CCRL 40/40
Downloads and Statistics
April 11, 2008
Testing summary:
Total: 114'872 games
played by 449 programs
16375 CPU days (X2 4600+)

White wins: 41'478 (36.1%)
Black wins: 31'357 (27.3%)
Draws: 42'037 (36.6%)
White score: 54.4%

Opening statistics

This page shows how many games in our database were played from various known openings. The table also shows average draw percentage and white score we observed in our games.

ECOOpeningNumber
of
games
DrawsWhite
score
Commented
PGN
C20Alapin's opening714.3%64.3%
B02Alekhine's defence1010.0%35.0%
B03Alekhine's defence450.0%75.0%
B03Alekhine's defence, Balogh variation10.0%100.0%
B02Alekhine's defence, Brooklyn defence520.0%30.0%
B02Alekhine's defence, Maroczy variation1330.8%53.8%
B03Alekhine's defence, O'Sullivan gambit366.7%66.7%
B02Alekhine's defence, Saemisch attack560.0%50.0%
B02Alekhine's defence, Scandinavian variation70.0%42.9%
B02Alekhine's defence, Two pawns' (Lasker's) attack1145.5%59.1%
B03Alekhine's defence, exchange variation5131.4%56.9%
B03Alekhine's defence, exchange, Karpov variation1100.0%50.0%
B03Alekhine's defence, four pawns attack728.6%57.1%
B03Alekhine's defence, four pawns attack, 7.Be31250.0%75.0%
B03Alekhine's defence, four pawns attack, fianchetto variation40.0%50.0%
B04Alekhine's defence, modern variation1346.2%69.2%
B05Alekhine's defence, modern variation, 4...Bg45332.1%68.9%
B05Alekhine's defence, modern, Alekhine variation1100.0%50.0%
B05Alekhine's defence, modern, Flohr variation812.5%68.8%
B04Alekhine's defence, modern, Keres variation1060.0%60.0%
B04Alekhine's defence, modern, Larsen variation2839.3%62.5%
B04Alekhine's defence, modern, Schmid variation1136.4%54.5%
B04Alekhine's defence, modern, fianchetto variation2035.0%67.5%
A00Amar (Paris) opening1050.0%35.0%
A00Amar gambit10.0%0.0%
A00Amsterdam attack10.0%100.0%
A00Anderssen's opening540.0%20.0%
A00Anti-Borg (Desprez) opening10.0%0.0%
A40Beefeater defence333.3%83.3%
A57Benko gambit5123.5%62.7%
A59Benko gambit10.0%0.0%
A58Benko gambit accepted6741.8%53.7%
A57Benko gambit half accepted8030.0%46.3%
A59Benko gambit, 7.e41100.0%50.0%
A57Benko gambit, Zaitsev system812.5%6.3%
A58Benko gambit, fianchetto variation1947.4%50.0%
A59Benko gambit, main line1428.6%64.3%
A00Benko's opening31737.2%51.4%
A00Benko's opening, reversed Alekhine944.4%44.4%
A56Benoni defence6729.9%55.2%
A60Benoni defence1330.8%69.2%
A61Benoni defence6918.8%71.7%
A56Benoni defence, Hromodka system1915.8%76.3%
A65Benoni, 6.e420.0%0.0%
A61Benoni, Nimzovich (knight's tour) variation4723.4%60.6%
A67Benoni, Taimanov variation40.0%100.0%
A61Benoni, Uhlmann variation850.0%50.0%
A78Benoni, classical with ...Re8 and ...Na6944.4%55.6%
A75Benoni, classical with ...a6 and 10...Bg4922.2%55.6%
A70Benoni, classical with e4 and Nf38427.4%55.4%
A70Benoni, classical without 9.O-O10.0%0.0%
A72Benoni, classical without 9.O-O812.5%81.3%
A79Benoni, classical, 11.f31241.7%54.2%
A71Benoni, classical, 8.Bg51513.3%46.7%
A76Benoni, classical, 9...Re81020.0%30.0%
A77Benoni, classical, 9...Re8, 10.Nd21921.1%68.4%
A74Benoni, classical, 9...a6, 10.a410.0%100.0%
A73Benoni, classical, 9.O-O70.0%71.4%
