CCRL 40/40

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.

ECO	Opening	Number of games	Draws	White score
C20	Alapin's opening	7	14.3%	64.3%
B02	Alekhine's defence	29	37.9%	53.4%
B03	Alekhine's defence	6	33.3%	66.7%
B03	Alekhine's defence, Balogh variation	4	0.0%	75.0%
B02	Alekhine's defence, Brooklyn defence	7	14.3%	35.7%
B02	Alekhine's defence, Kmoch variation	2	50.0%	75.0%
B02	Alekhine's defence, Maroczy variation	15	26.7%	60.0%
B03	Alekhine's defence, O'Sullivan gambit	4	50.0%	50.0%
B02	Alekhine's defence, Saemisch attack	8	62.5%	43.8%
B02	Alekhine's defence, Scandinavian variation	34	29.4%	55.9%
B02	Alekhine's defence, Spielmann variation	4	50.0%	25.0%
B02	Alekhine's defence, Two pawns' (Lasker's) attack	31	58.1%	61.3%
B03	Alekhine's defence, exchange variation	93	33.3%	59.7%
B03	Alekhine's defence, exchange, Karpov variation	3	33.3%	83.3%
B03	Alekhine's defence, four pawns attack	11	27.3%	59.1%
B03	Alekhine's defence, four pawns attack, 7.Be3	23	52.2%	73.9%
B03	Alekhine's defence, four pawns attack, Trifunovic variation	5	20.0%	90.0%
B03	Alekhine's defence, four pawns attack, fianchetto variation	4	0.0%	50.0%
B04	Alekhine's defence, modern variation	47	27.7%	64.9%
B05	Alekhine's defence, modern variation, 4...Bg4	169	30.8%	65.7%
B05	Alekhine's defence, modern, Alekhine variation	1	100.0%	50.0%
B05	Alekhine's defence, modern, Flohr variation	13	30.8%	61.5%
B04	Alekhine's defence, modern, Keres variation	21	47.6%	61.9%
B04	Alekhine's defence, modern, Larsen variation	69	34.8%	60.9%
B04	Alekhine's defence, modern, Schmid variation	19	42.1%	57.9%
B04	Alekhine's defence, modern, fianchetto variation	55	20.0%	73.6%
A00	Amar (Paris) opening	10	50.0%	35.0%
A00	Amar gambit	1	0.0%	0.0%
A00	Amsterdam attack	1	0.0%	100.0%
A00	Anderssen's opening	9	44.4%	33.3%
A00	Anti-Borg (Desprez) opening	1	0.0%	0.0%
A40	Beefeater defence	10	30.0%	85.0%
A57	Benko gambit	182	33.5%	60.2%
A59	Benko gambit	17	47.1%	41.2%
A58	Benko gambit accepted	181	38.7%	55.2%
A57	Benko gambit half accepted	244	35.2%	52.0%
A59	Benko gambit, 7.e4	2	50.0%	25.0%
A58	Benko gambit, Nd2 variation	2	50.0%	75.0%
A59	Benko gambit, Ne2 variation	2	0.0%	50.0%
A57	Benko gambit, Zaitsev system	27	29.6%	44.4%
A58	Benko gambit, fianchetto variation	53	39.6%	61.3%
A59	Benko gambit, main line	64	42.2%	61.7%
A00	Benko's opening	837	39.5%	52.4%
A00	Benko's opening, reversed Alekhine	15	40.0%	53.3%
A56	Benoni defence	232	33.2%	59.3%
A60	Benoni defence	24	25.0%	70.8%
A61	Benoni defence	164	22.6%	68.6%
A56	Benoni defence, Hromodka system	215	22.8%	64.9%
A65	Benoni, 6.e4	33	24.2%	48.5%
A61	Benoni, Nimzovich (knight's tour) variation	151	23.2%	63.2%
A67	Benoni, Taimanov variation	25	16.0%	68.0%
A61	Benoni, Uhlmann variation	165	21.2%	37.3%
A78	Benoni, classical with ...Re8 and ...Na6	15	33.3%	56.7%
A75	Benoni, classical with ...a6 and 10...Bg4	28	25.0%	69.6%
A70	Benoni, classical with e4 and Nf3	212	32.5%	55.9%
A70	Benoni, classical without 9.O-O	1	0.0%	0.0%
A72	Benoni, classical without 9.O-O	22	18.2%	77.3%
A79	Benoni, classical, 11.f3	28	32.1%	55.4%
A71	Benoni, classical, 8.Bg5	48	20.8%	52.1%
A76	Benoni, classical, 9...Re8	34	32.4%	57.4%
A77	Benoni, classical, 9...Re8, 10.Nd2	62	29.0%	66.1%
A74	Benoni, classical, 9...a6, 10.a4	3	0.0%	66.7%
A73	Benoni, classical, 9.O-O	26	19.2%	63.5%
A61	Benoni, fianchetto variation	9	11.1%	94.4%
A62	Benoni, fianchetto variation	139	33.8%	57.9%
A64	Benoni, fianchetto, 11...Re8	44	34.1%	42.0%
A63	Benoni, fianchetto, 9...Nbd7	22	36.4%	63.6%
A69	Benoni, four pawns attack, main line	16	56.3%	59.4%
A02	Bird's opening	36	27.8%	58.3%
A03	Bird's opening	16	50.0%	37.5%
A03	Bird's opening, Lasker variation	1	100.0%	50.0%
A02	Bird, From gambit, Lasker variation	1	0.0%	100.0%
C23	Bishop's opening	99	36.4%	55.6%
C24	Bishop's opening, Berlin defence	204	38.2%	54.4%
C23	Bishop's opening, Calabrese counter-gambit, Jaenisch variation	3	0.0%	100.0%
C23	Bishop's opening, Classical variation	29	34.5%	51.7%
C23	Bishop's opening, Lisitsyn variation	1	0.0%	0.0%
C23	Bishop's opening, Philidor counter-attack	29	55.2%	69.0%
C23	Bishop's opening, Philidor variation	9	44.4%	55.6%
C24	Bishop's opening, Urusov gambit	9	22.2%	33.3%
D00	Blackmar gambit	5	80.0%	40.0%
A45	Blackmar-Diemer gambit	28	28.6%	50.0%
E10	Blumenfeld counter-gambit	20	25.0%	52.5%
E10	Blumenfeld counter-gambit accepted	25	20.0%	50.0%
E10	Blumenfeld counter-gambit, Dus-Chotimursky variation	46	34.8%	58.7%
E10	Blumenfeld counter-gambit, Spielmann variation	8	0.0%	50.0%
C27	Boden-Kieseritsky gambit	2	50.0%	75.0%
C27	Boden-Kieseritsky gambit, Lichtenhein defence	4	50.0%	25.0%
E11	Bogo-Indian defence	487	40.0%	55.7%
E11	Bogo-Indian defence, Gruenfeld variation	494	34.8%	54.7%
E11	Bogo-Indian defence, Monticelli trap	8	37.5%	31.3%
E11	Bogo-Indian defence, Nimzovich variation	532	35.7%	56.4%
A52	Budapest defence	13	46.2%	61.5%
A51	Budapest defence declined	2	0.0%	50.0%
A52	Budapest, Adler variation	52	42.3%	50.0%
A52	Budapest, Alekhine variation	2	0.0%	50.0%
A52	Budapest, Alekhine, Abonyi variation	7	42.9%	35.7%
A51	Budapest, Fajarowicz variation	8	0.0%	62.5%
A52	Budapest, Rubinstein variation	139	41.7%	63.3%
A45	Canard opening	11	36.4%	27.3%
B10	Caro-Kann defence	551	31.4%	57.6%
B12	Caro-Kann defence	100	38.0%	56.0%
B15	Caro-Kann defence	71	26.8%	57.0%
B12	Caro-Kann, 3.Nd2	80	36.3%	50.6%
B15	Caro-Kann, Alekhine gambit	3	33.3%	83.3%
B16	Caro-Kann, Bronstein-Larsen variation	69	27.5%	55.8%
B12	Caro-Kann, Edinburgh variation	8	37.5%	43.8%
B15	Caro-Kann, Forgacs variation	72	31.9%	56.3%
B10	Caro-Kann, Goldman (Spielmann) variation	6	16.7%	25.0%
B15	Caro-Kann, Gurgenidze counter-attack	5	40.0%	60.0%
B15	Caro-Kann, Gurgenidze system	126	35.7%	57.5%
B13	Caro-Kann, Panov-Botvinnik attack	195	51.8%	52.1%
B14	Caro-Kann, Panov-Botvinnik attack, 5...e6	698	43.3%	52.9%
B14	Caro-Kann, Panov-Botvinnik attack, 5...g6	83	43.4%	53.0%
B13	Caro-Kann, Panov-Botvinnik, Czerniak variation	8	25.0%	50.0%
B13	Caro-Kann, Panov-Botvinnik, Gunderam attack	3	0.0%	33.3%
B13	Caro-Kann, Panov-Botvinnik, Herzog defence	3	33.3%	50.0%
B13	Caro-Kann, Panov-Botvinnik, Reifir (Spielmann) variation	1	0.0%	100.0%
B13	Caro-Kann, Panov-Botvinnik, normal variation	22	40.9%	61.4%
B15	Caro-Kann, Rasa-Studier gambit	4	50.0%	25.0%
B17	Caro-Kann, Steinitz variation	1239	39.1%	53.1%
B15	Caro-Kann, Tartakower (Nimzovich) variation	39	28.2%	60.3%
B12	Caro-Kann, Tartakower (fantasy) variation	154	39.0%	55.8%
B10	Caro-Kann, Two knights variation	93	38.7%	61.3%
B11	Caro-Kann, Two knights, 3...Bg4	181	32.6%	51.1%
B12	Caro-Kann, advance variation	1707	33.1%	56.0%
B12	Caro-Kann, advance, Short variation	9	44.4%	44.4%
B10	Caro-Kann, anti-Caro-Kann defence	235	30.6%	60.9%
B10	Caro-Kann, anti-anti-Caro-Kann defence	306	42.8%	51.5%
B18	Caro-Kann, classical variation	261	39.1%	53.6%
B18	Caro-Kann, classical, 6.h4	154	34.4%	52.9%
B19	Caro-Kann, classical, 7...Nd7	29	44.8%	50.0%
B18	Caro-Kann, classical, Flohr variation	16	50.0%	50.0%
B18	Caro-Kann, classical, Maroczy attack	6	33.3%	33.3%
B19	Caro-Kann, classical, Spassky variation	1312	37.5%	55.6%
B10	Caro-Kann, closed (Breyer) variation	130	33.8%	50.8%
B13	Caro-Kann, exchange variation	169	42.6%	49.7%
B13	Caro-Kann, exchange, Rubinstein variation	41	39.0%	46.3%
E00	Catalan opening	949	36.8%	54.6%
E01	Catalan, closed	66	34.8%	56.8%
E06	Catalan, closed, 5.Nf3	983	45.6%	53.5%
E07	Catalan, closed, 6...Nbd7	30	40.0%	50.0%
E08	Catalan, closed, 7.Qc2	30	36.7%	58.3%
E07	Catalan, closed, Botvinnik variation	25	44.0%	42.0%
E08	Catalan, closed, Qc2 & b3	86	39.5%	52.3%
E08	Catalan, closed, Spassky gambit	1	0.0%	100.0%
E09	Catalan, closed, main line	75	30.7%	63.3%
E04	Catalan, open, 5.Nf3	1124	41.3%	51.8%
E02	Catalan, open, 5.Qa4	45	42.2%	61.1%
E03	Catalan, open, 5.Qa4 Nbd7, 6.Qxc4	5	100.0%	50.0%
E05	Catalan, open, classical line	42	33.3%	52.4%
C21	Centre game	63	46.0%	70.6%
C22	Centre game	3	33.3%	16.7%
C22	Centre game, Berger variation	77	27.3%	68.2%
C22	Centre game, Paulsen attack	5	20.0%	70.0%
A00	Clemenz (Mead's, Basman's or de Klerk's) opening	2	100.0%	50.0%
D05	Colle system	16	37.5%	56.3%
A56	Czech Benoni defence	63	19.0%	66.7%
A56	Czech Benoni, King's Indian system	14	7.1%	53.6%
C21	Danish gambit	2	50.0%	75.0%
E10	Doery defence	8	25.0%	50.0%
A00	Dunst (Sleipner, Heinrichsen) opening	25	24.0%	56.0%
