimzo-Indian, Saemisch, main line825.0%37.5%
D52QGD, Cambridge Springs defence825.0%62.5%
E45Nimzo-Indian, 4.e3, Bronstein (Byrne) variation825.0%50.0%
D57QGD, Lasker defence, main line825.0%50.0%
E32Nimzo-Indian, classical, Adorjan gambit825.0%62.5%
A61Benoni, Uhlmann variation825.0%62.5%
D94Gruenfeld, Makogonov variation825.0%37.5%
D14QGD Slav, exchange, Trifunovic variation825.0%62.5%
B23Sicilian, closed, Korchnoi variation825.0%37.5%
C45Scotch, Pulling counter-attack825.0%37.5%
D51QGD, 4.Bg5 Nbd7825.0%25.0%
B62Sicilian, Richter-Rauzer, Podvebrady variation425.0%37.5%
C43Petrov, modern attack, Steinitz variation425.0%37.5%
D95Gruenfeld, Botvinnik variation425.0%62.5%
E93King's Indian, Petrosian system, main line425.0%62.5%
C29Vienna gambit, Paulsen attack425.0%37.5%
C24Bishop's opening, Urusov gambit425.0%37.5%
A86Dutch, Leningrad variation425.0%87.5%
C45Scotch, Romanishin variation425.0%62.5%
B29Sicilian, Nimzovich-Rubinstein; Rubinstein counter-gambit425.0%37.5%
B10Caro-Kann, Goldman (Spielmann) variation425.0%37.5%
E46Nimzo-Indian, 4.e3 O-O425.0%37.5%
A09Reti accepted, Keres variation425.0%62.5%
A56Czech Benoni, King's Indian system425.0%87.5%
A57Benko gambit, Zaitsev system425.0%37.5%
E77King's Indian, Four pawns attack425.0%62.5%
C45Scotch, Blackburne attack425.0%37.5%
C58Two knights defence, Paoli variation425.0%62.5%
E16Queen's Indian, Riumin variation425.0%62.5%
B53Sicilian, Chekhover, Zaitsev variation425.0%37.5%
C49Four knights, Janowski variation425.0%37.5%
C21Centre game425.0%62.5%
C33KGA, Villemson (Steinitz) gambit425.0%12.5%
C33KGA, bishop's gambit, Paulsen attack425.0%37.5%
D41QGD, Semi-Tarrasch, Kmoch variation425.0%87.5%
A52Budapest, Alekhine, Abonyi variation425.0%87.5%
A00Benko's opening, reversed Alekhine425.0%12.5%
B17Caro-Kann, Steinitz variation134125.0%54.1%
E15Queen's Indian, Nimzovich variation (exaggerated fianchetto)455225.0%54.4%
A80Dutch20524.9%52.9%
A45Queen's pawn game46324.8%52.4%
A48King's Indian, London system14124.8%55.0%
D13QGD Slav, exchange variation17424.7%52.6%
D25QGA, Janowsky-Larsen variation8124.7%50.6%
D42QGD, Semi-Tarrasch, 7.Bd37724.7%50.0%
A81Dutch defence22324.7%59.9%
B19Caro-Kann, classical, Spassky variation154524.7%60.3%
D31QGD, semi-Slav7324.7%52.1%
A22English, Carls' Bremen system6924.6%38.4%
A53Old Indian defence17924.6%49.2%
E35Nimzo-Indian, classical, Noa variation, 5.cd ed5724.6%47.4%
D34QGD, Tarrasch, Prague variation, 9.Bg55724.6%64.9%
E92King's Indian, Petrosian system, Stein variation11024.5%50.5%
B14Caro-Kann, Panov-Botvinnik attack, 5...g65324.5%51.9%
B18Caro-Kann, classical, 6.h420024.5%59.3%
E01Catalan, closed4924.5%51.0%
B82Sicilian, Scheveningen, 6.f44924.5%49.0%
E68King's Indian, fianchetto, classical variation, 8.e433124.5%53.6%
A34English, symmetrical, three knights system22524.4%54.4%
D97Gruenfeld, Russian, Alekhine (Hungarian) variation67724.4%59.9%
A01Nimzovich-Larsen attack, modern variation23024.3%50.9%
B07Pirc defence11524.3%55.7%
C78Ruy Lopez, 5.O-O12824.2%50.4%
C50Giuoco Pianissimo22324.2%49.8%
E15Queen's Indian, 4.g3 Bb76224.2%52.4%
D35QGD, exchange, Saemisch variation2924.1%63.8%
B04Alekhine's defence, modern, fianchetto variation2924.1%53.4%
D92Gruenfeld, 5.Bf410824.1%54.6%
C41Philidor's defence5424.1%63.9%
B28Sicilian, O'Kelly variation7924.1%58.9%
B00KP, Nimzovich defence10424.0%57.2%
C01French, exchange variation42924.0%54.7%
D45QGD semi-Slav, Stoltz variation157524.0%52.1%
E67King's Indian, fianchetto, classical variation7524.0%54.7%
D30QGD, Vienna variation2524.0%64.0%
A88Dutch, Leningrad, main variation with c64623.9%42.4%
A25English, closed, 5.Rb16723.9%49.3%
B10Caro-Kann defence37723.9%54.6%
D29QGA, classical, 8...Bb717623.9%48.3%
C19French, Winawer, advance, positional main line74723.8%55.3%
E14Queen's Indian, 4.e327723.8%52.3%
D17QGD Slav, Wiesbaden variation14723.8%50.7%
D24QGA, 4.Nc34223.8%57.1%
B16Caro-Kann, Bronstein-Larsen variation2123.8%64.3%
C53Giuoco Piano, Bird's attack2123.8%40.5%
C77Ruy Lopez, Wormald (Alapin) attack2123.8%59.5%
D02Queen's pawn game, Chigorin variation26523.8%54.5%
B46Sicilian, Taimanov variation60723.7%55.5%
E60King's Indian, 3.g314823.6%51.7%
D37QGD, 4.Nf390723.6%56.2%
C90Ruy Lopez, closed, Pilnik variation103523.6%53.4%
B01Scandinavian defence14023.6%49.6%
D03Torre attack (Tartakower variation)20423.5%53.9%
C42Petrov, classical attack, close variation5123.5%62.7%
A15English, 1...Nf6 (Anglo-Indian defense)5123.5%58.8%
A57Benko gambit half accepted3423.5%50.0%
D08QGD, Albin counter-gambit3423.5%41.2%
E95King's Indian, orthodox, 7...Nbd7, 8.Re13423.5%44.1%
D80Gruenfeld, Stockholm variation3423.5%41.2%
C46Four knights, Gunsberg variation1723.5%58.8%
B57Sicilian, Sozin, not Scheveningen1723.5%47.1%
B40Sicilian, Anderssen variation11123.4%51.4%
C00French defence, Steiner variation15823.4%53.5%
B44Sicilian defence9423.4%43.6%
D44QGD semi-Slav, Botvinnik system (anti-Meran)4723.4%45.7%
B50Sicilian50123.4%54.8%
D96Gruenfeld, Russian variation3023.3%55.0%
B25Sicilian, closed, 6.f4 e5 (Botvinnik)3023.3%48.3%
D91Gruenfeld, 5.Bg517223.3%54.1%
C46Three knights, Steinitz variation4323.3%55.8%
D78Neo-Gruenfeld, 6.O-O c614223.2%53.2%
