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 games in our database were played from various openings classified by the Encyclopedia of Chess Openings. The table also shows average draw percentage and white score we observed in our games.

ECONumber
of
games
DrawsWhite
score
A95Dutch, Stonewall with Nc32100.0%50.0%
A77Benoni, Classical, 9...Re8, 10.Nd21100.0%50.0%
E99King's Indian, Orthodox, Aronin-Taimanov, Main line1100.0%50.0%
A59Benko gambit, 7.e41100.0%50.0%
D71Neo-Gruenfeld, 5.cd475.0%37.5%
A94Dutch, Stonewall with Ba3560.0%30.0%
E47Nimzo-Indian, 4.e3 O-O, 5.Bd31457.1%50.0%
E84King's Indian, Saemisch, Panno Main line850.0%50.0%
E02Catalan, open, 5.Qa4650.0%41.7%
E27Nimzo-Indian, Saemisch variation, 5...0-0450.0%25.0%
D81Gruenfeld; Russian variation450.0%50.0%
C32KGD, Falkbeer, 5. dxe4250.0%25.0%
D87Gruenfeld, Exchange, Spassky variation3447.1%58.8%
D88Gruenfeld, Spassky variation, Main line, 10...cd, 11.cd1546.7%56.7%
C74Ruy Lopez, Modern Steinitz defense2343.5%43.5%
D75Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc33542.9%50.0%
C75Ruy Lopez, Modern Steinitz defense1442.9%64.3%
E88King's Indian, Saemisch, Orthodox, 7.d5 c6742.9%64.3%
B39Sicilian, Accelerated Fianchetto, Breyer variation3141.9%50.0%
E51Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d53040.0%43.3%
B95Sicilian, Najdorf, 6...e62540.0%48.0%
E69King's Indian, Fianchetto, Classical Main line2040.0%40.0%
A65Benoni, 6.e4540.0%40.0%
E34Nimzo-Indian, Classical, Noa variation3638.9%58.3%
D53QGD; 4.Bg5 Be73737.8%48.6%
C73Ruy Lopez, Modern Steinitz defense, Richter variation2437.5%43.8%
D62QGD; Orthodox defense, 7.Qc2 c5, 8.cd (Rubinstein)3336.4%54.5%
A27English Opening, Three knights system2835.7%46.4%
C66Ruy Lopez, Berlin defence, 4.O-O, d64835.4%55.2%
B53Sicilian, Chekhover variation7435.1%48.6%
B94Sicilian, Najdorf, 6.Bg52035.0%57.5%
C86Worrall attack4934.7%45.9%
E70King's Indian, 4.e42934.5%48.3%
D59QGD; Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd59334.4%52.7%
C76Ruy Lopez, Modern Steinitz defense, Fianchetto (Bronstein) variation2733.3%53.7%
B29Sicilian, Nimzovich-Rubinstein variation2433.3%45.8%
A16English Opening2433.3%45.8%
A91Dutch defense2433.3%58.3%
E13Queen's Indian, 4.Nc3, Main line933.3%61.1%
E26Nimzo-Indian, Saemisch variation, 4. a3 Bxc3+ 5. bxc3 c5 6. e3933.3%50.0%
E36Nimzo-Indian, Classical, Noa variation, 5. a3633.3%33.3%
E89King's Indian, Saemisch, Orthodox Main line333.3%83.3%
A63Benoni, Fianchetto variation, 9...Nbd7333.3%50.0%
E85King's Indian, Saemisch, Orthodox variation333.3%50.0%
B59Sicilian, Boleslavsky variation, 7.Nb3333.3%50.0%
E28Nimzo-Indian, Saemisch variation, 6. e3333.3%16.7%
C96Ruy Lopez, closed, 8...Na55232.7%64.4%
D77Neo-Gruenfeld, 6.O-O7132.4%51.4%
C09French, Tarrasch, Open variation, Main line62132.2%56.0%