A00	Durkin's attack	4	50.0%	25.0%
A80	Dutch	469	35.6%	56.2%
A81	Dutch defence	892	36.1%	56.6%
A84	Dutch defence	188	40.4%	56.4%
A90	Dutch defence	273	39.2%	58.8%
A91	Dutch defence	16	37.5%	62.5%
A92	Dutch defence	10	60.0%	70.0%
A92	Dutch defence, Alekhine variation	18	22.2%	66.7%
A81	Dutch defence, Blackburne variation	5	20.0%	30.0%
A90	Dutch defence, Dutch-Indian (Nimzo-Dutch) variation	39	33.3%	62.8%
A84	Dutch defence, Rubinstein variation	87	40.2%	54.6%
A85	Dutch with c4 & Nc3	74	35.1%	55.4%
A86	Dutch with c4 & g3	17	41.2%	61.8%
A80	Dutch, 2.Bg5 variation	103	37.9%	54.9%
A82	Dutch, Balogh defence	1	0.0%	100.0%
A97	Dutch, Ilyin-Genevsky variation	5	20.0%	30.0%
A98	Dutch, Ilyin-Genevsky variation with Qc2	14	35.7%	53.6%
A99	Dutch, Ilyin-Genevsky variation with b3	52	36.5%	66.3%
A97	Dutch, Ilyin-Genevsky, Winter variation	39	41.0%	66.7%
A86	Dutch, Leningrad variation	25	56.0%	60.0%
A81	Dutch, Leningrad, Karlsbad variation	2	100.0%	50.0%
A87	Dutch, Leningrad, main variation	137	43.1%	54.4%
A89	Dutch, Leningrad, main variation with Nc6	180	40.6%	65.8%
A88	Dutch, Leningrad, main variation with c6	282	33.0%	60.1%
A80	Dutch, Manhattan (Alapin, Ulvestad) variation	3	66.7%	66.7%
A82	Dutch, Staunton gambit	2	50.0%	25.0%
A84	Dutch, Staunton gambit deferred	8	75.0%	37.5%
A83	Dutch, Staunton gambit, Alekhine variation	1	0.0%	0.0%
A83	Dutch, Staunton gambit, Chigorin variation	4	25.0%	37.5%
A83	Dutch, Staunton gambit, Lasker variation	1	0.0%	100.0%
A83	Dutch, Staunton gambit, Staunton's line	15	46.7%	56.7%
A82	Dutch, Staunton gambit, Tartakower variation	2	50.0%	25.0%
A96	Dutch, classical variation	61	27.9%	61.5%
A92	Dutch, stonewall variation	37	48.6%	67.6%
A94	Dutch, stonewall with Ba3	24	50.0%	66.7%
A95	Dutch, stonewall with Nc3	37	24.3%	60.8%
A93	Dutch, stonewall, Botwinnik variation	37	24.3%	55.4%
A95	Dutch, stonewall: Chekhover variation	1	100.0%	50.0%
A90	Dutch-Indian, Alekhine variation	16	31.3%	59.4%
E10	Dzindzikhashvili defence	14	71.4%	64.3%
A10	English opening	754	42.8%	54.3%
A13	English opening	711	33.6%	50.1%
A15	English opening	2494	39.1%	53.4%
A16	English opening	334	28.7%	52.4%
A17	English opening	90	45.6%	53.9%
A20	English opening	1721	36.7%	54.5%
A21	English opening	513	31.0%	57.8%
A22	English opening	181	29.3%	51.7%
A13	English opening, Agincourt variation	347	41.8%	52.6%
A15	English, 1...Nf6 (Anglo-Indian defense)	323	36.2%	58.0%
A10	English, Adorjan defence	45	44.4%	53.3%
A10	English, Anglo-Dutch defense	94	31.9%	53.2%
A16	English, Anglo-Gruenfeld defense	51	39.2%	51.0%
A16	English, Anglo-Gruenfeld, Czech defense	46	37.0%	70.7%
A16	English, Anglo-Gruenfeld, Smyslov defense	25	36.0%	66.0%
A22	English, Bellon gambit	6	50.0%	58.3%
A12	English, Bled variation	8	37.5%	68.8%
A26	English, Botvinnik system	108	43.5%	49.5%
A28	English, Bradley Beach variation	27	22.2%	40.7%
A24	English, Bremen system with ...g6	18	50.0%	58.3%
A23	English, Bremen system, Keres variation	66	30.3%	60.6%
A22	English, Bremen, Smyslov system	393	38.2%	47.6%
A22	English, Bremen, reverse dragon	189	40.2%	49.2%
A12	English, Capablanca's variation	32	31.3%	46.9%
A22	English, Carls' Bremen system	72	34.7%	61.8%
A11	English, Caro-Kann defensive system	242	42.1%	57.4%
A12	English, Caro-Kann defensive system	22	40.9%	47.7%
A12	English, Caro-Kann defensive system, Bogolyubov variation	13	46.2%	69.2%
A10	English, Jaenisch gambit	2	0.0%	100.0%
A21	English, Keres variation	6	33.3%	50.0%
A21	English, Kramnik-Shirov counterattack	188	38.3%	50.5%
A13	English, Kurajica defence	13	30.8%	46.2%
A12	English, London defensive system	26	34.6%	40.4%
A18	English, Mikenas-Carls variation	4	50.0%	75.0%
A18	English, Mikenas-Carls, Flohr variation	46	34.8%	60.9%
A18	English, Mikenas-Carls, Kevitz variation	1	100.0%	50.0%
A19	English, Mikenas-Carls, Sicilian variation	52	40.4%	58.7%
A28	English, Nenarokov variation	25	56.0%	68.0%
A13	English, Neo-Catalan	133	47.4%	55.3%
A13	English, Neo-Catalan accepted	278	43.5%	55.9%
A14	English, Neo-Catalan declined	217	35.9%	51.6%
A12	English, New York (London) defensive system	4	50.0%	50.0%
A17	English, Nimzo-English opening	522	39.8%	56.3%
A20	English, Nimzovich variation	31	22.6%	62.9%
A20	English, Nimzovich, Flohr variation	100	45.0%	46.5%
A17	English, Queens Indian formation	67	35.8%	55.2%
A17	English, Queens Indian, Romanishin variation	18	38.9%	63.9%
A13	English, Romanishin gambit	49	46.9%	66.3%
A25	English, Sicilian reversed	173	35.8%	49.1%
A21	English, Smyslov defence	18	27.8%	47.2%
A14	English, Symmetrical, Keres defence	302	44.4%	56.6%
A12	English, Torre defensive system	16	56.3%	46.9%
A21	English, Troeger defence	57	31.6%	47.4%
A13	English, Wimpey system	37	45.9%	50.0%
A25	English, closed system	315	36.5%	55.4%
A26	English, closed system	99	35.4%	58.1%
A25	English, closed system (without ...d6)	65	24.6%	53.8%
A25	English, closed, 5.Rb1	148	44.6%	53.4%
A25	English, closed, 5.Rb1 Taimanov variation	2	0.0%	50.0%
A25	English, closed, Hort variation	4	25.0%	37.5%
A25	English, closed, Taimanov variation	11	18.2%	63.6%
A28	English, four knights system	123	38.2%	47.6%
A28	English, four knights, 4.e3	396	36.4%	52.3%
A28	English, four knights, Capablanca variation	119	38.7%	52.9%
A28	English, four knights, Marini variation	177	36.2%	48.0%
A28	English, four knights, Nimzovich variation	58	29.3%	45.7%
A28	English, four knights, Romanishin variation	163	44.8%	56.1%
A28	English, four knights, Stean variation	45	42.2%	58.9%
A29	English, four knights, kingside fianchetto	2443	37.9%	52.0%
A30	English, symmetrical variation	1438	35.6%	55.1%
A32	English, symmetrical variation	90	38.9%	57.2%
A33	English, symmetrical variation	487	48.5%	56.3%
A34	English, symmetrical variation	427	33.7%	53.9%
A35	English, symmetrical variation	69	26.1%	56.5%
A36	English, symmetrical variation	35	25.7%	67.1%
A37	English, symmetrical variation	197	36.5%	51.8%
A38	English, symmetrical variation	279	44.1%	54.7%
A31	English, symmetrical, Benoni formation	258	39.9%	57.6%
A36	English, symmetrical, Botvinnik system	18	33.3%	61.1%
A36	English, symmetrical, Botvinnik system reversed	22	31.8%	61.4%
A37	English, symmetrical, Botvinnik system reversed	195	30.8%	50.3%
A33	English, symmetrical, Geller variation	271	34.3%	57.7%
A34	English, symmetrical, Rubinstein system	57	26.3%	53.5%
A35	English, symmetrical, four knights system	709	41.6%	51.6%
A30	English, symmetrical, hedgehog system	1200	42.0%	55.6%
A30	English, symmetrical, hedgehog, flexible formation	132	46.2%	54.9%
A38	English, symmetrical, main line with b3	1	100.0%	50.0%
A38	English, symmetrical, main line with d3	47	42.6%	48.9%
A39	English, symmetrical, main line with d4	258	41.5%	57.9%
A34	English, symmetrical, three knights system	357	37.8%	56.4%
A27	English, three knights system	90	26.7%	60.0%
A36	English, ultra-symmetrical variation	454	35.9%	53.6%
C52	Evans gambit	19	36.8%	50.0%
C51	Evans gambit declined	3	0.0%	100.0%
C51	Evans gambit declined, 5.a4	101	35.6%	42.6%
C51	Evans gambit declined, Showalter variation	2	0.0%	50.0%
C51	Evans gambit, 5...Be7	1	0.0%	0.0%
C51	Evans gambit, Cordel variation	9	66.7%	44.4%
C51	Evans gambit, Goering attack	2	0.0%	50.0%
C52	Evans gambit, Lasker defence	5	20.0%	30.0%
C51	Evans gambit, Morphy attack	5	40.0%	20.0%
C51	Evans gambit, Paulsen variation	15	20.0%	70.0%
C52	Evans gambit, Richardson attack	4	50.0%	25.0%
C51	Evans gambit, Stone-Ware variation	5	60.0%	50.0%
C52	Evans gambit, Tartakower attack	1	0.0%	0.0%
C52	Evans gambit, Waller attack	2	0.0%	100.0%
C52	Evans gambit, compromised defence	5	20.0%	70.0%
C52	Evans gambit, compromised defence, Paulsen variation	11	54.5%	54.5%
C51	Evans gambit, normal variation	3	0.0%	33.3%
C49	Four knights	16	56.3%	53.1%
C46	Four knights game	181	48.1%	47.2%
C48	Four knights, Bardeleben variation	1	100.0%	50.0%
C47	Four knights, Belgrade gambit	4	75.0%	62.5%
C49	Four knights, Gunsberg counter-attack	1	100.0%	50.0%
C46	Four knights, Gunsberg variation	14	50.0%	39.3%
C46	Four knights, Italian variation	39	38.5%	50.0%
C49	Four knights, Janowski variation	7	28.6%	57.1%
C49	Four knights, Nimzovich (Paulsen) variation	17	47.1%	64.7%
C48	Four knights, Ranken variation	2	50.0%	75.0%
C48	Four knights, Rubinstein counter-gambit	366	37.4%	56.1%
C48	Four knights, Rubinstein counter-gambit, Bogolyubov variation	2	0.0%	50.0%