D31QGD, Charousek (Petrosian) variation12123.1%51.2%
A28English, four knights system6523.1%65.4%
D05Queen's pawn game, Rubinstein (Colle-Zukertort) variation2623.1%73.1%
A45Blackmar-Diemer gambit1323.1%50.0%
C71Ruy Lopez, modern Steinitz defence, Duras (Keres) variation1323.1%57.7%
C45Scotch, Horwitz attack1323.1%42.3%
D29QGA, classical, Smyslov variation1323.1%57.7%
D94Gruenfeld, Smyslov defence1323.1%42.3%
E76King's Indian, Four pawns attack1323.1%57.7%
D27QGA, classical, Geller variation1323.1%42.3%
B21Sicilian, Grand Prix attack12623.0%41.7%
D45QGD semi-Slav, 5.e314422.9%58.0%
B32Sicilian defence4822.9%61.5%
C03French, Tarrasch37122.9%53.8%
B30Sicilian defence39822.9%51.4%
C92Ruy Lopez, closed, 9.h33522.9%57.1%
A28English, four knights, 4.e313622.8%50.4%
B13Caro-Kann, Panov-Botvinnik attack18022.8%54.7%
C46Four knights game16722.8%54.5%
D20QGA, 3.e446622.7%56.7%
D02Queen's bishop game53222.7%50.5%
D17QGD Slav, Krause attack6622.7%58.3%
D61QGD, Orthodox defence, Rubinstein variation4422.7%50.0%
E43Nimzo-Indian, Fischer variation2222.7%56.8%
B62Sicilian, Richter-Rauzer, 6...e62222.7%34.1%
E62King's Indian, fianchetto with ...Nc62222.7%43.2%
C40QP counter-gambit (elephant gambit)2222.7%56.8%
B90Sicilian, Najdorf, Byrne (English) attack319622.7%50.7%
E60King's Indian, 3.Nf360822.7%55.6%
A15English opening52922.7%53.9%
C17French, Winawer, advance, 5.a315022.7%53.3%
D30QGD, Hastings variation7522.7%46.0%
B40Sicilian defence80322.7%52.4%
A00Benko's opening69322.7%51.4%
C42Petrov's defence26522.6%57.0%
D41QGD, Semi-Tarrasch, San Sebastian variation5322.6%67.9%
A13English opening24322.6%49.2%
B12Caro-Kann, advance variation109322.6%51.7%
C20Alapin's opening3122.6%46.8%
D11QGD Slav, 4.e319522.6%50.3%
B90Sicilian, Najdorf19122.5%51.6%
D12QGD Slav, 4.e3 Bf540022.5%56.0%
C14French, classical, Steinitz variation20022.5%55.8%
E87King's Indian, Saemisch, orthodox, 7.d58022.5%62.5%
B15Caro-Kann, Gurgenidze system9822.4%55.1%
D55QGD, Neo-orthodox variation, 7.Bh44922.4%66.3%
A06Reti opening50022.4%58.2%
B38Sicilian, accelerated fianchetto, Maroczy bind, 6.Be36722.4%57.5%
A40Queen's pawn22022.3%49.3%
D04Queen's pawn game27422.3%52.0%
C45Scotch game30122.3%49.3%
A25English, Sicilian reversed12622.2%53.2%
C00French, Chigorin variation8122.2%53.1%
D32QGD, Tarrasch defence6322.2%52.4%
B93Sicilian, Najdorf, 6.f45422.2%48.1%
C43Petrov, modern (Steinitz) attack4522.2%62.2%
A13English, Neo-Catalan accepted3622.2%66.7%
C48Four knights, Rubinstein counter-gambit, exchange variation3622.2%47.2%
A52Budapest, Rubinstein variation3622.2%58.3%
D26QGA, classical variation, 6.O-O2722.2%40.7%
A36English, symmetrical variation2722.2%44.4%
C80Ruy Lopez, open, Bernstein variation1822.2%55.6%
C47Four knights, Scotch, Krause variation1822.2%72.2%
A32English, symmetrical variation1822.2%50.0%
C67Ruy Lopez, open Berlin defence, l'Hermet variation922.2%55.6%
C74Ruy Lopez, Siesta, Kopayev variation922.2%33.3%
C49Four knights, symmetrical, Pillsbury variation922.2%44.4%
C57Two knights defence, Ulvestad variation922.2%44.4%
E62King's Indian, fianchetto, Simagin variation922.2%88.9%
E53Nimzo-Indian, 4.e3, Keres variation922.2%44.4%
B20Sicilian defence15822.2%48.4%
B56Sicilian24422.1%55.3%
D02Queen's pawn game194222.1%52.8%
A06Reti, Nimzovich-Larsen attack31722.1%52.4%
C19French, Winawer, advance, poisoned pawn variation163122.1%60.7%
B23Sicilian, closed22722.0%53.3%
D45QGD semi-Slav, accelerated Meran (Alekhine variation)30022.0%53.3%
A46Queen's pawn game37322.0%52.8%
B12Caro-Kann defence27322.0%57.5%
C19French, Winawer, advance, poisoned pawn, Konstantinopolsky variation30522.0%59.5%
D26QGA, classical variation18721.9%54.8%
A39English, symmetrical, main line with d47321.9%54.8%
C45Scotch, Schmidt variation16021.9%50.3%
E52Nimzo-Indian, 4.e3, main line with ...b63221.9%48.4%
E63King's Indian, fianchetto, Panno variation37521.9%53.9%
D25QGA, 4.e38721.8%58.0%
A05Reti opening62421.8%51.4%
E91King's Indian, 6.Be210121.8%58.4%
E19Queen's Indian, old main line, 9.Qxc314721.8%57.1%
D19QGD Slav, Dutch variation69421.8%58.1%
B24Sicilian, closed6921.7%47.1%
A41Old Indian, Tartakower (Wade) variation6921.7%54.3%
B60Sicilian, Richter-Rauzer, Larsen variation2321.7%45.7%
A56Benoni defence6021.7%54.2%
D98Gruenfeld, Russian, Smyslov variation3721.6%54.1%
D10QGD Slav, Winawer counter-gambit3721.6%56.8%
E91King's Indian, Kazakh variation3721.6%64.9%
A42Pterodactyl defence3721.6%51.4%
D43QGD semi-Slav90321.6%50.0%
D86Gruenfeld, exchange, classical variation7921.5%48.7%
E81King's Indian, Saemisch, 5...O-O7921.5%51.3%
C18French, Winawer, classical variation12121.5%54.5%
A07Reti, King's Indian attack (Barcza system)80721.4%50.4%
A00Dunst (Sleipner, Heinrichsen) opening16821.4%51.2%
D35QGD, exchange variation5621.4%42.9%
E62King's Indian, fianchetto, Larsen system2821.4%71.4%
B58Sicilian, Boleslavsky variation2821.4%53.6%
E10Blumenfeld counter-gambit accepted1421.4%39.3%
B74Sicilian, dragon, classical, 9.Nb31421.4%53.6%
D90Gruenfeld, Flohr variation1421.4%60.7%
A33English, symmetrical, Geller variation34621.4%54.3%
A84Dutch defence15021.3%53.3%
C53Giuoco Piano26321.3%52.9%
B49Sicilian, Taimanov variation18821.3%57.4%