C49Four knights, double Ruy Lopez32032.2%54.2%
A14English, Neo-Catalan declined20632.0%56.8%
B36Sicilian, Accelerated Fianchetto, Maroczy bind10032.0%51.0%
B85Sicilian, Scheveningen, Classical variation with ...Qc7 and ...Nc62532.0%48.0%
D18QGD; Dutch variation9431.9%54.3%
B75Sicilian, Dragon, Yugoslav attack4131.7%50.0%
A82Dutch, Staunton gambit1631.3%40.6%
D79Neo-Gruenfeld, 6.O-O, Main line7731.2%50.6%
D76Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb62931.0%67.2%
A54Old Indian, Ukrainian variation3930.8%69.2%
D82Gruenfeld 4.Bf41330.8%61.5%
D40QGD; Semi-Tarrasch defense32930.7%46.7%
D80Gruenfeld defense4930.6%45.9%
C08French, Tarrasch, Open, 4.exd5 exd551530.5%50.8%
C39King's knight's gambit2330.4%54.3%
B52Sicilian, Canal-Sokolsky attack, 3...Bd724530.2%49.0%
D85Gruenfeld, exchange variation69630.0%47.6%
B05Alekhine's defense, Modern variation, 4...Bg43030.0%58.3%
C71Ruy Lopez, Modern Steinitz defense2030.0%55.0%
D36QGD; Exchange, positional line, 6.Qc21030.0%45.0%
A38English Opening, Symmetrical14729.9%51.7%
C65Ruy Lopez, Berlin defense11829.7%55.5%
A21English Opening31629.4%53.0%
C84Ruy Lopez, Closed defense6829.4%47.1%
E48Nimzo-Indian, 4.e3 O-O, 5.Bd3 d51729.4%55.9%
D99Gruenfeld defense, Smyslov, Main line1729.4%55.9%
E05Catalan, Open, Classical line9929.3%57.1%
B08Pirc, Classical (Two knights) system28129.2%57.3%
C13French, Classical4829.2%60.4%
C82Ruy Lopez, Open, 9.c32429.2%64.6%
B37Sicilian, Accelerated Fianchetto, Maroczy bind, 5...Bg72429.2%47.9%
A11English, Caro-Kann defensive system5529.1%54.5%
A29English Opening, Four knights, kingside Fianchetto250829.1%49.8%
C85Ruy Lopez, Exchange variation doubly deferred (DERLD)3129.0%53.2%
D21QGA, 3.Nf313129.0%55.7%
E09Catalan, Closed, Main line7628.9%56.6%
E06Catalan, Closed, 5.Nf363628.9%51.4%
C68Ruy Lopez, Exchange variation11128.8%47.7%
C80Ruy Lopez, Open (Tarrasch) defence30228.8%46.2%
B41Sicilian, Kan variation6628.8%61.4%
C43Petrov, Modern (Steinitz) attack56328.8%52.0%
D58QGD; Tartakower (Makagonov-Bondarevsky) system286328.7%52.0%
C07French, Tarrasch, Open variation95228.7%52.7%
A36English Opening, Symmetrical10528.6%48.6%
B87Sozin with ...a6 and ...b52128.6%61.9%
D64QGD; Orthodox defense, Rubinstein attack (with Rc1)1428.6%42.9%
A89Dutch, Leningrad, Main variation with Nc61428.6%42.9%
C83Ruy Lopez, Open, Classical defence728.6%57.1%
A22English Opening88928.3%47.8%
C67Ruy Lopez, Berlin defence, Open variation31428.3%53.3%
E94King's Indian, Orthodox variation22028.2%55.5%
E58Nimzo-Indian, 4.e3, Main line with 8...Bxc37128.2%49.3%
A35English Opening, Symmetrical59028.1%53.9%
A50Queen's pawn game42828.0%51.2%
E49Nimzo-Indian, 4.e3, Botvinnik system2528.0%54.0%
D27QGA; classical variation128027.9%53.4%
E16Queen's Indian, Capablanca variation7227.8%62.5%