C48	Four knights, Rubinstein counter-gambit, Henneberger variation	16	43.8%	40.6%
C48	Four knights, Rubinstein counter-gambit, exchange variation	49	69.4%	57.1%
C46	Four knights, Schultze-Mueller gambit	1	0.0%	100.0%
C47	Four knights, Scotch variation	5	40.0%	60.0%
C47	Four knights, Scotch, 4...exd4	150	48.0%	52.0%
C47	Four knights, Scotch, Krause variation	13	46.2%	61.5%
C48	Four knights, Spanish variation	50	54.0%	57.0%
C48	Four knights, Spanish, classical defence	11	9.1%	40.9%
C48	Four knights, Spielmann variation	1	0.0%	0.0%
C49	Four knights, double Ruy Lopez	15	53.3%	66.7%
C49	Four knights, symmetrical variation	88	36.4%	56.8%
C49	Four knights, symmetrical, Capablanca variation	8	62.5%	56.3%
C49	Four knights, symmetrical, Maroczy system	29	41.4%	51.7%
C49	Four knights, symmetrical, Metger unpin	172	36.0%	54.7%
C49	Four knights, symmetrical, Pillsbury variation	11	45.5%	40.9%
C00	French defence	156	34.6%	57.7%
C11	French defence	82	34.1%	51.2%
C00	French defence, Steiner variation	204	42.6%	51.2%
C00	French, Alapin variation	2	100.0%	50.0%
C13	French, Albin-Alekhine-Chatard attack	15	20.0%	56.7%
C13	French, Albin-Alekhine-Chatard attack, Breyer variation	12	41.7%	54.2%
C13	French, Albin-Alekhine-Chatard attack, Spielmann variation	5	60.0%	70.0%
C13	French, Albin-Alekhine-Chatard attack, Teichmann variation	2	50.0%	75.0%
C11	French, Burn variation	1507	38.4%	55.1%
C00	French, Chigorin variation	276	33.3%	49.6%
C10	French, Fort Knox variation	320	35.6%	52.2%
C10	French, Frere (Becker) variation	7	28.6%	71.4%
C11	French, Henneberger variation	9	33.3%	61.1%
C00	French, King's Indian attack	891	39.5%	51.0%
C00	French, Labourdonnais variation	170	30.6%	42.9%
C12	French, MacCutcheon variation	53	35.8%	50.0%
C12	French, MacCutcheon, Chigorin variation	1	0.0%	0.0%
C12	French, MacCutcheon, Dr. Olland (Dutch) variation	4	0.0%	100.0%
C12	French, MacCutcheon, Grigoriev variation	1	100.0%	50.0%
C12	French, MacCutcheon, Janowski variation	24	37.5%	68.8%
C12	French, MacCutcheon, Lasker variation	103	23.3%	57.3%
C12	French, MacCutcheon, Lasker variation, 8...g6	146	31.5%	56.8%
C12	French, MacCutcheon, advance variation	12	25.0%	20.8%
C10	French, Paulsen variation	299	26.4%	55.4%
C00	French, Pelikan variation	35	34.3%	48.6%
C00	French, Reti (Spielmann) variation	10	40.0%	50.0%
C00	French, Reversed Philidor formation	8	50.0%	62.5%
C10	French, Rubinstein variation	495	47.3%	53.9%
C10	French, Rubinstein, Capablanca line	2	50.0%	75.0%
C00	French, Schlechter variation	88	43.2%	45.5%
C00	French, Steinitz attack	3	0.0%	33.3%
C11	French, Steinitz variation	218	35.3%	58.0%
C11	French, Steinitz, Boleslavsky variation	730	34.4%	55.5%
C11	French, Steinitz, Bradford attack	1	100.0%	50.0%
C11	French, Steinitz, Gledhill attack	1	100.0%	50.0%
C11	French, Swiss variation	33	36.4%	57.6%
C03	French, Tarrasch	531	41.4%	57.6%
C05	French, Tarrasch, Botvinnik variation	17	23.5%	58.8%
C07	French, Tarrasch, Eliskases variation	18	33.3%	44.4%
C04	French, Tarrasch, Guimard main line	80	22.5%	57.5%
C03	French, Tarrasch, Guimard variation	22	22.7%	65.9%
C06	French, Tarrasch, Leningrad variation	10	10.0%	95.0%
C05	French, Tarrasch, closed variation	336	32.1%	57.7%
C06	French, Tarrasch, closed variation, main line	583	36.9%	59.4%
C07	French, Tarrasch, open variation	1132	46.9%	51.3%
C09	French, Tarrasch, open variation, main line	544	45.8%	58.0%
C08	French, Tarrasch, open, 4.ed ed	523	49.5%	54.6%
C00	French, Two knights variation	54	33.3%	53.7%
C15	French, Winawer (Nimzovich) variation	186	38.2%	56.2%
C15	French, Winawer, Alekhine (Maroczy) gambit	44	43.2%	60.2%
C15	French, Winawer, Alekhine gambit, Kan variation	32	56.3%	40.6%
C16	French, Winawer, Petrosian variation	51	35.3%	56.9%
C16	French, Winawer, advance variation	279	35.5%	57.5%
C17	French, Winawer, advance variation	23	39.1%	71.7%
C18	French, Winawer, advance variation	46	23.9%	66.3%
C17	French, Winawer, advance, 5.a3	143	27.3%	60.5%
C19	French, Winawer, advance, 6...Ne7	88	35.2%	58.5%
C17	French, Winawer, advance, Bogolyubov variation	184	31.5%	50.0%
C17	French, Winawer, advance, Russian variation	13	46.2%	38.5%
C19	French, Winawer, advance, Smyslov variation	63	23.8%	64.3%
C19	French, Winawer, advance, poisoned pawn variation	1161	32.0%	60.1%
C19	French, Winawer, advance, poisoned pawn, Euwe-Gligoric variation	2	0.0%	0.0%
C19	French, Winawer, advance, poisoned pawn, Konstantinopolsky variation	184	25.5%	64.4%
C19	French, Winawer, advance, positional main line	567	27.7%	56.2%
C18	French, Winawer, classical variation	82	28.0%	55.5%
C15	French, Winawer, fingerslip variation	10	50.0%	35.0%
C00	French, Wing gambit	4	25.0%	62.5%
C02	French, advance variation	288	25.7%	56.3%
C02	French, advance, Euwe variation	319	34.8%	54.1%
C02	French, advance, Milner-Barry gambit	10	60.0%	50.0%
C02	French, advance, Nimzovich system	16	37.5%	31.3%
C02	French, advance, Paulsen attack	349	35.0%	54.2%
C02	French, advance, Steinitz variation	90	30.0%	37.2%
C02	French, advance, Wade variation	77	31.2%	63.6%
C13	French, classical	7	42.9%	35.7%
C14	French, classical variation	1	100.0%	50.0%
C14	French, classical, Alapin variation	11	54.5%	63.6%
C13	French, classical, Anderssen variation	8	25.0%	37.5%
C13	French, classical, Anderssen-Richter variation	4	25.0%	62.5%
C13	French, classical, Frankfurt variation	7	28.6%	71.4%
C14	French, classical, Pollock variation	4	25.0%	62.5%
C14	French, classical, Rubinstein variation	8	62.5%	56.3%
C14	French, classical, Stahlberg variation	1	100.0%	50.0%
C14	French, classical, Steinitz variation	167	31.7%	58.4%
C14	French, classical, Tarrasch variation	2	0.0%	50.0%
C13	French, classical, Tartakower variation	3	33.3%	83.3%
C13	French, classical, Vistaneckis (Nimzovich) variation	9	0.0%	66.7%
C01	French, exchange variation	512	38.1%	54.6%
C01	French, exchange, Svenonius variation	8	50.0%	37.5%
C50	Giuoco Pianissimo	373	36.7%	51.1%
C50	Giuoco Pianissimo, Canal variation	99	47.5%	54.0%
C50	Giuoco Pianissimo, Italian four knights variation	139	40.3%	52.5%
C50	Giuoco Piano	51	41.2%	50.0%
C53	Giuoco Piano	846	36.5%	55.4%
C54	Giuoco Piano	41	48.8%	51.2%
C53	Giuoco Piano, Anderssen variation	3	33.3%	50.0%
C53	Giuoco Piano, Bird's attack	62	27.4%	50.8%
C53	Giuoco Piano, LaBourdonnais variation	3	0.0%	66.7%
C53	Giuoco Piano, Mestel variation	1	100.0%	50.0%
C54	Giuoco Piano, Moeller (Therkatz) attack	13	46.2%	23.1%
C54	Giuoco Piano, Moeller, bayonet attack	1	0.0%	100.0%
C53	Giuoco Piano, centre-holding variation	5	60.0%	50.0%
C53	Giuoco Piano, close variation	2	0.0%	100.0%
C50	Giuoco Piano, four knights variation	11	18.2%	45.5%
C55	Giuoco piano	2	0.0%	50.0%
A00	Grob's attack	3	33.3%	50.0%
D80	Gruenfeld defence	33	36.4%	63.6%
D99	Gruenfeld defence, Smyslov, Yugoslav variation	10	30.0%	45.0%
D99	Gruenfeld defence, Smyslov, main line	103	44.7%	56.3%
D93	Gruenfeld with Bf4 e3	95	49.5%	56.3%
D94	Gruenfeld with e3 Bd3	11	45.5%	59.1%
D95	Gruenfeld with e3 & Qb3	4	50.0%	75.0%
D82	Gruenfeld, 4.Bf4	193	39.9%	55.7%
D92	Gruenfeld, 5.Bf4	227	48.0%	56.2%
D91	Gruenfeld, 5.Bg5	459	35.9%	48.7%
D94	Gruenfeld, 5.e3	163	44.2%	59.5%
D95	Gruenfeld, Botvinnik variation	11	36.4%	45.5%
D94	Gruenfeld, Flohr defence	12	25.0%	62.5%
D90	Gruenfeld, Flohr variation	19	15.8%	60.5%
D83	Gruenfeld, Gruenfeld gambit	9	44.4%	66.7%
D84	Gruenfeld, Gruenfeld gambit accepted	15	53.3%	53.3%
D83	Gruenfeld, Gruenfeld gambit, Botvinnik variation	9	77.8%	61.1%
D83	Gruenfeld, Gruenfeld gambit, Capablanca variation	26	42.3%	63.5%
D94	Gruenfeld, Makogonov variation	37	45.9%	44.6%
D94	Gruenfeld, Opovcensky variation	41	46.3%	54.9%
D81	Gruenfeld, Russian variation	12	58.3%	62.5%
D96	Gruenfeld, Russian variation	44	38.6%	62.5%
D97	Gruenfeld, Russian variation with e4	6	33.3%	66.7%
D97	Gruenfeld, Russian, Alekhine (Hungarian) variation	635	41.7%	50.8%
D97	Gruenfeld, Russian, Byrne (Simagin) variation	45	28.9%	61.1%
D98	Gruenfeld, Russian, Keres variation	3	0.0%	100.0%
D97	Gruenfeld, Russian, Prins variation	260	40.0%	56.2%
D98	Gruenfeld, Russian, Smyslov variation	128	43.8%	58.6%
D97	Gruenfeld, Russian, Szabo (Boleslavsky) variation	71	35.2%	54.2%
D90	Gruenfeld, Schlechter variation	8	37.5%	43.8%
D94	Gruenfeld, Smyslov defence	67	55.2%	56.0%
D88	Gruenfeld, Spassky variation, main line, 10...cd, 11.cd	53	37.7%	62.3%
