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
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%
A00Benko's opening31737.2%51.4%
A00Benko's opening, reversed Alekhine944.4%44.4%
A00Clemenz (Mead's, Basman's or de Klerk's) opening2100.0%50.0%
A00Dunst (Sleipner, Heinrichsen) opening540.0%60.0%
A00Durkin's attack450.0%25.0%
A00Grob's attack333.3%50.0%
A00Mieses opening1100.0%50.0%
A00Novosibirsk opening1100.0%50.0%
A00Polish (Sokolsky) opening2133.3%31.0%
A00Polish, Outflank variation425.0%62.5%
A00Saragossa opening862.5%68.8%
A00Van't Kruijs opening922.2%55.6%
A01Nimzovich-Larsen attack2317.4%43.5%
A01Nimzovich-Larsen attack, Dutch variation80.0%75.0%
A01Nimzovich-Larsen attack, English variation1127.3%59.1%
A01Nimzovich-Larsen attack, Indian variation2213.6%43.2%
A01Nimzovich-Larsen attack, classical variation3737.8%54.1%
A01Nimzovich-Larsen attack, modern variation9134.1%53.3%
A01Nimzovich-Larsen attack, symmetrical variation30.0%33.3%
A02Bird's opening540.0%60.0%
A02Bird, From gambit, Lasker variation10.0%100.0%
A03Bird's opening425.0%37.5%
A04Reti opening107336.9%53.7%
A04Reti v Dutch6025.0%60.8%
A04Reti, Lisitsin gambit deferred250.0%25.0%
A04Reti, Pirc-Lisitsin gambit1241.7%70.8%
A05Reti opening58238.0%55.8%
A05Reti, King's Indian attack8447.6%51.2%
A05Reti, King's Indian attack, Reti-Smyslov variation1145.5%50.0%
A05Reti, King's Indian attack, Spassky's variation4932.7%53.1%
A06Reti opening21638.0%50.9%
A06Reti, Nimzovich-Larsen attack18433.2%47.6%
A06Reti, old Indian attack2133.3%40.5%
A06Santasiere's folly1323.1%50.0%
A06Tennison (Lemberg, Zukertort) gambit10.0%100.0%
A07Reti, King's Indian attack6732.8%46.3%
A07Reti, King's Indian attack (Barcza system)60141.3%54.7%
A07Reti, King's Indian attack (with ...c5)5444.4%51.9%
A07Reti, King's Indian attack, Keres variation4744.7%43.6%
A07Reti, King's Indian attack, Pachman system728.6%57.1%
A07Reti, King's Indian attack, Yugoslav variation22036.8%47.5%
A08Reti, King's Indian attack6134.4%54.9%
A08Reti, King's Indian attack, French variation1323.1%42.3%
A09Reti accepted3348.5%48.5%
A09Reti accepted, Keres variation922.2%77.8%
A09Reti opening2245.5%54.5%
A09Reti, advance variation7343.8%47.9%
A10English opening33342.9%53.9%
A10English, Adorjan defence1650.0%56.3%
A10English, Anglo-Dutch defense3336.4%51.5%
A10English, Jaenisch gambit20.0%100.0%
A11English, Caro-Kann defensive system6844.1%54.4%
A12English, Bled variation520.0%90.0%
A12English, Capablanca's variation1154.5%36.4%
A12English, Caro-Kann defensive system862.5%56.3%
A12English, Caro-Kann defensive system, Bogolyubov variation728.6%71.4%
A12English, London defensive system1030.0%25.0%
A12English, New York (London) defensive system366.7%33.3%
A12English, Torre defensive system1353.8%50.0%
A13English opening36234.0%50.7%
A13English opening, Agincourt variation11646.6%54.3%
A13English, Kurajica defence425.0%37.5%
A13English, Neo-Catalan2740.7%68.5%
A13English, Neo-Catalan accepted3641.7%54.2%
A13English, Romanishin gambit785.7%57.1%
A13English, Wimpey system1154.5%63.6%
A14English, Neo-Catalan declined2853.6%55.4%
A14English, Symmetrical, Keres defence10850.9%55.1%
A15English opening73938.7%53.0%
A15English, 1...Nf6 (Anglo-Indian defense)14529.0%57.2%
A16English opening13028.5%52.7%