B62Sicilian, Richter-Rauzer, 6...e65427.8%45.4%
B43Sicilian, Kan, 5.Nc313727.7%53.3%
D39QGD; Ragozin, Vienna variation14927.5%46.0%
E55Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation59727.5%52.4%
B14Caro-Kann, Panov-Botvinnik attack, 5...e653827.3%52.3%
C47Four knights, Scotch variation24227.3%52.1%
B35Sicilian, Accelerated Fianchetto, Modern variation with Bc49927.3%52.0%
B88Sicilian, Sozin, Leonhardt variation5527.3%39.1%
B70Sicilian, Dragon variation3327.3%53.0%
D50QGD; 4.Bg52227.3%40.9%
E98King's Indian, Orthodox, Aronin-Taimanov, 9.Ne12227.3%68.2%
E32Nimzo-Indian, Classical variation88627.2%51.1%
C69Ruy Lopez, Exchange variation, 5.O-O12927.1%50.0%
E67King's Indian, Fianchetto with ...Nd711127.0%53.2%
D74Neo-Gruenfeld, 6.cd Nxd5, 7.O-O5226.9%55.8%
C42Petrov's defense142526.9%54.1%
B48Sicilian, Taimanov variation40226.9%51.7%
A23English Opening, Bremen system, Keres variation6726.9%49.3%
D38QGD; Ragozin variation41726.9%53.5%
A30English Opening, Symmetrical variation232926.8%53.9%
B47Sicilian, Taimanov (Bastrikov) variation98426.8%53.5%
C44King's pawn game26526.8%47.4%
C15French, Winawer (Nimzovich) variation25426.8%57.9%
C78Ruy Lopez, 5.O-O28426.8%48.6%
A49King's Indian, Fianchetto without c414226.8%50.0%
D41QGD; Semi-Tarrasch, 5.cd27726.7%57.8%
C06French, Tarrasch, Closed variation, Main line73526.7%51.2%
B91Sicilian, Najdorf, Zagreb (Fianchetto) variation3026.7%50.0%
D73Neo-Gruenfeld, 5.Nf313926.6%52.2%
D47QGD; Semi-Slav 7.Bc4595026.6%53.8%
D01Richter-Veresov attack22226.6%48.9%
E39Nimzo-Indian, Classical, Pirc variation4926.5%54.1%
E04Catalan, Open, 5.Nf391026.5%50.7%
E65King's Indian, Yugoslav, 7.O-O3426.5%42.6%
C72Ruy Lopez, Modern Steinitz defense 5.0-03426.5%60.3%
D37QGD; 4.Nf3190326.4%53.7%
E71King's Indian, Makagonov system (5.h3)1926.3%39.5%
C91Ruy Lopez, closed, 9.d4237626.3%51.9%
D05Queen's pawn game, Zukertort variation38826.3%57.0%
E17Queen's Indian, 5.Bg2 Be714126.2%59.2%
E18Queen's Indian, Old Main line, 7.Nc314126.2%56.4%
D28QGA; Classical variation 7.Qe26126.2%42.6%
B31Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6)17626.1%56.8%
D93Gruenfeld with 5. Bf4 O-O 6. e34626.1%54.3%
B92Sicilian, Najdorf, Zagreb (Fianchetto) variation48726.1%51.2%
D10QGD; Slav defense33426.0%53.1%
B44Sicilian defense26926.0%51.7%
C11French defense337626.0%52.1%
D55QGD; 6.Nf314325.9%62.6%
E12Queen's Indian defense154225.8%52.7%
E46Nimzo-Indian, 4.e3 O-O3125.8%61.3%
B51Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack25225.8%55.0%
B22Sicilian, Alapin's variation (2.c3)88525.8%53.7%
E38Nimzo-Indian, Classical, 4...c53525.7%55.7%
B45Sicilian, Taimanov variation37125.6%50.5%
B58Sicilian, Classical4725.5%51.1%
E54Nimzo-Indian, 4.e3, Gligoric system with 7...dc4725.5%48.9%
