KCEC
(Kirr's Chess Engine Comparison)
A tournament of original free chess engines
June 16, 2013
|
Testing summary:
Total: 135,679 gamesplayed 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% |
This page shows how many KCEC games were played from various known openings. The table also shows average draw percentage and white score.
| ECO | Opening | Number of games | Draws | White score |
| C20 | Alapin's opening | 31 | 22.6% | 46.8% |
| B02 | Alekhine's defence | 17 | 11.8% | 47.1% |
| B03 | Alekhine's defence | 184 | 20.1% | 53.0% |
| B02 | Alekhine's defence, Brooklyn defence | 4 | 75.0% | 62.5% |
| B02 | Alekhine's defence, Maroczy variation | 9 | 44.4% | 55.6% |
| B02 | Alekhine's defence, Mokele Mbembe (Buecker) variation | 3 | 33.3% | 50.0% |
| B03 | Alekhine's defence, O'Sullivan gambit | 2 | 0.0% | 50.0% |
| B02 | Alekhine's defence, Saemisch attack | 11 | 0.0% | 63.6% |
| B02 | Alekhine's defence, Scandinavian variation | 11 | 18.2% | 54.5% |
| B02 | Alekhine's defence, Steiner variation | 1 | 0.0% | 0.0% |
| B02 | Alekhine's defence, Two pawns' (Lasker's) attack | 16 | 31.3% | 40.6% |
| B03 | Alekhine's defence, exchange variation | 25 | 16.0% | 56.0% |
| B03 | Alekhine's defence, four pawns attack | 4 | 0.0% | 50.0% |
| B03 | Alekhine's defence, four pawns attack, 7.Be3 | 3 | 33.3% | 50.0% |
| B03 | Alekhine's defence, four pawns attack, Planinc variation | 2 | 0.0% | 100.0% |
| B03 | Alekhine's defence, four pawns attack, Trifunovic variation | 3 | 0.0% | 0.0% |
| B03 | Alekhine's defence, four pawns attack, fianchetto variation | 1 | 0.0% | 100.0% |
| B04 | Alekhine's defence, modern variation | 27 | 18.5% | 53.7% |
| B05 | Alekhine's defence, modern variation, 4...Bg4 | 14 | 42.9% | 64.3% |
| B05 | Alekhine's defence, modern, Flohr variation | 15 | 20.0% | 50.0% |
| B04 | Alekhine's defence, modern, Keres variation | 4 | 0.0% | 100.0% |
| B04 | Alekhine's defence, modern, Larsen variation | 21 | 14.3% | 40.5% |
| B05 | Alekhine's defence, modern, Panov variation | 1 | 0.0% | 100.0% |
| B04 | Alekhine's defence, modern, Schmid variation | 8 | 0.0% | 75.0% |
| B04 | Alekhine's defence, modern, fianchetto variation | 29 | 24.1% | 53.4% |
| A00 | Amsterdam attack | 3 | 33.3% | 83.3% |
| A57 | Benko gambit | 42 | 14.3% | 47.6% |
| A58 | Benko gambit accepted | 31 | 19.4% | 51.6% |
| A57 | Benko gambit half accepted | 34 | 23.5% | 50.0% |
| A59 | Benko gambit, 7.e4 | 1 | 100.0% | 50.0% |
| A57 | Benko gambit, Zaitsev system | 4 | 25.0% | 37.5% |
| A58 | Benko gambit, fianchetto variation | 5 | 20.0% | 70.0% |
| A00 | Benko's opening | 693 | 22.7% | 51.4% |
| A00 | Benko's opening, reversed Alekhine | 4 | 25.0% | 12.5% |
| A56 | Benoni defence | 60 | 21.7% | 54.2% |
| A60 | Benoni defence | 19 | 10.5% | 47.4% |
| A61 | Benoni defence | 46 | 17.4% | 63.0% |
| A56 | Benoni defence, Hromodka system | 332 | 16.0% | 59.8% |
| A65 | Benoni, 6.e4 | 5 | 40.0% | 40.0% |
| A61 | Benoni, Nimzovich (knight's tour) variation | 13 | 0.0% | 69.2% |
| A67 | Benoni, Taimanov variation | 2 | 0.0% | 50.0% |
| A61 | Benoni, Uhlmann variation | 8 | 25.0% | 62.5% |
| A70 | Benoni, classical with e4 and Nf3 | 34 | 20.6% | 57.4% |
| A70 | Benoni, classical without 9.O-O | 1 | 0.0% | 100.0% |
| A72 | Benoni, classical without 9.O-O | 4 | 0.0% | 75.0% |
| A71 | Benoni, classical, 8.Bg5 | 1 | 0.0% | 100.0% |
| A76 | Benoni, classical, 9...Re8 | 10 | 0.0% | 60.0% |
| A77 | Benoni, classical, 9...Re8, 10.Nd2 | 1 | 100.0% | 50.0% |
| A73 | Benoni, classical, 9.O-O | 5 | 0.0% | 40.0% |
| A61 | Benoni, fianchetto variation | 6 | 33.3% | 33.3% |
| A62 | Benoni, fianchetto variation | 54 | 7.4% | 66.7% |
| A63 | Benoni, fianchetto, 9...Nbd7 | 3 | 33.3% | 50.0% |
| A68 | Benoni, four pawns attack | 1 | 0.0% | 0.0% |
| A69 | Benoni, four pawns attack, main line | 3 | 0.0% | 33.3% |
| A02 | Bird's opening | 41 | 14.6% | 48.8% |
| A03 | Bird's opening | 39 | 12.8% | 44.9% |
| A03 | Bird's opening, Lasker variation | 2 | 50.0% | 75.0% |
| A02 | Bird's opening, Swiss gambit | 8 | 12.5% | 56.3% |
| A02 | Bird, From gambit | 1 | 0.0% | 100.0% |
| C23 | Bishop's opening | 51 | 19.6% | 47.1% |
| C24 | Bishop's opening, Berlin defence | 99 | 19.2% | 53.0% |
| C23 | Bishop's opening, Classical variation | 15 | 13.3% | 40.0% |
| C23 | Bishop's opening, Lewis counter-gambit | 1 | 0.0% | 0.0% |
| C23 | Bishop's opening, Lewis gambit | 2 | 50.0% | 25.0% |
| C23 | Bishop's opening, Philidor counter-attack | 1 | 0.0% | 100.0% |
| C23 | Bishop's opening, Philidor variation | 6 | 33.3% | 50.0% |
| C24 | Bishop's opening, Ponziani gambit | 6 | 16.7% | 75.0% |
| C24 | Bishop's opening, Urusov gambit | 4 | 25.0% | 37.5% |
| C24 | Bishop's opening, Urusov gambit, Panov variation | 5 | 20.0% | 50.0% |
| A45 | Blackmar-Diemer gambit | 13 | 23.1% | 50.0% |
| D00 | Blackmar-Diemer gambit | 1 | 0.0% | 100.0% |
| D00 | Blackmar-Diemer, Euwe defence | 1 | 100.0% | 50.0% |
| E10 | Blumenfeld counter-gambit | 23 | 17.4% | 60.9% |
| E10 | Blumenfeld counter-gambit accepted | 14 | 21.4% | 39.3% |
| E10 | Blumenfeld counter-gambit, Dus-Chotimursky variation | 19 | 31.6% | 52.6% |
| C27 | Boden-Kieseritsky gambit | 14 | 0.0% | 50.0% |
| E11 | Bogo-Indian defence | 241 | 28.2% | 49.4% |
| E11 | Bogo-Indian defence, Gruenfeld variation | 159 | 25.2% | 55.3% |
| E11 | Bogo-Indian defence, Nimzovich variation | 306 | 20.6% | 58.3% |
| A52 | Budapest defence | 4 | 0.0% | 100.0% |
| A51 | Budapest defence declined | 9 | 33.3% | 72.2% |
| A52 | Budapest, Adler variation | 31 | 29.0% | 62.9% |
| A52 | Budapest, Alekhine variation | 2 | 50.0% | 25.0% |
| A52 | Budapest, Alekhine, Abonyi variation | 4 | 25.0% | 87.5% |
| A51 | Budapest, Fajarowicz variation | 14 | 14.3% | 78.6% |
| A52 | Budapest, Rubinstein variation | 36 | 22.2% | 58.3% |
| A45 | Canard opening | 1 | 100.0% | 50.0% |
| B10 | Caro-Kann defence | 377 | 23.9% | 54.6% |
| B12 | Caro-Kann defence | 273 | 22.0% | 57.5% |
| B15 | Caro-Kann defence | 120 | 19.2% | 48.8% |
| B12 | Caro-Kann, 3.Nd2 | 82 | 19.5% | 56.1% |
| B15 | Caro-Kann, Alekhine gambit | 6 | 16.7% | 58.3% |
| B16 | Caro-Kann, Bronstein-Larsen variation | 21 | 23.8% | 64.3% |
| B12 | Caro-Kann, Edinburgh variation | 7 | 0.0% | 85.7% |
| B15 | Caro-Kann, Forgacs variation | 12 | 41.7% | 54.2% |
| B10 | Caro-Kann, Goldman (Spielmann) variation | 4 | 25.0% | 37.5% |
| B15 | Caro-Kann, Gurgenidze counter-attack | 2 | 0.0% | 100.0% |
| B15 | Caro-Kann, Gurgenidze system | 98 | 22.4% | 55.1% |
| B13 | Caro-Kann, Panov-Botvinnik attack | 180 | 22.8% | 54.7% |
| B14 | Caro-Kann, Panov-Botvinnik attack, 5...e6 | 485 | 27.6% | 52.4% |
| B14 | Caro-Kann, Panov-Botvinnik attack, 5...g6 | 53 | 24.5% | 51.9% |
| B13 | Caro-Kann, Panov-Botvinnik, Czerniak variation | 11 | 81.8% | 59.1% |
| B13 | Caro-Kann, Panov-Botvinnik, Herzog defence | 6 | 16.7% | 41.7% |
| B13 | Caro-Kann, Panov-Botvinnik, normal variation | 35 | 25.7% | 52.9% |
| B17 | Caro-Kann, Steinitz variation | 1341 | 25.0% | 54.1% |
| B15 | Caro-Kann, Tartakower (Nimzovich) variation | 35 | 37.1% | 55.7% |
| B12 | Caro-Kann, Tartakower (fantasy) variation | 48 | 29.2% | 56.3% |
| B10 | Caro-Kann, Two knights variation | 75 | 28.0% | 55.3% |
| B11 | Caro-Kann, Two knights, 3...Bg4 | 100 | 19.0% | 49.5% |
| B12 | Caro-Kann, advance variation | 1093 | 22.6% | 51.7% |
| B12 | Caro-Kann, advance, Short variation | 11 | 36.4% | 63.6% |
| B10 | Caro-Kann, anti-Caro-Kann defence | 182 | 19.2% | 51.9% |
| B10 | Caro-Kann, anti-anti-Caro-Kann defence | 260 | 26.9% | 53.1% |
| B18 | Caro-Kann, classical variation | 138 | 19.6% | 52.5% |
| B18 | Caro-Kann, classical, 6.h4 | 200 | 24.5% | 59.3% |
| B19 | Caro-Kann, classical, 7...Nd7 | 12 | 25.0% | 54.2% |
| B18 | Caro-Kann, classical, Flohr variation | 8 | 0.0% | 62.5% |
| B19 | Caro-Kann, classical, Spassky variation | 1545 | 24.7% | 60.3% |
| B10 | Caro-Kann, closed (Breyer) variation | 145 | 25.5% | 49.3% |
| B13 | Caro-Kann, exchange variation | 129 | 20.9% | 54.7% |
| B13 | Caro-Kann, exchange, Rubinstein variation | 12 | 41.7% | 54.2% |
| B12 | Caro-Masi defence | 10 | 20.0% | 50.0% |
| E00 | Catalan opening | 380 | 27.1% | 52.2% |
| E01 | Catalan, closed | 49 | 24.5% | 51.0% |
| E06 | Catalan, closed, 5.Nf3 | 636 | 28.9% | 51.4% |
| E07 | Catalan, closed, 6...Nbd7 | 14 | 28.6% | 50.0% |
| E08 | Catalan, closed, 7.Qc2 | 2 | 0.0% | 100.0% |
| E07 | Catalan, closed, Botvinnik variation | 34 | 14.7% | 72.1% |
| E08 | Catalan, closed, Qc2 & b3 | 45 | 17.8% | 46.7% |
| E09 | Catalan, closed, main line | 76 | 28.9% | 56.6% |
| E04 | Catalan, open, 5.Nf3 | 910 | 26.5% | 50.7% |
| E02 | Catalan, open, 5.Qa4 | 6 | 50.0% | 41.7% |
| E05 | Catalan, open, classical line | 99 | 29.3% | 57.1% |
| C21 | Centre game | 4 | 25.0% | 62.5% |
| C22 | Centre game | 10 | 40.0% | 70.0% |
| C22 | Centre game, Berger variation | 24 | 20.8% | 52.1% |
| C22 | Centre game, Charousek variation | 2 | 0.0% | 100.0% |
| C22 | Centre game, Paulsen attack | 7 | 0.0% | 57.1% |
| D05 | Colle system | 19 | 31.6% | 57.9% |
| A56 | Czech Benoni defence | 20 | 35.0% | 57.5% |
| A56 | Czech Benoni, King's Indian system | 4 | 25.0% | 87.5% |
| C21 | Danish gambit | 2 | 50.0% | 75.0% |
| C21 | Danish gambit, Collijn defence | 2 | 0.0% | 0.0% |
| C21 | Danish gambit, Soerensen defence | 3 | 0.0% | 100.0% |
| C44 | Dresden opening | 18 | 27.8% | 36.1% |
| A00 | Dunst (Sleipner, Heinrichsen) opening | 168 | 21.4% | 51.2% |
| A80 | Dutch | 205 | 24.9% | 52.9% |
| A81 | Dutch defence | 223 | 24.7% | 59.9% |
| A84 | Dutch defence | 150 | 21.3% | 53.3% |
| A90 | Dutch defence | 120 | 19.2% | 57.1% |
| A91 | Dutch defence | 24 | 33.3% | 58.3% |
| A92 | Dutch defence | 2 | 0.0% | 50.0% |
| A81 | Dutch defence, Blackburne variation | 1 | 0.0% | 0.0% |
| A90 | Dutch defence, Dutch-Indian (Nimzo-Dutch) variation | 7 | 14.3% | 78.6% |
| A84 | Dutch defence, Rubinstein variation | 47 | 34.0% | 55.3% |
| A85 | Dutch with c4 & Nc3 | 21 | 19.0% | 61.9% |
| A86 | Dutch with c4 & g3 | 13 | 15.4% | 69.2% |
| A80 | Dutch, 2.Bg5 variation | 47 | 21.3% | 44.7% |
| A82 | Dutch, Balogh defence | 1 | 0.0% | 100.0% |
| A97 | Dutch, Ilyin-Genevsky variation | 7 | 28.6% | 71.4% |
| A98 | Dutch, Ilyin-Genevsky variation with Qc2 | 2 | 0.0% | 0.0% |
| A99 | Dutch, Ilyin-Genevsky variation with b3 | 10 | 0.0% | 60.0% |
| A97 | Dutch, Ilyin-Genevsky, Winter variation | 4 | 0.0% | 75.0% |
| A86 | Dutch, Leningrad variation | 4 | 25.0% | 87.5% |
| A81 | Dutch, Leningrad, Karlsbad variation | 1 | 100.0% | 50.0% |
| A87 | Dutch, Leningrad, main variation | 30 | 16.7% | 41.7% |
| A89 | Dutch, Leningrad, main variation with Nc6 | 14 | 28.6% | 42.9% |
| A88 | Dutch, Leningrad, main variation with c6 | 46 | 23.9% | 42.4% |
| A80 | Dutch, Manhattan (Alapin, Ulvestad) variation | 2 | 0.0% | 50.0% |
| A80 | Dutch, Spielmann gambit | 3 | 33.3% | 16.7% |
| A82 | Dutch, Staunton gambit | 14 | 28.6% | 35.7% |
| A83 | Dutch, Staunton gambit, Chigorin variation | 7 | 28.6% | 71.4% |
| A83 | Dutch, Staunton gambit, Staunton's line | 19 | 15.8% | 39.5% |
| A82 | Dutch, Staunton gambit, Tartakower variation | 1 | 100.0% | 50.0% |