A80Dutch, 2.Bg5 variation4721.3%44.7%
B42Sicilian, Kan, 5.Bd314621.2%50.3%
C45Scotch, Potter variation3321.2%50.0%
D14QGD Slav, exchange variation, 6.Bf4 Bf511821.2%56.4%
A13English, Wimpey system5221.2%51.0%
A26English, Botvinnik system7121.1%47.2%
D47QGD semi-Slav, Meran variation16121.1%55.3%
C10French, Fort Knox variation10921.1%51.8%
D11QGD Slav, 3.Nf341321.1%54.4%
B42Sicilian, Kan, Polugaievsky variation7621.1%46.1%
B41Sicilian, Kan, Maroczy bind (Reti variation)3821.1%63.2%
B82Sicilian, Scheveningen, Tal variation1921.1%73.7%
C68Ruy Lopez, exchange, Alekhine variation1921.1%47.4%
A37English, symmetrical, Botvinnik system reversed8121.0%51.2%
B83Sicilian, modern Scheveningen12421.0%47.6%
E66King's Indian, fianchetto, Yugoslav Panno10521.0%55.2%
B57Sicilian, Sozin, Benko variation10521.0%47.6%
C05French, Tarrasch, closed variation25820.9%55.8%
B13Caro-Kann, exchange variation12920.9%54.7%
B30Sicilian, Nimzovich-Rossolimo attack (without ...d6)23920.9%54.4%
A13English, Neo-Catalan6720.9%58.2%
C00French defence52720.9%56.5%
D00Levitsky attack (Queen's bishop attack)26420.8%47.5%
B08Pirc, classical (two knights) system7220.8%47.9%
D31QGD, 3.Nc37220.8%53.5%
C22Centre game, Berger variation2420.8%52.1%
E00Queen's pawn game10620.8%50.9%
D66QGD, Orthodox defence, Bd3 line5320.8%55.7%
D46QGD semi-Slav, Chigorin defence13520.7%52.6%
C30KGD, classical variation2920.7%55.2%
A04Reti opening85120.7%52.9%
E97King's Indian, orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)87620.7%57.4%
A31English, symmetrical, Benoni formation33920.6%51.9%
B54Sicilian12620.6%50.0%
E20Nimzo-Indian, Kmoch variation6320.6%51.6%
E11Bogo-Indian defence, Nimzovich variation30620.6%58.3%
A70Benoni, classical with e4 and Nf33420.6%57.4%
B07Robatsch defence, Geller's system3420.6%66.2%
B66Sicilian, Richter-Rauzer, Rauzer attack, 7...a6280820.6%47.9%
A43Old Benoni defence10720.6%56.1%
C62Ruy Lopez, old Steinitz defence3920.5%46.2%
B80Sicilian, Scheveningen, English variation3920.5%43.6%
D45QGD semi-Slav, 5...Nd716620.5%49.4%
B81Sicilian, Scheveningen, Keres attack31820.4%53.3%
B76Sicilian, dragon, Yugoslav attack, Rauser variation10820.4%62.0%
A48King's Indian, Torre attack11820.3%48.3%
D44QGD semi-Slav, anti-Meran gambit30020.3%56.5%
C00Lengfellner system6420.3%60.2%
C42Petrov three knights game7920.3%60.8%
B33Sicilian, Pelikan, Chelyabinsk variation9920.2%52.5%
B00King's pawn opening13920.1%52.5%
B03Alekhine's defence18420.1%53.0%
D00Queen's pawn, Chigorin variation56720.1%52.7%
A13English opening, Agincourt variation14020.0%42.9%
C03French, Tarrasch, Guimard variation5020.0%60.0%
A55Old Indian, main line4020.0%52.5%
B09Pirc, Austrian attack3520.0%38.6%
C42Petrov, Paulsen attack2520.0%50.0%
D22QGA, Alekhine defence2020.0%45.0%
D10QGD Slav defence, Alekhine variation2020.0%55.0%
D07QGD, Chigorin defence, Janowski variation1520.0%63.3%
B05Alekhine's defence, modern, Flohr variation1520.0%50.0%
D05Queen's pawn game, Zukertort variation1520.0%56.7%
E44Nimzo-Indian, Fischer variation, 5.Ne21520.0%56.7%
C65Ruy Lopez, Berlin defence, 4.O-O1020.0%70.0%
C70Ruy Lopez, Taimanov (chase/wing/accelerated counterthrust) variation1020.0%50.0%
C14French, classical variation1020.0%30.0%
B12Caro-Masi defence1020.0%50.0%
D63QGD, Orthodox defence1020.0%60.0%
A41Robatsch defence, Rossolimo variation1020.0%70.0%
A28English, four knights, Stean variation1020.0%60.0%
C34KGA, Schallop defence1020.0%50.0%
C82Ruy Lopez, open, Italian variation1020.0%70.0%
D60QGD, Orthodox defence, Botvinnik variation1020.0%40.0%
C70Ruy Lopez, Caro variation520.0%70.0%
D65QGD, Orthodox defence, Rubinstein attack, main line520.0%30.0%
C33KGA, Lesser bishop's (Petroff-Jaenisch-Tartakower) gambit520.0%70.0%
A18English, Mikenas-Carls, Flohr variation520.0%70.0%
A14English, Neo-Catalan declined520.0%30.0%
E26Nimzo-Indian, Saemisch variation520.0%50.0%
D59QGD, Tartakower variation520.0%30.0%
C27Vienna, Alekhine variation520.0%50.0%
A13English, Romanishin gambit520.0%90.0%
C90Ruy Lopez, closed, Suetin variation520.0%90.0%
A53Old Indian, Janowski variation520.0%70.0%
A58Benko gambit, fianchetto variation520.0%70.0%
C48Four knights, Rubinstein counter-gambit, 5.Be2520.0%50.0%
C37KGA, Blachly gambit520.0%70.0%
C33KGA, Breyer gambit520.0%10.0%
D33QGD, Tarrasch, Schlechter-Rubinstein system520.0%50.0%
C57Two knights defence, Fegatello attack520.0%30.0%
C41Philidor, Nimzovich variation520.0%70.0%
C26Vienna, Falkbeer variation520.0%70.0%
D52QGD, Cambridge Springs defence, Argentine variation520.0%50.0%
C24Bishop's opening, Urusov gambit, Panov variation520.0%50.0%
C41Philidor, Steinitz variation520.0%70.0%
C02French, advance variation37119.9%55.5%
B20Sicilian, Steinitz variation8119.8%51.9%
B67Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 8...Bd727419.7%50.0%
D15QGD Slav, 4.Nc333619.6%54.5%
A37English, symmetrical variation5119.6%62.7%
C23Bishop's opening5119.6%47.1%
B18Caro-Kann, classical variation13819.6%52.5%
B01Scandinavian gambit4619.6%40.2%
C20King's pawn game4619.6%62.0%
B12Caro-Kann, 3.Nd28219.5%56.1%
C50Giuoco Pianissimo, Canal variation4119.5%41.5%
A09Reti accepted4119.5%65.9%
B97Sicilian, Najdorf, 7...Qb614919.5%44.6%