E42Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein)9825.5%48.5%
B84Sicilian, Scheveningen (Paulsen), Classical variation93425.5%50.0%
B60Sicilian, Richter-Rauzer5525.5%47.3%
A25English Opening, Sicilian Reversed49925.5%52.6%
A28English Opening, Four knights system58625.4%55.2%
C90Ruy Lopez, closed (with ...d6)182125.4%53.2%
D17QGD; Slav defense, Czech defence31225.3%55.0%
E10Queen's pawn game 3. Nf388525.3%54.7%
D25QGA, 4.e320625.2%53.4%
C10French, Paulsen variation83225.0%51.6%
D56QGD; Lasker defense10825.0%52.3%
C64Ruy Lopez, Classical (Cordel) defence9225.0%54.9%
B96Sicilian, Najdorf, 7.f42825.0%41.1%
E76King's Indian, Four pawns attack2025.0%57.5%
B74Sicilian, Dragon, Classical, 9.Nb31625.0%56.3%
E45Nimzo-Indian, 4.e3, Bronstein (Byrne) variation825.0%50.0%
E29Nimzo-Indian, Saemisch variation, Main line825.0%37.5%
D95Gruenfeld with 5. e3 O-O 6. Qb3425.0%62.5%
E77King's Indian, Four pawns attack, 6.Be2425.0%62.5%
E93King's Indian, Petrosian system, Main line425.0%62.5%
B17Caro-Kann, Steinitz variation134125.0%54.1%
A81Dutch defense22524.9%59.6%
D48QGD; Meran, 8...a6125024.9%49.1%
C88Ruy Lopez, Closed19724.9%45.9%
E00Queen's pawn game53924.9%51.8%
B83Sicilian, Scheveningen, 6.Be216524.8%49.4%
C77Ruy Lopez, Morphy defence14524.8%53.1%
D46QGD; Semi-Slav 6.Bd324224.8%55.8%
E15Queen's Indian, 4.g3470924.7%54.3%
D13QGD; Slav defense, Exchange variation17424.7%52.6%
A20English Opening150624.7%50.4%
D30QGD74924.7%51.5%
A33English Opening, Symmetrical54724.7%54.6%
D42QGD; Semi-Tarrasch, 7.Bd37724.7%50.0%
A52Budapest defense7724.7%63.0%
B13Caro-Kann, Exchange variation37324.7%54.4%
B19Caro-Kann, Classical, 7...Nd7155724.7%60.2%
D32QGD; Tarrasch defense6924.6%51.4%
D97Gruenfeld, Russian variation with 7. e481224.6%58.5%
E35Nimzo-Indian, Classical, Noa variation, 5. cxd5 exd55724.6%47.4%
D34QGD; Tarrasch, 7...Be742824.5%62.3%
C50King's pawn game55924.5%53.2%
E01Catalan, closed4924.5%51.0%
E68King's Indian, Fianchetto, Classical variation, 8.e433124.5%53.6%
A53Old Indian defense18424.5%49.7%
C01French, Exchange variation44324.4%55.3%
A48King's Indian, East Indian defense39824.4%52.6%
A84Dutch defense19724.4%53.8%
B10Caro-Kann defense104324.4%53.0%
D94Gruenfeld, 5.e39924.2%50.5%
D26QGA; classical variation48724.2%50.3%
E11Bogo-Indian defense70624.2%54.6%
C70Ruy Lopez,19024.2%51.6%
A80Dutch25724.1%51.0%
E92King's Indian, Classical variation22424.1%52.2%
D90Gruenfeld, Three knights variation8324.1%55.4%
D92Gruenfeld, 5.Bf410824.1%54.6%
B28Sicilian, O'Kelly variation7924.1%58.9%
C26Vienna, Falkbeer variation18823.9%53.5%
A88Dutch, Leningrad, Main variation with 7...c64623.9%42.4%
E14Queen's Indian, 4.e327723.8%52.3%
D29QGA; Classical variation 8...Bb718923.8%48.9%
B16Caro-Kann, Bronstein-Larsen variation2123.8%64.3%