A61Benoni, fianchetto variation20.0%100.0%
A62Benoni, fianchetto variation5330.2%62.3%
A64Benoni, fianchetto, 11...Re81618.8%34.4%
A63Benoni, fianchetto, 9...Nbd7520.0%70.0%
A69Benoni, four pawns attack, main line955.6%50.0%
A02Bird's opening540.0%60.0%
A03Bird's opening425.0%37.5%
A02Bird, From gambit, Lasker variation10.0%100.0%
C23Bishop's opening6634.8%56.8%
C24Bishop's opening, Berlin defence8038.8%56.9%
C23Bishop's opening, Calabrese counter-gambit, Jaenisch variation30.0%100.0%
C23Bishop's opening, Classical variation2035.0%52.5%
C23Bishop's opening, Lisitsyn variation10.0%0.0%
C23Bishop's opening, Philidor counter-attack2864.3%64.3%
C23Bishop's opening, Philidor variation475.0%37.5%
C24Bishop's opening, Urusov gambit922.2%33.3%
D00Blackmar gambit580.0%40.0%
A45Blackmar-Diemer gambit911.1%50.0%
E10Blumenfeld counter-gambit1020.0%60.0%
E10Blumenfeld counter-gambit accepted922.2%33.3%
E10Blumenfeld counter-gambit, Dus-Chotimursky variation1947.4%50.0%
E10Blumenfeld counter-gambit, Spielmann variation40.0%25.0%
C27Boden-Kieseritsky gambit10.0%100.0%
C27Boden-Kieseritsky gambit, Lichtenhein defence1100.0%50.0%
E11Bogo-Indian defence11738.5%59.4%
E11Bogo-Indian defence, Gruenfeld variation14531.7%52.4%
E11Bogo-Indian defence, Nimzovich variation21633.3%54.2%
A51Budapest defence declined20.0%50.0%
A52Budapest, Adler variation850.0%25.0%
A52Budapest, Alekhine, Abonyi variation20.0%50.0%
A51Budapest, Fajarowicz variation50.0%60.0%
A52Budapest, Rubinstein variation850.0%62.5%
A45Canard opening1030.0%25.0%
B10Caro-Kann defence35434.2%57.2%
B12Caro-Kann defence5831.0%55.2%
B15Caro-Kann defence4131.7%47.6%
B12Caro-Kann, 3.Nd24643.5%54.3%
B15Caro-Kann, Alekhine gambit333.3%83.3%
B16Caro-Kann, Bronstein-Larsen variation2222.7%65.9%
B12Caro-Kann, Edinburgh variation450.0%25.0%
B15Caro-Kann, Forgacs variation4334.9%47.7%
B10Caro-Kann, Goldman (Spielmann) variation425.0%37.5%
B15Caro-Kann, Gurgenidze counter-attack20.0%50.0%
B15Caro-Kann, Gurgenidze system5635.7%58.9%
B13Caro-Kann, Panov-Botvinnik attack7051.4%48.6%
B14Caro-Kann, Panov-Botvinnik attack, 5...e634242.4%56.0%
B14Caro-Kann, Panov-Botvinnik attack, 5...g64047.5%51.3%
B13Caro-Kann, Panov-Botvinnik, Czerniak variation333.3%16.7%
B13Caro-Kann, Panov-Botvinnik, Gunderam attack20.0%50.0%
B13Caro-Kann, Panov-Botvinnik, Herzog defence10.0%0.0%
B13Caro-Kann, Panov-Botvinnik, normal variation812.5%68.8%
B15Caro-Kann, Rasa-Studier gambit450.0%25.0%
B17Caro-Kann, Steinitz variation43135.7%54.3%
B15Caro-Kann, Tartakower (Nimzovich) variation2236.4%59.1%
B12Caro-Kann, Tartakower (fantasy) variation11040.9%55.9%
B10Caro-Kann, Two knights variation4940.8%55.1%
B11Caro-Kann, Two knights, 3...Bg44030.0%57.5%
B12Caro-Kann, advance variation73133.1%56.4%
B12Caro-Kann, advance, Short variation450.0%75.0%
B10Caro-Kann, anti-Caro-Kann defence12128.9%59.9%
B10Caro-Kann, anti-anti-Caro-Kann defence10145.5%49.5%
B18Caro-Kann, classical variation7346.6%50.7%
B18Caro-Kann, classical, 6.h46432.8%55.5%
B19Caro-Kann, classical, 7...Nd7955.6%50.0%
B18Caro-Kann, classical, Flohr variation20.0%50.0%
B18Caro-Kann, classical, Maroczy attack250.0%25.0%