C48Four knights, Rubinstein counter-gambit26819.4%57.5%
B97Sicilian, Najdorf, Poisoned pawn variation39719.4%44.2%
C41Philidor, exchange variation6219.4%50.0%
B09Pirc, Austrian attack, 6.Bd33119.4%61.3%
A58Benko gambit accepted3119.4%51.6%
D41QGD, Semi-Tarrasch with e33119.4%48.4%
E21Nimzo-Indian, three knights variation18119.3%52.8%
A10English opening41419.3%55.6%
B01Scandinavian (centre counter) defence21319.2%61.7%
B10Caro-Kann, anti-Caro-Kann defence18219.2%51.9%
C00St. George defence5219.2%55.8%
C24Bishop's opening, Berlin defence9919.2%53.0%
D07QGD, Chigorin defence17219.2%57.8%
B15Caro-Kann defence12019.2%48.8%
A90Dutch defence12019.2%57.1%
E17Queen's Indian, old main line, 6.O-O4719.1%52.1%
B06Robatsch (modern) defence20419.1%56.1%
C97Ruy Lopez, closed, Chigorin defence4219.0%59.5%
D06QGD, Grau (Sahovic) defence4219.0%57.1%
A85Dutch with c4 & Nc32119.0%61.9%
E53Nimzo-Indian, 4.e3, main line with ...c52119.0%61.9%
C12French, MacCutcheon, Janowski variation2119.0%76.2%
C11French, Steinitz variation24719.0%48.4%
A08Reti, King's Indian attack10019.0%47.5%
B11Caro-Kann, Two knights, 3...Bg410019.0%49.5%
B23Sicilian, closed, 2...Nc613719.0%50.4%
D00Queen's pawn, Mason variation32719.0%53.5%
E20Nimzo-Indian, Romanishin-Kasparov (Steiner) system7418.9%43.2%
B98Sicilian, Najdorf variation3718.9%33.8%
D46QGD semi-Slav, Romih variation3718.9%63.5%
C00French, King's Indian attack18018.9%50.6%
A34English, symmetrical variation21818.8%47.5%
C12French, MacCutcheon, Lasker variation, 8...g622418.8%49.6%
B80Sicilian, Scheveningen, fianchetto variation3218.8%46.9%
C11French, Swiss variation3218.8%43.8%
A12English, Caro-Kann defensive system1618.8%53.1%
B32Sicilian, Labourdonnais-Loewenthal variation1618.8%78.1%
D24QGA, Bogolyubov variation1618.8%34.4%
D09QGD, Albin counter-gambit, 5.g32718.5%57.4%
B04Alekhine's defence, modern variation2718.5%53.7%
C36KGA, Abbazia defence, modern variation2718.5%38.9%
C27Vienna game2718.5%42.6%
C17French, Winawer, advance variation2718.5%50.0%
B80Sicilian, Scheveningen variation10318.4%50.0%
D00Queen's pawn, Mason variation, Steinitz counter-gambit3818.4%43.4%
A05Reti, King's Indian attack4918.4%58.2%
C88Ruy Lopez, closed4918.4%41.8%
C25Vienna game6018.3%47.5%
B89Sicilian, Velimirovic attack8218.3%43.3%
E90King's Indian, 5.Nf37718.2%51.9%
E12Queen's Indian, Miles variation6618.2%53.0%
A01Nimzovich-Larsen attack5518.2%50.9%
E60King's Indian defence4418.2%50.0%
C77Ruy Lopez, Morphy defence3318.2%54.5%
C44Scotch, Goering gambit3318.2%48.5%
E92King's Indian, Andersson variation2218.2%40.9%
B02Alekhine's defence, Scandinavian variation1118.2%54.5%
C51Evans gambit, Cordel variation1118.2%45.5%
D20QGA, Linares variation1118.2%45.5%
C45Scotch, Steinitz variation1118.2%72.7%
E22Nimzo-Indian, Spielmann variation1118.2%36.4%
C44Scotch, Relfsson gambit ('MacLopez')1118.2%36.4%
C11French defence10518.1%39.5%
D55QGD, 6.Nf33917.9%67.9%
A09Reti, advance variation8417.9%54.2%
D33QGD, Tarrasch, Prague variation2817.9%51.8%
D52QGD, Cambridge Springs defence, Bogoljubow variation9017.8%52.2%
E08Catalan, closed, Qc2 & b34517.8%46.7%
C46Three knights game4517.8%53.3%
C48Four knights, Spanish variation6217.7%50.8%
A40Modern defence7917.7%57.0%
C02French, advance, Paulsen attack25417.7%53.3%
C04French, Tarrasch, Guimard main line5117.6%57.8%
E62King's Indian, fianchetto, Uhlmann (Szabo) variation1717.6%61.8%
E94King's Indian, orthodox, Donner variation1717.6%50.0%
D31QGD, semi-Slav, Marshall gambit14817.6%52.0%
A01Nimzovich-Larsen attack, Indian variation8017.5%51.3%
A45Paleface attack4017.5%36.3%
A07Reti, King's Indian attack9217.4%57.6%
C50King's pawn game6917.4%58.0%
A61Benoni defence4617.4%63.0%
B99Sicilian, Najdorf, 7...Be7 main line2317.4%60.9%
E10Blumenfeld counter-gambit2317.4%60.9%
C00French, Reti (Spielmann) variation5217.3%54.8%
E41Nimzo-Indian, 4.e3 c53517.1%48.6%
B27Sicilian, Hungarian variation17617.0%54.5%
A47Queen's Indian defence4717.0%53.2%
E00Neo-Indian (Seirawan) attack5317.0%50.0%
B23Sicilian, Grand Prix attack5317.0%55.7%
D30QGD, Capablanca-Duras variation5916.9%52.5%
C02French, advance, Euwe variation19516.9%50.5%
B63Sicilian, Richter-Rauzer, Rauzer attack, 7...Be715416.9%55.2%
B89Sicilian, Sozin, 7.Be319816.7%53.8%
B01Scandinavian, Marshall variation6616.7%50.8%
B26Sicilian, closed, 6.Be33016.7%55.0%
A87Dutch, Leningrad, main variation3016.7%41.7%
E10Dzindzikhashvili defence2416.7%45.8%
A40Queen's pawn, Lundin (Kevitz-Mikenas) defence2416.7%58.3%
D15QGD Slav, 5.e3 (Alekhine variation)2416.7%45.8%
A93Dutch, stonewall, Botwinnik variation2416.7%70.8%
A96Dutch, classical variation2416.7%54.2%
E40Nimzo-Indian, 4.e32416.7%62.5%
D60QGD, Orthodox defence1816.7%47.2%
C57Two knights defence1816.7%30.6%
B63Sicilian, Richter-Rauzer, Rauzer attack1816.7%41.7%
D55QGD, Neo-orthodox variation, 7.Bxf61816.7%63.9%
C29Vienna gambit1216.7%58.3%
C13French, Albin-Alekhine-Chatard attack1216.7%66.7%
E86King's Indian, Saemisch, orthodox, 7.Nge2 c61216.7%66.7%
C20KP, Indian opening1216.7%25.0%
E90King's Indian, Larsen variation1216.7%50.0%
C89Ruy Lopez, Marshall, main line, 12.d2d41216.7%41.7%
C49Four knights1216.7%58.3%