E73King's Indian, 5.Be22123.8%45.2%
B32Sicilian defense10123.8%61.4%
C46Three knights game39223.7%53.2%
B46Sicilian, Taimanov variation60723.7%55.5%
A07Reti Opening, King's Indian attack (Barcza system)148523.6%52.2%
B02Alekhine's defense7223.6%50.7%
E62King's Indian, Fianchetto variation22523.6%56.2%
D03Torre attack, Tartakower variation20423.5%53.9%
C16French, Winawer, Advance variation18723.5%56.7%
B82Sicilian, Scheveningen, 6.f46823.5%55.9%
E95King's Indian, Orthodox, 7...Nbd7, 8.Re13423.5%44.1%
D45QGD; Semi-Slav 5.e3219123.5%52.5%
B15Caro-Kann defense27323.4%52.7%
C57Two knights defense6423.4%46.1%
A01Nimzovich-Larsen attack52623.4%48.8%
B50Sicilian50123.4%54.8%
D96Gruenfeld, Russian variation3023.3%55.0%
D12QGD; Slav defense, 4.e3 Bf544223.3%55.3%
D91Gruenfeld, Three knights variation17223.3%54.1%
D78Neo-Gruenfeld, 6.O-O c614223.2%53.2%
A46Queen's pawn game52523.2%53.1%
D35QGD; 3...Nf628023.2%48.0%
B76Sicilian, Dragon, Yugoslav attack, 7...O-O28023.2%48.4%
D20Queen's Gambit accepted59623.2%54.9%
C21center game1323.1%65.4%
E24Nimzo-Indian, Saemisch variation1323.1%34.6%
A17English Opening3522.9%62.9%
C63Ruy Lopez, Schilemann defense3522.9%54.3%
B54Sicilian19722.8%47.5%
C45Scotch game62322.8%49.9%
A15English, 1...Nf6 (Anglo-Indian defense)58022.8%54.3%
C17French, Winawer, Advance variation23322.7%52.6%
B90Sicilian, Najdorf344022.7%50.7%
D61QGD; Orthodox defense, Rubinstein variation4422.7%50.0%
E43Nimzo-Indian, Fischer variation2222.7%56.8%
C33King's gambit accepted7522.7%40.7%
B33Sicilian defense21222.6%50.0%
B40Sicilian defense92822.6%52.3%
E60King's Indian defense81922.6%54.9%
D02Queen's pawn game, 2. Nf3288022.6%52.2%
C03French, Tarrasch42122.6%54.5%
C55Two knights defense13322.6%54.9%
B12Caro-Kann defense152422.5%53.4%
C19French, Winawer, Advance, 6...Ne7274322.5%58.9%
C92Ruy Lopez, closed, 9.d410722.4%61.7%
D24QGA, 4.Nc35822.4%50.9%
B38Sicilian, Accelerated Fianchetto, Maroczy bind, 6.Be36722.4%57.5%
D16QGD; Slav accepted, Alapin variation7622.4%57.2%
D04Queen's pawn game27422.3%52.0%
B00King's pawn Opening27922.2%53.8%
D86Gruenfeld, Exchange, Classical variation8122.2%49.4%
E87King's Indian, Saemisch, Orthodox, 7.d58122.2%63.0%
B93Sicilian, Najdorf, 6.f45422.2%48.1%
A42Modern defense, Averbakh system4522.2%53.3%
C52Evans gambit1822.2%50.0%
A32English Opening, Symmetrical1822.2%50.0%
B06Robatsch (Modern) defense30222.2%56.5%
B30Sicilian defense63722.1%52.5%
A40Queen's pawn46622.1%54.4%
A34English Opening, Symmetrical44822.1%51.2%
A06Reti Opening, 2..d582422.1%55.7%
B56Sicilian25022.0%55.8%
B18Caro-Kann, Classical variation34622.0%56.6%
A39English Opening, Symmetrical, Main line with d47321.9%54.8%
D19QGD; Dutch variation70321.9%58.3%
D11QGD; Slav defense, 3.Nf363021.9%52.7%
C25Vienna game10521.9%44.3%