B19Caro-Kann, classical, Spassky variation66439.6%53.4%
B10Caro-Kann, closed (Breyer) variation3735.1%50.0%
B13Caro-Kann, exchange variation9246.7%50.5%
B13Caro-Kann, exchange, Rubinstein variation1428.6%35.7%
E00Catalan opening35740.1%55.3%
E01Catalan, closed3033.3%56.7%
E06Catalan, closed, 5.Nf337746.7%52.0%
E07Catalan, closed, 6...Nbd71225.0%29.2%
E08Catalan, closed, 7.Qc230.0%33.3%
E07Catalan, closed, Botvinnik variation825.0%50.0%
E08Catalan, closed, Qc2 & b32040.0%50.0%
E09Catalan, closed, main line2313.0%71.7%
E04Catalan, open, 5.Nf356739.3%51.1%
E02Catalan, open, 5.Qa41040.0%70.0%
E05Catalan, open, classical line2123.8%50.0%
C21Centre game4546.7%70.0%
C22Centre game333.3%16.7%
C22Centre game, Berger variation5623.2%70.5%
C22Centre game, Paulsen attack30.0%66.7%
A00Clemenz (Mead's, Basman's or de Klerk's) opening2100.0%50.0%
D05Colle system944.4%66.7%
A56Czech Benoni defence1931.6%78.9%
A56Czech Benoni, King's Indian system425.0%37.5%
C21Danish gambit250.0%75.0%
E10Doery defence933.3%50.0%
A00Dunst (Sleipner, Heinrichsen) opening540.0%60.0%
A00Durkin's attack450.0%25.0%
A80Dutch5131.4%64.7%
A81Dutch defence12834.4%56.3%
A84Dutch defence5433.3%57.4%
A90Dutch defence4330.2%59.3%
A91Dutch defence333.3%83.3%
A92Dutch defence10.0%100.0%
A81Dutch defence, Blackburne variation10.0%0.0%
A90Dutch defence, Dutch-Indian (Nimzo-Dutch) variation425.0%37.5%
A84Dutch defence, Rubinstein variation2740.7%50.0%
A85Dutch with c4 & Nc31020.0%60.0%
A86Dutch with c4 & g3450.0%25.0%
A80Dutch, 2.Bg5 variation1729.4%55.9%
A82Dutch, Balogh defence10.0%100.0%
A97Dutch, Ilyin-Genevsky variation10.0%100.0%
A98Dutch, Ilyin-Genevsky variation with Qc21100.0%50.0%
A99Dutch, Ilyin-Genevsky variation with b3560.0%70.0%
A97Dutch, Ilyin-Genevsky, Winter variation757.1%57.1%
A86Dutch, Leningrad variation650.0%58.3%
A87Dutch, Leningrad, main variation1662.5%62.5%
A89Dutch, Leningrad, main variation with Nc62433.3%66.7%
A88Dutch, Leningrad, main variation with c63426.5%72.1%
A80Dutch, Manhattan (Alapin, Ulvestad) variation1100.0%50.0%
A84Dutch, Staunton gambit deferred875.0%37.5%
A83Dutch, Staunton gambit, Staunton's line1100.0%50.0%
A82Dutch, Staunton gambit, Tartakower variation1100.0%50.0%
A96Dutch, classical variation1030.0%65.0%
A92Dutch, stonewall variation1100.0%50.0%
A94Dutch, stonewall with Ba33100.0%50.0%
A92Dutch, stonewall with Nc3333.3%50.0%
A95Dutch, stonewall with Nc3812.5%43.8%
A93Dutch, stonewall, Botwinnik variation825.0%50.0%
A90Dutch-Indian, Alekhine variation40.0%50.0%
E10Dzindzikhashvili defence887.5%56.3%
A10English opening33342.9%53.9%
A13English opening36234.0%50.7%
A15English opening73938.7%53.0%
A16English opening13028.5%52.7%
A17English opening3243.8%56.3%
A20English opening88240.0%54.8%
A21English opening21730.0%59.2%
A22English opening11531.3%55.7%
A13English opening, Agincourt variation11646.6%54.3%
A15English, 1...Nf6 (Anglo-Indian defense)14529.0%57.2%
A10English, Adorjan defence1650.0%56.3%
A10English, Anglo-Dutch defense3336.4%51.5%
A16English, Anglo-Gruenfeld defense742.9%50.0%
A16English, Anglo-Gruenfeld, Czech defense650.0%41.7%
A16English, Anglo-Gruenfeld, Smyslov defense560.0%70.0%