C10French, Frere (Becker) variation1216.7%58.3%
B13Caro-Kann, Panov-Botvinnik, Herzog defence616.7%41.7%
B60Sicilian, Richter-Rauzer, Bondarevsky variation616.7%58.3%
C68Ruy Lopez, exchange, Romanovsky variation616.7%25.0%
B15Caro-Kann, Alekhine gambit616.7%58.3%
A24English, Bremen system with ...g6616.7%58.3%
C12French, MacCutcheon, Dr. Olland (Dutch) variation616.7%41.7%
E70King's Indian, Kramer system616.7%58.3%
B56Sicilian, Venice attack616.7%75.0%
E73King's Indian, 5.Be2616.7%58.3%
E25Nimzo-Indian, Saemisch, Romanovsky variation616.7%41.7%
C41Philidor, Boden variation616.7%58.3%
E60Queen's pawn, Mengarini attack616.7%75.0%
A00Lasker simul special616.7%58.3%
A12English, London defensive system616.7%25.0%
C31KGD, Falkbeer counter-gambit616.7%41.7%
C24Bishop's opening, Ponziani gambit616.7%75.0%
C26Vienna, Mengarini variation616.7%91.7%
D16QGD Slav, Smyslov variation616.7%41.7%
C44Ponziani, Caro variation616.7%41.7%
E15Queen's Indian, 4.g37316.4%52.1%
D49QGD semi-Slav, Meran, Blumenfeld variation4316.3%47.7%
E62King's Indian, fianchetto, lesser Simagin (Spassky) variation3716.2%56.8%
C79Ruy Lopez, Steinitz defence deferred (Russian defence)3716.2%54.1%
C15French, Winawer, Alekhine (Maroczy) gambit5616.1%59.8%
B03Alekhine's defence, exchange variation2516.0%56.0%
C64Ruy Lopez, classical (Cordel) defence2516.0%64.0%
B01Scandinavian, Pytel-Wade variation2516.0%60.0%
B23Sicilian, chameleon variation2516.0%40.0%
B07Pirc, Byrne variation2516.0%52.0%
A56Benoni defence, Hromodka system33216.0%59.8%
D00Queen's pawn game20715.9%53.9%
D23QGA, Mannheim variation4415.9%55.7%
B73Sicilian, dragon, classical, 8.O-O1915.8%55.3%
A83Dutch, Staunton gambit, Staunton's line1915.8%39.5%
A45Trompovsky attack (Ruth, Opovcensky opening)24115.8%52.3%
D52QGD, Cambridge Springs defence, Yugoslav variation5115.7%56.9%
E61King's Indian defence, 3.Nc39615.6%52.6%
A10English, Anglo-Dutch defense8415.5%60.1%
A01Nimzovich-Larsen attack, symmetrical variation2615.4%57.7%
E25Nimzo-Indian, Saemisch variation1315.4%61.5%
C33KGA, bishop's gambit, Jaenisch variation1315.4%46.2%
D70Neo-Gruenfeld defence1315.4%61.5%
A13English, Kurajica defence1315.4%53.8%
A86Dutch with c4 & g31315.4%69.2%
A26English, closed system3315.2%43.9%
E64King's Indian, fianchetto, Yugoslav system4015.0%60.0%
B06Robatsch defence2015.0%62.5%
C30King's gambit2015.0%62.5%
C57Two knights defence, Wilkes Barre (Traxler) variation2015.0%57.5%
B72Sicilian, dragon, 6.Be32015.0%47.5%
C00French, Labourdonnais variation4714.9%54.3%
A04Reti v Dutch21514.9%62.3%
D35QGD, exchange, positional line10114.9%43.1%
C41Philidor, Improved Hanham variation10114.9%44.1%
E25Nimzo-Indian, Saemisch, Keres variation2714.8%40.7%
B20Sicilian, Keres variation (2.Ne2)3414.7%39.7%
B25Sicilian, closed, 6.f43414.7%42.6%
E07Catalan, closed, Botvinnik variation3414.7%72.1%
A02Bird's opening4114.6%48.8%
E41Nimzo-Indian, e3, Huebner variation4814.6%38.5%
B07Pirc, Ufimtsev-Pytel variation7714.3%56.5%
A28English, four knights, Capablanca variation5614.3%60.7%
C26Vienna game5614.3%50.0%
B21Sicilian, Smith-Morra gambit4914.3%52.0%
A57Benko gambit4214.3%47.6%
C69Ruy Lopez, exchange variation, 5.O-O3514.3%47.1%
B04Alekhine's defence, modern, Larsen variation2114.3%40.5%
D40QGD, Semi-Tarrasch, symmetrical variation1414.3%28.6%
B86Sicilian, Sozin attack1414.3%28.6%
A51Budapest, Fajarowicz variation1414.3%78.6%
C54Giuoco Piano1414.3%42.9%
B65Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9...Nxd41414.3%50.0%
C39KGA, Kieseritsky, Berlin defence, 6.Bc41414.3%50.0%
A42Modern defence, Averbakh system714.3%64.3%
B34Sicilian, accelerated fianchetto, exchange variation714.3%64.3%
C05French, Tarrasch, Botvinnik variation714.3%78.6%
D15QGD Slav accepted714.3%64.3%
A90Dutch defence, Dutch-Indian (Nimzo-Dutch) variation714.3%78.6%
C44Scotch gambit714.3%35.7%
D52QGD, Cambridge Springs defence, Rubinstein variation714.3%64.3%
C51Evans gambit, normal variation714.3%50.0%
B58Sicilian, Boleslavsky, Louma variation714.3%50.0%
C18French, Winawer, advance variation714.3%35.7%
E31Nimzo-Indian, Leningrad, main line714.3%64.3%
C59Two knights defence5014.0%53.0%
C87Ruy Lopez, closed, Averbach variation4314.0%51.2%
C00French, Two knights variation3613.9%54.2%
A41Queen's Pawn11613.8%50.0%
E33Nimzo-Indian, classical, Milner-Barry (Zurich) variation2913.8%65.5%
A20English, Nimzovich, Flohr variation5113.7%48.0%
E30Nimzo-Indian, Leningrad variation4413.6%45.5%
D44QGD semi-Slav, anti-Meran, Alatortsev system2213.6%61.4%
D34QGD, Tarrasch, Prague variation, 7...Be75213.5%68.3%
E56Nimzo-Indian, 4.e3, main line with 7...Nc61513.3%40.0%
B27Sicilian, Katalimov variation1513.3%80.0%
C23Bishop's opening, Classical variation1513.3%40.0%
B07Pirc, 150 attack1513.3%73.3%
A01Nimzovich-Larsen attack, Dutch variation1513.3%40.0%
B34Sicilian, accelerated fianchetto, modern variation6113.1%54.1%
D49QGD semi-Slav, Meran, Sozin variation2313.0%23.9%
A40Queen's pawn, Keres defence6212.9%59.7%
A03Bird's opening3912.8%44.9%
A41Old Indian defence5512.7%59.1%
D16QGD Slav accepted, Alapin variation2412.5%64.6%
C77Ruy Lopez, four knights (Tarrasch) variation2412.5%64.6%
C63Ruy Lopez, Schliemann defence, Berger variation2412.5%47.9%