E53Nimzo-Indian, 4.e3, Main line with ...c53221.9%57.8%
E52Nimzo-Indian, 4.e3, Main line with ...b63221.9%48.4%
E63King's Indian, Fianchetto, Panno variation37521.9%53.9%
C53Giuoco piano29821.8%52.2%
B42Sicilian, Kan, 5.Bd324321.8%50.8%
E19Queen's Indian, Old Main line, 9.Qxc314721.8%57.1%
E91King's Indian, 6.Be213821.7%60.1%
B24Sicilian, Closed6921.7%47.1%
A51Budapest defense declined2321.7%76.1%
C40King's knight Opening2321.7%58.7%
A05Reti Opening, 2..Nf669521.7%52.2%
C41Philidor's defense31821.7%56.1%
A00Irregular Openings94121.7%51.1%
A45Queen's pawn game75821.6%51.5%
D31QGD, 3.Nc346721.6%51.3%
D63QGD; Orthodox defense, 7.Rc16521.5%52.3%
D43QGD; Semi-Slav90621.5%49.8%
D14QGD; Slav defense, Exchange variation12621.4%56.7%
A13English Opening55621.4%50.4%
C48Four knights, Spanish variation43521.4%53.9%
B49Sicilian, Taimanov variation18821.3%57.4%
C14French, Classical variation22121.3%55.0%
D15QGD; Slav accepted, Exchange variation, 6.Bf4 Bf548021.3%51.3%
C60Ruy Lopez9921.2%50.0%
C18French, Winawer, Advance variation12821.1%53.5%
C37KGA, Quaade gambit1921.1%31.6%
E66King's Indian, Fianchetto, Yugoslav Panno10521.0%55.2%
B09Pirc, Austrian attack10521.0%53.3%
C22center game4320.9%59.3%
A09Reti Opening, 2..d5 3.c415420.8%59.1%
C05French, Tarrasch, Closed variation26520.8%56.4%
C00French defense131120.7%54.2%
D44QGD; Semi-Slav 5.Bg5 dc42920.7%54.2%
E81King's Indian, Saemisch, 5...O-O8220.7%50.6%
A31English Opening, Symmetrical, Benoni formation33920.6%51.9%
E97King's Indian, Orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)87920.6%57.3%
B66Sicilian, Richter-Rauzer, Rauzer attack, 7...a6280820.6%47.9%
B21Sicilian, Grand Prix attack17520.6%44.6%
B20Sicilian defense27320.5%48.4%
E90King's Indian, 5.Nf311720.5%52.1%
D08QGD; Albin counter-gambit3920.5%41.0%
A37English Opening, Symmetrical13220.5%55.7%
A90Dutch defense13220.5%58.7%
B81Sicilian, Scheveningen, Keres attack31820.4%53.3%
B57Sicilian, Sozin (not Scheveningen)12820.3%48.4%
B01Scandinavian (centercounter) center defense51920.2%54.2%
C20King's pawn game8920.2%51.7%
B23Sicilian, Closed45020.2%51.7%
E20Nimzo-Indian defense14920.1%48.3%
A55Old Indian, Main line4020.0%52.5%
D98Gruenfeld, Russian, Smyslov variation4020.0%55.0%
A70Benoni, Classical with e4 and Nf33520.0%58.6%
D70Neo-Gruenfeld defense2020.0%60.0%
C31KGD, Falkbeer counter-gambit1520.0%50.0%
E44Nimzo-Indian, Fischer variation, 5.Ne21520.0%56.7%
D57QGD; Lasker defense, Main line1020.0%50.0%
D65QGD; Orthodox defense, Rubinstein attack, Main line520.0%30.0%
C23Bishop's Opening7619.7%45.4%
B67Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd727419.7%50.0%
D52QGD18319.7%56.3%
D66QGD; Orthodox defense, Bd3 line6119.7%57.4%
C02French, Advance variation103219.7%52.8%
C89Ruy Lopez, Marshall counter-attack5619.6%42.0%