| A96 | Dutch, classical variation | 24 | 16.7% | 54.2% |
| A92 | Dutch, stonewall variation | 10 | 0.0% | 80.0% |
| A94 | Dutch, stonewall with Ba3 | 5 | 60.0% | 30.0% |
| A92 | Dutch, stonewall with Nc3 | 8 | 12.5% | 43.8% |
| A95 | Dutch, stonewall with Nc3 | 2 | 100.0% | 50.0% |
| A93 | Dutch, stonewall, Botwinnik variation | 24 | 16.7% | 70.8% |
| A90 | Dutch-Indian, Alekhine variation | 5 | 60.0% | 70.0% |
| E10 | Dzindzikhashvili defence | 24 | 16.7% | 45.8% |
| A10 | English opening | 414 | 19.3% | 55.6% |
| A13 | English opening | 243 | 22.6% | 49.2% |
| A15 | English opening | 529 | 22.7% | 53.9% |
| A16 | English opening | 18 | 27.8% | 47.2% |
| A17 | English opening | 20 | 25.0% | 67.5% |
| A20 | English opening | 1445 | 25.3% | 50.4% |
| A21 | English opening | 208 | 27.4% | 53.6% |
| A22 | English opening | 114 | 26.3% | 48.2% |
| A13 | English opening, Agincourt variation | 140 | 20.0% | 42.9% |
| A15 | English, 1...Nf6 (Anglo-Indian defense) | 51 | 23.5% | 58.8% |
| A10 | English, Adorjan defence | 17 | 35.3% | 47.1% |
| A10 | English, Anglo-Dutch defense | 84 | 15.5% | 60.1% |
| A16 | English, Anglo-Gruenfeld defense | 5 | 40.0% | 40.0% |
| A16 | English, Anglo-Gruenfeld, Smyslov defense | 1 | 100.0% | 50.0% |
| A12 | English, Bled variation | 3 | 33.3% | 50.0% |
| A26 | English, Botvinnik system | 71 | 21.1% | 47.2% |
| A28 | English, Bradley Beach variation | 11 | 27.3% | 40.9% |
| A24 | English, Bremen system with ...g6 | 6 | 16.7% | 58.3% |
| A23 | English, Bremen system, Keres variation | 67 | 26.9% | 49.3% |
| A22 | English, Bremen, Smyslov system | 484 | 28.3% | 47.6% |
| A22 | English, Bremen, reverse dragon | 222 | 30.6% | 50.9% |
| A12 | English, Capablanca's variation | 6 | 0.0% | 33.3% |
| A22 | English, Carls' Bremen system | 69 | 24.6% | 38.4% |
| A11 | English, Caro-Kann defensive system | 55 | 29.1% | 54.5% |
| A12 | English, Caro-Kann defensive system | 16 | 18.8% | 53.1% |
| A12 | English, Caro-Kann defensive system, Bogolyubov variation | 1 | 0.0% | 0.0% |
| A21 | English, Keres variation | 6 | 66.7% | 50.0% |
| A21 | English, Kramnik-Shirov counterattack | 83 | 28.9% | 48.2% |
| A13 | English, Kurajica defence | 13 | 15.4% | 53.8% |
| A12 | English, London defensive system | 6 | 16.7% | 25.0% |
| A18 | English, Mikenas-Carls, Flohr variation | 5 | 20.0% | 70.0% |
| A18 | English, Mikenas-Carls, Kevitz variation | 9 | 0.0% | 55.6% |
| A19 | English, Mikenas-Carls, Sicilian variation | 27 | 11.1% | 42.6% |
| A28 | English, Nenarokov variation | 4 | 0.0% | 75.0% |
| A13 | English, Neo-Catalan | 67 | 20.9% | 58.2% |
| A13 | English, Neo-Catalan accepted | 36 | 22.2% | 66.7% |
| A14 | English, Neo-Catalan declined | 5 | 20.0% | 30.0% |
| A12 | English, New York (London) defensive system | 5 | 0.0% | 40.0% |
| A17 | English, Nimzo-English opening | 10 | 10.0% | 55.0% |
| A20 | English, Nimzovich variation | 10 | 0.0% | 60.0% |
| A20 | English, Nimzovich, Flohr variation | 51 | 13.7% | 48.0% |
| A17 | English, Queens Indian formation | 2 | 0.0% | 50.0% |
| A17 | English, Queens Indian, Romanishin variation | 3 | 66.7% | 66.7% |
| A13 | English, Romanishin gambit | 5 | 20.0% | 90.0% |
| A25 | English, Sicilian reversed | 126 | 22.2% | 53.2% |
| A21 | English, Smyslov defence | 2 | 0.0% | 100.0% |
| A14 | English, Symmetrical, Keres defence | 201 | 32.3% | 57.5% |
| A12 | English, Torre defensive system | 3 | 33.3% | 50.0% |
| A21 | English, Troeger defence | 17 | 47.1% | 64.7% |
| A13 | English, Wimpey system | 52 | 21.2% | 51.0% |
| A25 | English, closed system | 279 | 26.2% | 53.9% |
| A26 | English, closed system | 33 | 15.2% | 43.9% |
| A25 | English, closed system (without ...d6) | 18 | 33.3% | 44.4% |
| A25 | English, closed, 5.Rb1 | 67 | 23.9% | 49.3% |
| A25 | English, closed, 5.Rb1 Taimanov variation | 1 | 0.0% | 0.0% |
| A25 | English, closed, Hort variation | 7 | 42.9% | 50.0% |
| A25 | English, closed, Taimanov variation | 1 | 100.0% | 50.0% |
| A28 | English, four knights system | 65 | 23.1% | 65.4% |
| A28 | English, four knights, 4.e3 | 136 | 22.8% | 50.4% |
| A28 | English, four knights, Capablanca variation | 56 | 14.3% | 60.7% |
| A28 | English, four knights, Marini variation | 158 | 29.7% | 53.5% |
| A28 | English, four knights, Nimzovich variation | 67 | 29.9% | 61.2% |
| A28 | English, four knights, Romanishin variation | 79 | 29.1% | 50.0% |
| A28 | English, four knights, Stean variation | 10 | 20.0% | 60.0% |
| A29 | English, four knights, kingside fianchetto | 2508 | 29.1% | 49.8% |
| A30 | English, symmetrical variation | 1197 | 26.4% | 51.9% |
| A32 | English, symmetrical variation | 18 | 22.2% | 50.0% |
| A33 | English, symmetrical variation | 201 | 30.3% | 55.0% |
| A34 | English, symmetrical variation | 218 | 18.8% | 47.5% |
| A35 | English, symmetrical variation | 41 | 26.8% | 59.8% |
| A36 | English, symmetrical variation | 27 | 22.2% | 44.4% |
| A37 | English, symmetrical variation | 51 | 19.6% | 62.7% |
| A38 | English, symmetrical variation | 136 | 30.1% | 52.6% |
| A31 | English, symmetrical, Benoni formation | 339 | 20.6% | 51.9% |
| A36 | English, symmetrical, Botvinnik system | 5 | 40.0% | 60.0% |
| A36 | English, symmetrical, Botvinnik system reversed | 12 | 41.7% | 37.5% |
| A37 | English, symmetrical, Botvinnik system reversed | 81 | 21.0% | 51.2% |
| A33 | English, symmetrical, Geller variation | 346 | 21.4% | 54.3% |
| A34 | English, symmetrical, Rubinstein system | 5 | 60.0% | 70.0% |
| A35 | English, symmetrical, four knights system | 549 | 28.2% | 53.5% |
| A30 | English, symmetrical, hedgehog system | 1132 | 27.3% | 56.1% |
| A38 | English, symmetrical, main line with b3 | 1 | 0.0% | 0.0% |
| A38 | English, symmetrical, main line with d3 | 10 | 30.0% | 45.0% |
| A39 | English, symmetrical, main line with d4 | 73 | 21.9% | 54.8% |
| A34 | English, symmetrical, three knights system | 225 | 24.4% | 54.4% |
| A27 | English, three knights system | 28 | 35.7% | 46.4% |
| A36 | English, ultra-symmetrical variation | 61 | 27.9% | 51.6% |
| C52 | Evans gambit | 7 | 28.6% | 42.9% |
| C51 | Evans gambit declined | 1 | 0.0% | 0.0% |
| C51 | Evans gambit declined, 5.a4 | 8 | 0.0% | 50.0% |
| C51 | Evans gambit declined, Cordel variation | 3 | 66.7% | 33.3% |
| C52 | Evans gambit, Alapin-Steinitz variation | 2 | 50.0% | 75.0% |
| C51 | Evans gambit, Cordel variation | 11 | 18.2% | 45.5% |
| C52 | Evans gambit, Lasker defence | 2 | 0.0% | 50.0% |
| C51 | Evans gambit, Steinitz variation | 1 | 0.0% | 0.0% |
| C52 | Evans gambit, Tartakower attack | 5 | 0.0% | 60.0% |
| C52 | Evans gambit, compromised defence | 2 | 50.0% | 25.0% |
| C51 | Evans gambit, normal variation | 7 | 14.3% | 50.0% |
| C49 | Four knights | 12 | 16.7% | 58.3% |
| C46 | Four knights game | 167 | 22.8% | 54.5% |
| C48 | Four knights, Bardeleben variation | 3 | 0.0% | 66.7% |
| C47 | Four knights, Belgrade gambit | 27 | 11.1% | 46.3% |
| C46 | Four knights, Gunsberg variation | 17 | 23.5% | 58.8% |
| C46 | Four knights, Italian variation | 108 | 25.9% | 50.0% |
| C49 | Four knights, Janowski variation | 4 | 25.0% | 37.5% |
| C48 | Four knights, Marshall variation | 3 | 33.3% | 50.0% |
| C49 | Four knights, Nimzovich (Paulsen) variation | 9 | 44.4% | 55.6% |
| C48 | Four knights, Ranken variation | 9 | 44.4% | 33.3% |
| C48 | Four knights, Rubinstein counter-gambit | 268 | 19.4% | 57.5% |
| C48 | Four knights, Rubinstein counter-gambit, 5.Be2 | 5 | 20.0% | 50.0% |
| C48 | Four knights, Rubinstein counter-gambit, Bogolyubov variation | 1 | 0.0% | 0.0% |
| C48 | Four knights, Rubinstein counter-gambit, Henneberger variation | 15 | 40.0% | 60.0% |
| C48 | Four knights, Rubinstein counter-gambit, exchange variation | 36 | 22.2% | 47.2% |
| C46 | Four knights, Schultze-Mueller gambit | 9 | 44.4% | 44.4% |
| C47 | Four knights, Scotch variation | 26 | 30.8% | 57.7% |
| C47 | Four knights, Scotch, 4...exd4 | 171 | 29.8% | 50.0% |
| C47 | Four knights, Scotch, Krause variation | 18 | 22.2% | 72.2% |
| C48 | Four knights, Spanish variation | 62 | 17.7% | 50.8% |
| C48 | Four knights, Spanish, classical defence | 32 | 28.1% | 42.2% |
| C48 | Four knights, Spielmann variation | 1 | 100.0% | 50.0% |
| C49 | Four knights, Svenonius variation | 1 | 0.0% | 100.0% |
| C49 | Four knights, double Ruy Lopez | 130 | 36.2% | 59.6% |
| C49 | Four knights, symmetrical variation | 43 | 37.2% | 55.8% |
| C49 | Four knights, symmetrical, Maroczy system | 6 | 33.3% | 50.0% |
| C49 | Four knights, symmetrical, Metger unpin | 103 | 26.2% | 47.1% |
| C49 | Four knights, symmetrical, Pillsbury variation | 9 | 22.2% | 44.4% |
| C49 | Four knights, symmetrical, Tarrasch variation | 3 | 66.7% | 66.7% |
| C00 | French defence | 527 | 20.9% | 56.5% |
| C11 | French defence | 105 | 18.1% | 39.5% |
| C00 | French defence, Steiner variation | 158 | 23.4% | 53.5% |
| C13 | French, Albin-Alekhine-Chatard attack | 12 | 16.7% | 66.7% |
| C13 | French, Albin-Alekhine-Chatard attack, Breyer variation | 7 | 42.9% | 64.3% |
| C13 | French, Albin-Alekhine-Chatard attack, Maroczy variation | 4 | 75.0% | 37.5% |
| C13 | French, Albin-Alekhine-Chatard attack, Spielmann variation | 10 | 50.0% | 65.0% |
| C13 | French, Albin-Alekhine-Chatard attack, Teichmann variation | 1 | 0.0% | 100.0% |
| C11 | French, Burn variation | 2237 | 27.3% | 52.5% |
| C00 | French, Chigorin variation | 81 | 22.2% | 53.1% |
| C10 | French, Fort Knox variation | 109 | 21.1% | 51.8% |
| C10 | French, Frere (Becker) variation | 12 | 16.7% | 58.3% |
| C00 | French, King's Indian attack | 180 | 18.9% | 50.6% |
| C00 | French, Labourdonnais variation | 47 | 14.9% | 54.3% |
| C12 | French, MacCutcheon variation | 24 | 25.0% | 58.3% |
| C12 | French, MacCutcheon, Bernstein variation | 1 | 0.0% | 100.0% |
| C12 | French, MacCutcheon, Chigorin variation | 1 | 100.0% | 50.0% |
| C12 | French, MacCutcheon, Dr. Olland (Dutch) variation | 6 | 16.7% | 41.7% |
| C12 | French, MacCutcheon, Janowski variation | 21 | 19.0% | 76.2% |
| C12 | French, MacCutcheon, Lasker variation | 36 | 5.6% | 58.3% |
| C12 | French, MacCutcheon, Lasker variation, 8...g6 | 224 | 18.8% | 49.6% |
| C10 | French, Paulsen variation | 207 | 27.5% | 56.8% |
| C00 | French, Pelikan variation | 16 | 25.0% | 31.3% |
| C00 | French, Reti (Spielmann) variation | 52 | 17.3% | 54.8% |
| C00 | French, Reversed Philidor formation | 6 | 0.0% | 33.3% |
| C10 | French, Rubinstein variation | 503 | 25.0% | 49.1% |
| C10 | French, Rubinstein, Capablanca line | 1 | 0.0% | 100.0% |
| C00 | French, Schlechter variation | 91 | 27.5% | 50.0% |
| C11 | French, Steinitz variation | 247 | 19.0% | 48.4% |
| C11 | French, Steinitz, Boleslavsky variation | 755 | 25.8% | 54.0% |
| C11 | French, Swiss variation | 32 | 18.8% | 43.8% |
| C03 | French, Tarrasch | 371 | 22.9% | 53.8% |
| C05 | French, Tarrasch, Botvinnik variation | 7 | 14.3% | 78.6% |
| C07 | French, Tarrasch, Eliskases variation | 1 | 0.0% | 0.0% |
| C04 | French, Tarrasch, Guimard main line | 51 | 17.6% | 57.8% |
| C03 | French, Tarrasch, Guimard variation | 50 | 20.0% | 60.0% |
| C06 | French, Tarrasch, Leningrad variation | 2 | 0.0% | 100.0% |