D89	Gruenfeld, Spassky variation, main line, 13.Bd3	62	33.9%	49.2%
D80	Gruenfeld, Stockholm variation	131	39.7%	58.8%
D90	Gruenfeld, Three knights variation	90	42.2%	52.2%
D85	Gruenfeld, exchange variation	384	43.2%	53.4%
D87	Gruenfeld, exchange, Seville variation	63	55.6%	61.1%
D86	Gruenfeld, exchange, Simagin's improved variation	33	33.3%	47.0%
D86	Gruenfeld, exchange, Simagin's lesser variation	3	0.0%	33.3%
D89	Gruenfeld, exchange, Sokolsky variation	8	50.0%	25.0%
D87	Gruenfeld, exchange, Spassky variation	155	38.1%	54.5%
D86	Gruenfeld, exchange, classical variation	245	44.9%	56.7%
D85	Gruenfeld, modern exchange variation	1510	48.1%	54.4%
C40	Gunderam defence	38	28.9%	64.5%
A43	Hawk (Habichd) defence	1	0.0%	0.0%
C50	Hungarian defence	55	23.6%	50.0%
C44	Inverted Hanham	13	23.1%	42.3%
C36	KGA, Abbazia defence (classical defence, modern defence[!])	5	0.0%	100.0%
C36	KGA, Abbazia defence, modern variation	10	30.0%	55.0%
C39	KGA, Allgaier, Walker attack	1	0.0%	0.0%
C34	KGA, Becker defence	3	33.3%	83.3%
C37	KGA, Blachly gambit	1	0.0%	0.0%
C34	KGA, Bonsch-Osmolovsky variation	2	0.0%	50.0%
C35	KGA, Cunningham defence	6	16.7%	41.7%
C35	KGA, Cunningham, Euwe defence	5	20.0%	50.0%
C34	KGA, Fischer defence	12	25.0%	54.2%
C38	KGA, Hanstein gambit	1	0.0%	0.0%
C33	KGA, Keres (Mason-Steinitz) gambit	2	0.0%	0.0%
C39	KGA, Kieseritsky, Berlin defence	7	28.6%	28.6%
C39	KGA, Kieseritsky, Berlin defence, 6.Bc4	7	14.3%	7.1%
C39	KGA, Kieseritsky, Kolisch defence	9	55.6%	61.1%
C39	KGA, Kieseritsky, Neumann defence	2	0.0%	100.0%
C39	KGA, Kieseritsky, Paulsen defence	2	0.0%	50.0%
C39	KGA, Kieseritsky, Rice gambit	10	20.0%	40.0%
C39	KGA, Kieseritsky, long whip (Stockwhip, classical) defence	1	0.0%	0.0%
C37	KGA, Muzio gambit	1	100.0%	50.0%
C37	KGA, Muzio gambit, Brentano defence	1	100.0%	50.0%
C37	KGA, Muzio gambit, From defence	1	100.0%	50.0%
C34	KGA, Schallop defence	8	25.0%	75.0%
C33	KGA, bishop's gambit	7	57.1%	42.9%
C33	KGA, bishop's gambit, Bledow variation	2	50.0%	75.0%
C33	KGA, bishop's gambit, Bogolyubov variation	1	0.0%	0.0%
C33	KGA, bishop's gambit, Cozio (Morphy) defence	2	100.0%	50.0%
C33	KGA, bishop's gambit, Gifford variation	3	33.3%	50.0%
C33	KGA, bishop's gambit, Jaenisch variation	17	29.4%	55.9%
C33	KGA, bishop's gambit, McDonnell attack	1	0.0%	100.0%
C33	KGA, bishop's gambit, Steinitz defence	6	33.3%	50.0%
C33	KGA, bishop's gambit, classical defence	1	0.0%	0.0%
C30	KGD, 2...Nf6	2	50.0%	25.0%
C32	KGD, Falkbeer, Keres variation	1	0.0%	100.0%
C31	KGD, Falkbeer, Rubinstein variation	1	0.0%	100.0%
C30	KGD, Keene's defence	3	33.3%	83.3%
C31	KGD, Nimzovich counter-gambit	5	80.0%	60.0%
C30	KGD, classical variation	19	26.3%	65.8%
C30	KGD, classical, 4.c3	4	25.0%	62.5%
C30	KGD, classical, Reti variation	1	100.0%	50.0%
C30	KGD, classical, Svenonius variation	1	100.0%	50.0%
B00	KP, Colorado counter	2	0.0%	50.0%
C20	KP, King's head opening	1	100.0%	50.0%
C20	KP, Lopez opening	2	50.0%	25.0%
B00	KP, Nimzovich defence	82	35.4%	61.6%
B00	KP, Nimzovich defence, Bogolyubov variation	8	12.5%	68.8%
A50	Kevitz-Trajkovich defence	67	40.3%	45.5%
E60	King's Indian defence	150	35.3%	54.3%
E61	King's Indian defence, 3.Nc3	261	35.6%	58.0%
E72	King's Indian with e4 & g3	11	45.5%	59.1%
E60	King's Indian, 3.Nf3	1234	37.8%	57.2%
E60	King's Indian, 3.g3	301	37.9%	52.2%
E60	King's Indian, 3.g3, counterthrust variation	3	0.0%	33.3%
E70	King's Indian, 4.e4	243	25.5%	60.5%
E73	King's Indian, 5.Be2	11	54.5%	54.5%
E90	King's Indian, 5.Nf3	233	32.2%	56.4%
E91	King's Indian, 6.Be2	248	32.7%	65.5%
E92	King's Indian, Andersson variation	109	45.9%	48.6%
E60	King's Indian, Anti-Gruenfeld	3	33.3%	50.0%
E73	King's Indian, Averbakh system	283	27.6%	53.7%
E74	King's Indian, Averbakh, 6...c5	39	35.9%	53.8%
E75	King's Indian, Averbakh, main line	26	11.5%	51.9%
A48	King's Indian, East Indian defence	323	34.1%	50.8%
E76	King's Indian, Four pawns attack	68	36.8%	59.6%
E77	King's Indian, Four pawns attack	42	19.0%	61.9%
E77	King's Indian, Four pawns attack, 6.Be2	1	0.0%	0.0%
E77	King's Indian, Four pawns attack, Florentine gambit	2	100.0%	50.0%
E76	King's Indian, Four pawns attack, dynamic line	37	32.4%	56.8%
E79	King's Indian, Four pawns attack, main line	7	14.3%	50.0%
E92	King's Indian, Gligoric-Taimanov system	547	30.5%	57.7%
E91	King's Indian, Kazakh variation	140	35.0%	56.1%
E70	King's Indian, Kramer system	114	21.9%	57.5%
E90	King's Indian, Larsen variation	39	41.0%	51.3%
A48	King's Indian, London system	166	41.0%	47.6%
E71	King's Indian, Makagonov system (5.h3)	175	26.9%	63.1%
E92	King's Indian, Petrosian system	36	13.9%	54.2%
E92	King's Indian, Petrosian system, Stein variation	294	31.0%	53.9%
E93	King's Indian, Petrosian system, main line	40	40.0%	55.0%
E72	King's Indian, Pomar system	4	50.0%	50.0%
E80	King's Indian, Saemisch variation	78	33.3%	61.5%
E81	King's Indian, Saemisch, 5...O-O	584	34.6%	53.4%
E83	King's Indian, Saemisch, 6...Nc6	20	30.0%	55.0%
E81	King's Indian, Saemisch, Byrne variation	36	47.2%	51.4%
E83	King's Indian, Saemisch, Panno formation	21	38.1%	47.6%
E84	King's Indian, Saemisch, Panno main line	157	35.7%	51.6%
E83	King's Indian, Saemisch, Ruban variation	4	25.0%	62.5%
E82	King's Indian, Saemisch, double fianchetto variation	28	28.6%	57.1%
E89	King's Indian, Saemisch, orthodox main line	14	42.9%	50.0%
E85	King's Indian, Saemisch, orthodox variation	4	25.0%	37.5%
E86	King's Indian, Saemisch, orthodox, 7.Nge2 c6	140	29.3%	51.1%
E87	King's Indian, Saemisch, orthodox, 7.d5	81	27.2%	56.8%
E88	King's Indian, Saemisch, orthodox, 7.d5 c6	141	31.9%	53.5%
E87	King's Indian, Saemisch, orthodox, Bronstein variation	2	50.0%	25.0%
E73	King's Indian, Semi-Averbakh system	10	30.0%	55.0%
E77	King's Indian, Six pawns attack	2	0.0%	0.0%
E61	King's Indian, Smyslov system	30	36.7%	41.7%
A48	King's Indian, Torre attack	424	37.5%	51.3%
E90	King's Indian, Zinnowitz variation	17	29.4%	55.9%
E70	King's Indian, accelerated Averbakh system	35	25.7%	55.7%
E92	King's Indian, classical variation	11	36.4%	54.5%
E62	King's Indian, fianchetto variation	27	29.6%	59.3%
E62	King's Indian, fianchetto with ...Nc6	60	38.3%	59.2%
E67	King's Indian, fianchetto with ...Nd7	42	38.1%	52.4%
A49	King's Indian, fianchetto without c4	387	38.2%	57.4%
E62	King's Indian, fianchetto, Kavalek (Bronstein) variation	312	33.0%	60.4%
E62	King's Indian, fianchetto, Larsen system	147	38.1%	61.2%
E63	King's Indian, fianchetto, Panno variation	1259	35.8%	57.7%
E62	King's Indian, fianchetto, Simagin variation	48	39.6%	61.5%
E62	King's Indian, fianchetto, Uhlmann (Szabo) variation	135	30.4%	60.4%
E66	King's Indian, fianchetto, Yugoslav Panno	116	32.8%	56.0%
E64	King's Indian, fianchetto, Yugoslav system	42	28.6%	64.3%
E65	King's Indian, fianchetto, Yugoslav, 7.O-O	53	54.7%	51.9%
E69	King's Indian, fianchetto, classical main line	341	31.4%	61.7%
E67	King's Indian, fianchetto, classical variation	198	35.4%	57.6%
E68	King's Indian, fianchetto, classical variation, 8.e4	696	37.2%	59.1%
E62	King's Indian, fianchetto, lesser Simagin (Spassky) variation	78	43.6%	56.4%
E94	King's Indian, orthodox variation	415	37.6%	55.4%
E94	King's Indian, orthodox, 7...Nbd7	472	35.6%	60.4%
E95	King's Indian, orthodox, 7...Nbd7, 8.Re1	195	36.4%	55.6%
E96	King's Indian, orthodox, 7...Nbd7, main line	37	37.8%	56.8%
E97	King's Indian, orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)	2023	33.1%	55.0%
E98	King's Indian, orthodox, Aronin-Taimanov, 9.Ne1	659	25.0%	60.9%
E99	King's Indian, orthodox, Aronin-Taimanov, Benko attack	18	16.7%	63.9%
E97	King's Indian, orthodox, Aronin-Taimanov, bayonet attack	935	33.7%	59.2%
E99	King's Indian, orthodox, Aronin-Taimanov, main line	12	16.7%	58.3%
E94	King's Indian, orthodox, Donner variation	42	28.6%	57.1%
C30	King's gambit	4	0.0%	100.0%
C34	King's knight's gambit	1	100.0%	50.0%
C38	King's knight's gambit	4	0.0%	0.0%
C20	King's pawn game	2	0.0%	50.0%
C44	King's pawn game	3	33.3%	50.0%
C50	King's pawn game	134	33.6%	58.6%
B00	King's pawn opening	318	36.2%	57.4%
C40	Latvian, Fraser defence	1	100.0%	50.0%
C40	Latvian, Polerio variation	4	75.0%	62.5%
B00	Lemming defence	2	50.0%	25.0%
C00	Lengfellner system	1	0.0%	100.0%
D00	Levitsky attack (Queen's bishop attack)	269	35.3%	48.5%
A00	Mieses opening	7	85.7%	57.1%
A40	Modern defence	228	36.8%	61.8%