A43Old Benoni defense12819.5%55.9%
A04Reti Opening106819.5%54.9%
A58Benko gambit accepted3619.4%54.2%
D00Queen's pawn game140619.4%51.9%
B97Sicilian, Najdorf, 7...Qb654619.4%44.3%
B72Sicilian, Dragon, 6.Be33119.4%48.4%
C24Bishop's Opening, Berlin defense11419.3%53.5%
D07QGD; Chigorin defense18719.3%58.3%
A26English Opening, Closed system10419.2%46.2%
A83Dutch, Staunton gambit, Staunton's line2619.2%48.1%
A10English Opening51519.2%56.0%
C97Ruy Lopez, Closed, Chigorin defense4219.0%59.5%
A85Dutch with 2.c4 & 3.Nc32119.0%61.9%
E21Nimzo-Indian, Three knights variation18419.0%53.0%
B11Caro-Kann, Two knights, 3...Bg410019.0%49.5%
B07Pirc defense29718.9%58.2%
B03Alekhine's defense22418.8%53.1%
A57Benko gambit8018.8%48.1%
E07Catalan, Closed, 6...Nbd74818.8%65.6%
C59Two knights defense7018.6%55.0%
B25Sicilian, Closed8118.5%47.5%
D09QGD; Albin counter-gambit, 5.g32718.5%57.4%
D22QGA; Alekhine defense2718.5%50.0%
E33Nimzo-Indian, Classical variation, 4...Nc63818.4%61.8%
C62Ruy Lopez, Old Steinitz defence4918.4%48.0%
A08Reti Opening, King's Indian attack11018.2%46.4%
B73Sicilian, Dragon, Classical, 8.O-O2218.2%59.1%
E22Nimzo-Indian, Spielmann variation1118.2%36.4%
A97Dutch, Ilyin-Genevsky variation1118.2%72.7%
B80Sicilian, Scheveningen variation19017.9%47.9%
C12French, MacCutcheon variation31317.9%53.0%
C58Two knights defense2817.9%55.4%
D60QGD; Orthodox defense2817.9%44.6%
A56Benoni defense41617.8%59.1%
C04French, Tarrasch, Guimard Main line5117.6%57.8%
A86Dutch with 2.c4 & 3.g31717.6%73.5%
C79Ruy Lopez, Steinitz defense deferred (Russian defence)4017.5%53.8%
D06Queen's Gambit4617.4%56.5%
B99Sicilian, Najdorf, 7...Be7 Main line2317.4%60.9%
E61King's Indian defense, 3.Nc310417.3%51.9%
B89Sicilian, Sozin, 7.Be328017.1%50.7%
E08Catalan, Closed, 7.Qc24717.0%48.9%
B27Sicilian defense19417.0%55.9%
B63Sicilian, Richter-Rauzer, Rauzer attack17216.9%53.8%
B04Alekhine's defense, Modern variation8916.9%54.5%
A47Queen's Indian defense4816.7%54.2%
B98Sicilian, Najdorf, 7...Be74216.7%34.5%
C36KGA, Abbazia defense (Classical defense, Modern defense)3016.7%41.7%
A87Dutch, Leningrad, Main variation3016.7%41.7%
B26Sicilian, Closed, 6.Be33016.7%55.0%
A96Dutch, Classical variation2416.7%54.2%
A93Dutch, Stonewall, Botwinnik variation2416.7%70.8%
E86King's Indian, Saemisch, Orthodox, 7.Nge2 c61216.7%66.7%
A24English Opening, Bremen system with 3...g6616.7%58.3%
A61Benoni defense7316.4%61.6%
C51Evans gambit declined3116.1%43.5%
A41Queen's pawn25016.0%54.0%
E41Nimzo-Indian, 4.e3 c58315.7%42.8%
D51QGD; 4.Bg5 Nbd71315.4%23.1%
D23Queen's gambit accepted4615.2%53.3%
E25Nimzo-Indian, Saemisch variation, Keres variation4615.2%46.7%
E64King's Indian, Fianchetto, Yugoslav system4015.0%60.0%
A12English, Caro-Kann defensive system4015.0%42.5%
D49QGD; Meran, 11. Nxb56714.9%40.3%