| C05 | French, Tarrasch, closed variation | 258 | 20.9% | 55.8% |
| C06 | French, Tarrasch, closed variation, main line | 733 | 26.7% | 51.0% |
| C07 | French, Tarrasch, open variation | 951 | 28.7% | 52.7% |
| C09 | French, Tarrasch, open variation, main line | 621 | 32.2% | 56.0% |
| C08 | French, Tarrasch, open, 4.ed ed | 515 | 30.5% | 50.8% |
| C00 | French, Two knights variation | 36 | 13.9% | 54.2% |
| C15 | French, Winawer (Nimzovich) variation | 172 | 32.6% | 59.3% |
| C15 | French, Winawer, Alekhine (Maroczy) gambit | 56 | 16.1% | 59.8% |
| C15 | French, Winawer, Alekhine gambit | 1 | 0.0% | 100.0% |
| C15 | French, Winawer, Alekhine gambit, Kan variation | 25 | 12.0% | 42.0% |
| C16 | French, Winawer, Petrosian variation | 20 | 10.0% | 35.0% |
| C16 | French, Winawer, advance variation | 167 | 25.1% | 59.3% |
| C17 | French, Winawer, advance variation | 27 | 18.5% | 50.0% |
| C18 | French, Winawer, advance variation | 7 | 14.3% | 35.7% |
| C17 | French, Winawer, advance, 5.a3 | 150 | 22.7% | 53.3% |
| C19 | French, Winawer, advance, 6...Ne7 | 46 | 26.1% | 50.0% |
| C17 | French, Winawer, advance, Bogolyubov variation | 42 | 28.6% | 52.4% |
| C17 | French, Winawer, advance, Rauzer variation | 2 | 50.0% | 25.0% |
| C17 | French, Winawer, advance, Russian variation | 12 | 8.3% | 54.2% |
| C19 | French, Winawer, advance, Smyslov variation | 14 | 0.0% | 50.0% |
| C19 | French, Winawer, advance, poisoned pawn variation | 1631 | 22.1% | 60.7% |
| C19 | French, Winawer, advance, poisoned pawn, Konstantinopolsky variation | 305 | 22.0% | 59.5% |
| C19 | French, Winawer, advance, positional main line | 747 | 23.8% | 55.3% |
| C18 | French, Winawer, classical variation | 121 | 21.5% | 54.5% |
| C00 | French, Wing gambit | 1 | 0.0% | 0.0% |
| C02 | French, advance variation | 371 | 19.9% | 55.5% |
| C02 | French, advance, Euwe variation | 195 | 16.9% | 50.5% |
| C02 | French, advance, Milner-Barry gambit | 16 | 25.0% | 62.5% |
| C02 | French, advance, Nimzovich system | 76 | 10.5% | 46.1% |
| C02 | French, advance, Nimzovich variation | 2 | 0.0% | 0.0% |
| C02 | French, advance, Paulsen attack | 254 | 17.7% | 53.3% |
| C02 | French, advance, Steinitz variation | 85 | 32.9% | 49.4% |
| C02 | French, advance, Wade variation | 33 | 33.3% | 53.0% |
| C13 | French, classical | 2 | 0.0% | 50.0% |
| C14 | French, classical variation | 10 | 20.0% | 30.0% |
| C14 | French, classical, Alapin variation | 2 | 0.0% | 50.0% |
| C13 | French, classical, Anderssen variation | 6 | 0.0% | 33.3% |
| C13 | French, classical, Anderssen-Richter variation | 2 | 0.0% | 50.0% |
| C13 | French, classical, Frankfurt variation | 3 | 33.3% | 83.3% |
| C14 | French, classical, Pollock variation | 3 | 0.0% | 33.3% |
| C14 | French, classical, Rubinstein variation | 3 | 0.0% | 100.0% |
| C14 | French, classical, Stahlberg variation | 1 | 0.0% | 0.0% |
| C14 | French, classical, Steinitz variation | 200 | 22.5% | 55.8% |
| C14 | French, classical, Tarrasch variation | 2 | 0.0% | 100.0% |
| C13 | French, classical, Vistaneckis (Nimzovich) variation | 1 | 0.0% | 100.0% |
| C01 | French, exchange variation | 429 | 24.0% | 54.7% |
| C01 | French, exchange, Svenonius variation | 14 | 35.7% | 75.0% |
| C50 | Giuoco Pianissimo | 223 | 24.2% | 49.8% |
| C50 | Giuoco Pianissimo, Canal variation | 41 | 19.5% | 41.5% |
| C50 | Giuoco Pianissimo, Italian four knights variation | 130 | 25.4% | 55.8% |
| C50 | Giuoco Piano | 27 | 33.3% | 72.2% |
| C53 | Giuoco Piano | 263 | 21.3% | 52.9% |
| C54 | Giuoco Piano | 14 | 14.3% | 42.9% |
| C53 | Giuoco Piano, Anderssen variation | 2 | 50.0% | 75.0% |
| C53 | Giuoco Piano, Bird's attack | 21 | 23.8% | 40.5% |
| C53 | Giuoco Piano, LaBourdonnais variation | 7 | 42.9% | 50.0% |
| C53 | Giuoco Piano, Mestel variation | 1 | 0.0% | 100.0% |
| C53 | Giuoco Piano, close variation | 4 | 0.0% | 50.0% |
| C50 | Giuoco Piano, four knights variation | 55 | 25.5% | 56.4% |
| D80 | Gruenfeld defence | 15 | 46.7% | 56.7% |
| D99 | Gruenfeld defence, Smyslov, Yugoslav variation | 1 | 0.0% | 100.0% |
| D99 | Gruenfeld defence, Smyslov, main line | 16 | 31.3% | 53.1% |
| D93 | Gruenfeld with Bf4 e3 | 46 | 26.1% | 54.3% |
| D82 | Gruenfeld, 4.Bf4 | 13 | 30.8% | 61.5% |
| D92 | Gruenfeld, 5.Bf4 | 108 | 24.1% | 54.6% |
| D91 | Gruenfeld, 5.Bg5 | 172 | 23.3% | 54.1% |
| D94 | Gruenfeld, 5.e3 | 70 | 25.7% | 54.3% |
| D95 | Gruenfeld, Botvinnik variation | 4 | 25.0% | 62.5% |
| D90 | Gruenfeld, Flohr variation | 14 | 21.4% | 60.7% |
| D83 | Gruenfeld, Gruenfeld gambit | 1 | 0.0% | 100.0% |
| D94 | Gruenfeld, Makogonov variation | 8 | 25.0% | 37.5% |
| D94 | Gruenfeld, Opovcensky variation | 8 | 12.5% | 43.8% |
| D81 | Gruenfeld, Russian variation | 4 | 50.0% | 50.0% |
| D96 | Gruenfeld, Russian variation | 30 | 23.3% | 55.0% |
| D97 | Gruenfeld, Russian variation with e4 | 10 | 60.0% | 60.0% |
| D97 | Gruenfeld, Russian, Alekhine (Hungarian) variation | 677 | 24.4% | 59.9% |
| D97 | Gruenfeld, Russian, Byrne (Simagin) variation | 24 | 8.3% | 33.3% |
| D98 | Gruenfeld, Russian, Keres variation | 3 | 0.0% | 66.7% |
| D97 | Gruenfeld, Russian, Prins variation | 90 | 28.9% | 54.4% |
| D98 | Gruenfeld, Russian, Smyslov variation | 37 | 21.6% | 54.1% |
| D97 | Gruenfeld, Russian, Szabo (Boleslavsky) variation | 11 | 9.1% | 59.1% |
| D90 | Gruenfeld, Schlechter variation | 2 | 0.0% | 100.0% |
| D94 | Gruenfeld, Smyslov defence | 13 | 23.1% | 42.3% |
| D88 | Gruenfeld, Spassky variation, main line, 10...cd, 11.cd | 15 | 46.7% | 56.7% |
| D80 | Gruenfeld, Stockholm variation | 34 | 23.5% | 41.2% |
| D90 | Gruenfeld, Three knights variation | 67 | 25.4% | 53.0% |
| D85 | Gruenfeld, exchange variation | 98 | 25.5% | 42.3% |
| D86 | Gruenfeld, exchange, Simagin's improved variation | 1 | 100.0% | 50.0% |
| D86 | Gruenfeld, exchange, Simagin's lesser variation | 1 | 0.0% | 100.0% |
| D87 | Gruenfeld, exchange, Spassky variation | 34 | 47.1% | 58.8% |
| D86 | Gruenfeld, exchange, classical variation | 79 | 21.5% | 48.7% |
| D85 | Gruenfeld, modern exchange variation | 598 | 30.8% | 48.5% |
| C21 | Halasz gambit | 2 | 50.0% | 75.0% |
| C50 | Hungarian defence | 14 | 50.0% | 46.4% |
| C44 | Inverted Hanham | 6 | 33.3% | 16.7% |
| C44 | Inverted Hungarian | 7 | 28.6% | 28.6% |
| C36 | KGA, Abbazia defence (classical defence, modern defence[!]) | 3 | 0.0% | 66.7% |
| C36 | KGA, Abbazia defence, modern variation | 27 | 18.5% | 38.9% |
| C34 | KGA, Becker defence | 8 | 0.0% | 25.0% |
| C37 | KGA, Blachly gambit | 5 | 20.0% | 70.0% |
| C34 | KGA, Bonsch-Osmolovsky variation | 3 | 0.0% | 66.7% |
| C33 | KGA, Breyer gambit | 5 | 20.0% | 10.0% |
| C33 | KGA, Carrera (Basman) gambit | 8 | 37.5% | 18.8% |
| C35 | KGA, Cunningham defence | 6 | 0.0% | 16.7% |
| C35 | KGA, Cunningham, Euwe defence | 4 | 0.0% | 25.0% |
| C34 | KGA, Fischer defence | 28 | 10.7% | 33.9% |
| C38 | KGA, Hanstein gambit | 2 | 0.0% | 0.0% |
| C33 | KGA, Keres (Mason-Steinitz) gambit | 1 | 0.0% | 100.0% |
| C39 | KGA, Kieseritsky, Berlin defence | 1 | 0.0% | 0.0% |
| C39 | KGA, Kieseritsky, Berlin defence, 6.Bc4 | 14 | 14.3% | 50.0% |
| C39 | KGA, Kieseritsky, Kolisch defence | 3 | 33.3% | 83.3% |
| C39 | KGA, Kieseritsky, Paulsen defence | 1 | 100.0% | 50.0% |
| C39 | KGA, Kieseritsky, Rice gambit | 2 | 100.0% | 50.0% |
| C39 | KGA, Kieseritsky, Salvio (Rosenthal) defence | 2 | 50.0% | 75.0% |
| C33 | KGA, Lesser bishop's (Petroff-Jaenisch-Tartakower) gambit | 5 | 20.0% | 70.0% |
| C37 | KGA, MacDonnell gambit | 1 | 100.0% | 50.0% |
| C37 | KGA, Muzio gambit | 2 | 0.0% | 0.0% |
| C37 | KGA, Muzio gambit, From defence | 2 | 50.0% | 25.0% |
| C37 | KGA, Quaade gambit | 5 | 0.0% | 0.0% |
| C37 | KGA, Rosentreter gambit | 1 | 0.0% | 100.0% |
| C37 | KGA, Salvio gambit | 2 | 50.0% | 25.0% |
| C34 | KGA, Schallop defence | 10 | 20.0% | 50.0% |
| C37 | KGA, Silberschmidt gambit | 1 | 0.0% | 0.0% |
| C33 | KGA, Villemson (Steinitz) gambit | 4 | 25.0% | 12.5% |
| C33 | KGA, bishop's gambit | 6 | 0.0% | 33.3% |
| C33 | KGA, bishop's gambit, Bledow variation | 7 | 28.6% | 28.6% |
| C33 | KGA, bishop's gambit, Boden defence | 2 | 50.0% | 75.0% |
| C33 | KGA, bishop's gambit, Bogolyubov variation | 9 | 11.1% | 61.1% |
| C33 | KGA, bishop's gambit, Boren-Svenonius variation | 1 | 0.0% | 0.0% |
| C33 | KGA, bishop's gambit, Cozio (Morphy) defence | 1 | 100.0% | 50.0% |
| C33 | KGA, bishop's gambit, Jaenisch variation | 13 | 15.4% | 46.2% |
| C33 | KGA, bishop's gambit, Lopez-Gianutio counter-gambit | 2 | 0.0% | 0.0% |
| C33 | KGA, bishop's gambit, Maurian defence | 1 | 0.0% | 100.0% |
| C33 | KGA, bishop's gambit, Paulsen attack | 4 | 25.0% | 37.5% |
| C33 | KGA, bishop's gambit, Steinitz defence | 2 | 100.0% | 50.0% |
| C33 | KGA, bishop's gambit, classical defence | 2 | 50.0% | 25.0% |
| C30 | KGD, 2...Nf6 | 1 | 0.0% | 0.0% |
| C31 | KGD, Falkbeer counter-gambit | 6 | 16.7% | 41.7% |
| C31 | KGD, Falkbeer, 3...e4 | 1 | 100.0% | 50.0% |
| C31 | KGD, Falkbeer, 4.d3 | 1 | 100.0% | 50.0% |
| C31 | KGD, Falkbeer, Morphy gambit | 1 | 0.0% | 0.0% |
| C31 | KGD, Falkbeer, Nimzovich variation | 1 | 0.0% | 100.0% |
| C32 | KGD, Falkbeer, main line, 7...Bf5 | 2 | 50.0% | 25.0% |
| C30 | KGD, Keene's defence | 1 | 0.0% | 100.0% |
| C30 | KGD, Mafia defence | 17 | 11.8% | 76.5% |
| C31 | KGD, Nimzovich counter-gambit | 5 | 0.0% | 60.0% |
| C30 | KGD, classical variation | 29 | 20.7% | 55.2% |
| C30 | KGD, classical, 4.c3 | 3 | 0.0% | 66.7% |
| C30 | KGD, classical, Soldatenkov variation | 3 | 0.0% | 66.7% |
| C20 | KP, Indian opening | 12 | 16.7% | 25.0% |
| B00 | KP, Nimzovich defence | 104 | 24.0% | 57.2% |
| B00 | KP, Nimzovich defence, Bogolyubov variation | 34 | 26.5% | 48.5% |
| B00 | KP, Nimzovich defence, Marshall gambit | 2 | 0.0% | 50.0% |
| A50 | Kevitz-Trajkovich defence | 374 | 28.6% | 50.1% |
| E60 | King's Indian defence | 44 | 18.2% | 50.0% |
| E61 | King's Indian defence, 3.Nc3 | 96 | 15.6% | 52.6% |
| E72 | King's Indian with e4 & g3 | 5 | 0.0% | 20.0% |
| E60 | King's Indian, 3.Nf3 | 608 | 22.7% | 55.6% |
| E60 | King's Indian, 3.g3 | 148 | 23.6% | 51.7% |
| E60 | King's Indian, 3.g3, counterthrust variation | 1 | 0.0% | 0.0% |
| E70 | King's Indian, 4.e4 | 15 | 40.0% | 46.7% |
| E73 | King's Indian, 5.Be2 | 6 | 16.7% | 58.3% |
| E90 | King's Indian, 5.Nf3 | 77 | 18.2% | 51.9% |
| E91 | King's Indian, 6.Be2 | 101 | 21.8% | 58.4% |
| E92 | King's Indian, Andersson variation | 22 | 18.2% | 40.9% |
| E60 | King's Indian, Anti-Gruenfeld | 11 | 27.3% | 68.2% |
| E73 | King's Indian, Averbakh system | 15 | 26.7% | 40.0% |
| E74 | King's Indian, Averbakh, 6...c5 | 3 | 0.0% | 33.3% |
| E60 | King's Indian, Danube gambit | 1 | 0.0% | 100.0% |
| A48 | King's Indian, East Indian defence | 139 | 27.3% | 54.0% |
| E76 | King's Indian, Four pawns attack | 13 | 23.1% | 57.7% |
| E77 | King's Indian, Four pawns attack | 4 | 25.0% | 62.5% |
| E76 | King's Indian, Four pawns attack, dynamic line | 7 | 28.6% | 57.1% |
| E92 | King's Indian, Gligoric-Taimanov system | 83 | 26.5% | 59.0% |
| E91 | King's Indian, Kazakh variation | 37 | 21.6% | 64.9% |
| E70 | King's Indian, Kramer system | 6 | 16.7% | 58.3% |
| E90 | King's Indian, Larsen variation | 12 | 16.7% | 50.0% |