A41	Modern defence	12	25.0%	54.2%
A42	Modern defence, Averbakh system	82	32.9%	67.7%
A42	Modern defence, Averbakh system, Kotov variation	18	33.3%	66.7%
A42	Modern defence, Averbakh system, Randspringer variation	2	0.0%	100.0%
D70	Neo-Gruenfeld (Kemeri) defence	9	22.2%	55.6%
D70	Neo-Gruenfeld defence	26	38.5%	46.2%
D73	Neo-Gruenfeld, 5.Nf3	202	51.5%	55.0%
D71	Neo-Gruenfeld, 5.cd	61	45.9%	55.7%
D72	Neo-Gruenfeld, 5.cd, main line	55	29.1%	60.0%
D77	Neo-Gruenfeld, 6.O-O	253	47.4%	56.1%
D78	Neo-Gruenfeld, 6.O-O c6	387	40.8%	55.3%
D79	Neo-Gruenfeld, 6.O-O, main line	155	46.5%	50.3%
D74	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O	45	37.8%	54.4%
D76	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb6	223	39.5%	55.6%
D75	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3	25	40.0%	56.0%
D75	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.dc	5	40.0%	60.0%
E00	Neo-Indian (Seirawan) attack	114	28.9%	50.4%
E20	Nimzo-Indian defence	16	25.0%	43.8%
E40	Nimzo-Indian, 4.e3	67	29.9%	55.2%
E46	Nimzo-Indian, 4.e3 O-O	31	22.6%	56.5%
E47	Nimzo-Indian, 4.e3 O-O, 5.Bd3	119	51.3%	56.7%
E48	Nimzo-Indian, 4.e3 O-O, 5.Bd3 d5	147	42.2%	47.6%
E41	Nimzo-Indian, 4.e3 c5	306	37.3%	53.9%
E42	Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein)	284	41.5%	50.4%
E51	Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d5	32	46.9%	57.8%
E50	Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d5	35	40.0%	54.3%
E49	Nimzo-Indian, 4.e3, Botvinnik system	76	43.4%	62.5%
E45	Nimzo-Indian, 4.e3, Bronstein (Byrne) variation	84	46.4%	58.9%
E53	Nimzo-Indian, 4.e3, Gligoric system with 7...Nbd7	19	52.6%	42.1%
E54	Nimzo-Indian, 4.e3, Gligoric system with 7...dc	352	46.0%	56.5%
E55	Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation	1207	46.8%	54.3%
E54	Nimzo-Indian, 4.e3, Gligoric system, Smyslov variation	18	61.1%	58.3%
E53	Nimzo-Indian, 4.e3, Keres variation	35	37.1%	52.9%
E51	Nimzo-Indian, 4.e3, Ragozin variation	4	75.0%	62.5%
E40	Nimzo-Indian, 4.e3, Taimanov variation	20	35.0%	57.5%
E59	Nimzo-Indian, 4.e3, main line	632	41.6%	52.9%
E52	Nimzo-Indian, 4.e3, main line with ...b6	139	42.4%	57.2%
E53	Nimzo-Indian, 4.e3, main line with ...c5	129	37.2%	59.7%
E56	Nimzo-Indian, 4.e3, main line with 7...Nc6	74	48.6%	55.4%
E58	Nimzo-Indian, 4.e3, main line with 8...Bxc3	583	35.7%	53.3%
E57	Nimzo-Indian, 4.e3, main line with 8...dc and 9...cd	5	60.0%	30.0%
E43	Nimzo-Indian, Fischer variation	270	38.9%	53.1%
E44	Nimzo-Indian, Fischer variation, 5.Ne2	113	36.3%	56.2%
E20	Nimzo-Indian, Kmoch variation	132	40.2%	59.5%
E30	Nimzo-Indian, Leningrad variation	205	35.6%	50.0%
E30	Nimzo-Indian, Leningrad, ...b5 gambit	32	31.3%	43.8%
E31	Nimzo-Indian, Leningrad, main line	62	30.6%	55.6%
E46	Nimzo-Indian, Reshevsky variation	144	38.9%	48.6%
E20	Nimzo-Indian, Romanishin-Kasparov (Steiner) system	187	41.7%	51.3%
E24	Nimzo-Indian, Saemisch variation	27	51.9%	33.3%
E25	Nimzo-Indian, Saemisch variation	26	61.5%	53.8%
E26	Nimzo-Indian, Saemisch variation	21	28.6%	38.1%
E27	Nimzo-Indian, Saemisch variation	5	60.0%	30.0%
E28	Nimzo-Indian, Saemisch variation	17	17.6%	55.9%
E24	Nimzo-Indian, Saemisch, Botvinnik variation	4	0.0%	0.0%
E29	Nimzo-Indian, Saemisch, Capablanca variation	13	30.8%	30.8%
E25	Nimzo-Indian, Saemisch, Keres variation	95	44.2%	51.6%
E26	Nimzo-Indian, Saemisch, O'Kelly variation	11	27.3%	40.9%
E25	Nimzo-Indian, Saemisch, Romanovsky variation	6	66.7%	33.3%
E29	Nimzo-Indian, Saemisch, main line	36	36.1%	56.9%
E46	Nimzo-Indian, Simagin variation	23	26.1%	56.5%
E22	Nimzo-Indian, Spielmann variation	19	63.2%	52.6%
E23	Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc6	16	43.8%	59.4%
E23	Nimzo-Indian, Spielmann, Karlsbad variation	8	50.0%	50.0%
E23	Nimzo-Indian, Spielmann, San Remo variation	2	50.0%	75.0%
E32	Nimzo-Indian, classical variation	2412	39.7%	53.9%
E33	Nimzo-Indian, classical, 4...Nc6	21	61.9%	50.0%
E38	Nimzo-Indian, classical, 4...c5	154	40.3%	64.9%
E32	Nimzo-Indian, classical, Adorjan gambit	54	35.2%	50.9%
E36	Nimzo-Indian, classical, Botvinnik variation	3	0.0%	66.7%
E33	Nimzo-Indian, classical, Milner-Barry (Zurich) variation	108	38.9%	54.6%
E34	Nimzo-Indian, classical, Noa variation	246	51.6%	52.2%
E36	Nimzo-Indian, classical, Noa variation, 5.a3	26	23.1%	50.0%
E35	Nimzo-Indian, classical, Noa variation, 5.cd ed	115	40.0%	54.8%
E37	Nimzo-Indian, classical, Noa variation, main line, 7.Qc2	40	37.5%	76.3%
E39	Nimzo-Indian, classical, Pirc variation	268	39.9%	55.0%
E41	Nimzo-Indian, e3, Huebner variation	191	35.6%	47.6%
E21	Nimzo-Indian, three knights variation	625	39.8%	52.1%
E21	Nimzo-Indian, three knights, Korchnoi variation	2	0.0%	50.0%
A01	Nimzovich-Larsen attack	33	21.2%	47.0%
A01	Nimzovich-Larsen attack, Dutch variation	8	0.0%	75.0%
A01	Nimzovich-Larsen attack, English variation	21	33.3%	54.8%
A01	Nimzovich-Larsen attack, Indian variation	49	22.4%	50.0%
A01	Nimzovich-Larsen attack, classical variation	69	43.5%	50.7%
A01	Nimzovich-Larsen attack, modern variation	137	34.3%	53.6%
A01	Nimzovich-Larsen attack, symmetrical variation	3	0.0%	33.3%
A00	Novosibirsk opening	6	33.3%	66.7%
A43	Old Benoni defence	404	31.7%	59.4%
A44	Old Benoni defence	6	66.7%	66.7%
A43	Old Benoni, Franco-Benoni defence	14	42.9%	57.1%
A43	Old Benoni, Mujannah formation	4	25.0%	87.5%
A43	Old Benoni, Schmid's system	6	0.0%	16.7%
A41	Old Indian defence	165	24.2%	57.6%
A53	Old Indian defence	305	36.7%	56.7%
A53	Old Indian, Janowski variation	23	26.1%	60.9%
A41	Old Indian, Tartakower (Wade) variation	333	32.1%	60.2%
A54	Old Indian, Ukrainian variation	20	55.0%	67.5%
A54	Old Indian, Ukrainian variation, 4.Nf3	62	40.3%	62.1%
A55	Old Indian, main line	162	43.8%	60.8%
B00	Owen defence	61	37.7%	59.8%
C42	Petrov three knights game	71	23.9%	62.7%
C42	Petrov's defence	113	42.5%	51.3%
C42	Petrov, Cochrane gambit	7	42.9%	35.7%
C42	Petrov, Cozio (Lasker) attack	152	44.1%	56.9%
C42	Petrov, Damiano variation	1	0.0%	100.0%
C42	Petrov, French attack	2	50.0%	75.0%
C42	Petrov, Italian variation	39	28.2%	55.1%
C42	Petrov, Kaufmann attack	67	43.3%	42.5%
C42	Petrov, Nimzovich attack	101	40.6%	60.9%
C42	Petrov, Paulsen attack	44	29.5%	51.1%
C43	Petrov, Urusov gambit	4	75.0%	62.5%
C42	Petrov, classical attack	155	45.2%	54.2%
C42	Petrov, classical attack, Berger variation	7	57.1%	71.4%
C42	Petrov, classical attack, Chigorin variation	233	35.6%	56.4%
C42	Petrov, classical attack, Jaenisch variation	841	43.3%	59.3%
C42	Petrov, classical attack, Krause variation	1	0.0%	100.0%
C42	Petrov, classical attack, Marshall variation	493	38.3%	56.9%
C42	Petrov, classical attack, Mason variation	27	33.3%	57.4%
C42	Petrov, classical attack, Tarrasch variation	1	0.0%	100.0%
C42	Petrov, classical attack, close variation	51	35.3%	64.7%
C43	Petrov, modern (Steinitz) attack	22	50.0%	61.4%
C43	Petrov, modern attack, Steinitz variation	1	100.0%	50.0%
C43	Petrov, modern attack, Symmetrical variation	598	40.5%	50.8%
C43	Petrov, modern attack, Trifunovic variation	28	46.4%	48.2%
C43	Petrov, modern attack, main line	97	41.2%	59.8%
C41	Philidor's defence	49	36.7%	55.1%
C41	Philidor, Hanham variation	5	60.0%	70.0%
C41	Philidor, Hanham, Delmar variation	2	100.0%	50.0%
C41	Philidor, Hanham, Krause variation	5	40.0%	40.0%
C41	Philidor, Hanham, Schlechter variation	14	21.4%	60.7%
C41	Philidor, Hanham, Steiner variation	9	44.4%	44.4%
C41	Philidor, Improved Hanham variation	201	37.8%	57.2%
C41	Philidor, Larsen variation	10	40.0%	50.0%
C41	Philidor, Nimzovich (Jaenisch) variation	2	50.0%	25.0%
C41	Philidor, Nimzovich, Klein variation	1	100.0%	50.0%
C41	Philidor, Nimzovich, Rellstab variation	14	50.0%	67.9%
C41	Philidor, Nimzovich, Sokolsky variation	3	66.7%	66.7%
C41	Philidor, Nimzovich, Sozin variation	3	66.7%	33.3%
C41	Philidor, Philidor counter-gambit	1	100.0%	50.0%
C41	Philidor, Philidor counter-gambit, Zukertort variation	4	25.0%	87.5%
C41	Philidor, Philidor counter-gambit, del Rio attack	1	0.0%	100.0%
C41	Philidor, Steinitz variation	3	33.3%	16.7%
C41	Philidor, exchange variation	76	34.2%	51.3%
B07	Pirc defence	266	36.1%	56.8%
B07	Pirc, 150 attack	86	40.7%	58.7%
B09	Pirc, Austrian attack	59	40.7%	61.0%
B09	Pirc, Austrian attack, 6.Bd3	376	37.5%	61.6%
B09	Pirc, Austrian attack, 6.Be3	77	32.5%	57.8%
B09	Pirc, Austrian attack, 6.e5	29	41.4%	58.6%
B09	Pirc, Austrian attack, Ljubojevic variation	5	20.0%	70.0%