A12English, Bled variation520.0%90.0%
A26English, Botvinnik system3125.8%38.7%
A28English, Bradley Beach variation933.3%38.9%
A24English, Bremen system with ...g6850.0%62.5%
A23English, Bremen system, Keres variation2920.7%62.1%
A22English, Bremen, Smyslov system21534.4%47.9%
A22English, Bremen, reverse dragon10338.8%49.5%
A12English, Capablanca's variation1154.5%36.4%
A22English, Carls' Bremen system3435.3%61.8%
A11English, Caro-Kann defensive system6844.1%54.4%
A12English, Caro-Kann defensive system862.5%56.3%
A12English, Caro-Kann defensive system, Bogolyubov variation728.6%71.4%
A10English, Jaenisch gambit20.0%100.0%
A21English, Keres variation250.0%25.0%
A21English, Kramnik-Shirov counterattack7631.6%51.3%
A13English, Kurajica defence425.0%37.5%
A12English, London defensive system1030.0%25.0%
A18English, Mikenas-Carls variation10.0%100.0%
A18English, Mikenas-Carls, Flohr variation520.0%70.0%
A19English, Mikenas-Carls, Sicilian variation1936.8%44.7%
A28English, Nenarokov variation1145.5%68.2%
A13English, Neo-Catalan2740.7%68.5%
A13English, Neo-Catalan accepted3641.7%54.2%
A14English, Neo-Catalan declined2853.6%55.4%
A12English, New York (London) defensive system366.7%33.3%
A17English, Nimzo-English opening7230.6%59.7%
A20English, Nimzovich variation616.7%91.7%
A20English, Nimzovich, Flohr variation1526.7%40.0%
A17English, Queens Indian formation1338.5%50.0%
A17English, Queens Indian, Romanishin variation366.7%33.3%
A13English, Romanishin gambit785.7%57.1%
A25English, Sicilian reversed8931.5%48.3%
A21English, Smyslov defence520.0%30.0%
A14English, Symmetrical, Keres defence10850.9%55.1%
A12English, Torre defensive system1353.8%50.0%
A21English, Troeger defence1625.0%62.5%
A13English, Wimpey system1154.5%63.6%
A25English, closed system15535.5%57.1%
A26English, closed system3525.7%52.9%
A25English, closed system (without ...d6)2138.1%57.1%
A25English, closed, 5.Rb13551.4%54.3%
A25English, closed, 5.Rb1 Taimanov variation10.0%0.0%
A25English, closed, Hort variation250.0%25.0%
A28English, four knights system6246.8%49.2%
A28English, four knights, 4.e321434.6%54.2%
A28English, four knights, Capablanca variation4042.5%53.8%
A28English, four knights, Marini variation5444.4%46.3%
A28English, four knights, Nimzovich variation3534.3%42.9%
A28English, four knights, Romanishin variation8150.6%57.4%
A28English, four knights, Stean variation2138.1%61.9%
A29English, four knights, kingside fianchetto125037.5%51.8%
A30English, symmetrical variation71335.8%55.2%
A32English, symmetrical variation2035.0%62.5%
A33English, symmetrical variation16144.1%55.6%
A34English, symmetrical variation22134.4%56.1%
A35English, symmetrical variation3528.6%48.6%
A36English, symmetrical variation2420.8%68.8%
A37English, symmetrical variation3625.0%54.2%
A38English, symmetrical variation7544.0%47.3%
A31English, symmetrical, Benoni formation12044.2%58.8%
A36English, symmetrical, Botvinnik system742.9%50.0%
A36English, symmetrical, Botvinnik system reversed70.0%42.9%
A37English, symmetrical, Botvinnik system reversed6526.2%54.6%
A33English, symmetrical, Geller variation10530.5%56.2%