C88Ruy Lopez, Trajkovic counter-attack1612.5%37.5%
A02Bird's opening, Swiss gambit812.5%56.3%
B40Sicilian, Marshall variation812.5%43.8%
A44Semi-Benoni (`blockade variation')812.5%31.3%
A92Dutch, stonewall with Nc3812.5%43.8%
D66QGD, Orthodox defence, Bd3 line, fianchetto variation812.5%68.8%
B55Sicilian, Prins variation, Venice attack812.5%43.8%
B77Sicilian, dragon, Yugoslav attack, 9.Bc4812.5%56.3%
E92King's Indian, Petrosian system812.5%43.8%
D94Gruenfeld, Opovcensky variation812.5%43.8%
C15French, Winawer, Alekhine gambit, Kan variation2512.0%42.0%
C89Ruy Lopez, Marshall counter-attack2512.0%50.0%
A00Saragossa opening6711.9%47.8%
B33Sicilian, Pelikan (Lasker/Sveshnikov) variation3411.8%58.8%
C30KGD, Mafia defence1711.8%76.5%
C61Ruy Lopez, Bird's defence1711.8%58.8%
B02Alekhine's defence1711.8%47.1%
D48QGD semi-Slav, Meran, Reynolds' variation2611.5%71.2%
C47Four knights, Belgrade gambit2711.1%46.3%
A19English, Mikenas-Carls, Sicilian variation2711.1%42.6%
D30QGD, Capablanca variation1811.1%50.0%
E40Nimzo-Indian, 4.e3, Taimanov variation1811.1%38.9%
D50QGD, Semi-Tarrasch, Primitive Pillsbury variation911.1%16.7%
C42Petrov, Cochrane gambit911.1%38.9%
B68Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 9...Be7911.1%38.9%
C33KGA, bishop's gambit, Bogolyubov variation911.1%61.1%
C34KGA, Fischer defence2810.7%33.9%
C02French, advance, Nimzovich system7610.5%46.1%
A43Old Benoni, Franco-Benoni defence1910.5%57.9%
A60Benoni defence1910.5%47.4%
C16French, Winawer, Petrosian variation2010.0%35.0%
C66Ruy Lopez, Berlin defence, 4.O-O, d61010.0%55.0%
A17English, Nimzo-English opening1010.0%55.0%
C62Ruy Lopez, old Steinitz defence, Nimzovich attack1010.0%55.0%
A08Reti, King's Indian attack, French variation1010.0%35.0%
D44QGD semi-Slav, anti-Meran, Szabo variation1010.0%35.0%
C60Ruy Lopez (Spanish opening)219.5%52.4%
C55Two knights defence219.5%52.4%
D47QGD semi-Slav, 7.Bc4559.1%48.2%
C58Two knights defence119.1%59.1%
E80King's Indian, Saemisch variation119.1%50.0%
C44Ponziani counter-gambit119.1%22.7%
D97Gruenfeld, Russian, Szabo (Boleslavsky) variation119.1%59.1%
C28Vienna game348.8%66.2%
D97Gruenfeld, Russian, Byrne (Simagin) variation248.3%33.3%
C17French, Winawer, advance, Russian variation128.3%54.2%
D31QGD, Alapin variation128.3%29.2%
C70Ruy Lopez, Schliemann defence deferred128.3%45.8%
C44Scotch, Lolli variation258.0%64.0%
B07Pirc, Sveshnikov system258.0%64.0%
B32Sicilian, Flohr variation137.7%73.1%
A62Benoni, fianchetto variation547.4%66.7%
C60Ruy Lopez, Cozio defence287.1%60.7%
D63QGD, Orthodox defence, Swiss, Karlsbad variation147.1%39.3%
C92Ruy Lopez, closed, Kholmov variation306.7%56.7%
C56Two knights defence156.7%43.3%
B80Sicilian, Scheveningen, Vitolins variation166.3%46.9%
E15Queen's Indian, Rubinstein variation175.9%50.0%
E59Nimzo-Indian, 4.e3, main line175.9%55.9%
C12French, MacCutcheon, Lasker variation365.6%58.3%
B61Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2185.6%41.7%
C19French, Winawer, advance, Smyslov variation140.0%50.0%
C27Boden-Kieseritsky gambit140.0%50.0%
A61Benoni, Nimzovich (knight's tour) variation130.0%69.2%
D33QGD, Tarrasch, Folkestone (Swedish) variation120.0%58.3%
B09Pirc, Austrian attack, 6.Be3120.0%66.7%
B02Alekhine's defence, Saemisch attack110.0%63.6%
A99Dutch, Ilyin-Genevsky variation with b3100.0%60.0%
A92Dutch, stonewall variation100.0%80.0%
E83King's Indian, Saemisch, 6...Nc6100.0%50.0%
A20English, Nimzovich variation100.0%60.0%
A76Benoni, classical, 9...Re8100.0%60.0%
C29Vienna gambit, Breyer variation90.0%66.7%
C44Scotch opening90.0%33.3%
A18English, Mikenas-Carls, Kevitz variation90.0%55.6%
B04Alekhine's defence, modern, Schmid variation80.0%75.0%
C34KGA, Becker defence80.0%25.0%
B18Caro-Kann, classical, Flohr variation80.0%62.5%
C51Evans gambit declined, 5.a480.0%50.0%
E83King's Indian, Saemisch, Panno formation70.0%42.9%
C22Centre game, Paulsen attack70.0%57.1%
B12Caro-Kann, Edinburgh variation70.0%85.7%
D01Richter-Veresov attack, Richter variation70.0%42.9%
C43Petrov, Urusov gambit70.0%28.6%
C33KGA, bishop's gambit60.0%33.3%
E17Queen's Indian, 5.Bg2 Be760.0%50.0%
B57Sicilian, Magnus Smith trap60.0%66.7%
C35KGA, Cunningham defence60.0%16.7%
A12English, Capablanca's variation60.0%33.3%
A06Reti, old Indian attack60.0%16.7%
C25Vienna, Pierce gambit60.0%16.7%
C13French, classical, Anderssen variation60.0%33.3%
C00French, Reversed Philidor formation60.0%33.3%
B25Sicilian, closed, 6.Ne2 e5 (Botvinnik)50.0%60.0%
D30QGD Slav, Semmering variation50.0%60.0%
C69Ruy Lopez, exchange variation, Alapin gambit50.0%60.0%
C81Ruy Lopez, open, Howell attack50.0%80.0%
C31KGD, Nimzovich counter-gambit50.0%60.0%
C37KGA, Quaade gambit50.0%0.0%
B71Sicilian, dragon, Levenfish variation50.0%40.0%
E15Queen's Indian, Buerger variation50.0%20.0%
A73Benoni, classical, 9.O-O50.0%40.0%
B98Sicilian, Najdorf, 7...Be750.0%40.0%
B09Pirc, Austrian attack, 6.e550.0%60.0%
C92Ruy Lopez, closed, Keres (9...a5) variation50.0%40.0%
C52Evans gambit, Tartakower attack50.0%60.0%
E72King's Indian with e4 & g350.0%20.0%
C55Two knights defence, Perreux variation50.0%80.0%
A12English, New York (London) defensive system50.0%40.0%