B09	Pirc, Austrian attack, dragon formation	166	44.0%	59.3%
B07	Pirc, Byrne variation	99	31.3%	61.1%
B07	Pirc, Holmov system	28	71.4%	57.1%
B07	Pirc, Sveshnikov system	74	28.4%	50.7%
B07	Pirc, Ufimtsev-Pytel variation	120	30.8%	60.4%
B07	Pirc, bayonet (Mariotti) attack	9	55.6%	61.1%
B08	Pirc, classical (two knights) system	157	34.4%	62.4%
B08	Pirc, classical system, 5.Be2	724	37.8%	57.5%
B08	Pirc, classical, h3 system	121	34.7%	53.7%
A00	Polish (Sokolsky) opening	49	34.7%	39.8%
A40	Polish defence	20	50.0%	45.0%
A00	Polish, Outflank variation	9	22.2%	77.8%
C44	Ponziani counter-gambit	6	50.0%	41.7%
C44	Ponziani counter-gambit, Cordel variation	1	0.0%	0.0%
C44	Ponziani opening	10	40.0%	70.0%
C44	Ponziani, Caro variation	2	0.0%	0.0%
C44	Ponziani, Jaenisch counter-attack	63	34.9%	52.4%
C44	Ponziani, Steinitz variation	2	0.0%	100.0%
A42	Pterodactyl defence	311	35.4%	65.0%
D21	QGA, 3.Nf3	113	40.7%	57.5%
D20	QGA, 3.e4	596	38.3%	59.2%
D26	QGA, 4...e6	120	46.7%	53.3%
D24	QGA, 4.Nc3	78	37.2%	51.9%
D25	QGA, 4.e3	21	47.6%	52.4%
D22	QGA, Alekhine defence	45	46.7%	58.9%
D22	QGA, Alekhine defence, Alatortsev variation	3	33.3%	16.7%
D21	QGA, Alekhine defense, Borisenko-Furman variation	6	50.0%	41.7%
D24	QGA, Bogolyubov variation	31	64.5%	54.8%
D21	QGA, Ericson variation	2	0.0%	0.0%
D25	QGA, Flohr variation	20	35.0%	62.5%
D22	QGA, Haberditz variation	5	80.0%	40.0%
D25	QGA, Janowsky-Larsen variation	138	39.1%	59.4%
D20	QGA, Linares variation	26	34.6%	59.6%
D23	QGA, Mannheim variation	51	31.4%	51.0%
D25	QGA, Smyslov variation	31	54.8%	62.9%
D26	QGA, classical variation	365	50.4%	51.2%
D26	QGA, classical variation, 6.O-O	42	50.0%	60.7%
D27	QGA, classical, 6...a6	1060	46.6%	53.7%
D28	QGA, classical, 7...b5	43	34.9%	64.0%
D28	QGA, classical, 7.Qe2	29	41.4%	58.6%
D29	QGA, classical, 8...Bb7	149	38.3%	44.0%
D26	QGA, classical, Furman variation	1	0.0%	0.0%
D27	QGA, classical, Geller variation	41	48.8%	48.8%
D27	QGA, classical, Rubinstein variation	835	45.1%	55.4%
D29	QGA, classical, Smyslov variation	18	38.9%	47.2%
D26	QGA, classical, Steinitz variation	10	40.0%	70.0%
D30	QGD	148	41.9%	55.4%
D51	QGD	1	100.0%	50.0%
D52	QGD	14	42.9%	57.1%
D30	QGD Slav	57	52.6%	59.6%
D15	QGD Slav accepted	25	36.0%	42.0%
D16	QGD Slav accepted, Alapin variation	41	24.4%	68.3%
D10	QGD Slav defence	893	34.8%	52.7%
D10	QGD Slav defence, Alekhine variation	22	31.8%	61.4%
D10	QGD Slav defence, exchange variation	391	41.2%	54.9%
D11	QGD Slav, 3.Nf3	491	39.1%	55.0%
D15	QGD Slav, 4.Nc3	675	35.9%	52.3%
D11	QGD Slav, 4.e3	397	35.8%	54.9%
D12	QGD Slav, 4.e3 Bf5	747	38.7%	52.8%
D15	QGD Slav, 5.e3 (Alekhine variation)	48	33.3%	47.9%
D12	QGD Slav, Amsterdam variation	10	50.0%	55.0%
D11	QGD Slav, Breyer variation	27	33.3%	64.8%
D17	QGD Slav, Carlsbad variation	208	40.4%	57.2%
D17	QGD Slav, Czech defence	99	43.4%	49.0%
D18	QGD Slav, Dutch variation	54	37.0%	55.6%
D19	QGD Slav, Dutch variation	624	37.2%	57.9%
D19	QGD Slav, Dutch variation, main line	98	40.8%	58.2%
D17	QGD Slav, Krause attack	181	35.9%	57.2%
D15	QGD Slav, Schlechter variation	88	43.2%	61.4%
D30	QGD Slav, Semmering variation	4	75.0%	62.5%
D15	QGD Slav, Slav gambit	2	0.0%	50.0%
D16	QGD Slav, Smyslov variation	28	35.7%	53.6%
D16	QGD Slav, Soultanbeieff variation	12	41.7%	62.5%
D16	QGD Slav, Steiner variation	54	35.2%	69.4%
D15	QGD Slav, Suechting variation	17	35.3%	64.7%
D15	QGD Slav, Tolush-Geller gambit	19	42.1%	42.1%
D17	QGD Slav, Wiesbaden variation	247	42.1%	57.1%
D10	QGD Slav, Winawer counter-gambit	47	21.3%	48.9%
D12	QGD Slav, exchange variation	27	25.9%	46.3%
D13	QGD Slav, exchange variation	272	41.9%	57.0%
D14	QGD Slav, exchange variation, 6.Bf4 Bf5	242	44.2%	50.2%
D14	QGD Slav, exchange, Trifunovic variation	41	41.5%	54.9%
D43	QGD semi-Slav	2252	37.0%	53.7%
D45	QGD semi-Slav, 5...Nd7	174	33.3%	46.6%
D44	QGD semi-Slav, 5.Bg5 dc	24	45.8%	47.9%
D45	QGD semi-Slav, 5.e3	185	41.1%	53.5%
D46	QGD semi-Slav, 6.Bd3	21	33.3%	54.8%
D47	QGD semi-Slav, 7.Bc4	20	25.0%	52.5%
D46	QGD semi-Slav, Bogolyubov variation	99	42.4%	53.5%
D44	QGD semi-Slav, Botvinnik system (anti-Meran)	33	39.4%	43.9%
D46	QGD semi-Slav, Chigorin defence	144	41.0%	57.3%
D44	QGD semi-Slav, Ekstrom variation	19	47.4%	39.5%
D43	QGD semi-Slav, Hastings variation	1	0.0%	100.0%
D48	QGD semi-Slav, Meran	9	0.0%	22.2%
D47	QGD semi-Slav, Meran variation	397	45.6%	56.0%
D48	QGD semi-Slav, Meran, 8...a6	508	40.6%	49.4%
D49	QGD semi-Slav, Meran, Blumenfeld variation	148	43.9%	47.6%
D48	QGD semi-Slav, Meran, Pirc variation	6	50.0%	58.3%
D49	QGD semi-Slav, Meran, Rabinovich variation	49	32.7%	46.9%
D49	QGD semi-Slav, Meran, Rellstab attack	15	33.3%	56.7%
D48	QGD semi-Slav, Meran, Reynolds' variation	460	37.4%	53.9%
D49	QGD semi-Slav, Meran, Sozin variation	121	38.8%	46.7%
D49	QGD semi-Slav, Meran, Stahlberg variation	75	41.3%	46.0%
D47	QGD semi-Slav, Meran, Wade variation	4671	35.6%	54.2%
D48	QGD semi-Slav, Meran, old main line	103	35.9%	56.8%
D46	QGD semi-Slav, Romih variation	119	37.8%	63.4%
D45	QGD semi-Slav, Rubinstein (anti-Meran) system	11	18.2%	36.4%
D45	QGD semi-Slav, Stoltz variation	5739	40.5%	52.9%
D45	QGD semi-Slav, accelerated Meran (Alekhine variation)	460	41.7%	50.4%
D44	QGD semi-Slav, anti-Meran gambit	413	34.1%	57.5%
D44	QGD semi-Slav, anti-Meran, Lilienthal variation	93	31.2%	64.0%
D44	QGD semi-Slav, anti-Meran, Szabo variation	16	18.8%	40.6%
D47	QGD semi-Slav, neo-Meran (Lundin variation)	127	39.4%	58.3%
D45	QGD semi-Slav, stonewall defence	2	50.0%	75.0%
D35	QGD, 3...Nf6	30	33.3%	50.0%
D31	QGD, 3.Nc3	84	40.5%	58.3%
D50	QGD, 4.Bg5	26	46.2%	50.0%
D53	QGD, 4.Bg5 Be7	93	39.8%	48.9%
D53	QGD, 4.Bg5 Be7, 5.e3 O-O	5	40.0%	60.0%
D51	QGD, 4.Bg5 Nbd7	21	28.6%	52.4%
D37	QGD, 4.Nf3	1303	41.7%	52.8%
D51	QGD, 5...c6	23	47.8%	58.7%
D55	QGD, 6.Nf3	26	30.8%	46.2%
D31	QGD, Alapin variation	2	50.0%	75.0%
D08	QGD, Albin counter-gambit	14	28.6%	64.3%
D09	QGD, Albin counter-gambit, 5.g3	7	28.6%	57.1%
D54	QGD, Anti-neo-orthodox variation	19	42.1%	47.4%
D50	QGD, Been-Koomen variation	3	0.0%	0.0%
D52	QGD, Cambridge Springs defence	1	100.0%	50.0%
D52	QGD, Cambridge Springs defence, 7.cd	9	66.7%	44.4%
D52	QGD, Cambridge Springs defence, Argentine variation	4	50.0%	25.0%
D52	QGD, Cambridge Springs defence, Bogoljubow variation	174	44.8%	52.3%
D52	QGD, Cambridge Springs defence, Capablanca variation	6	16.7%	58.3%
D52	QGD, Cambridge Springs defence, Rubinstein variation	46	43.5%	47.8%
D52	QGD, Cambridge Springs defence, Yugoslav variation	110	42.7%	53.2%
D30	QGD, Capablanca variation	4	50.0%	25.0%
D30	QGD, Capablanca-Duras variation	86	43.0%	55.2%
D31	QGD, Charousek (Petrosian) variation	295	41.0%	52.0%
D07	QGD, Chigorin defence	376	35.1%	57.7%
D07	QGD, Chigorin defence, Janowski variation	20	25.0%	67.5%
D06	QGD, Grau (Sahovic) defence	34	32.4%	66.2%
D35	QGD, Harrwitz attack	8	50.0%	50.0%
D30	QGD, Hastings variation	52	36.5%	54.8%
D31	QGD, Janowski variation	5	60.0%	30.0%
D56	QGD, Lasker defence	136	36.0%	55.5%
D57	QGD, Lasker defence, Bernstein variation	3	33.3%	83.3%
D56	QGD, Lasker defence, Teichmann variation	39	41.0%	41.0%
D57	QGD, Lasker defence, main line	26	69.2%	50.0%
D53	QGD, Lasker variation	3	33.3%	83.3%
D51	QGD, Manhattan variation	3	0.0%	100.0%
D06	QGD, Marshall defence	47	48.9%	60.6%
D55	QGD, Neo-orthodox variation	3	0.0%	66.7%
D55	QGD, Neo-orthodox variation, 7.Bh4	50	44.0%	60.0%
D55	QGD, Neo-orthodox variation, 7.Bxf6	92	41.3%	51.1%
D60	QGD, Orthodox defence	28	39.3%	58.9%
D63	QGD, Orthodox defence	21	66.7%	47.6%
D62	QGD, Orthodox defence, 7.Qc2 c5, 8.cd (Rubinstein)	73	52.1%	57.5%
D63	QGD, Orthodox defence, 7.Rc1	52	26.9%	55.8%
D66	QGD, Orthodox defence, Bd3 line	116	37.9%	62.9%
D67	QGD, Orthodox defence, Bd3 line	20	50.0%	45.0%
D67	QGD, Orthodox defence, Bd3 line, 11.O-O	35	28.6%	65.7%
D67	QGD, Orthodox defence, Bd3 line, Alekhine variation	38	50.0%	56.6%
D66	QGD, Orthodox defence, Bd3 line, fianchetto variation	4	25.0%	62.5%
D60	QGD, Orthodox defence, Botvinnik variation	31	32.3%	54.8%
D63	QGD, Orthodox defence, Capablanca variation	1	100.0%	50.0%
D63	QGD, Orthodox defence, Pillsbury attack	4	25.0%	62.5%
D60	QGD, Orthodox defence, Rauzer variation	8	0.0%	87.5%
D64	QGD, Orthodox defence, Rubinstein attack (with Rc1)	40	50.0%	55.0%
D64	QGD, Orthodox defence, Rubinstein attack, Gruenfeld variation	11	36.4%	45.5%