| A48 | King's Indian, London system | 141 | 24.8% | 55.0% |
| E71 | King's Indian, Makagonov system (5.h3) | 19 | 26.3% | 39.5% |
| E92 | King's Indian, Petrosian system | 8 | 12.5% | 43.8% |
| E92 | King's Indian, Petrosian system, Stein variation | 110 | 24.5% | 50.5% |
| E93 | King's Indian, Petrosian system, main line | 4 | 25.0% | 62.5% |
| E80 | King's Indian, Saemisch variation | 11 | 9.1% | 50.0% |
| E81 | King's Indian, Saemisch, 5...O-O | 79 | 21.5% | 51.3% |
| E83 | King's Indian, Saemisch, 6...Nc6 | 10 | 0.0% | 50.0% |
| E81 | King's Indian, Saemisch, Byrne variation | 3 | 0.0% | 33.3% |
| E83 | King's Indian, Saemisch, Panno formation | 7 | 0.0% | 42.9% |
| E84 | King's Indian, Saemisch, Panno main line | 8 | 50.0% | 50.0% |
| E82 | King's Indian, Saemisch, double fianchetto variation | 1 | 0.0% | 100.0% |
| E89 | King's Indian, Saemisch, orthodox main line | 3 | 33.3% | 83.3% |
| E85 | King's Indian, Saemisch, orthodox variation | 3 | 33.3% | 50.0% |
| E86 | King's Indian, Saemisch, orthodox, 7.Nge2 c6 | 12 | 16.7% | 66.7% |
| E87 | King's Indian, Saemisch, orthodox, 7.d5 | 80 | 22.5% | 62.5% |
| E88 | King's Indian, Saemisch, orthodox, 7.d5 c6 | 7 | 42.9% | 64.3% |
| E87 | King's Indian, Saemisch, orthodox, Bronstein variation | 1 | 0.0% | 100.0% |
| E61 | King's Indian, Smyslov system | 8 | 37.5% | 43.8% |
| A48 | King's Indian, Torre attack | 118 | 20.3% | 48.3% |
| E90 | King's Indian, Zinnowitz variation | 28 | 28.6% | 53.6% |
| E70 | King's Indian, accelerated Averbakh system | 8 | 37.5% | 43.8% |
| E92 | King's Indian, classical variation | 1 | 0.0% | 0.0% |
| E62 | King's Indian, fianchetto variation | 31 | 32.3% | 48.4% |
| E62 | King's Indian, fianchetto with ...Nc6 | 22 | 22.7% | 43.2% |
| E67 | King's Indian, fianchetto with ...Nd7 | 36 | 33.3% | 50.0% |
| A49 | King's Indian, fianchetto without c4 | 142 | 26.8% | 50.0% |
| E62 | King's Indian, fianchetto, Kavalek (Bronstein) variation | 81 | 25.9% | 52.5% |
| E62 | King's Indian, fianchetto, Larsen system | 28 | 21.4% | 71.4% |
| E63 | King's Indian, fianchetto, Panno variation | 375 | 21.9% | 53.9% |
| E62 | King's Indian, fianchetto, Simagin variation | 9 | 22.2% | 88.9% |
| E62 | King's Indian, fianchetto, Uhlmann (Szabo) variation | 17 | 17.6% | 61.8% |
| E66 | King's Indian, fianchetto, Yugoslav Panno | 105 | 21.0% | 55.2% |
| E64 | King's Indian, fianchetto, Yugoslav system | 40 | 15.0% | 60.0% |
| E65 | King's Indian, fianchetto, Yugoslav, 7.O-O | 34 | 26.5% | 42.6% |
| E69 | King's Indian, fianchetto, classical main line | 20 | 40.0% | 40.0% |
| E67 | King's Indian, fianchetto, classical variation | 75 | 24.0% | 54.7% |
| E68 | King's Indian, fianchetto, classical variation, 8.e4 | 331 | 24.5% | 53.6% |
| E62 | King's Indian, fianchetto, lesser Simagin (Spassky) variation | 37 | 16.2% | 56.8% |
| E94 | King's Indian, orthodox variation | 105 | 26.7% | 61.9% |
| E94 | King's Indian, orthodox, 7...Nbd7 | 98 | 31.6% | 49.5% |
| E95 | King's Indian, orthodox, 7...Nbd7, 8.Re1 | 34 | 23.5% | 44.1% |
| E97 | King's Indian, orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation) | 876 | 20.7% | 57.4% |
| E98 | King's Indian, orthodox, Aronin-Taimanov, 9.Ne1 | 22 | 27.3% | 68.2% |
| E99 | King's Indian, orthodox, Aronin-Taimanov, Benko attack | 1 | 100.0% | 50.0% |
| E97 | King's Indian, orthodox, Aronin-Taimanov, bayonet attack | 3 | 0.0% | 33.3% |
| E94 | King's Indian, orthodox, Donner variation | 17 | 17.6% | 50.0% |
| C30 | King's gambit | 20 | 15.0% | 62.5% |
| C33 | King's gambit accepted | 2 | 0.0% | 100.0% |
| C34 | King's knight's gambit | 5 | 0.0% | 20.0% |
| C38 | King's knight's gambit | 2 | 0.0% | 50.0% |
| C20 | King's pawn game | 46 | 19.6% | 62.0% |
| C50 | King's pawn game | 69 | 17.4% | 58.0% |
| B00 | King's pawn opening | 139 | 20.1% | 52.5% |
| A00 | Lasker simul special | 6 | 16.7% | 58.3% |
| C40 | Latvian, Fraser defence | 1 | 0.0% | 100.0% |
| C00 | Lengfellner system | 64 | 20.3% | 60.2% |
| D00 | Levitsky attack (Queen's bishop attack) | 264 | 20.8% | 47.5% |
| A40 | Modern defence | 79 | 17.7% | 57.0% |
| A42 | Modern defence, Averbakh system | 7 | 14.3% | 64.3% |
| A42 | Modern defence, Averbakh system, Randspringer variation | 1 | 100.0% | 50.0% |
| A03 | Mujannah opening | 1 | 0.0% | 0.0% |
| D70 | Neo-Gruenfeld (Kemeri) defence | 7 | 28.6% | 57.1% |
| D70 | Neo-Gruenfeld defence | 13 | 15.4% | 61.5% |
| D73 | Neo-Gruenfeld, 5.Nf3 | 139 | 26.6% | 52.2% |
| D71 | Neo-Gruenfeld, 5.cd | 4 | 75.0% | 37.5% |
| D72 | Neo-Gruenfeld, 5.cd, main line | 3 | 0.0% | 0.0% |
| D77 | Neo-Gruenfeld, 6.O-O | 71 | 32.4% | 51.4% |
| D78 | Neo-Gruenfeld, 6.O-O c6 | 142 | 23.2% | 53.2% |
| D79 | Neo-Gruenfeld, 6.O-O, main line | 77 | 31.2% | 50.6% |
| D74 | Neo-Gruenfeld, 6.cd Nxd5, 7.O-O | 52 | 26.9% | 55.8% |
| D76 | Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb6 | 29 | 31.0% | 67.2% |
| D75 | Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3 | 30 | 43.3% | 48.3% |
| D75 | Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.dc | 5 | 40.0% | 60.0% |
| E00 | Neo-Indian (Seirawan) attack | 53 | 17.0% | 50.0% |
| E20 | Nimzo-Indian defence | 12 | 25.0% | 62.5% |
| E40 | Nimzo-Indian, 4.e3 | 24 | 16.7% | 62.5% |
| E46 | Nimzo-Indian, 4.e3 O-O | 4 | 25.0% | 37.5% |
| E47 | Nimzo-Indian, 4.e3 O-O, 5.Bd3 | 14 | 57.1% | 50.0% |
| E48 | Nimzo-Indian, 4.e3 O-O, 5.Bd3 d5 | 17 | 29.4% | 55.9% |
| E41 | Nimzo-Indian, 4.e3 c5 | 35 | 17.1% | 48.6% |
| E42 | Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) | 98 | 25.5% | 48.5% |
| E51 | Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d5 | 14 | 28.6% | 42.9% |
| E50 | Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d5 | 3 | 0.0% | 66.7% |
| E49 | Nimzo-Indian, 4.e3, Botvinnik system | 25 | 28.0% | 54.0% |
| E45 | Nimzo-Indian, 4.e3, Bronstein (Byrne) variation | 8 | 25.0% | 50.0% |
| E53 | Nimzo-Indian, 4.e3, Gligoric system with 7...Nbd7 | 2 | 50.0% | 75.0% |
| E54 | Nimzo-Indian, 4.e3, Gligoric system with 7...dc | 43 | 27.9% | 51.2% |
| E55 | Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation | 597 | 27.5% | 52.4% |
| E54 | Nimzo-Indian, 4.e3, Gligoric system, Smyslov variation | 4 | 0.0% | 25.0% |
| E53 | Nimzo-Indian, 4.e3, Keres variation | 9 | 22.2% | 44.4% |
| E51 | Nimzo-Indian, 4.e3, Ragozin variation | 16 | 50.0% | 43.8% |
| E40 | Nimzo-Indian, 4.e3, Taimanov variation | 18 | 11.1% | 38.9% |
| E59 | Nimzo-Indian, 4.e3, main line | 17 | 5.9% | 55.9% |
| E52 | Nimzo-Indian, 4.e3, main line with ...b6 | 32 | 21.9% | 48.4% |
| E53 | Nimzo-Indian, 4.e3, main line with ...c5 | 21 | 19.0% | 61.9% |
| E56 | Nimzo-Indian, 4.e3, main line with 7...Nc6 | 15 | 13.3% | 40.0% |
| E58 | Nimzo-Indian, 4.e3, main line with 8...Bxc3 | 71 | 28.2% | 49.3% |
| E43 | Nimzo-Indian, Fischer variation | 22 | 22.7% | 56.8% |
| E44 | Nimzo-Indian, Fischer variation, 5.Ne2 | 15 | 20.0% | 56.7% |
| E20 | Nimzo-Indian, Kmoch variation | 63 | 20.6% | 51.6% |
| E30 | Nimzo-Indian, Leningrad variation | 44 | 13.6% | 45.5% |
| E30 | Nimzo-Indian, Leningrad, ...b5 gambit | 2 | 0.0% | 0.0% |
| E31 | Nimzo-Indian, Leningrad, main line | 7 | 14.3% | 64.3% |
| E46 | Nimzo-Indian, Reshevsky variation | 24 | 29.2% | 68.8% |
| E20 | Nimzo-Indian, Romanishin-Kasparov (Steiner) system | 74 | 18.9% | 43.2% |
| E24 | Nimzo-Indian, Saemisch variation | 12 | 25.0% | 37.5% |
| E25 | Nimzo-Indian, Saemisch variation | 13 | 15.4% | 61.5% |
| E26 | Nimzo-Indian, Saemisch variation | 5 | 20.0% | 50.0% |
| E27 | Nimzo-Indian, Saemisch variation | 4 | 50.0% | 25.0% |
| E28 | Nimzo-Indian, Saemisch variation | 3 | 33.3% | 16.7% |
| E24 | Nimzo-Indian, Saemisch, Botvinnik variation | 1 | 0.0% | 0.0% |
| E25 | Nimzo-Indian, Saemisch, Keres variation | 27 | 14.8% | 40.7% |
| E26 | Nimzo-Indian, Saemisch, O'Kelly variation | 4 | 50.0% | 50.0% |
| E25 | Nimzo-Indian, Saemisch, Romanovsky variation | 6 | 16.7% | 41.7% |
| E29 | Nimzo-Indian, Saemisch, main line | 8 | 25.0% | 37.5% |
| E46 | Nimzo-Indian, Simagin variation | 3 | 0.0% | 33.3% |
| E22 | Nimzo-Indian, Spielmann variation | 11 | 18.2% | 36.4% |
| E23 | Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc6 | 2 | 0.0% | 50.0% |
| E32 | Nimzo-Indian, classical variation | 878 | 27.2% | 51.0% |
| E33 | Nimzo-Indian, classical, 4...Nc6 | 9 | 33.3% | 50.0% |
| E38 | Nimzo-Indian, classical, 4...c5 | 35 | 25.7% | 55.7% |
| E32 | Nimzo-Indian, classical, Adorjan gambit | 8 | 25.0% | 62.5% |
| E36 | Nimzo-Indian, classical, Botvinnik variation | 1 | 0.0% | 0.0% |
| E33 | Nimzo-Indian, classical, Milner-Barry (Zurich) variation | 29 | 13.8% | 65.5% |
| E34 | Nimzo-Indian, classical, Noa variation | 36 | 38.9% | 58.3% |
| E36 | Nimzo-Indian, classical, Noa variation, 5.a3 | 5 | 40.0% | 40.0% |
| E35 | Nimzo-Indian, classical, Noa variation, 5.cd ed | 57 | 24.6% | 47.4% |
| E37 | Nimzo-Indian, classical, Noa variation, main line, 7.Qc2 | 3 | 0.0% | 66.7% |
| E39 | Nimzo-Indian, classical, Pirc variation | 49 | 26.5% | 54.1% |
| E41 | Nimzo-Indian, e3, Huebner variation | 48 | 14.6% | 38.5% |
| E21 | Nimzo-Indian, three knights variation | 181 | 19.3% | 52.8% |
| E21 | Nimzo-Indian, three knights, Korchnoi variation | 3 | 0.0% | 66.7% |
| A01 | Nimzovich-Larsen attack | 55 | 18.2% | 50.9% |
| A01 | Nimzovich-Larsen attack, Dutch variation | 15 | 13.3% | 40.0% |
| A01 | Nimzovich-Larsen attack, English variation | 30 | 33.3% | 43.3% |
| A01 | Nimzovich-Larsen attack, Indian variation | 80 | 17.5% | 51.3% |
| A01 | Nimzovich-Larsen attack, classical variation | 90 | 30.0% | 40.6% |
| A01 | Nimzovich-Larsen attack, modern variation | 230 | 24.3% | 50.9% |
| A01 | Nimzovich-Larsen attack, symmetrical variation | 26 | 15.4% | 57.7% |
| A43 | Old Benoni defence | 107 | 20.6% | 56.1% |
| A44 | Old Benoni defence | 1 | 0.0% | 0.0% |
| A43 | Old Benoni, Franco-Benoni defence | 19 | 10.5% | 57.9% |
| A43 | Old Benoni, Schmid's system | 2 | 50.0% | 25.0% |
| A41 | Old Indian defence | 55 | 12.7% | 59.1% |
| A53 | Old Indian defence | 179 | 24.6% | 49.2% |
| A53 | Old Indian, Janowski variation | 5 | 20.0% | 70.0% |
| A41 | Old Indian, Tartakower (Wade) variation | 69 | 21.7% | 54.3% |
| A54 | Old Indian, Ukrainian variation | 19 | 36.8% | 71.1% |
| A54 | Old Indian, Ukrainian variation, 4.Nf3 | 20 | 25.0% | 67.5% |
| A55 | Old Indian, main line | 40 | 20.0% | 52.5% |
| A45 | Paleface attack | 40 | 17.5% | 36.3% |
| C42 | Petrov three knights game | 79 | 20.3% | 60.8% |
| C42 | Petrov's defence | 265 | 22.6% | 57.0% |
| C42 | Petrov, Cochrane gambit | 9 | 11.1% | 38.9% |
| C42 | Petrov, Cozio (Lasker) attack | 115 | 32.2% | 50.9% |
| C42 | Petrov, Damiano variation | 4 | 50.0% | 75.0% |
| C42 | Petrov, French attack | 4 | 0.0% | 25.0% |
| C42 | Petrov, Italian variation | 13 | 30.8% | 53.8% |
| C42 | Petrov, Kaufmann attack | 20 | 30.0% | 60.0% |
| C42 | Petrov, Nimzovich attack | 109 | 32.1% | 47.2% |
| C42 | Petrov, Paulsen attack | 25 | 20.0% | 50.0% |
| C43 | Petrov, Urusov gambit | 7 | 0.0% | 28.6% |
| C42 | Petrov, classical attack | 235 | 26.4% | 52.8% |
| C42 | Petrov, classical attack, Chigorin variation | 220 | 30.5% | 52.0% |