A16English, Anglo-Gruenfeld defense742.9%50.0%
A16English, Anglo-Gruenfeld, Czech defense650.0%41.7%
A16English, Anglo-Gruenfeld, Smyslov defense560.0%70.0%
A17English opening3243.8%56.3%
A17English, Nimzo-English opening7230.6%59.7%
A17English, Queens Indian formation1338.5%50.0%
A17English, Queens Indian, Romanishin variation366.7%33.3%
A18English, Mikenas-Carls variation10.0%100.0%
A18English, Mikenas-Carls, Flohr variation520.0%70.0%
A19English, Mikenas-Carls, Sicilian variation1936.8%44.7%
A20English opening88240.0%54.8%
A20English, Nimzovich variation616.7%91.7%
A20English, Nimzovich, Flohr variation1526.7%40.0%
A21English opening21730.0%59.2%
A21English, Keres variation250.0%25.0%
A21English, Kramnik-Shirov counterattack7631.6%51.3%
A21English, Smyslov defence520.0%30.0%
A21English, Troeger defence1625.0%62.5%
A22English opening11531.3%55.7%
A22English, Bremen, Smyslov system21534.4%47.9%
A22English, Bremen, reverse dragon10338.8%49.5%
A22English, Carls' Bremen system3435.3%61.8%
A23English, Bremen system, Keres variation2920.7%62.1%
A24English, Bremen system with ...g6850.0%62.5%
A25English, Sicilian reversed8931.5%48.3%
A25English, closed system15535.5%57.1%
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%
A26English, Botvinnik system3125.8%38.7%
A26English, closed system3525.7%52.9%
A27English, three knights system3727.0%51.4%
A28English, Bradley Beach variation933.3%38.9%
A28English, Nenarokov variation1145.5%68.2%
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%
A30English, symmetrical, hedgehog system45538.7%57.1%
A30English, symmetrical, hedgehog, flexible formation7443.2%56.8%
A31English, symmetrical, Benoni formation12044.2%58.8%
A32English, symmetrical variation2035.0%62.5%
A33English, symmetrical variation16144.1%55.6%
A33English, symmetrical, Geller variation10530.5%56.2%
A34English, symmetrical variation22134.4%56.1%
A34English, symmetrical, Rubinstein system1540.0%46.7%
A34English, symmetrical, three knights system8342.2%60.8%
A35English, symmetrical variation3528.6%48.6%
A35English, symmetrical, four knights system27440.5%52.7%
A36English, symmetrical variation2420.8%68.8%
A36English, symmetrical, Botvinnik system742.9%50.0%
A36English, symmetrical, Botvinnik system reversed70.0%42.9%
A36English, ultra-symmetrical variation7525.3%46.0%
A37English, symmetrical variation3625.0%54.2%
A37English, symmetrical, Botvinnik system reversed6526.2%54.6%
A38English, symmetrical variation7544.0%47.3%
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%
A40Beefeater defence333.3%83.3%
A40Modern defence4626.1%69.6%
A40Polish defence580.0%60.0%
A40Queen's pawn60838.3%56.0%
A40Queen's pawn, Charlick (Englund) gambit1100.0%50.0%
A40Queen's pawn, English defence1625.0%68.8%
A40Queen's pawn, Franco-Indian (Keres) defence9240.2%54.9%
A40Queen's pawn, Keres defence15736.3%58.3%
A40Queen's pawn, Lundin (Kevitz-Mikenas) defence1612.5%62.5%
A41Old Indian defence3534.3%62.9%
A41Old Indian, Tartakower (Wade) variation4835.4%59.4%
A41Queen's Pawn6431.3%51.6%
A41Robatsch defence, Rossolimo variation837.5%56.3%
A42Modern defence, Averbakh system1442.9%64.3%
A42Modern defence, Averbakh system, Kotov variation10.0%100.0%
A42Pterodactyl defence1850.0%63.9%
A43Hawk (Habichd) defence10.0%0.0%