D64	QGD, Orthodox defence, Rubinstein attack, Karlsbad variation	12	25.0%	37.5%
D64	QGD, Orthodox defence, Rubinstein attack, Wolf variation	10	40.0%	50.0%
D65	QGD, Orthodox defence, Rubinstein attack, main line	3	33.3%	83.3%
D61	QGD, Orthodox defence, Rubinstein variation	109	45.9%	50.5%
D63	QGD, Orthodox defence, Swiss (Henneberger) variation	54	38.9%	60.2%
D63	QGD, Orthodox defence, Swiss, Karlsbad variation	108	41.7%	54.2%
D68	QGD, Orthodox defence, classical variation	63	47.6%	55.6%
D68	QGD, Orthodox defence, classical, 13.d1b1 (Maroczy)	3	66.7%	33.3%
D68	QGD, Orthodox defence, classical, 13.d1c2 (Vidmar)	40	55.0%	57.5%
D69	QGD, Orthodox defence, classical, 13.de	22	59.1%	47.7%
D55	QGD, Petrosian variation	273	48.7%	52.2%
D55	QGD, Pillsbury attack	1	100.0%	50.0%
D38	QGD, Ragozin variation	900	43.1%	51.6%
D39	QGD, Ragozin, Vienna variation	715	49.2%	52.3%
D50	QGD, Semi-Tarrasch	4	0.0%	25.0%
D40	QGD, Semi-Tarrasch defence	209	42.6%	52.9%
D40	QGD, Semi-Tarrasch defence, Pillsbury variation	2	0.0%	50.0%
D41	QGD, Semi-Tarrasch with e3	46	43.5%	56.5%
D41	QGD, Semi-Tarrasch, 5.cd	225	44.4%	59.1%
D42	QGD, Semi-Tarrasch, 7.Bd3	117	39.3%	60.7%
D41	QGD, Semi-Tarrasch, Kmoch variation	2	100.0%	50.0%
D50	QGD, Semi-Tarrasch, Primitive Pillsbury variation	2	0.0%	100.0%
D41	QGD, Semi-Tarrasch, San Sebastian variation	6	16.7%	91.7%
D32	QGD, Tarrasch defence	131	46.6%	54.6%
D32	QGD, Tarrasch defence, 4.cd ed	1	100.0%	50.0%
D32	QGD, Tarrasch defence, Marshall gambit	5	40.0%	40.0%
D32	QGD, Tarrasch defence, Tarrasch gambit	1	100.0%	50.0%
D33	QGD, Tarrasch, Folkestone (Swedish) variation	19	52.6%	52.6%
D33	QGD, Tarrasch, Prague variation	22	50.0%	61.4%
D34	QGD, Tarrasch, Prague variation, 7...Be7	67	40.3%	57.5%
D34	QGD, Tarrasch, Prague variation, 9.Bg5	392	48.0%	56.9%
D34	QGD, Tarrasch, Prague variation, Normal position	237	42.6%	54.2%
D34	QGD, Tarrasch, Reti variation	6	100.0%	50.0%
D33	QGD, Tarrasch, Schlechter-Rubinstein system	7	28.6%	42.9%
D33	QGD, Tarrasch, Wagner variation	4	25.0%	87.5%
D32	QGD, Tarrasch, von Hennig-Schara gambit	7	28.6%	71.4%
D58	QGD, Tartakower (Makagonov-Bondarevsky) system	3486	44.7%	51.7%
D59	QGD, Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5	105	50.5%	45.2%
D59	QGD, Tartakower variation	57	29.8%	43.0%
D30	QGD, Vienna variation	30	30.0%	55.0%
D37	QGD, classical variation (5.Bf4)	1309	41.3%	56.0%
D35	QGD, exchange variation	54	48.1%	53.7%
D35	QGD, exchange, Saemisch variation	73	53.4%	47.3%
D35	QGD, exchange, positional line	257	36.6%	54.9%
D35	QGD, exchange, positional line, 5...c6	163	40.5%	55.2%
D36	QGD, exchange, positional line, 6.Qc2	48	39.6%	44.8%
D31	QGD, semi-Slav	155	34.8%	52.9%
D31	QGD, semi-Slav, Abrahams variation	46	43.5%	45.7%
D31	QGD, semi-Slav, Junge variation	2	0.0%	50.0%
D31	QGD, semi-Slav, Koomen variation	4	25.0%	37.5%
D31	QGD, semi-Slav, Marshall gambit	166	39.8%	53.0%
D31	QGD, semi-Slav, Noteboom variation	33	18.2%	39.4%
D06	QGD, symmetrical (Austrian) defence	1	0.0%	0.0%
C40	QP counter-gambit (elephant gambit)	2	50.0%	75.0%
A50	Queen's Indian accelerated	25	32.0%	56.0%
A47	Queen's Indian defence	165	39.4%	57.3%
E12	Queen's Indian defence	121	31.4%	54.5%
E12	Queen's Indian, 4.Nc3	1715	36.8%	52.7%
E12	Queen's Indian, 4.Nc3, Botvinnik variation	12	16.7%	50.0%
E13	Queen's Indian, 4.Nc3, main line	62	32.3%	54.8%
E14	Queen's Indian, 4.e3	656	38.3%	53.9%
E15	Queen's Indian, 4.g3	278	34.9%	59.5%
E15	Queen's Indian, 4.g3 Bb7	56	35.7%	66.1%
E17	Queen's Indian, 5.Bg2 Be7	13	46.2%	46.2%
E14	Queen's Indian, Averbakh variation	1	0.0%	100.0%
E15	Queen's Indian, Buerger variation	2	100.0%	50.0%
E16	Queen's Indian, Capablanca variation	88	43.2%	54.5%
E17	Queen's Indian, Euwe variation	24	33.3%	62.5%
A47	Queen's Indian, Marienbad system	40	32.5%	51.3%
A47	Queen's Indian, Marienbad system, Berg variation	6	16.7%	58.3%
E12	Queen's Indian, Miles variation	152	36.2%	53.0%
E15	Queen's Indian, Nimzovich variation (exaggerated fianchetto)	8134	36.4%	56.3%
E17	Queen's Indian, Opovcensky variation	272	40.1%	55.3%
E12	Queen's Indian, Petrosian system	2419	38.0%	53.2%
E16	Queen's Indian, Riumin variation	71	35.2%	58.5%
E15	Queen's Indian, Rubinstein variation	26	34.6%	51.9%
E16	Queen's Indian, Yates variation	109	33.0%	57.8%
E17	Queen's Indian, anti-Queen's Indian system	55	43.6%	47.3%
E17	Queen's Indian, old main line, 6.O-O	140	42.1%	54.6%
E18	Queen's Indian, old main line, 7.Nc3	831	42.5%	57.2%
E19	Queen's Indian, old main line, 9.Qxc3	541	40.1%	58.3%
A41	Queen's Pawn	502	36.3%	53.6%
D02	Queen's bishop game	428	32.2%	50.9%
D20	Queen's gambit accepted	358	41.6%	57.1%
D23	Queen's gambit accepted	4	75.0%	37.5%
D30	Queen's gambit declined	1878	39.7%	55.0%
A40	Queen's pawn	1032	37.6%	55.5%
A45	Queen's pawn game	569	39.5%	53.5%
A46	Queen's pawn game	863	35.8%	55.2%
A50	Queen's pawn game	154	37.0%	57.5%
D00	Queen's pawn game	36	41.7%	54.2%
D02	Queen's pawn game	2156	37.2%	52.9%
D04	Queen's pawn game	181	35.9%	50.0%
D05	Queen's pawn game	133	32.3%	53.0%
E00	Queen's pawn game	185	39.5%	54.9%
E10	Queen's pawn game	1114	41.8%	57.3%
D02	Queen's pawn game, Chigorin variation	86	45.3%	59.9%
D02	Queen's pawn game, Krause variation	102	45.1%	52.0%
D05	Queen's pawn game, Rubinstein (Colle-Zukertort) variation	46	41.3%	55.4%
D05	Queen's pawn game, Zukertort variation	8	25.0%	62.5%
A40	Queen's pawn, Charlick (Englund) gambit	1	100.0%	50.0%
D00	Queen's pawn, Chigorin variation	15	53.3%	60.0%
A40	Queen's pawn, English defence	30	30.0%	71.7%
A40	Queen's pawn, Franco-Indian (Keres) defence	225	33.8%	52.4%
A40	Queen's pawn, Keres defence	373	39.7%	58.4%
A40	Queen's pawn, Lundin (Kevitz-Mikenas) defence	41	29.3%	65.9%
D00	Queen's pawn, Mason variation	264	40.5%	51.7%
D00	Queen's pawn, Mason variation, Steinitz counter-gambit	21	42.9%	54.8%
E60	Queen's pawn, Mengarini attack	11	9.1%	86.4%
A46	Queen's pawn, Torre attack	424	35.6%	48.5%
A46	Queen's pawn, Torre attack, Wagner gambit	1	0.0%	100.0%
A46	Queen's pawn, Yusupov-Rubinstein system	155	33.5%	56.8%
D00	Queen's pawn, stonewall attack	4	0.0%	75.0%
A09	Reti accepted	63	47.6%	50.8%
A09	Reti accepted, Keres variation	16	25.0%	68.8%
A04	Reti opening	2821	37.0%	54.0%
A05	Reti opening	1187	37.7%	53.5%
A06	Reti opening	348	36.2%	52.9%
A09	Reti opening	77	39.0%	53.2%
A04	Reti v Dutch	291	32.0%	57.2%
A05	Reti, King's Indian attack	360	42.2%	54.2%
A07	Reti, King's Indian attack	181	33.1%	47.0%
A08	Reti, King's Indian attack	312	42.0%	50.5%
A07	Reti, King's Indian attack (Barcza system)	1840	41.4%	53.6%
A07	Reti, King's Indian attack (with ...c5)	90	40.0%	56.7%
A08	Reti, King's Indian attack, French variation	172	34.3%	43.9%
A07	Reti, King's Indian attack, Keres variation	197	36.0%	52.5%
A07	Reti, King's Indian attack, Pachman system	103	49.5%	54.9%
A05	Reti, King's Indian attack, Reti-Smyslov variation	24	45.8%	56.3%
A05	Reti, King's Indian attack, Spassky's variation	103	41.7%	50.0%
A07	Reti, King's Indian attack, Yugoslav variation	659	38.2%	52.8%
A04	Reti, Lisitsin gambit deferred	2	50.0%	25.0%
A06	Reti, Nimzovich-Larsen attack	266	35.3%	49.6%
A04	Reti, Pirc-Lisitsin gambit	54	35.2%	56.5%
A04	Reti, Wade defence	2	0.0%	50.0%
A09	Reti, advance variation	148	40.5%	47.3%
A06	Reti, old Indian attack	25	28.0%	38.0%
B00	Reversed Grob (Borg/Basman defence/macho Grob)	5	20.0%	90.0%
D01	Richter-Veresov attack	103	31.1%	41.7%
D01	Richter-Veresov attack, Richter variation	3	66.7%	66.7%
D01	Richter-Veresov attack, Veresov variation	7	42.9%	50.0%
B06	Robatsch (modern) defence	1471	35.4%	57.1%
B06	Robatsch defence	244	33.6%	58.2%
B07	Robatsch defence, Geller's system	284	35.9%	60.6%
B06	Robatsch defence, Gurgenidze variation	21	38.1%	57.1%
B06	Robatsch defence, Pseudo-Austrian attack	131	26.7%	63.0%
A41	Robatsch defence, Rossolimo variation	44	38.6%	44.3%
B06	Robatsch defence, Two knights variation	151	37.7%	60.6%
B06	Robatsch defence, Two knights, Suttles variation	776	39.3%	57.9%
B06	Robatsch defence, three pawns attack	11	45.5%	59.1%
C70	Ruy Lopez	2	0.0%	50.0%
C60	Ruy Lopez (Spanish opening)	8	62.5%	43.8%
C78	Ruy Lopez, ...b5 & ...d6	9	11.1%	61.1%
C78	Ruy Lopez, 5.O-O	300	43.7%	60.2%
C70	Ruy Lopez, Alapin's defence deferred	15	33.3%	76.7%
C77	Ruy Lopez, Anderssen variation	124	46.8%	52.4%
C78	Ruy Lopez, Archangelsk (counterthrust) variation	317	38.2%	55.0%