D33QGD; Tarrasch, Schlechter-Rubinstein system4714.9%54.3%
C30King's gambit7414.9%62.8%
E40Nimzo-Indian, 4.e34214.3%52.4%
A03Bird's Opening4214.3%45.2%
C54Guioco piano1414.3%42.9%
B86Sicilian, Sozin attack1414.3%28.6%
B65Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd41414.3%50.0%
E31Nimzo-Indian, Leningrad variation, main line714.3%64.3%
A02Bird's Opening5014.0%51.0%
C87Ruy Lopez, Closed, Averbach variation4314.0%51.2%
E56Nimzo-Indian, 4.e3, Main line with 7...Nc61513.3%40.0%
B34Sicilian, Accelerated Fianchetto, Exchange variation6813.2%55.1%
E30Nimzo-Indian, Leningrad variation,4613.0%43.5%
C27Vienna game4613.0%45.7%
B55Sicilian, Prins variation, Venice attack812.5%43.8%
B77Sicilian, Dragon, Yugoslav attack, 9.Bc4812.5%56.3%
A19English, Mikenas-Carls, Sicilian variation2711.1%42.6%
C29Vienna gambit, Kaufmann variation2711.1%61.1%
B68Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7911.1%38.9%
A44Old Benoni defence911.1%27.8%
A60Benoni defense1910.5%47.4%
C61Ruy Lopez, Bird's defense219.5%52.4%
C34King's knight's gambit549.3%36.1%
E80King's Indian, Saemisch variation119.1%50.0%
C28Vienna game348.8%66.2%
A62Benoni, Fianchetto variation547.4%66.7%
A18English, Mikenas-Carls variation147.1%60.7%
E59Nimzo-Indian, 4.e3, Main line175.9%55.9%
B61Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2185.6%41.7%
C56Two knights defense185.6%41.7%
A92Dutch defense205.0%62.5%
E83King's Indian, Saemisch, 6...Nc6170.0%47.1%
A99Dutch, Ilyin-Genevsky variation with b3100.0%60.0%
C35KGA, Cunningham defense100.0%20.0%
A76Benoni, Classical, 9...Re8100.0%60.0%
A73Benoni, Classical, 9.O-O50.0%40.0%
C81Ruy Lopez, Open, Howell attack50.0%80.0%
B71Sicilian, Dragon, Levenfish variation50.0%40.0%
D67QGD; Orthodox defense, Bd3 line, Capablanca freeing manoever50.0%100.0%
E72King's Indian with e4 & g350.0%20.0%
C38King's knight's gambit40.0%25.0%
C93Ruy Lopez, closed, Smyslov defense40.0%75.0%
A72Benoni, Classical without 9.O-O40.0%75.0%
E50Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d530.0%66.7%
E37Nimzo-Indian, Classical, Noa variation, Main line, 7.Qc230.0%66.7%
E74King's Indian, Averbakh, 6...c530.0%33.3%
D72Neo-Gruenfeld, 5.cd, Main line30.0%0.0%
A69Benoni, Four pawns attack, Main line30.0%33.3%
E23Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc620.0%50.0%
A98Dutch, Ilyin-Genevsky variation with Qc220.0%0.0%
A67Benoni, Taimanov variation20.0%50.0%
B64Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f420.0%100.0%
A71Benoni, Classical, 8.Bg510.0%100.0%
D83Gruenfeld gambit10.0%100.0%
B69Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf610.0%100.0%
E82King's Indian, Saemisch, double Fianchetto variation10.0%100.0%
A68Benoni, Four pawns attack10.0%0.0%

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