A34English, symmetrical, Rubinstein system1540.0%46.7%
A35English, symmetrical, four knights system27440.5%52.7%
A30English, symmetrical, hedgehog system45538.7%57.1%
A30English, symmetrical, hedgehog, flexible formation7443.2%56.8%
A38English, symmetrical, main line with b31100.0%50.0%
A38English, symmetrical, main line with d350.0%0.0%
A39English, symmetrical, main line with d48444.0%58.9%
A34English, symmetrical, three knights system8342.2%60.8%
A27English, three knights system3727.0%51.4%
A36English, ultra-symmetrical variation7525.3%46.0%
C52Evans gambit1030.0%55.0%
C51Evans gambit declined10.0%100.0%
C51Evans gambit declined, 5.a4520.0%50.0%
C51Evans gambit declined, Showalter variation10.0%0.0%
C51Evans gambit, 5...Be710.0%0.0%
C51Evans gambit, Cordel variation475.0%37.5%
C51Evans gambit, Goering attack10.0%0.0%
C52Evans gambit, Lasker defence20.0%0.0%
C51Evans gambit, Morphy attack540.0%20.0%
C51Evans gambit, Paulsen variation911.1%72.2%
C52Evans gambit, Richardson attack333.3%16.7%
C51Evans gambit, Stone-Ware variation250.0%75.0%
C52Evans gambit, compromised defence425.0%62.5%
C52Evans gambit, compromised defence, Paulsen variation955.6%50.0%
C51Evans gambit, normal variation10.0%0.0%
C49Four knights650.0%75.0%
C46Four knights game7048.6%51.4%
C48Four knights, Bardeleben variation1100.0%50.0%
C47Four knights, Belgrade gambit450.0%50.0%
C46Four knights, Gunsberg variation757.1%42.9%
C46Four knights, Italian variation2330.4%50.0%
C49Four knights, Nimzovich (Paulsen) variation4100.0%50.0%
C48Four knights, Ranken variation1100.0%50.0%
C48Four knights, Rubinstein counter-gambit15039.3%57.0%
C48Four knights, Rubinstein counter-gambit, Bogolyubov variation20.0%50.0%
C48Four knights, Rubinstein counter-gambit, Henneberger variation450.0%50.0%
C48Four knights, Rubinstein counter-gambit, exchange variation1181.8%59.1%
C47Four knights, Scotch variation450.0%50.0%
C47Four knights, Scotch, 4...exd44748.9%50.0%
C47Four knights, Scotch, Krause variation520.0%70.0%
C48Four knights, Spanish variation1266.7%50.0%
C48Four knights, Spanish, classical defence911.1%50.0%
C48Four knights, Spielmann variation10.0%0.0%
C49Four knights, double Ruy Lopez520.0%90.0%
C49Four knights, symmetrical variation3933.3%52.6%
C49Four knights, symmetrical, Capablanca variation333.3%50.0%
C49Four knights, symmetrical, Maroczy system1435.7%53.6%
C49Four knights, symmetrical, Metger unpin7138.0%54.2%
C49Four knights, symmetrical, Pillsbury variation30.0%33.3%
C00French defence13638.2%53.7%
C11French defence5127.5%47.1%
C00French defence, Steiner variation12544.8%50.4%
C00French, Alapin variation2100.0%50.0%
C13French, Albin-Alekhine-Chatard attack540.0%40.0%
C13French, Albin-Alekhine-Chatard attack, Spielmann variation20.0%100.0%
C11French, Burn variation75336.7%56.2%
C00French, Chigorin variation10338.8%53.4%
C10French, Fort Knox variation5335.8%50.0%
C10French, Frere (Becker) variation616.7%75.0%
C11French, Henneberger variation837.5%56.3%
C00French, King's Indian attack15032.7%51.7%
C00French, Labourdonnais variation11432.5%42.5%
C12French, MacCutcheon variation2740.7%50.0%
C12French, MacCutcheon, Chigorin variation10.0%0.0%