C34King's knight's gambit50.0%20.0%
D06QGD, Marshall defence40.0%50.0%
A52Budapest defence40.0%100.0%
B04Alekhine's defence, modern, Keres variation40.0%100.0%
C35KGA, Cunningham, Euwe defence40.0%25.0%
D22QGA, Haberditz variation40.0%75.0%
C53Giuoco Piano, close variation40.0%50.0%
B84Sicilian, Scheveningen, classical, Nd7 system40.0%25.0%
A97Dutch, Ilyin-Genevsky, Winter variation40.0%75.0%
A28English, Nenarokov variation40.0%75.0%
C58Two knights defence, Bogolyubov variation40.0%25.0%
B72Sicilian, dragon, classical, Amsterdam variation40.0%25.0%
E54Nimzo-Indian, 4.e3, Gligoric system, Smyslov variation40.0%25.0%
A72Benoni, classical without 9.O-O40.0%75.0%
C93Ruy Lopez, closed, Smyslov defence40.0%75.0%
C44Ponziani, Steinitz variation40.0%100.0%
D48QGD semi-Slav, Meran, old main line40.0%100.0%
C61Ruy Lopez, Bird's defence, Paulsen variation40.0%25.0%
B03Alekhine's defence, four pawns attack40.0%50.0%
C42Petrov, French attack40.0%25.0%
C34KGA, Bonsch-Osmolovsky variation30.0%66.7%
E74King's Indian, Averbakh, 6...c530.0%33.3%
C45Scotch, Meitner variation30.0%33.3%
C56Two knights defence, Canal variation30.0%33.3%
E46Nimzo-Indian, Simagin variation30.0%33.3%
D08QGD, Albin counter-gambit, Alapin variation30.0%33.3%
C14French, classical, Rubinstein variation30.0%100.0%
B03Alekhine's defence, four pawns attack, Trifunovic variation30.0%0.0%
C25Vienna gambit30.0%33.3%
E97King's Indian, orthodox, Aronin-Taimanov, bayonet attack30.0%33.3%
D98Gruenfeld, Russian, Keres variation30.0%66.7%
E81King's Indian, Saemisch, Byrne variation30.0%33.3%
A50Queen's Indian accelerated30.0%66.7%
C30KGD, classical, Soldatenkov variation30.0%66.7%
C48Four knights, Bardeleben variation30.0%66.7%
D51QGD, Alekhine variation30.0%33.3%
C14French, classical, Pollock variation30.0%33.3%
A69Benoni, four pawns attack, main line30.0%33.3%
C21Danish gambit, Soerensen defence30.0%100.0%
E50Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d530.0%66.7%
C55Two knights, Max Lange attack, Schlechter variation30.0%66.7%
C30KGD, classical, 4.c330.0%66.7%
E21Nimzo-Indian, three knights, Korchnoi variation30.0%66.7%
D43QGD semi-Slav, Hastings variation30.0%0.0%
B07Pirc, bayonet (Mariotti) attack30.0%33.3%
E37Nimzo-Indian, classical, Noa variation, main line, 7.Qc230.0%66.7%
C36KGA, Abbazia defence (classical defence, modern defence[!])30.0%66.7%
C82Ruy Lopez, open, Motzko attack30.0%100.0%
C25Vienna, Steinitz gambit, Fraser-Minckwitz variation30.0%0.0%
C41Philidor, Philidor counter-gambit, Zukertort variation30.0%100.0%
C41Philidor, Nimzovich, Klein variation30.0%66.7%
D35QGD, Harrwitz attack30.0%33.3%
C80Ruy Lopez, open, Tartakower variation30.0%33.3%
D72Neo-Gruenfeld, 5.cd, main line30.0%0.0%
B03Alekhine's defence, O'Sullivan gambit20.0%50.0%
A04Reti, Pirc-Lisitsin gambit20.0%100.0%
C55Two knights, Max Lange attack20.0%0.0%
E30Nimzo-Indian, Leningrad, ...b5 gambit20.0%0.0%
B64Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9.f420.0%100.0%
C52Evans gambit, Lasker defence20.0%50.0%
B01Scandinavian defence, Gruenfeld variation20.0%50.0%
B40Sicilian, Pin variation (Sicilian counter-attack)20.0%50.0%
C37KGA, Muzio gambit20.0%0.0%
C33KGA, bishop's gambit, Lopez-Gianutio counter-gambit20.0%0.0%
B03Alekhine's defence, four pawns attack, Planinc variation20.0%100.0%
C38King's knight's gambit20.0%50.0%
C57Two knights defence, Fegatello attack, Leonhardt variation20.0%0.0%
E08Catalan, closed, 7.Qc220.0%100.0%
C02French, advance, Nimzovich variation20.0%0.0%
C67Ruy Lopez, Berlin defence, Minckwitz variation20.0%100.0%
D57QGD, Lasker defence, Bernstein variation20.0%50.0%
D26QGA, classical, Steinitz variation20.0%100.0%
C38KGA, Hanstein gambit20.0%0.0%
D63QGD, Orthodox defence, Pillsbury attack20.0%50.0%
E23Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc620.0%50.0%
B15Caro-Kann, Gurgenidze counter-attack20.0%100.0%
B90Sicilian, Najdorf, Adams attack20.0%50.0%
C13French, classical, Anderssen-Richter variation20.0%50.0%
A67Benoni, Taimanov variation20.0%50.0%
D67QGD, Orthodox defence, Bd3 line20.0%100.0%
C14French, classical, Alapin variation20.0%50.0%
A98Dutch, Ilyin-Genevsky variation with Qc220.0%0.0%
C41Philidor, Lopez counter-gambit20.0%100.0%
A17English, Queens Indian formation20.0%50.0%
C82Ruy Lopez, open, Dilworth variation20.0%50.0%
B96Sicilian, Najdorf, Polugayevsky, Simagin variation20.0%50.0%
D67QGD, Orthodox defence, Bd3 line, Janowski variation20.0%100.0%
C22Centre game, Charousek variation20.0%100.0%
D90Gruenfeld, Schlechter variation20.0%100.0%
C33King's gambit accepted20.0%100.0%
D23Queen's gambit accepted20.0%0.0%
A80Dutch, Manhattan (Alapin, Ulvestad) variation20.0%50.0%
B00KP, Nimzovich defence, Marshall gambit20.0%50.0%
A21English, Smyslov defence20.0%100.0%
B96Sicilian, Najdorf, Polugayevsky variation20.0%0.0%
B01Scandinavian defence, Lasker variation20.0%50.0%
C78Ruy Lopez, ...b5 & ...d620.0%50.0%
C21Danish gambit, Collijn defence20.0%0.0%
B01Scandinavian, Richter variation20.0%50.0%
C58Two knights defence, Yankovich variation20.0%50.0%
C13French, classical20.0%50.0%
C06French, Tarrasch, Leningrad variation20.0%100.0%
C14French, classical, Tarrasch variation20.0%100.0%