A43Old Benoni defence7828.2%59.0%
A43Old Benoni, Franco-Benoni defence250.0%25.0%
A43Old Benoni, Mujannah formation425.0%87.5%
A43Old Benoni, Schmid's system20.0%0.0%
A44Old Benoni defence4100.0%50.0%
A44Semi-Benoni (`blockade variation')250.0%75.0%
A45Blackmar-Diemer gambit911.1%50.0%
A45Canard opening1030.0%25.0%
A45Queen's pawn game40938.6%53.1%
A45Trompovsky attack (Ruth, Opovcensky opening)21632.9%52.5%
A46Queen's pawn game36132.4%56.4%
A46Queen's pawn, Torre attack5641.1%49.1%
A46Queen's pawn, Torre attack, Wagner gambit10.0%100.0%
A46Queen's pawn, Yusupov-Rubinstein system4438.6%62.5%
A47Queen's Indian defence8936.0%59.6%
A47Queen's Indian, Marienbad system1931.6%57.9%
A47Queen's Indian, Marienbad system, Berg variation333.3%50.0%
A48King's Indian, East Indian defence16336.8%50.3%
A48King's Indian, London system7241.7%50.0%
A48King's Indian, Torre attack12631.7%55.6%
A49King's Indian, fianchetto without c414635.6%58.9%
A50Kevitz-Trajkovich defence4143.9%48.8%
A50Queen's Indian accelerated2231.8%52.3%
A50Queen's pawn game10329.1%60.2%
A51Budapest defence declined20.0%50.0%
A51Budapest, Fajarowicz variation50.0%60.0%
A52Budapest, Adler variation850.0%25.0%
A52Budapest, Alekhine, Abonyi variation20.0%50.0%
A52Budapest, Rubinstein variation850.0%62.5%
A53Old Indian defence14032.1%59.6%
A53Old Indian, Janowski variation922.2%66.7%
A54Old Indian, Ukrainian variation1060.0%70.0%
A54Old Indian, Ukrainian variation, 4.Nf31145.5%59.1%
A55Old Indian, main line6446.9%60.9%
A56Benoni defence6729.9%55.2%
A56Benoni defence, Hromodka system1915.8%76.3%
A56Czech Benoni defence1931.6%78.9%
A56Czech Benoni, King's Indian system425.0%37.5%
A56Vulture defence1100.0%50.0%
A57Benko gambit5123.5%62.7%
A57Benko gambit half accepted8030.0%46.3%
A57Benko gambit, Zaitsev system812.5%6.3%
A58Benko gambit accepted6741.8%53.7%
A58Benko gambit, fianchetto variation1947.4%50.0%
A59Benko gambit10.0%0.0%
A59Benko gambit, 7.e41100.0%50.0%
A59Benko gambit, main line1428.6%64.3%
A60Benoni defence1330.8%69.2%
A61Benoni defence6918.8%71.7%
A61Benoni, Nimzovich (knight's tour) variation4723.4%60.6%
A61Benoni, Uhlmann variation850.0%50.0%
A61Benoni, fianchetto variation20.0%100.0%
A62Benoni, fianchetto variation5330.2%62.3%
A63Benoni, fianchetto, 9...Nbd7520.0%70.0%
A64Benoni, fianchetto, 11...Re81618.8%34.4%
A65Benoni, 6.e420.0%0.0%
A67Benoni, Taimanov variation40.0%100.0%
A69Benoni, four pawns attack, main line955.6%50.0%
A70Benoni, classical with e4 and Nf38427.4%55.4%
A70Benoni, classical without 9.O-O10.0%0.0%
A71Benoni, classical, 8.Bg51513.3%46.7%
A72Benoni, classical without 9.O-O812.5%81.3%
A73Benoni, classical, 9.O-O70.0%71.4%
A74Benoni, classical, 9...a6, 10.a410.0%100.0%
A75Benoni, classical with ...a6 and 10...Bg4922.2%55.6%
A76Benoni, classical, 9...Re81020.0%30.0%
A77Benoni, classical, 9...Re8, 10.Nd21921.1%68.4%
A78Benoni, classical with ...Re8 and ...Na6944.4%55.6%
A79Benoni, classical, 11.f31241.7%54.2%
A80Dutch5131.4%64.7%
A80Dutch, 2.Bg5 variation1729.4%55.9%
A80Dutch, Manhattan (Alapin, Ulvestad) variation1100.0%50.0%
A81Dutch defence12834.4%56.3%
A81Dutch defence, Blackburne variation10.0%0.0%
A82Dutch, Balogh defence10.0%100.0%
A82Dutch, Staunton gambit, Tartakower variation1100.0%50.0%
A83Dutch, Staunton gambit, Staunton's line1100.0%50.0%