C12French, MacCutcheon, Dr. Olland (Dutch) variation40.0%100.0%
C12French, MacCutcheon, Grigoriev variation1100.0%50.0%
C12French, MacCutcheon, Janowski variation1338.5%65.4%
C12French, MacCutcheon, Lasker variation5425.9%48.1%
C12French, MacCutcheon, Lasker variation, 8...g69429.8%53.2%
C12French, MacCutcheon, advance variation1030.0%25.0%
C10French, Paulsen variation15529.0%56.5%
C00French, Pelikan variation3135.5%53.2%
C00French, Reti (Spielmann) variation850.0%50.0%
C10French, Rubinstein variation17944.7%57.0%
C00French, Schlechter variation7842.3%46.8%
C00French, Steinitz attack30.0%33.3%
C11French, Steinitz variation11933.6%56.3%
C11French, Steinitz, Boleslavsky variation30934.0%56.5%
C11French, Steinitz, Gledhill attack1100.0%50.0%
C11French, Swiss variation2835.7%53.6%
C03French, Tarrasch20041.0%58.5%
C05French, Tarrasch, Botvinnik variation333.3%50.0%
C07French, Tarrasch, Eliskases variation742.9%50.0%
C04French, Tarrasch, Guimard main line2326.1%52.2%
C03French, Tarrasch, Guimard variation1822.2%66.7%
C06French, Tarrasch, Leningrad variation425.0%87.5%
C05French, Tarrasch, closed variation12234.4%57.4%
C06French, Tarrasch, closed variation, main line31038.4%61.1%
C07French, Tarrasch, open variation46646.8%51.9%
C09French, Tarrasch, open variation, main line22952.0%57.9%
C08French, Tarrasch, open, 4.ed ed20750.2%54.6%
C00French, Two knights variation2638.5%50.0%
C15French, Winawer (Nimzovich) variation4938.8%54.1%
C15French, Winawer, Alekhine (Maroczy) gambit2437.5%56.3%
C15French, Winawer, Alekhine gambit, Kan variation1764.7%50.0%
C16French, Winawer, Petrosian variation2030.0%70.0%
C16French, Winawer, advance variation10729.9%64.5%
C17French, Winawer, advance variation1741.2%67.6%
C18French, Winawer, advance variation2725.9%64.8%
C17French, Winawer, advance, 5.a35523.6%66.4%
C19French, Winawer, advance, 6...Ne72948.3%51.7%
C17French, Winawer, advance, Bogolyubov variation11428.1%53.5%
C17French, Winawer, advance, Russian variation1040.0%40.0%
C19French, Winawer, advance, Smyslov variation3023.3%78.3%
C19French, Winawer, advance, poisoned pawn variation66131.3%58.8%
C19French, Winawer, advance, poisoned pawn, Euwe-Gligoric variation10.0%0.0%
C19French, Winawer, advance, poisoned pawn, Konstantinopolsky variation10617.9%64.6%
C19French, Winawer, advance, positional main line28528.4%54.9%
C18French, Winawer, classical variation4124.4%51.2%
C00French, Wing gambit425.0%62.5%
C02French, advance variation18126.5%54.7%
C02French, advance, Euwe variation14535.2%59.7%
C02French, advance, Milner-Barry gambit875.0%62.5%
C02French, advance, Nimzovich system850.0%37.5%
C02French, advance, Paulsen attack11729.9%52.6%
C02French, advance, Steinitz variation6227.4%36.3%
C02French, advance, Wade variation3020.0%63.3%
C13French, classical560.0%30.0%
C14French, classical variation1100.0%50.0%
C14French, classical, Alapin variation20.0%100.0%
C13French, classical, Anderssen variation40.0%50.0%
C13French, classical, Anderssen-Richter variation30.0%66.7%
C13French, classical, Frankfurt variation425.0%87.5%
C14French, classical, Rubinstein variation250.0%75.0%
C14