| C42 | Petrov, classical attack, Jaenisch variation | 107 | 28.0% | 57.0% |
| C42 | Petrov, classical attack, Krause variation | 1 | 100.0% | 50.0% |
| C42 | Petrov, classical attack, Maroczy variation | 1 | 0.0% | 100.0% |
| C42 | Petrov, classical attack, Marshall variation | 163 | 26.4% | 53.7% |
| C42 | Petrov, classical attack, Mason variation | 4 | 50.0% | 50.0% |
| C42 | Petrov, classical attack, close variation | 51 | 23.5% | 62.7% |
| C43 | Petrov, modern (Steinitz) attack | 45 | 22.2% | 62.2% |
| C43 | Petrov, modern attack, Bardeleben variation | 5 | 40.0% | 60.0% |
| C43 | Petrov, modern attack, Steinitz variation | 4 | 25.0% | 37.5% |
| C43 | Petrov, modern attack, Symmetrical variation | 411 | 30.2% | 51.6% |
| C43 | Petrov, modern attack, Trifunovic variation | 35 | 25.7% | 47.1% |
| C43 | Petrov, modern attack, main line | 56 | 28.6% | 53.6% |
| C41 | Philidor's defence | 54 | 24.1% | 63.9% |
| C41 | Philidor, Boden variation | 6 | 16.7% | 58.3% |
| C41 | Philidor, Hanham variation | 4 | 50.0% | 25.0% |
| C41 | Philidor, Hanham, Delmar variation | 1 | 100.0% | 50.0% |
| C41 | Philidor, Hanham, Kmoch variation | 1 | 0.0% | 0.0% |
| C41 | Philidor, Hanham, Krause variation | 7 | 57.1% | 57.1% |
| C41 | Philidor, Hanham, Schlechter variation | 19 | 26.3% | 65.8% |
| C41 | Philidor, Hanham, Steiner variation | 1 | 0.0% | 100.0% |
| C41 | Philidor, Improved Hanham variation | 101 | 14.9% | 44.1% |
| C41 | Philidor, Larsen variation | 9 | 33.3% | 83.3% |
| C41 | Philidor, Lopez counter-gambit | 2 | 0.0% | 100.0% |
| C41 | Philidor, Nimzovich (Jaenisch) variation | 19 | 31.6% | 63.2% |
| C41 | Philidor, Nimzovich variation | 5 | 20.0% | 70.0% |
| C41 | Philidor, Nimzovich, Klein variation | 3 | 0.0% | 66.7% |
| C41 | Philidor, Nimzovich, Rellstab variation | 14 | 35.7% | 75.0% |
| C41 | Philidor, Nimzovich, Sokolsky variation | 1 | 0.0% | 100.0% |
| C41 | Philidor, Nimzovich, Sozin variation | 1 | 0.0% | 100.0% |
| C41 | Philidor, Philidor counter-gambit, Zukertort variation | 3 | 0.0% | 100.0% |
| C41 | Philidor, Steinitz variation | 5 | 20.0% | 70.0% |
| C41 | Philidor, exchange variation | 62 | 19.4% | 50.0% |
| B07 | Pirc defence | 115 | 24.3% | 55.7% |
| B07 | Pirc, 150 attack | 15 | 13.3% | 73.3% |
| B09 | Pirc, Austrian attack | 35 | 20.0% | 38.6% |
| B09 | Pirc, Austrian attack, 6.Bd3 | 31 | 19.4% | 61.3% |
| B09 | Pirc, Austrian attack, 6.Be3 | 12 | 0.0% | 66.7% |
| B09 | Pirc, Austrian attack, 6.e5 | 5 | 0.0% | 60.0% |
| B09 | Pirc, Austrian attack, Ljubojevic variation | 1 | 0.0% | 100.0% |
| B09 | Pirc, Austrian attack, dragon formation | 21 | 42.9% | 54.8% |
| B07 | Pirc, Byrne variation | 25 | 16.0% | 52.0% |
| B07 | Pirc, Holmov system | 3 | 66.7% | 66.7% |
| B07 | Pirc, Sveshnikov system | 25 | 8.0% | 64.0% |
| B07 | Pirc, Ufimtsev-Pytel variation | 77 | 14.3% | 56.5% |
| B07 | Pirc, bayonet (Mariotti) attack | 3 | 0.0% | 33.3% |
| B08 | Pirc, classical (two knights) system | 72 | 20.8% | 47.9% |
| B08 | Pirc, classical system, 5.Be2 | 180 | 32.8% | 59.7% |
| B08 | Pirc, classical, h3 system | 29 | 27.6% | 65.5% |
| C44 | Ponziani counter-gambit | 11 | 9.1% | 22.7% |
| C44 | Ponziani opening | 18 | 38.9% | 41.7% |
| C44 | Ponziani, Caro variation | 6 | 16.7% | 41.7% |
| C44 | Ponziani, Jaenisch counter-attack | 48 | 43.8% | 51.0% |
| C44 | Ponziani, Reti variation | 1 | 0.0% | 100.0% |
| C44 | Ponziani, Romanishin variation | 2 | 50.0% | 75.0% |
| C44 | Ponziani, Steinitz variation | 4 | 0.0% | 100.0% |
| A42 | Pterodactyl defence | 37 | 21.6% | 51.4% |
| D21 | QGA, 3.Nf3 | 108 | 25.0% | 57.9% |
| D20 | QGA, 3.e4 | 466 | 22.7% | 56.7% |
| D26 | QGA, 4...e6 | 271 | 26.2% | 47.8% |
| D24 | QGA, 4.Nc3 | 42 | 23.8% | 57.1% |
| D25 | QGA, 4.e3 | 87 | 21.8% | 58.0% |
| D22 | QGA, Alekhine defence | 20 | 20.0% | 45.0% |
| D22 | QGA, Alekhine defence, Alatortsev variation | 3 | 33.3% | 50.0% |
| D21 | QGA, Alekhine defense, Borisenko-Furman variation | 6 | 33.3% | 50.0% |
| D24 | QGA, Bogolyubov variation | 16 | 18.8% | 34.4% |
| D21 | QGA, Ericson variation | 17 | 52.9% | 44.1% |
| D25 | QGA, Flohr variation | 7 | 28.6% | 71.4% |
| D22 | QGA, Haberditz variation | 4 | 0.0% | 75.0% |
| D25 | QGA, Janowsky-Larsen variation | 81 | 24.7% | 50.6% |
| D20 | QGA, Linares variation | 11 | 18.2% | 45.5% |
| D23 | QGA, Mannheim variation | 44 | 15.9% | 55.7% |
| D25 | QGA, Smyslov variation | 31 | 35.5% | 43.5% |
| D26 | QGA, classical variation | 187 | 21.9% | 54.8% |
| D26 | QGA, classical variation, 6.O-O | 27 | 22.2% | 40.7% |
| D27 | QGA, classical, 6...a6 | 322 | 27.6% | 53.3% |
| D28 | QGA, classical, 7...b5 | 47 | 25.5% | 46.8% |
| D28 | QGA, classical, 7.Qe2 | 14 | 28.6% | 28.6% |
| D29 | QGA, classical, 8...Bb7 | 176 | 23.9% | 48.3% |
| D27 | QGA, classical, Geller variation | 13 | 23.1% | 42.3% |
| D27 | QGA, classical, Rubinstein variation | 945 | 28.0% | 53.6% |
| D29 | QGA, classical, Smyslov variation | 13 | 23.1% | 57.7% |
| D26 | QGA, classical, Steinitz variation | 2 | 0.0% | 100.0% |
| D30 | QGD | 107 | 28.0% | 44.9% |
| D51 | QGD | 1 | 0.0% | 0.0% |
| D52 | QGD | 15 | 26.7% | 66.7% |
| D30 | QGD Slav | 75 | 29.3% | 48.0% |
| D15 | QGD Slav accepted | 7 | 14.3% | 64.3% |
| D16 | QGD Slav accepted, Alapin variation | 24 | 12.5% | 64.6% |
| D10 | QGD Slav defence | 162 | 25.3% | 53.4% |
| D10 | QGD Slav defence, Alekhine variation | 20 | 20.0% | 55.0% |
| D10 | QGD Slav defence, exchange variation | 115 | 29.6% | 51.3% |
| D11 | QGD Slav, 3.Nf3 | 413 | 21.1% | 54.4% |
| D15 | QGD Slav, 4.Nc3 | 336 | 19.6% | 54.5% |
| D11 | QGD Slav, 4.e3 | 195 | 22.6% | 50.3% |
| D12 | QGD Slav, 4.e3 Bf5 | 400 | 22.5% | 56.0% |
| D15 | QGD Slav, 5.e3 (Alekhine variation) | 24 | 16.7% | 45.8% |
| D12 | QGD Slav, Amsterdam variation | 9 | 44.4% | 44.4% |
| D11 | QGD Slav, Breyer variation | 22 | 31.8% | 43.2% |
| D17 | QGD Slav, Carlsbad variation | 71 | 31.0% | 56.3% |
| D17 | QGD Slav, Czech defence | 28 | 25.0% | 66.1% |
| D18 | QGD Slav, Dutch variation | 92 | 32.6% | 53.3% |
| D19 | QGD Slav, Dutch variation | 694 | 21.8% | 58.1% |
| D19 | QGD Slav, Dutch variation, main line | 9 | 33.3% | 72.2% |
| D18 | QGD Slav, Dutch, Lasker variation | 2 | 0.0% | 100.0% |
| D17 | QGD Slav, Krause attack | 66 | 22.7% | 58.3% |
| D15 | QGD Slav, Schlechter variation | 71 | 26.8% | 43.0% |
| D30 | QGD Slav, Semmering variation | 5 | 0.0% | 60.0% |
| D15 | QGD Slav, Slav gambit | 25 | 28.0% | 38.0% |
| D16 | QGD Slav, Smyslov variation | 6 | 16.7% | 41.7% |
| D16 | QGD Slav, Soultanbeieff variation | 11 | 27.3% | 50.0% |
| D16 | QGD Slav, Steiner variation | 35 | 28.6% | 57.1% |
| D15 | QGD Slav, Tolush-Geller gambit | 17 | 29.4% | 44.1% |
| D17 | QGD Slav, Wiesbaden variation | 147 | 23.8% | 50.7% |
| D10 | QGD Slav, Winawer counter-gambit | 37 | 21.6% | 56.8% |
| D12 | QGD Slav, exchange variation | 33 | 27.3% | 50.0% |
| D13 | QGD Slav, exchange variation | 174 | 24.7% | 52.6% |
| D14 | QGD Slav, exchange variation, 6.Bf4 Bf5 | 118 | 21.2% | 56.4% |
| D14 | QGD Slav, exchange, Trifunovic variation | 8 | 25.0% | 62.5% |
| D43 | QGD semi-Slav | 903 | 21.6% | 50.0% |
| D45 | QGD semi-Slav, 5...Nd7 | 166 | 20.5% | 49.4% |
| D44 | QGD semi-Slav, 5.Bg5 dc | 50 | 26.0% | 49.0% |
| D45 | QGD semi-Slav, 5.e3 | 144 | 22.9% | 58.0% |
| D46 | QGD semi-Slav, 6.Bd3 | 13 | 30.8% | 61.5% |
| D47 | QGD semi-Slav, 7.Bc4 | 55 | 9.1% | 48.2% |
| D46 | QGD semi-Slav, Bogolyubov variation | 57 | 36.8% | 57.0% |
| D44 | QGD semi-Slav, Botvinnik system (anti-Meran) | 47 | 23.4% | 45.7% |
| D46 | QGD semi-Slav, Chigorin defence | 135 | 20.7% | 52.6% |
| D43 | QGD semi-Slav, Hastings variation | 3 | 0.0% | 0.0% |
| D48 | QGD semi-Slav, Meran | 103 | 26.2% | 51.9% |
| D47 | QGD semi-Slav, Meran variation | 161 | 21.1% | 55.3% |
| D48 | QGD semi-Slav, Meran, 8...a6 | 1112 | 25.1% | 48.1% |
| D49 | QGD semi-Slav, Meran, Blumenfeld variation | 43 | 16.3% | 47.7% |
| D48 | QGD semi-Slav, Meran, Pirc variation | 5 | 40.0% | 60.0% |
| D49 | QGD semi-Slav, Meran, Rabinovich variation | 1 | 0.0% | 100.0% |
| D48 | QGD semi-Slav, Meran, Reynolds' variation | 26 | 11.5% | 71.2% |
| D49 | QGD semi-Slav, Meran, Sozin variation | 23 | 13.0% | 23.9% |
| D47 | QGD semi-Slav, Meran, Wade variation | 5515 | 26.9% | 53.7% |
| D48 | QGD semi-Slav, Meran, old main line | 4 | 0.0% | 100.0% |
| D46 | QGD semi-Slav, Romih variation | 37 | 18.9% | 63.5% |
| D45 | QGD semi-Slav, Rubinstein (anti-Meran) system | 6 | 50.0% | 58.3% |
| D45 | QGD semi-Slav, Stoltz variation | 1575 | 24.0% | 52.1% |
| D45 | QGD semi-Slav, accelerated Meran (Alekhine variation) | 300 | 22.0% | 53.3% |
| D44 | QGD semi-Slav, anti-Meran gambit | 300 | 20.3% | 56.5% |
| D44 | QGD semi-Slav, anti-Meran, Alatortsev system | 22 | 13.6% | 61.4% |
| D44 | QGD semi-Slav, anti-Meran, Szabo variation | 10 | 10.0% | 35.0% |
| D47 | QGD semi-Slav, neo-Meran (Lundin variation) | 219 | 26.5% | 56.6% |
| D35 | QGD, 3...Nf6 | 33 | 36.4% | 51.5% |
| D31 | QGD, 3.Nc3 | 72 | 20.8% | 53.5% |
| D50 | QGD, 4.Bg5 | 11 | 36.4% | 63.6% |
| D53 | QGD, 4.Bg5 Be7 | 35 | 37.1% | 47.1% |
| D53 | QGD, 4.Bg5 Be7, 5.e3 O-O | 2 | 50.0% | 75.0% |
| D51 | QGD, 4.Bg5 Nbd7 | 8 | 25.0% | 25.0% |
| D37 | QGD, 4.Nf3 | 907 | 23.6% | 56.2% |
| D55 | QGD, 6.Nf3 | 39 | 17.9% | 67.9% |
| D31 | QGD, Alapin variation | 12 | 8.3% | 29.2% |
| D08 | QGD, Albin counter-gambit | 34 | 23.5% | 41.2% |
| D09 | QGD, Albin counter-gambit, 5.g3 | 27 | 18.5% | 57.4% |
| D08 | QGD, Albin counter-gambit, Alapin variation | 3 | 0.0% | 33.3% |
| D08 | QGD, Albin counter-gambit, Balogh variation | 1 | 0.0% | 0.0% |
| D08 | QGD, Albin counter-gambit, Krenosz variation | 1 | 0.0% | 100.0% |
| D51 | QGD, Alekhine variation | 3 | 0.0% | 33.3% |
| D52 | QGD, Cambridge Springs defence | 8 | 25.0% | 62.5% |
| D52 | QGD, Cambridge Springs defence, 7.cd | 3 | 33.3% | 83.3% |
| D52 | QGD, Cambridge Springs defence, Argentine variation | 5 | 20.0% | 50.0% |
| D52 | QGD, Cambridge Springs defence, Bogoljubow variation | 90 | 17.8% | 52.2% |
| D52 | QGD, Cambridge Springs defence, Capablanca variation | 4 | 75.0% | 62.5% |
| D52 | QGD, Cambridge Springs defence, Rubinstein variation | 7 | 14.3% | 64.3% |
| D52 | QGD, Cambridge Springs defence, Yugoslav variation | 51 | 15.7% | 56.9% |
| D30 | QGD, Capablanca variation | 18 | 11.1% | 50.0% |
| D30 | QGD, Capablanca-Duras variation | 59 | 16.9% | 52.5% |
| D31 | QGD, Charousek (Petrosian) variation | 121 | 23.1% | 51.2% |
| D07 | QGD, Chigorin defence | 172 | 19.2% | 57.8% |
| D07 | QGD, Chigorin defence, Janowski variation | 15 | 20.0% | 63.3% |
| D06 | QGD, Grau (Sahovic) defence | 42 | 19.0% | 57.1% |
| D35 | QGD, Harrwitz attack | 3 | 0.0% | 33.3% |
| D30 | QGD, Hastings variation | 75 | 22.7% | 46.0% |
| D31 | QGD, Janowski variation | 3 | 33.3% | 50.0% |
| D56 | QGD, Lasker defence | 96 | 25.0% | 49.0% |
| D57 | QGD, Lasker defence, Bernstein variation | 2 | 0.0% | 50.0% |
| D56 | QGD, Lasker defence, Teichmann variation | 12 | 25.0% | 79.2% |
| D57 | QGD, Lasker defence, main line | 8 | 25.0% | 50.0% |
| D51 | QGD, Manhattan variation | 1 | 0.0% | 0.0% |
| D06 | QGD, Marshall defence | 4 | 0.0% | 50.0% |