A84Dutch defence5433.3%57.4%
A84Dutch defence, Rubinstein variation2740.7%50.0%
A84Dutch, Staunton gambit deferred875.0%37.5%
A85Dutch with c4 & Nc31020.0%60.0%
A86Dutch with c4 & g3450.0%25.0%
A86Dutch, Leningrad variation650.0%58.3%
A87Dutch, Leningrad, main variation1662.5%62.5%
A88Dutch, Leningrad, main variation with c63426.5%72.1%
A89Dutch, Leningrad, main variation with Nc62433.3%66.7%
A90Dutch defence4330.2%59.3%
A90Dutch defence, Dutch-Indian (Nimzo-Dutch) variation425.0%37.5%
A90Dutch-Indian, Alekhine variation40.0%50.0%
A91Dutch defence333.3%83.3%
A92Dutch defence10.0%100.0%
A92Dutch, stonewall variation1100.0%50.0%
A92Dutch, stonewall with Nc3333.3%50.0%
A93Dutch, stonewall, Botwinnik variation825.0%50.0%
A94Dutch, stonewall with Ba33100.0%50.0%
A95Dutch, stonewall with Nc3812.5%43.8%
A96Dutch, classical variation1030.0%65.0%
A97Dutch, Ilyin-Genevsky variation10.0%100.0%
A97Dutch, Ilyin-Genevsky, Winter variation757.1%57.1%
A98Dutch, Ilyin-Genevsky variation with Qc21100.0%50.0%
A99Dutch, Ilyin-Genevsky variation with b3560.0%70.0%
B00KP, Nimzovich defence2240.9%61.4%
B00KP, Nimzovich defence, Bogolyubov variation520.0%70.0%
B00King's pawn opening11326.5%58.4%
B00Lemming defence250.0%25.0%
B00Owen defence3333.3%65.2%
B00Reversed Grob (Borg/Basman defence/macho Grob)425.0%87.5%
B01Scandinavian (centre counter) defence8740.2%56.9%
B01Scandinavian defence3732.4%54.1%
B01Scandinavian defence, Gruenfeld variation20.0%50.0%
B01Scandinavian defence, Lasker variation1338.5%65.4%
B01Scandinavian gambit1553.3%60.0%
B01Scandinavian, Anderssen counter-attack orthodox attack10.0%100.0%
B01Scandinavian, Anderssen counter-attack, Collijn variation10.0%100.0%
B01Scandinavian, Icelandic gambit1050.0%55.0%
B01Scandinavian, Marshall variation8341.0%63.9%
B01Scandinavian, Pytel-Wade variation2152.4%54.8%
B02Alekhine's defence1010.0%35.0%
B02Alekhine's defence, Brooklyn defence520.0%30.0%
B02Alekhine's defence, Maroczy variation1330.8%53.8%
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 defence450.0%75.0%
B03Alekhine's defence, Balogh variation10.0%100.0%
B03Alekhine's defence, O'Sullivan gambit366.7%66.7%
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%
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%
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%
B06Robatsch (modern) defence19328.5%57.8%
B06Robatsch defence2737.0%51.9%
B06Robatsch defence, Gurgenidze variation30.0%66.7%
B06Robatsch defence, Pseudo-Austrian attack2218.2%72.7%
B06Robatsch defence, Two knights variation40.0%75.0%
B06Robatsch defence, Two knights, Suttles variation4837.5%56.3%
B06Robatsch defence, three pawns attack1100.0%50.0%
B07Pirc defence7328.8%52.7%
B07Pirc, 150 attack5341.5%58.5%
B07Pirc, Byrne variation3148.4%59.7%
B07Pirc, Holmov system2100.0%50.0%
B07Pirc, Sveshnikov system2634.6%44.2%
B07Pirc, Ufimtsev-Pytel variation4431.8%54.5%
B07Pirc, bayonet (Mariotti) attack2100.0%50.0%
B07Robatsch defence, Geller's system3633.3%63.9%
B08Pirc, classical (two knights) system4332.6%62.8%
B08Pirc, classical system, 5.Be213933.1%54.7%
B08Pirc, classical, h3 system3748.6%48.6%
B09Pirc, Austrian attack1435.7%53.6%
B09Pirc, Austrian attack, 6.Bd34740.4%45.7%
B09Pirc, Austrian attack, 6.Be3922.2%66.7%