D18QGD Slav, Dutch, Lasker variation20.0%100.0%
A92Dutch defence20.0%50.0%
C89Ruy Lopez, Marshall, main line, 14...Qh320.0%50.0%
C40Latvian, Fraser defence10.0%100.0%
C31KGD, Falkbeer, Nimzovich variation10.0%100.0%
D63QGD, Orthodox defence, Capablanca variation10.0%100.0%
C37KGA, Rosentreter gambit10.0%100.0%
A06Tennison (Lemberg, Zukertort) gambit10.0%100.0%
C44Scotch, Goering gambit, Bardeleben variation10.0%0.0%
C12French, MacCutcheon, Bernstein variation10.0%100.0%
D51QGD10.0%0.0%
A70Benoni, classical without 9.O-O10.0%100.0%
C37KGA, Silberschmidt gambit10.0%0.0%
C44Ponziani, Reti variation10.0%100.0%
A12English, Caro-Kann defensive system, Bogolyubov variation10.0%0.0%
C29Vienna gambit, Steinitz variation10.0%100.0%
E82King's Indian, Saemisch, double fianchetto variation10.0%100.0%
E60King's Indian, Danube gambit10.0%100.0%
E60King's Indian, 3.g3, counterthrust variation10.0%0.0%
B69Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 11.Bxf610.0%100.0%
C23Bishop's opening, Lewis counter-gambit10.0%0.0%
C00French, Wing gambit10.0%0.0%
C89Ruy Lopez, Marshall, Kevitz variation10.0%0.0%
D83Gruenfeld, Gruenfeld gambit10.0%100.0%
A46Queen's pawn, Torre attack, Wagner gambit10.0%0.0%
C48Four knights, Rubinstein counter-gambit, Bogolyubov variation10.0%0.0%
D64QGD, Orthodox defence, Rubinstein attack, Gruenfeld variation10.0%0.0%
B02Alekhine's defence, Steiner variation10.0%0.0%
D86Gruenfeld, exchange, Simagin's lesser variation10.0%100.0%
A03Mujannah opening10.0%0.0%
C33KGA, bishop's gambit, Maurian defence10.0%100.0%
C13French, Albin-Alekhine-Chatard attack, Teichmann variation10.0%100.0%
E36Nimzo-Indian, classical, Botvinnik variation10.0%0.0%
C58Two knights defence, Colman variation10.0%100.0%
C29Vienna gambit, Kaufmann variation10.0%100.0%
E12Queen's Indian, 4.Nc3, Botvinnik variation10.0%0.0%
C41Philidor, Hanham, Steiner variation10.0%100.0%
D51QGD, Manhattan variation10.0%0.0%
A02Bird, From gambit10.0%100.0%
C83Ruy Lopez, open, 9...Be7, 10.Re110.0%100.0%
D32QGD, Tarrasch defence, Tarrasch gambit10.0%0.0%
C30KGD, 2...Nf610.0%0.0%
C23Bishop's opening, Philidor counter-attack10.0%100.0%
C33KGA, bishop's gambit, Boren-Svenonius variation10.0%0.0%
D31QGD, semi-Slav, Junge variation10.0%100.0%
C42Petrov, classical attack, Maroczy variation10.0%100.0%
C66Ruy Lopez, closed Berlin defence, Bernstein variation10.0%0.0%
E87King's Indian, Saemisch, orthodox, Bronstein variation10.0%100.0%
C65Ruy Lopez, Berlin defence, Kaufmann variation10.0%100.0%
A25English, closed, 5.Rb1 Taimanov variation10.0%0.0%
C39KGA, Kieseritsky, Berlin defence10.0%0.0%
A68Benoni, four pawns attack10.0%0.0%
D00Blackmar-Diemer gambit10.0%100.0%
A38English, symmetrical, main line with b310.0%0.0%
D67QGD, Orthodox defence, Bd3 line, 11.O-O10.0%100.0%
C13French, classical, Vistaneckis (Nimzovich) variation10.0%100.0%
A47Queen's Indian, Marienbad system10.0%100.0%
C51Evans gambit declined10.0%0.0%
C82Ruy Lopez, open, Motzko attack, Nenarokov variation10.0%0.0%
B31Sicilian, Nimzovich-Rossolimo attack, Gurgenidze variation10.0%100.0%
B05Alekhine's defence, modern, Panov variation10.0%100.0%
C33KGA, Keres (Mason-Steinitz) gambit10.0%100.0%
C07French, Tarrasch, Eliskases variation10.0%0.0%
C51Evans gambit, Steinitz variation10.0%0.0%
E24Nimzo-Indian, Saemisch, Botvinnik variation10.0%0.0%
D49QGD semi-Slav, Meran, Rabinovich variation10.0%100.0%
A05Reti, King's Indian attack, Reti-Smyslov variation10.0%0.0%
C30KGD, Keene's defence10.0%100.0%
C70Ruy Lopez, Graz variation10.0%100.0%
B85Sicilian, Scheveningen, classical variation with ...Qc7 and ...Nc610.0%0.0%
C53Giuoco Piano, Mestel variation10.0%100.0%
B83Sicilian, modern Scheveningen, main line with Nb310.0%0.0%
D08QGD, Albin counter-gambit, Balogh variation10.0%0.0%
B01Scandinavian, Anderssen counter-attack, Goteborg system10.0%100.0%
A44Old Benoni defence10.0%0.0%
C45Scotch, Paulsen attack10.0%0.0%
D08QGD, Albin counter-gambit, Krenosz variation10.0%100.0%
C41Philidor, Nimzovich, Sokolsky variation10.0%100.0%
C46Three knights, Steinitz, Rosenthal variation10.0%0.0%
A82Dutch, Balogh defence10.0%100.0%
C41Philidor, Nimzovich, Sozin variation10.0%100.0%
C89Ruy Lopez, Marshall, Herman Steiner variation10.0%0.0%
B03Alekhine's defence, four pawns attack, fianchetto variation10.0%100.0%
B40Sicilian, Pin, Jaffe variation10.0%100.0%
B09Pirc, Austrian attack, Ljubojevic variation10.0%100.0%
D99Gruenfeld defence, Smyslov, Yugoslav variation10.0%100.0%
E92King's Indian, classical variation10.0%0.0%
C10French, Rubinstein, Capablanca line10.0%100.0%
A71Benoni, classical, 8.Bg510.0%100.0%
C31KGD, Falkbeer, Morphy gambit10.0%0.0%
C80Ruy Lopez, open, Friess attack10.0%100.0%
C96Ruy Lopez, closed, Keres (...Nd7) defence10.0%100.0%
A81Dutch defence, Blackburne variation10.0%0.0%
C14French, classical, Stahlberg variation10.0%0.0%
C55Two knights, Max Lange attack, Steinitz variation10.0%100.0%
C45Scotch, Tartakower variation10.0%0.0%
C49Four knights, Svenonius variation10.0%100.0%
C41Philidor, Hanham, Kmoch variation10.0%0.0%
C15French, Winawer, Alekhine gambit10.0%100.0%

Created in 2005-2012 by Kirill Kryukov
Updated on June 16, 2013