| D55 | QGD, Neo-orthodox variation | 1 | 100.0% | 50.0% |
| D55 | QGD, Neo-orthodox variation, 7.Bh4 | 49 | 22.4% | 66.3% |
| D55 | QGD, Neo-orthodox variation, 7.Bxf6 | 18 | 16.7% | 63.9% |
| D60 | QGD, Orthodox defence | 18 | 16.7% | 47.2% |
| D63 | QGD, Orthodox defence | 10 | 20.0% | 60.0% |
| D62 | QGD, Orthodox defence, 7.Qc2 c5, 8.cd (Rubinstein) | 33 | 36.4% | 54.5% |
| D63 | QGD, Orthodox defence, 7.Rc1 | 18 | 33.3% | 50.0% |
| D66 | QGD, Orthodox defence, Bd3 line | 53 | 20.8% | 55.7% |
| D67 | QGD, Orthodox defence, Bd3 line | 2 | 0.0% | 100.0% |
| D67 | QGD, Orthodox defence, Bd3 line, 11.O-O | 1 | 0.0% | 100.0% |
| D67 | QGD, Orthodox defence, Bd3 line, Janowski variation | 2 | 0.0% | 100.0% |
| D66 | QGD, Orthodox defence, Bd3 line, fianchetto variation | 8 | 12.5% | 68.8% |
| D60 | QGD, Orthodox defence, Botvinnik variation | 10 | 20.0% | 40.0% |
| D63 | QGD, Orthodox defence, Capablanca variation | 1 | 0.0% | 100.0% |
| D63 | QGD, Orthodox defence, Pillsbury attack | 2 | 0.0% | 50.0% |
| D64 | QGD, Orthodox defence, Rubinstein attack (with Rc1) | 10 | 30.0% | 45.0% |
| D64 | QGD, Orthodox defence, Rubinstein attack, Gruenfeld variation | 1 | 0.0% | 0.0% |
| D64 | QGD, Orthodox defence, Rubinstein attack, Karlsbad variation | 3 | 33.3% | 50.0% |
| D65 | QGD, Orthodox defence, Rubinstein attack, main line | 5 | 20.0% | 30.0% |
| D61 | QGD, Orthodox defence, Rubinstein variation | 44 | 22.7% | 50.0% |
| D63 | QGD, Orthodox defence, Swiss (Henneberger) variation | 20 | 25.0% | 57.5% |
| D63 | QGD, Orthodox defence, Swiss, Karlsbad variation | 14 | 7.1% | 39.3% |
| D55 | QGD, Petrosian variation | 36 | 41.7% | 51.4% |
| D38 | QGD, Ragozin variation | 417 | 26.9% | 53.5% |
| D39 | QGD, Ragozin, Vienna variation | 149 | 27.5% | 46.0% |
| D40 | QGD, Semi-Tarrasch defence | 308 | 30.8% | 47.6% |
| D40 | QGD, Semi-Tarrasch defence, Pillsbury variation | 7 | 57.1% | 42.9% |
| D41 | QGD, Semi-Tarrasch with e3 | 31 | 19.4% | 48.4% |
| D41 | QGD, Semi-Tarrasch, 5.cd | 189 | 29.1% | 55.8% |
| D42 | QGD, Semi-Tarrasch, 7.Bd3 | 77 | 24.7% | 50.0% |
| D41 | QGD, Semi-Tarrasch, Kmoch variation | 4 | 25.0% | 87.5% |
| D50 | QGD, Semi-Tarrasch, Krause variation | 2 | 50.0% | 25.0% |
| D50 | QGD, Semi-Tarrasch, Primitive Pillsbury variation | 9 | 11.1% | 16.7% |
| D41 | QGD, Semi-Tarrasch, San Sebastian variation | 53 | 22.6% | 67.9% |
| D40 | QGD, Semi-Tarrasch, symmetrical variation | 14 | 14.3% | 28.6% |
| D32 | QGD, Tarrasch defence | 63 | 22.2% | 52.4% |
| D32 | QGD, Tarrasch defence, 4.cd ed | 2 | 50.0% | 25.0% |
| D32 | QGD, Tarrasch defence, Marshall gambit | 3 | 66.7% | 66.7% |
| D32 | QGD, Tarrasch defence, Tarrasch gambit | 1 | 0.0% | 0.0% |
| D33 | QGD, Tarrasch, Folkestone (Swedish) variation | 12 | 0.0% | 58.3% |
| D33 | QGD, Tarrasch, Prague variation | 28 | 17.9% | 51.8% |
| D34 | QGD, Tarrasch, Prague variation, 7...Be7 | 52 | 13.5% | 68.3% |
| D34 | QGD, Tarrasch, Prague variation, 9.Bg5 | 57 | 24.6% | 64.9% |
| D34 | QGD, Tarrasch, Prague variation, Normal position | 319 | 26.3% | 60.8% |
| D33 | QGD, Tarrasch, Schlechter-Rubinstein system | 5 | 20.0% | 50.0% |
| D33 | QGD, Tarrasch, Wagner variation | 2 | 50.0% | 75.0% |
| D58 | QGD, Tartakower (Makagonov-Bondarevsky) system | 2863 | 28.7% | 52.0% |
| D59 | QGD, Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5 | 88 | 35.2% | 54.0% |
| D59 | QGD, Tartakower variation | 5 | 20.0% | 30.0% |
| D30 | QGD, Vienna variation | 25 | 24.0% | 64.0% |
| D37 | QGD, classical variation (5.Bf4) | 996 | 28.9% | 51.3% |
| D35 | QGD, exchange variation | 56 | 21.4% | 42.9% |
| D35 | QGD, exchange, Saemisch variation | 29 | 24.1% | 63.8% |
| D35 | QGD, exchange, positional line | 101 | 14.9% | 43.1% |
| D35 | QGD, exchange, positional line, 5...c6 | 58 | 32.8% | 52.6% |
| D36 | QGD, exchange, positional line, 6.Qc2 | 10 | 30.0% | 45.0% |
| D31 | QGD, semi-Slav | 73 | 24.7% | 52.1% |
| D31 | QGD, semi-Slav, Abrahams variation | 15 | 33.3% | 56.7% |
| D31 | QGD, semi-Slav, Junge variation | 1 | 0.0% | 100.0% |
| D31 | QGD, semi-Slav, Marshall gambit | 148 | 17.6% | 52.0% |
| D31 | QGD, semi-Slav, Noteboom variation | 22 | 31.8% | 43.2% |
| C40 | QP counter-gambit (elephant gambit) | 22 | 22.7% | 56.8% |
| A50 | Queen's Indian accelerated | 3 | 0.0% | 66.7% |
| A47 | Queen's Indian defence | 47 | 17.0% | 53.2% |
| E12 | Queen's Indian defence | 26 | 42.3% | 40.4% |
| E12 | Queen's Indian, 4.Nc3 | 486 | 27.0% | 50.5% |
| E12 | Queen's Indian, 4.Nc3, Botvinnik variation | 1 | 0.0% | 0.0% |
| E13 | Queen's Indian, 4.Nc3, main line | 9 | 33.3% | 61.1% |
| E14 | Queen's Indian, 4.e3 | 277 | 23.8% | 52.3% |
| E15 | Queen's Indian, 4.g3 | 73 | 16.4% | 52.1% |
| E15 | Queen's Indian, 4.g3 Bb7 | 62 | 24.2% | 52.4% |
| E17 | Queen's Indian, 5.Bg2 Be7 | 6 | 0.0% | 50.0% |
| E15 | Queen's Indian, Buerger variation | 5 | 0.0% | 20.0% |
| E16 | Queen's Indian, Capablanca variation | 22 | 27.3% | 63.6% |
| E17 | Queen's Indian, Euwe variation | 3 | 33.3% | 50.0% |
| A47 | Queen's Indian, Marienbad system | 1 | 0.0% | 100.0% |
| E12 | Queen's Indian, Miles variation | 66 | 18.2% | 53.0% |
| E15 | Queen's Indian, Nimzovich variation (exaggerated fianchetto) | 4552 | 25.0% | 54.4% |
| E17 | Queen's Indian, Opovcensky variation | 63 | 31.7% | 69.8% |
| E12 | Queen's Indian, Petrosian system | 963 | 25.3% | 54.1% |
| E16 | Queen's Indian, Riumin variation | 4 | 25.0% | 62.5% |
| E15 | Queen's Indian, Rubinstein variation | 17 | 5.9% | 50.0% |
| E16 | Queen's Indian, Yates variation | 46 | 28.3% | 62.0% |
| E17 | Queen's Indian, anti-Queen's Indian system | 22 | 31.8% | 47.7% |
| E17 | Queen's Indian, old main line, 6.O-O | 47 | 19.1% | 52.1% |
| E18 | Queen's Indian, old main line, 7.Nc3 | 141 | 26.2% | 56.4% |
| E19 | Queen's Indian, old main line, 9.Qxc3 | 147 | 21.8% | 57.1% |
| A41 | Queen's Pawn | 116 | 13.8% | 50.0% |
| D02 | Queen's bishop game | 532 | 22.7% | 50.5% |
| D20 | Queen's gambit accepted | 119 | 25.2% | 48.7% |
| D23 | Queen's gambit accepted | 2 | 0.0% | 0.0% |
| D30 | Queen's gambit declined | 385 | 25.5% | 54.0% |
| A40 | Queen's pawn | 220 | 22.3% | 49.3% |
| A45 | Queen's pawn game | 463 | 24.8% | 52.4% |
| A46 | Queen's pawn game | 373 | 22.0% | 52.8% |
| A50 | Queen's pawn game | 51 | 25.5% | 57.8% |
| D00 | Queen's pawn game | 207 | 15.9% | 53.9% |
| D02 | Queen's pawn game | 1942 | 22.1% | 52.8% |
| D04 | Queen's pawn game | 274 | 22.3% | 52.0% |
| D05 | Queen's pawn game | 328 | 26.5% | 55.6% |
| E00 | Queen's pawn game | 106 | 20.8% | 50.9% |
| E10 | Queen's pawn game | 805 | 25.7% | 55.1% |
| D02 | Queen's pawn game, Chigorin variation | 265 | 23.8% | 54.5% |
| D02 | Queen's pawn game, Krause variation | 141 | 26.2% | 47.2% |
| D05 | Queen's pawn game, Rubinstein (Colle-Zukertort) variation | 26 | 23.1% | 73.1% |
| D05 | Queen's pawn game, Zukertort variation | 15 | 20.0% | 56.7% |
| D00 | Queen's pawn, Chigorin variation | 567 | 20.1% | 52.7% |
| A40 | Queen's pawn, Franco-Indian (Keres) defence | 81 | 34.6% | 60.5% |
| A40 | Queen's pawn, Keres defence | 62 | 12.9% | 59.7% |
| A40 | Queen's pawn, Lundin (Kevitz-Mikenas) defence | 24 | 16.7% | 58.3% |
| D00 | Queen's pawn, Mason variation | 327 | 19.0% | 53.5% |
| D00 | Queen's pawn, Mason variation, Steinitz counter-gambit | 38 | 18.4% | 43.4% |
| E60 | Queen's pawn, Mengarini attack | 6 | 16.7% | 75.0% |
| A46 | Queen's pawn, Torre attack | 112 | 26.8% | 51.8% |
| A46 | Queen's pawn, Torre attack, Wagner gambit | 1 | 0.0% | 0.0% |
| A46 | Queen's pawn, Yusupov-Rubinstein system | 39 | 25.6% | 61.5% |
| D00 | Queen's pawn, stonewall attack | 1 | 100.0% | 50.0% |
| A09 | Reti accepted | 41 | 19.5% | 65.9% |
| A09 | Reti accepted, Keres variation | 4 | 25.0% | 62.5% |
| A04 | Reti opening | 851 | 20.7% | 52.9% |
| A05 | Reti opening | 624 | 21.8% | 51.4% |
| A06 | Reti opening | 500 | 22.4% | 58.2% |
| A09 | Reti opening | 25 | 32.0% | 64.0% |
| A04 | Reti v Dutch | 215 | 14.9% | 62.3% |
| A05 | Reti, King's Indian attack | 49 | 18.4% | 58.2% |
| A07 | Reti, King's Indian attack | 92 | 17.4% | 57.6% |
| A08 | Reti, King's Indian attack | 100 | 19.0% | 47.5% |
| A07 | Reti, King's Indian attack (Barcza system) | 807 | 21.4% | 50.4% |
| A07 | Reti, King's Indian attack (with ...c5) | 62 | 25.8% | 48.4% |
| A08 | Reti, King's Indian attack, French variation | 10 | 10.0% | 35.0% |
| A07 | Reti, King's Indian attack, Keres variation | 33 | 33.3% | 50.0% |
| A05 | Reti, King's Indian attack, Reti-Smyslov variation | 1 | 0.0% | 0.0% |
| A05 | Reti, King's Indian attack, Spassky's variation | 21 | 28.6% | 61.9% |
| A07 | Reti, King's Indian attack, Yugoslav variation | 491 | 27.5% | 54.9% |
| A06 | Reti, Nimzovich-Larsen attack | 317 | 22.1% | 52.4% |
| A04 | Reti, Pirc-Lisitsin gambit | 2 | 0.0% | 100.0% |
| A09 | Reti, advance variation | 84 | 17.9% | 54.2% |
| A06 | Reti, old Indian attack | 6 | 0.0% | 16.7% |
| D01 | Richter-Veresov attack | 209 | 26.8% | 48.8% |
| D01 | Richter-Veresov attack, Richter variation | 7 | 0.0% | 42.9% |
| D01 | Richter-Veresov attack, Veresov variation | 6 | 50.0% | 58.3% |
| B06 | Robatsch (modern) defence | 204 | 19.1% | 56.1% |
| B06 | Robatsch defence | 20 | 15.0% | 62.5% |
| B07 | Robatsch defence, Geller's system | 34 | 20.6% | 66.2% |
| B06 | Robatsch defence, Gurgenidze variation | 4 | 50.0% | 75.0% |
| B06 | Robatsch defence, Pseudo-Austrian attack | 11 | 27.3% | 59.1% |
| A41 | Robatsch defence, Rossolimo variation | 10 | 20.0% | 70.0% |
| B06 | Robatsch defence, Two knights variation | 11 | 36.4% | 54.5% |
| B06 | Robatsch defence, Two knights, Suttles variation | 51 | 29.4% | 53.9% |
| B06 | Robatsch defence, three pawns attack | 1 | 100.0% | 50.0% |
| C70 | Ruy Lopez | 12 | 25.0% | 37.5% |
| C60 | Ruy Lopez (Spanish opening) | 21 | 9.5% | 52.4% |
| C78 | Ruy Lopez, ...b5 & ...d6 | 2 | 0.0% | 50.0% |
| C78 | Ruy Lopez, 5.O-O | 128 | 24.2% | 50.4% |
| C77 | Ruy Lopez, Anderssen variation | 56 | 26.8% | 43.8% |
| C78 | Ruy Lopez, Archangelsk (counterthrust) variation | 70 | 32.9% | 42.1% |
| C65 | Ruy Lopez, Berlin defence | 62 | 32.3% | 58.1% |
| C65 | Ruy Lopez, Berlin defence, 4.O-O | 10 | 20.0% | 70.0% |
| C66 | Ruy Lopez, Berlin defence, 4.O-O, d6 | 10 | 10.0% | 55.0% |
| C65 | Ruy Lopez, Berlin defence, Anderssen variation | 1 | 100.0% | 50.0% |
| C65 | Ruy Lopez, Berlin defence, Beverwijk variation | 36 | 25.0% | 40.3% |
| C65 | Ruy Lopez, Berlin defence, Kaufmann variation | 1 | 0.0% | 100.0% |
| C67 | Ruy Lopez, Berlin defence, Minckwitz variation | 2 | 0.0% | 100.0% |
| C65 | Ruy Lopez, Berlin defence, Nyholm attack | 8 | 37.5% | 81.3% |
| C67 | Ruy Lopez, Berlin defence, Winawer attack | 3 | 100.0% | 50.0% |
| C66 | Ruy Lopez, Berlin defence, hedgehog variation | 15 | 40.0% | 60.0% |
| C67 | Ruy Lopez, Berlin defence, open variation | 294 | 27.6% | 52.9% |
| C61 | Ruy Lopez, Bird's defence | 17 | 11.8% | 58.8% |
| C61 | Ruy Lopez, Bird's defence, Paulsen variation | 4 | 0.0% | 25.0% |
| C70 | Ruy Lopez, Caro variation | 5 | 20.0% | 70.0% |
| C70 | Ruy Lopez, Classical defence deferred | 150 | 26.0% | 52.3% |
| C60 | Ruy Lopez, Cozio defence | 28 | 7.1% | 60.7% |