B09Pirc, Austrian attack, 6.e5560.0%50.0%
B09Pirc, Austrian attack, Ljubojevic variation10.0%0.0%
B09Pirc, Austrian attack, dragon formation2650.0%67.3%
B10Caro-Kann defence35434.2%57.2%
B10Caro-Kann, Goldman (Spielmann) variation425.0%37.5%
B10Caro-Kann, Two knights variation4940.8%55.1%
B10Caro-Kann, anti-Caro-Kann defence12128.9%59.9%
B10Caro-Kann, anti-anti-Caro-Kann defence10145.5%49.5%
B10Caro-Kann, closed (Breyer) variation3735.1%50.0%
B11Caro-Kann, Two knights, 3...Bg44030.0%57.5%
B12Caro-Kann defence5831.0%55.2%
B12Caro-Kann, 3.Nd24643.5%54.3%
B12Caro-Kann, Edinburgh variation450.0%25.0%
B12Caro-Kann, Tartakower (fantasy) variation11040.9%55.9%
B12Caro-Kann, advance variation73133.1%56.4%
B12Caro-Kann, advance, Short variation450.0%75.0%
B12de Bruycker defence30.0%66.7%
B13Caro-Kann, Panov-Botvinnik attack7051.4%48.6%
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%
B13Caro-Kann, exchange variation9246.7%50.5%
B13Caro-Kann, exchange, Rubinstein variation1428.6%35.7%
B14Caro-Kann, Panov-Botvinnik attack, 5...e634242.4%56.0%
B14Caro-Kann, Panov-Botvinnik attack, 5...g64047.5%51.3%
B15Caro-Kann defence4131.7%47.6%
B15Caro-Kann, Alekhine gambit333.3%83.3%
B15Caro-Kann, Forgacs variation4334.9%47.7%
B15Caro-Kann, Gurgenidze counter-attack20.0%50.0%
B15Caro-Kann, Gurgenidze system5635.7%58.9%
B15Caro-Kann, Rasa-Studier gambit450.0%25.0%
B15Caro-Kann, Tartakower (Nimzovich) variation2236.4%59.1%
B16Caro-Kann, Bronstein-Larsen variation2222.7%65.9%
B17Caro-Kann, Steinitz variation43135.7%54.3%
B18Caro-Kann, classical variation7346.6%50.7%
B18Caro-Kann, classical, 6.h46432.8%55.5%
B18Caro-Kann, classical, Flohr variation20.0%50.0%
B18Caro-Kann, classical, Maroczy attack250.0%25.0%
B19Caro-Kann, classical, 7...Nd7955.6%50.0%
B19Caro-Kann, classical, Spassky variation66439.6%53.4%
B20Sicilian defence31234.3%49.2%
B20Sicilian, Keres variation (2.Ne2)4341.9%58.1%
B20Sicilian, Steinitz variation12445.2%46.8%
B20Sicilian, wing gambit250.0%75.0%
B20Sicilian, wing gambit, Carlsbad variation20.0%50.0%
B21Sicilian, Grand Prix attack17236.0%51.7%
B21Sicilian, Smith-Morra gambit1952.6%57.9%
B22Sicilian, 2.c3, Heidenfeld variation250.0%75.0%
B22Sicilian, Alapin's variation (2.c3)71538.5%53.6%
B23Sicilian, Grand Prix attack5529.1%50.9%
B23Sicilian, Grand Prix attack, Schofman variation450.0%50.0%
B23Sicilian, chameleon variation4339.5%61.6%
B23Sicilian, closed39832.2%52.8%
B23Sicilian, closed, 2...Nc613039.2%53.5%
B23Sicilian, closed, Korchnoi variation540.0%40.0%
B24Sicilian, closed4037.5%48.8%
B25Sicilian, closed2035.0%67.5%
B25Sicilian, closed, 6.Ne2 e5 (Botvinnik)850.0%50.0%
B25Sicilian, closed, 6.f43528.6%48.6%
B25Sicilian, closed, 6.f4 e5 (Botvinnik)450.0%75.0%
B26Sicilian, closed, 6.Be34932.7%42.9%
B27Sicilian defence250.0%75.0%
B27Sicilian, Hungarian variation15834.2%57.0%
B27Sicilian, Katalimov variation475.0%37.5%
B27Sicilian, Quinteros variation425.0%87.5%
B28Sicilian, O'Kelly variation1154.5%63.6%
B29Sicilian, Nimzovich-Rubinstein variation1233.3%66.7%
B29Sicilian, Nimzovich-Rubinstein; Rubinstein counter-gambit1216.7%41.7%
B30Sicilian defence30438.5%50.5%
B30Sicilian, Nimzovich-Rossolimo attack (without ...d6)37835.2%53.3%
B31Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6)31536.2%55.9%