| C60 | Ruy Lopez, Cozio defence, Paulsen variation | 10 | 50.0% | 55.0% |
| C85 | Ruy Lopez, Exchange variation doubly deferred (DERLD) | 31 | 29.0% | 53.2% |
| C70 | Ruy Lopez, Graz variation | 1 | 0.0% | 100.0% |
| C89 | Ruy Lopez, Marshall counter-attack | 25 | 12.0% | 50.0% |
| C89 | Ruy Lopez, Marshall counter-attack, 11...c6 | 15 | 40.0% | 33.3% |
| C89 | Ruy Lopez, Marshall, Herman Steiner variation | 1 | 0.0% | 0.0% |
| C89 | Ruy Lopez, Marshall, Kevitz variation | 1 | 0.0% | 0.0% |
| C89 | Ruy Lopez, Marshall, main line, 12.d2d4 | 12 | 16.7% | 41.7% |
| C89 | Ruy Lopez, Marshall, main line, 14...Qh3 | 2 | 0.0% | 50.0% |
| C78 | Ruy Lopez, Moeller defence | 84 | 26.2% | 51.2% |
| C77 | Ruy Lopez, Morphy defence | 33 | 18.2% | 54.5% |
| C77 | Ruy Lopez, Morphy defence, Duras variation | 6 | 66.7% | 50.0% |
| C63 | Ruy Lopez, Schliemann defence | 11 | 45.5% | 68.2% |
| C70 | Ruy Lopez, Schliemann defence deferred | 12 | 8.3% | 45.8% |
| C63 | Ruy Lopez, Schliemann defence, Berger variation | 24 | 12.5% | 47.9% |
| C74 | Ruy Lopez, Siesta, Kopayev variation | 9 | 22.2% | 33.3% |
| C79 | Ruy Lopez, Steinitz defence deferred (Russian defence) | 37 | 16.2% | 54.1% |
| C79 | Ruy Lopez, Steinitz defence deferred, Lipnitsky variation | 3 | 33.3% | 50.0% |
| C70 | Ruy Lopez, Taimanov (chase/wing/accelerated counterthrust) variation | 10 | 20.0% | 50.0% |
| C88 | Ruy Lopez, Trajkovic counter-attack | 16 | 12.5% | 37.5% |
| C77 | Ruy Lopez, Treybal (Bayreuth) variation (exchange var. deferred) | 5 | 60.0% | 70.0% |
| C77 | Ruy Lopez, Wormald (Alapin) attack | 21 | 23.8% | 59.5% |
| C86 | Ruy Lopez, Worrall attack | 7 | 28.6% | 57.1% |
| C86 | Ruy Lopez, Worrall attack, sharp line | 18 | 33.3% | 44.4% |
| C86 | Ruy Lopez, Worrall attack, solid line | 24 | 37.5% | 43.8% |
| C64 | Ruy Lopez, classical (Cordel) defence | 25 | 16.0% | 64.0% |
| C64 | Ruy Lopez, classical defence, 4.c3 | 38 | 26.3% | 52.6% |
| C64 | Ruy Lopez, classical defence, Benelux variation | 29 | 31.0% | 50.0% |
| C88 | Ruy Lopez, closed | 49 | 18.4% | 41.8% |
| C96 | Ruy Lopez, closed (10...c5) | 38 | 28.9% | 67.1% |
| C96 | Ruy Lopez, closed (8...Na5) | 6 | 50.0% | 58.3% |
| C90 | Ruy Lopez, closed (with ...d6) | 781 | 27.8% | 52.6% |
| C66 | Ruy Lopez, closed Berlin defence, Bernstein variation | 1 | 0.0% | 0.0% |
| C66 | Ruy Lopez, closed Berlin defence, Showalter variation | 4 | 50.0% | 75.0% |
| C66 | Ruy Lopez, closed Berlin defence, Wolf variation | 18 | 44.4% | 50.0% |
| C84 | Ruy Lopez, closed defence | 47 | 29.8% | 46.8% |
| C88 | Ruy Lopez, closed, 7...O-O | 94 | 29.8% | 47.9% |
| C91 | Ruy Lopez, closed, 9.d4 | 1097 | 25.7% | 54.1% |
| C92 | Ruy Lopez, closed, 9.h3 | 35 | 22.9% | 57.1% |
| C87 | Ruy Lopez, closed, Averbach variation | 43 | 14.0% | 51.2% |
| C91 | Ruy Lopez, closed, Bogolyubov variation | 1279 | 26.8% | 50.1% |
| C96 | Ruy Lopez, closed, Borisenko defence | 5 | 40.0% | 40.0% |
| C97 | Ruy Lopez, closed, Chigorin defence | 42 | 19.0% | 59.5% |
| C92 | Ruy Lopez, closed, Flohr-Zaitsev system (Lenzerheide variation) | 37 | 37.8% | 73.0% |
| C96 | Ruy Lopez, closed, Keres (...Nd7) defence | 1 | 0.0% | 100.0% |
| C92 | Ruy Lopez, closed, Keres (9...a5) variation | 5 | 0.0% | 40.0% |
| C92 | Ruy Lopez, closed, Kholmov variation | 30 | 6.7% | 56.7% |
| C90 | Ruy Lopez, closed, Pilnik variation | 1035 | 23.6% | 53.4% |
| C96 | Ruy Lopez, closed, Rossolimo defence | 2 | 50.0% | 75.0% |
| C93 | Ruy Lopez, closed, Smyslov defence | 4 | 0.0% | 75.0% |
| C90 | Ruy Lopez, closed, Suetin variation | 5 | 20.0% | 90.0% |
| C88 | Ruy Lopez, closed, anti-Marshall 8.a4 | 38 | 26.3% | 50.0% |
| C84 | Ruy Lopez, closed, centre attack | 21 | 28.6% | 47.6% |
| C68 | Ruy Lopez, exchange variation | 54 | 29.6% | 50.0% |
| C69 | Ruy Lopez, exchange variation, 5.O-O | 35 | 14.3% | 47.1% |
| C69 | Ruy Lopez, exchange variation, Alapin gambit | 5 | 0.0% | 60.0% |
| C68 | Ruy Lopez, exchange, Alekhine variation | 19 | 21.1% | 47.4% |
| C69 | Ruy Lopez, exchange, Bronstein variation | 37 | 32.4% | 45.9% |
| C69 | Ruy Lopez, exchange, Gligoric variation | 52 | 34.6% | 53.8% |
| C68 | Ruy Lopez, exchange, Keres variation | 32 | 34.4% | 48.4% |
| C68 | Ruy Lopez, exchange, Romanovsky variation | 6 | 16.7% | 25.0% |
| C60 | Ruy Lopez, fianchetto (Smyslov/Barnes) defence | 40 | 30.0% | 40.0% |
| C77 | Ruy Lopez, four knights (Tarrasch) variation | 24 | 12.5% | 64.6% |
| C71 | Ruy Lopez, modern Steinitz defence | 5 | 40.0% | 40.0% |
| C74 | Ruy Lopez, modern Steinitz defence | 11 | 54.5% | 54.5% |
| C75 | Ruy Lopez, modern Steinitz defence | 11 | 27.3% | 68.2% |
| C72 | Ruy Lopez, modern Steinitz defence, 5.O-O | 34 | 26.5% | 60.3% |
| C73 | Ruy Lopez, modern Steinitz defence, Alapin variation | 15 | 33.3% | 36.7% |
| C71 | Ruy Lopez, modern Steinitz defence, Duras (Keres) variation | 13 | 23.1% | 57.7% |
| C73 | Ruy Lopez, modern Steinitz defence, Richter variation | 9 | 44.4% | 55.6% |
| C75 | Ruy Lopez, modern Steinitz defence, Rubinstein variation | 3 | 100.0% | 50.0% |
| C71 | Ruy Lopez, modern Steinitz defence, Three knights variation | 2 | 50.0% | 75.0% |
| C76 | Ruy Lopez, modern Steinitz defence, fianchetto (Bronstein) variation | 27 | 33.3% | 53.7% |
| C74 | Ruy Lopez, modern Steinitz defence, siesta variation | 3 | 66.7% | 33.3% |
| C62 | Ruy Lopez, old Steinitz defence | 39 | 20.5% | 46.2% |
| C62 | Ruy Lopez, old Steinitz defence, Nimzovich attack | 10 | 10.0% | 55.0% |
| C80 | Ruy Lopez, open (Tarrasch) defence | 17 | 29.4% | 44.1% |
| C67 | Ruy Lopez, open Berlin defence, 5...Be7 | 6 | 50.0% | 58.3% |
| C67 | Ruy Lopez, open Berlin defence, l'Hermet variation | 9 | 22.2% | 55.6% |
| C80 | Ruy Lopez, open, 6.d4 | 16 | 31.3% | 65.6% |
| C80 | Ruy Lopez, open, 7.Bb3 | 6 | 33.3% | 16.7% |
| C80 | Ruy Lopez, open, 8...Be6 | 228 | 29.4% | 44.5% |
| C83 | Ruy Lopez, open, 9...Be7, 10.Re1 | 1 | 0.0% | 100.0% |
| C80 | Ruy Lopez, open, Bernstein variation | 18 | 22.2% | 55.6% |
| C82 | Ruy Lopez, open, Dilworth variation | 2 | 0.0% | 50.0% |
| C80 | Ruy Lopez, open, Friess attack | 1 | 0.0% | 100.0% |
| C81 | Ruy Lopez, open, Howell attack | 5 | 0.0% | 80.0% |
| C82 | Ruy Lopez, open, Italian variation | 10 | 20.0% | 70.0% |
| C82 | Ruy Lopez, open, Motzko attack | 3 | 0.0% | 100.0% |
| C82 | Ruy Lopez, open, Motzko attack, Nenarokov variation | 1 | 0.0% | 0.0% |
| C80 | Ruy Lopez, open, Riga variation | 13 | 30.8% | 53.8% |
| C82 | Ruy Lopez, open, St. Petersburg variation | 8 | 62.5% | 56.3% |
| C80 | Ruy Lopez, open, Tartakower variation | 3 | 0.0% | 33.3% |
| C83 | Ruy Lopez, open, classical defence | 6 | 33.3% | 50.0% |
| A00 | Saragossa opening | 67 | 11.9% | 47.8% |
| B01 | Scandinavian (centre counter) defence | 213 | 19.2% | 61.7% |
| B01 | Scandinavian defence | 140 | 23.6% | 49.6% |
| B01 | Scandinavian defence, Gruenfeld variation | 2 | 0.0% | 50.0% |
| B01 | Scandinavian defence, Lasker variation | 2 | 0.0% | 50.0% |
| B01 | Scandinavian gambit | 46 | 19.6% | 40.2% |
| B01 | Scandinavian, Anderssen counter-attack, Goteborg system | 1 | 0.0% | 100.0% |
| B01 | Scandinavian, Icelandic gambit | 22 | 31.8% | 43.2% |
| B01 | Scandinavian, Marshall variation | 66 | 16.7% | 50.8% |
| B01 | Scandinavian, Pytel-Wade variation | 25 | 16.0% | 60.0% |
| B01 | Scandinavian, Richter variation | 2 | 0.0% | 50.0% |
| C44 | Scotch gambit | 7 | 14.3% | 35.7% |
| C44 | Scotch gambit, Benima defence | 10 | 30.0% | 85.0% |
| C44 | Scotch gambit, Dubois-Reti defence | 47 | 34.0% | 46.8% |
| C45 | Scotch game | 301 | 22.3% | 49.3% |
| C44 | Scotch opening | 9 | 0.0% | 33.3% |
| C45 | Scotch, Blackburne attack | 4 | 25.0% | 37.5% |
| C44 | Scotch, Goering gambit | 33 | 18.2% | 48.5% |
| C44 | Scotch, Goering gambit, Bardeleben variation | 1 | 0.0% | 0.0% |
| C45 | Scotch, Horwitz attack | 13 | 23.1% | 42.3% |
| C44 | Scotch, Lolli variation | 25 | 8.0% | 64.0% |
| C45 | Scotch, Meitner variation | 3 | 0.0% | 33.3% |
| C45 | Scotch, Mieses variation | 84 | 28.6% | 52.4% |
| C45 | Scotch, Paulsen attack | 1 | 0.0% | 0.0% |
| C45 | Scotch, Potter variation | 33 | 21.2% | 50.0% |
| C45 | Scotch, Pulling counter-attack | 8 | 25.0% | 37.5% |
| C44 | Scotch, Relfsson gambit ('MacLopez') | 11 | 18.2% | 36.4% |
| C45 | Scotch, Romanishin variation | 4 | 25.0% | 62.5% |
| C45 | Scotch, Schmidt variation | 160 | 21.9% | 50.3% |
| C45 | Scotch, Steinitz variation | 11 | 18.2% | 72.7% |
| C45 | Scotch, Tartakower variation | 1 | 0.0% | 0.0% |
| A44 | Semi-Benoni (`blockade variation') | 8 | 12.5% | 31.3% |
| B50 | Sicilian | 501 | 23.4% | 54.8% |
| B54 | Sicilian | 126 | 20.6% | 50.0% |
| B56 | Sicilian | 244 | 22.1% | 55.3% |
| B20 | Sicilian defence | 158 | 22.2% | 48.4% |
| B30 | Sicilian defence | 398 | 22.9% | 51.4% |
| B32 | Sicilian defence | 48 | 22.9% | 61.5% |
| B33 | Sicilian defence | 64 | 29.7% | 41.4% |
| B40 | Sicilian defence | 803 | 22.7% | 52.4% |
| B44 | Sicilian defence | 94 | 23.4% | 43.6% |
| B22 | Sicilian, 2.c3, Heidenfeld variation | 3 | 33.3% | 83.3% |
| B27 | Sicilian, Acton extension | 3 | 33.3% | 16.7% |
| B22 | Sicilian, Alapin's variation (2.c3) | 882 | 25.7% | 53.6% |
| B40 | Sicilian, Anderssen variation | 111 | 23.4% | 51.4% |
| B58 | Sicilian, Boleslavsky variation | 28 | 21.4% | 53.6% |
| B59 | Sicilian, Boleslavsky variation, 7.Nb3 | 3 | 33.3% | 50.0% |
| B58 | Sicilian, Boleslavsky, Louma variation | 7 | 14.3% | 50.0% |
| B51 | Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack | 252 | 25.8% | 55.0% |
| B52 | Sicilian, Canal-Sokolsky attack, 3...Bd7 | 136 | 29.4% | 50.7% |
| B52 | Sicilian, Canal-Sokolsky attack, Bronstein gambit | 28 | 25.0% | 37.5% |
| B52 | Sicilian, Canal-Sokolsky attack, Sokolsky variation | 81 | 33.3% | 50.0% |
| B53 | Sicilian, Chekhover variation | 70 | 35.7% | 49.3% |
| B53 | Sicilian, Chekhover, Zaitsev variation | 4 | 25.0% | 37.5% |
| B32 | Sicilian, Flohr variation | 13 | 7.7% | 73.1% |
| B21 | Sicilian, Grand Prix attack | 126 | 23.0% | 41.7% |
| B23 | Sicilian, Grand Prix attack | 53 | 17.0% | 55.7% |
| B27 | Sicilian, Hungarian variation | 176 | 17.0% | 54.5% |
| B41 | Sicilian, Kan variation | 28 | 39.3% | 58.9% |
| B42 | Sicilian, Kan, 5.Bd3 | 146 | 21.2% | 50.3% |
| B43 | Sicilian, Kan, 5.Nc3 | 137 | 27.7% | 53.3% |
| B42 | Sicilian, Kan, Gipslis variation | 9 | 33.3% | 61.1% |
| B41 | Sicilian, Kan, Maroczy bind (Reti variation) | 38 | 21.1% | 63.2% |
| B42 | Sicilian, Kan, Polugaievsky variation | 76 | 21.1% | 46.1% |
| B42 | Sicilian, Kan, Swiss cheese variation | 12 | 25.0% | 79.2% |
| B27 | Sicilian, Katalimov variation | 15 | 13.3% | 80.0% |
| B20 | Sicilian, Keres variation (2.Ne2) | 34 | 14.7% | 39.7% |
| B32 | Sicilian, Labourdonnais-Loewenthal (Kalashnikov) variation | 24 | 37.5% | 43.8% |
| B32 | Sicilian, Labourdonnais-Loewenthal variation | 16 | 18.8% | 78.1% |
| B57 | Sicilian, Magnus Smith trap | 6 | 0.0% | 66.7% |
| B40 | Sicilian, Marshall variation | 8 | 12.5% | 43.8% |
| B90 | Sicilian, Najdorf | 191 | 22.5% | 51.6% |
| B98 | Sicilian, Najdorf variation | 37 | 18.9% | 33.8% |
| B95 | Sicilian, Najdorf, 6...e6 | 25 | 40.0% | 48.0% |
| B94 | Sicilian, Najdorf, 6.Bg5 | 20 | 35.0% | 57.5% |
| B93 | Sicilian, Najdorf, 6.f4 | 54 | 22.2% | 48.1% |
| B98 | Sicilian, Najdorf, 7...Be7 | 5 | 0.0% | 40.0% |
| B99 | Sicilian, Najdorf, 7...Be7 main line | 23 | 17.4% | 60.9% |
| B97 | Sicilian, Najdorf, 7...Qb6 | 149 | 19.5% | 44.6% |
| B96 | Sicilian, Najdorf, 7.f4 | 24 | 29.2% | 43.8% |
| B90 | Sicilian, Najdorf, Adams attack | 2 | 0.0% | 50.0% |
| B90 | Sicilian, Najdorf, Byrne (English) attack | 3196 | 22.7% | 50.7% |
| B90 | Sicilian, Najdorf, Lipnitzky attack | 51 | 25.5% | 48.0% |
| B92 | Sicilian, Najdorf, Opovcensky variation | 487 | 26.1% | 51.2% |
| B97 | Sicilian, Najdorf, Poisoned pawn variation | 397 | 19.4% | 44.2% |
| B96 | Sicilian, Najdorf, Polugayevsky variation | 2 | 0.0% | 0.0% |
| B96 | Sicilian, Najdorf, Polugayevsky, Simagin variation | 2 | 0.0% | 50.0% |
| B91 | Sicilian, Najdorf, Zagreb (fianchetto) variation | 30 | 26.7% | 50.0% |
| B31 | Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6) | 175 | 26.3% | 56.6% |
| B30 | Sicilian, Nimzovich-Rossolimo attack (without ...d6) | 239 | 20.9% | 54.4% |
| B31 | Sicilian, Nimzovich-Rossolimo attack, Gurgenidze variation | 1 | 0.0% | 100.0% |
| B29 | Sicilian, Nimzovich-Rubinstein variation | 20 | 35.0% | 47.5% |
| B29 | Sicilian, Nimzovich-Rubinstein; Rubinstein counter-gambit | 4 | 25.0% | 37.5% |
| B28 | Sicilian, O'Kelly variation | 79 | 24.1% | 58.9% |
| B33 | Sicilian, Pelikan (Lasker/Sveshnikov) variation | 34 | 11.8% | 58.8% |
| B33 | Sicilian, Pelikan, Bird variation | 8 | 37.5% | 56.3% |
| B33 | Sicilian, Pelikan, Chelyabinsk variation | 99 | 20.2% | 52.5% |
| B40 | Sicilian, Pin variation (Sicilian counter-attack) | 2 | 0.0% | 50.0% |
| B40 | Sicilian, Pin, Jaffe variation | 1 | 0.0% | 100.0% |
| B40 | Sicilian, Pin, Koch variation | 3 | 33.3% | 50.0% |
| B54 | Sicilian, Prins (Moscow) variation | 71 | 26.8% | 43.0% |
| B55 | Sicilian, Prins variation, Venice attack | 8 | 12.5% | 43.8% |
| B60 | Sicilian, Richter-Rauzer | 26 | 30.8% | 46.2% |
| B62 | Sicilian, Richter-Rauzer, 6...e6 | 22 | 22.7% | 34.1% |
| B60 | Sicilian, Richter-Rauzer, Bondarevsky variation | 6 | 16.7% | 58.3% |
| B62 | Sicilian, Richter-Rauzer, Keres variation | 10 | 30.0% | 55.0% |
| B60 | Sicilian, Richter-Rauzer, Larsen variation | 23 | 21.7% | 45.7% |
| B61 | Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2 | 18 | 5.6% | 41.7% |
| B62 | Sicilian, Richter-Rauzer, Margate (Alekhine) variation | 18 | 33.3% | 55.6% |
| B62 | Sicilian, Richter-Rauzer, Podvebrady variation | 4 | 25.0% | 37.5% |
| B63 | Sicilian, Richter-Rauzer, Rauzer attack | 18 | 16.7% | 41.7% |
| B63 | Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 | 154 | 16.9% | 55.2% |
| B65 | Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9...Nxd4 | 14 | 14.3% | 50.0% |
| B64 | Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9.f4 | 2 | 0.0% | 100.0% |
| B66 | Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 | 2808 | 20.6% | 47.9% |
| B69 | Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 11.Bxf6 | 1 | 0.0% | 100.0% |
| B67 | Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 8...Bd7 | 274 | 19.7% | 50.0% |
| B68 | Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 9...Be7 | 9 | 11.1% | 38.9% |
| B84 | Sicilian, Scheveningen (Paulsen), classical variation | 930 | 25.6% | 50.1% |
| B80 | Sicilian, Scheveningen variation | 103 | 18.4% | 50.0% |
| B83 | Sicilian, Scheveningen, 6.Be2 | 29 | 41.4% | 51.7% |
| B82 | Sicilian, Scheveningen, 6.f4 | 49 | 24.5% | 49.0% |
| B80 | Sicilian, Scheveningen, English variation | 39 | 20.5% | 43.6% |
| B81 | Sicilian, Scheveningen, Keres attack | 318 | 20.4% | 53.3% |
| B82 | Sicilian, Scheveningen, Tal variation | 19 | 21.1% | 73.7% |
| B80 | Sicilian, Scheveningen, Vitolins variation | 16 | 6.3% | 46.9% |
| B85 | Sicilian, Scheveningen, classical | 12 | 41.7% | 45.8% |
| B85 | Sicilian, Scheveningen, classical main line | 12 | 25.0% | 54.2% |
| B85 | Sicilian, Scheveningen, classical variation with ...Qc7 and ...Nc6 | 1 | 0.0% | 0.0% |
| B84 | Sicilian, Scheveningen, classical, Nd7 system | 4 | 0.0% | 25.0% |
| B80 | Sicilian, Scheveningen, fianchetto variation | 32 | 18.8% | 46.9% |
| B21 | Sicilian, Smith-Morra gambit | 49 | 14.3% | 52.0% |
| B86 | Sicilian, Sozin attack | 14 | 14.3% | 28.6% |
| B87 | Sicilian, Sozin with ...a6 and ...b5 | 21 | 28.6% | 61.9% |
| B89 | Sicilian, Sozin, 7.Be3 | 198 | 16.7% | 53.8% |
| B57 | Sicilian, Sozin, Benko variation | 105 | 21.0% | 47.6% |
| B88 | Sicilian, Sozin, Leonhardt variation | 55 | 27.3% | 39.1% |
| B57 | Sicilian, Sozin, not Scheveningen | 17 | 23.5% | 47.1% |
| B20 | Sicilian, Steinitz variation | 81 | 19.8% | 51.9% |
| B33 | Sicilian, Sveshnikov variation | 7 | 28.6% | 42.9% |
| B44 | Sicilian, Szen (`anti-Taimanov') variation | 157 | 26.8% | 55.4% |
| B44 | Sicilian, Szen variation, Dely-Kasparov gambit | 6 | 33.3% | 50.0% |
| B44 | Sicilian, Szen, hedgehog variation | 12 | 33.3% | 66.7% |
| B47 | Sicilian, Taimanov (Bastrikov) variation | 984 | 26.8% | 53.5% |
| B45 | Sicilian, Taimanov variation | 363 | 25.3% | 51.0% |
| B46 | Sicilian, Taimanov variation | 607 | 23.7% | 55.5% |
| B48 | Sicilian, Taimanov variation | 402 | 26.9% | 51.7% |
| B49 | Sicilian, Taimanov variation | 188 | 21.3% | 57.4% |
| B45 | Sicilian, Taimanov, American attack | 8 | 37.5% | 31.3% |
| B89 | Sicilian, Velimirovic attack | 82 | 18.3% | 43.3% |
| B56 | Sicilian, Venice attack | 6 | 16.7% | 75.0% |
| B39 | Sicilian, accelerated fianchetto, Breyer variation | 31 | 41.9% | 50.0% |
| B36 | Sicilian, accelerated fianchetto, Gurgenidze variation | 24 | 37.5% | 52.1% |
| B36 | Sicilian, accelerated fianchetto, Maroczy bind | 76 | 30.3% | 50.7% |
| B37 | Sicilian, accelerated fianchetto, Maroczy bind, 5...Bg7 | 24 | 29.2% | 47.9% |
| B38 | Sicilian, accelerated fianchetto, Maroczy bind, 6.Be3 | 67 | 22.4% | 57.5% |
| B34 | Sicilian, accelerated fianchetto, exchange variation | 7 | 14.3% | 64.3% |
| B34 | Sicilian, accelerated fianchetto, modern variation | 61 | 13.1% | 54.1% |
| B35 | Sicilian, accelerated fianchetto, modern variation with Bc4 | 99 | 27.3% | 52.0% |
| B23 | Sicilian, chameleon variation | 25 | 16.0% | 40.0% |
| B58 | Sicilian, classical | 12 | 41.7% | 45.8% |
| B23 | Sicilian, closed | 227 | 22.0% | 53.3% |
| B24 | Sicilian, closed | 69 | 21.7% | 47.1% |
| B25 | Sicilian, closed | 12 | 25.0% | 54.2% |
| B23 | Sicilian, closed, 2...Nc6 | 137 | 19.0% | 50.4% |
| B26 | Sicilian, closed, 6.Be3 | 30 | 16.7% | 55.0% |
| B25 | Sicilian, closed, 6.Ne2 e5 (Botvinnik) | 5 | 0.0% | 60.0% |
| B25 | Sicilian, closed, 6.f4 | 34 | 14.7% | 42.6% |
| B25 | Sicilian, closed, 6.f4 e5 (Botvinnik) | 30 | 23.3% | 48.3% |
| B23 | Sicilian, closed, Korchnoi variation | 8 | 25.0% | 37.5% |
| B70 | Sicilian, dragon variation | 33 | 27.3% | 53.0% |
| B72 | Sicilian, dragon, 6.Be3 | 20 | 15.0% | 47.5% |
| B71 | Sicilian, dragon, Levenfish variation | 5 | 0.0% | 40.0% |
| B75 | Sicilian, dragon, Yugoslav attack | 41 | 31.7% | 50.0% |
| B76 | Sicilian, dragon, Yugoslav attack, 7...O-O | 172 | 25.0% | 39.8% |
| B77 | Sicilian, dragon, Yugoslav attack, 9.Bc4 | 8 | 12.5% | 56.3% |
| B76 | Sicilian, dragon, Yugoslav attack, Rauser variation | 108 | 20.4% | 62.0% |
| B72 | Sicilian, dragon, classical attack | 5 | 40.0% | 60.0% |
| B73 | Sicilian, dragon, classical, 8.O-O | 19 | 15.8% | 55.3% |
| B74 | Sicilian, dragon, classical, 9.Nb3 | 14 | 21.4% | 53.6% |
| B72 | Sicilian, dragon, classical, Amsterdam variation | 4 | 0.0% | 25.0% |
| B72 | Sicilian, dragon, classical, Grigoriev variation | 2 | 50.0% | 75.0% |
| B74 | Sicilian, dragon, classical, Reti-Tartakower variation | 2 | 50.0% | 75.0% |
| B73 | Sicilian, dragon, classical, Richter variation | 3 | 33.3% | 83.3% |
| B83 | Sicilian, modern Scheveningen | 124 | 21.0% | 47.6% |
| B83 | Sicilian, modern Scheveningen, main line | 11 | 27.3% | 68.2% |
| B83 | Sicilian, modern Scheveningen, main line with Nb3 | 1 | 0.0% | 0.0% |
| C00 | St. George defence | 52 | 19.2% | 55.8% |
| C44 | Tayler opening | 1 | 100.0% | 50.0% |
| A06 | Tennison (Lemberg, Zukertort) gambit | 1 | 0.0% | 100.0% |
| C46 | Three knights game | 45 | 17.8% | 53.3% |
| C46 | Three knights, Schlechter variation | 2 | 50.0% | 75.0% |
| C46 | Three knights, Steinitz variation | 43 | 23.3% | 55.8% |
| C46 | Three knights, Steinitz, Rosenthal variation | 1 | 0.0% | 0.0% |
| D03 | Torre attack (Tartakower variation) | 204 | 23.5% | 53.9% |
| A45 | Trompovsky attack (Ruth, Opovcensky opening) | 241 | 15.8% | 52.3% |
| C55 | Two knights defence | 21 | 9.5% | 52.4% |
| C56 | Two knights defence | 15 | 6.7% | 43.3% |
| C57 | Two knights defence | 18 | 16.7% | 30.6% |
| C58 | Two knights defence | 11 | 9.1% | 59.1% |
| C59 | Two knights defence | 50 | 14.0% | 53.0% |
| C55 | Two knights defence (Modern bishop's opening) | 101 | 27.7% | 54.5% |
| C58 | Two knights defence, Bogolyubov variation | 4 | 0.0% | 25.0% |
| C56 | Two knights defence, Canal variation | 3 | 0.0% | 33.3% |
| C58 | Two knights defence, Colman variation | 1 | 0.0% | 100.0% |
| C57 | Two knights defence, Fegatello attack | 5 | 20.0% | 30.0% |
| C57 | Two knights defence, Fegatello attack, Leonhardt variation | 2 | 0.0% | 0.0% |
| C58 | Two knights defence, Kieseritsky variation | 6 | 50.0% | 58.3% |
| C57 | Two knights defence, Lolli attack | 5 | 60.0% | 70.0% |
| C58 | Two knights defence, Paoli variation | 4 | 25.0% | 62.5% |
| C55 | Two knights defence, Perreux variation | 5 | 0.0% | 80.0% |
| C57 | Two knights defence, Pincus variation | 5 | 60.0% | 70.0% |
| C59 | Two knights defence, Steinitz variation | 20 | 30.0% | 60.0% |
| C57 | Two knights defence, Ulvestad variation | 9 | 22.2% | 44.4% |
| C57 | Two knights defence, Wilkes Barre (Traxler) variation | 20 | 15.0% | 57.5% |
| C58 | Two knights defence, Yankovich variation | 2 | 0.0% | 50.0% |
| C55 | Two knights, Max Lange attack | 2 | 0.0% | 0.0% |
| C55 | Two knights, Max Lange attack, Schlechter variation | 3 | 0.0% | 66.7% |
| C55 | Two knights, Max Lange attack, Steinitz variation | 1 | 0.0% | 100.0% |
| C25 | Vienna gambit | 3 | 0.0% | 33.3% |
| C29 | Vienna gambit | 12 | 16.7% | 58.3% |
| C29 | Vienna gambit, Breyer variation | 9 | 0.0% | 66.7% |
| C29 | Vienna gambit, Kaufmann variation | 1 | 0.0% | 100.0% |
| C29 | Vienna gambit, Paulsen attack | 4 | 25.0% | 37.5% |
| C29 | Vienna gambit, Steinitz variation | 1 | 0.0% | 100.0% |
| C25 | Vienna game | 60 | 18.3% | 47.5% |
| C26 | Vienna game | 56 | 14.3% | 50.0% |
| C27 | Vienna game | 27 | 18.5% | 42.6% |
| C28 | Vienna game | 34 | 8.8% | 66.2% |
| C25 | Vienna game, Max Lange defence | 12 | 33.3% | 50.0% |
| C27 | Vienna, Alekhine variation | 5 | 20.0% | 50.0% |
| C26 | Vienna, Falkbeer variation | 5 | 20.0% | 70.0% |
| C26 | Vienna, Mengarini variation | 6 | 16.7% | 91.7% |
| C25 | Vienna, Paulsen variation | 21 | 38.1% | 47.6% |
| C26 | Vienna, Paulsen-Mieses variation | 121 | 28.9% | 52.5% |
| C25 | Vienna, Pierce gambit | 6 | 0.0% | 16.7% |
| C25 | Vienna, Steinitz gambit, Fraser-Minckwitz variation | 3 | 0.0% | 0.0% |
|
Created in 2005-2012 by Kirill Kryukov
Updated on June 16, 2013 |