C65	Ruy Lopez, Berlin defence	265	30.9%	47.5%
C65	Ruy Lopez, Berlin defence, 4.O-O	32	28.1%	48.4%
C66	Ruy Lopez, Berlin defence, 4.O-O, d6	58	53.4%	50.9%
C65	Ruy Lopez, Berlin defence, Beverwijk variation	167	34.1%	53.6%
C67	Ruy Lopez, Berlin defence, Cordel variation	9	33.3%	50.0%
C65	Ruy Lopez, Berlin defence, Duras variation	10	30.0%	45.0%
C65	Ruy Lopez, Berlin defence, Kaufmann variation	3	66.7%	66.7%
C67	Ruy Lopez, Berlin defence, Minckwitz variation	11	45.5%	68.2%
C65	Ruy Lopez, Berlin defence, Nyholm attack	25	44.0%	62.0%
C67	Ruy Lopez, Berlin defence, Pillsbury variation	1	0.0%	0.0%
C67	Ruy Lopez, Berlin defence, Rosenthal variation	6	33.3%	83.3%
C67	Ruy Lopez, Berlin defence, Trifunovic variation	4	25.0%	87.5%
C67	Ruy Lopez, Berlin defence, Winawer attack	12	25.0%	79.2%
C67	Ruy Lopez, Berlin defence, Zukertort variation	5	20.0%	70.0%
C66	Ruy Lopez, Berlin defence, hedgehog variation	75	57.3%	59.3%
C67	Ruy Lopez, Berlin defence, open variation	954	43.6%	52.6%
C61	Ruy Lopez, Bird's defence	34	41.2%	58.8%
C70	Ruy Lopez, Caro variation	17	29.4%	55.9%
C70	Ruy Lopez, Classical defence deferred	64	46.9%	54.7%
C64	Ruy Lopez, Cordel gambit	14	50.0%	39.3%
C60	Ruy Lopez, Cozio defence	37	48.6%	51.4%
C70	Ruy Lopez, Cozio defence deferred	4	25.0%	37.5%
C60	Ruy Lopez, Cozio defence, Paulsen variation	6	16.7%	75.0%
C85	Ruy Lopez, Exchange variation doubly deferred (DERLD)	571	36.3%	49.3%
C70	Ruy Lopez, Graz variation	4	100.0%	50.0%
C89	Ruy Lopez, Marshall counter-attack	71	40.8%	51.4%
C89	Ruy Lopez, Marshall counter-attack, 11...c6	58	43.1%	52.6%
C89	Ruy Lopez, Marshall, Herman Steiner variation	1	100.0%	50.0%
C89	Ruy Lopez, Marshall, Kevitz variation	2	100.0%	50.0%
C89	Ruy Lopez, Marshall, main line, 12.d2d4	102	43.1%	59.8%
C89	Ruy Lopez, Marshall, main line, 14...Qh3	113	36.3%	55.3%
C78	Ruy Lopez, Moeller defence	242	37.6%	53.5%
C77	Ruy Lopez, Morphy defence	120	40.8%	58.8%
C77	Ruy Lopez, Morphy defence, Duras variation	7	28.6%	42.9%
C63	Ruy Lopez, Schliemann defence	12	25.0%	54.2%
C70	Ruy Lopez, Schliemann defence deferred	1	0.0%	100.0%
C63	Ruy Lopez, Schliemann defence, Berger variation	49	28.6%	59.2%
C74	Ruy Lopez, Siesta, Kopayev variation	29	27.6%	44.8%
C79	Ruy Lopez, Steinitz defence deferred (Russian defence)	117	34.2%	54.7%
C79	Ruy Lopez, Steinitz defence deferred, Lipnitsky variation	12	66.7%	58.3%
C79	Ruy Lopez, Steinitz defence deferred, Rubinstein variation	8	50.0%	37.5%
C70	Ruy Lopez, Taimanov (chase/wing/accelerated counterthrust) variation	77	32.5%	66.9%
C88	Ruy Lopez, Trajkovic counter-attack	21	28.6%	57.1%
C77	Ruy Lopez, Treybal (Bayreuth) variation (exchange var. deferred)	26	50.0%	51.9%
C78	Ruy Lopez, Wing attack	2	0.0%	100.0%
C77	Ruy Lopez, Wormald (Alapin) attack	78	29.5%	59.6%
C77	Ruy Lopez, Wormald attack, Gruenfeld variation	2	100.0%	50.0%
C86	Ruy Lopez, Worrall attack	11	54.5%	54.5%
C86	Ruy Lopez, Worrall attack, sharp line	66	30.3%	56.1%
C86	Ruy Lopez, Worrall attack, solid line	30	43.3%	58.3%
C64	Ruy Lopez, classical (Cordel) defence	69	31.9%	53.6%
C64	Ruy Lopez, classical defence, 4.c3	46	32.6%	57.6%
C64	Ruy Lopez, classical defence, Benelux variation	207	36.7%	56.5%
C64	Ruy Lopez, classical defence, Charousek variation	2	50.0%	75.0%
C88	Ruy Lopez, closed	445	38.4%	52.2%
C96	Ruy Lopez, closed (10...c5)	319	35.1%	58.9%
C96	Ruy Lopez, closed (8...Na5)	10	40.0%	70.0%
C90	Ruy Lopez, closed (with ...d6)	618	33.3%	50.8%
C66	Ruy Lopez, closed Berlin defence, Bernstein variation	10	20.0%	50.0%
C66	Ruy Lopez, closed Berlin defence, Chigorin variation	2	0.0%	50.0%
C66	Ruy Lopez, closed Berlin defence, Showalter variation	36	52.8%	59.7%
C66	Ruy Lopez, closed Berlin defence, Wolf variation	45	55.6%	54.4%
C84	Ruy Lopez, closed defence	524	39.1%	52.8%
C88	Ruy Lopez, closed, 7...O-O	1106	35.4%	54.2%
C88	Ruy Lopez, closed, 7...d6, 8.d4	9	22.2%	11.1%
C88	Ruy Lopez, closed, 8.c3	2	0.0%	0.0%
C91	Ruy Lopez, closed, 9.d4	571	34.0%	56.2%
C92	Ruy Lopez, closed, 9.h3	215	44.7%	48.4%
C87	Ruy Lopez, closed, Averbach variation	128	35.9%	60.2%
C88	Ruy Lopez, closed, Balla variation	12	41.7%	62.5%
C84	Ruy Lopez, closed, Basque gambit (North Spanish variation)	2	50.0%	25.0%
C91	Ruy Lopez, closed, Bogolyubov variation	2059	39.0%	54.7%
C96	Ruy Lopez, closed, Borisenko defence	37	37.8%	56.8%
C94	Ruy Lopez, closed, Breyer defence	20	30.0%	60.0%
C95	Ruy Lopez, closed, Breyer, Borisenko variation	628	39.3%	56.6%
C95	Ruy Lopez, closed, Breyer, Gligoric variation	31	45.2%	58.1%
C95	Ruy Lopez, closed, Breyer, Simagin variation	12	33.3%	75.0%
C97	Ruy Lopez, closed, Chigorin defence	534	31.6%	63.4%
C98	Ruy Lopez, closed, Chigorin, 12...Nc6	152	31.6%	61.2%
C99	Ruy Lopez, closed, Chigorin, 12...c5d4	889	40.3%	62.8%
C92	Ruy Lopez, closed, Flohr-Zaitsev system (Lenzerheide variation)	1479	38.9%	55.6%
C96	Ruy Lopez, closed, Keres (...Nd7) defence	128	32.8%	64.1%
C92	Ruy Lopez, closed, Keres (9...a5) variation	10	60.0%	50.0%
C92	Ruy Lopez, closed, Kholmov variation	93	33.3%	65.1%
C90	Ruy Lopez, closed, Lutikov variation	6	50.0%	58.3%
C90	Ruy Lopez, closed, Pilnik variation	456	35.5%	49.6%
C92	Ruy Lopez, closed, Ragozin-Petrosian (`Keres') variation	228	40.4%	65.4%
C96	Ruy Lopez, closed, Rossolimo defence	2	0.0%	0.0%
C93	Ruy Lopez, closed, Smyslov defence	94	42.6%	54.3%
C90	Ruy Lopez, closed, Suetin variation	19	31.6%	57.9%
C88	Ruy Lopez, closed, anti-Marshall 8.a4	567	35.6%	51.3%
C84	Ruy Lopez, closed, centre attack	26	42.3%	48.1%
C68	Ruy Lopez, exchange variation	30	43.3%	55.0%
C69	Ruy Lopez, exchange variation, 5.O-O	153	40.5%	49.7%
C69	Ruy Lopez, exchange variation, Alapin gambit	23	30.4%	45.7%
C68	Ruy Lopez, exchange, Alekhine variation	8	50.0%	25.0%
C69	Ruy Lopez, exchange, Bronstein variation	148	31.8%	50.3%
C69	Ruy Lopez, exchange, Gligoric variation	200	36.5%	64.8%
C68	Ruy Lopez, exchange, Keres variation	26	73.1%	48.1%
C68	Ruy Lopez, exchange, Romanovsky variation	5	40.0%	60.0%
C60	Ruy Lopez, fianchetto (Smyslov/Barnes) defence	79	32.9%	55.7%
C70	Ruy Lopez, fianchetto defence deferred	2	50.0%	25.0%
C77	Ruy Lopez, four knights (Tarrasch) variation	47	38.3%	51.1%
C71	Ruy Lopez, modern Steinitz defence	34	35.3%	55.9%
C74	Ruy Lopez, modern Steinitz defence	12	33.3%	58.3%
C75	Ruy Lopez, modern Steinitz defence	37	45.9%	55.4%
C72	Ruy Lopez, modern Steinitz defence, 5.O-O	125	41.6%	60.8%
C73	Ruy Lopez, modern Steinitz defence, Alapin variation	32	31.3%	56.3%
C71	Ruy Lopez, modern Steinitz defence, Duras (Keres) variation	39	35.9%	48.7%
C73	Ruy Lopez, modern Steinitz defence, Richter variation	43	46.5%	51.2%
C75	Ruy Lopez, modern Steinitz defence, Rubinstein variation	32	28.1%	57.8%
C71	Ruy Lopez, modern Steinitz defence, Three knights variation	8	50.0%	50.0%
C76	Ruy Lopez, modern Steinitz defence, fianchetto (Bronstein) variation	138	36.2%	52.9%
C74	Ruy Lopez, modern Steinitz defence, siesta variation	7	42.9%	64.3%
C62	Ruy Lopez, old Steinitz defence	132	28.0%	55.7%
C62	Ruy Lopez, old Steinitz defence, Nimzovich attack	5	20.0%	50.0%
C80	Ruy Lopez, open (Tarrasch) defence	42	38.1%	59.5%
C67	Ruy Lopez, open Berlin defence, 5...Be7	26	30.8%	50.0%
C67	Ruy Lopez, open Berlin defence, Showalter variation	2	50.0%	25.0%
C67	Ruy Lopez, open Berlin defence, l'Hermet variation	10	50.0%	35.0%
C80	Ruy Lopez, open, 6.d4	11	27.3%	40.9%
C80	Ruy Lopez, open, 7.Bb3	44	40.9%	54.5%
C80	Ruy Lopez, open, 8...Be6	319	34.2%	47.8%
C83	Ruy Lopez, open, 9...Be7, 10.Re1	11	36.4%	54.5%
C80	Ruy Lopez, open, Berger variation	2	100.0%	50.0%
C82	Ruy Lopez, open, Berlin variation	8	37.5%	56.3%
C80	Ruy Lopez, open, Bernstein variation	210	41.4%	64.0%
C80	Ruy Lopez, open, Bernstein variation, Karpov gambit	17	41.2%	44.1%
C82	Ruy Lopez, open, Dilworth variation	24	45.8%	52.1%
C80	Ruy Lopez, open, Friess attack	6	16.7%	41.7%
C80	Ruy Lopez, open, Harksen gambit	1	0.0%	100.0%
C81	Ruy Lopez, open, Howell attack	25	48.0%	52.0%
C81	Ruy Lopez, open, Howell attack, Adam variation	1	0.0%	0.0%
C82	Ruy Lopez, open, Italian variation	14	21.4%	75.0%
C83	Ruy Lopez, open, Malkin variation	6	50.0%	75.0%
C82	Ruy Lopez, open, Motzko attack	9	55.6%	50.0%
C82	Ruy Lopez, open, Motzko attack, Nenarokov variation	2	50.0%	75.0%
C80	Ruy Lopez, open, Riga variation	6	83.3%	58.3%
C80	Ruy Lopez, open, Schlechter defence	4	50.0%	50.0%
C82	Ruy Lopez, open, St. Petersburg variation	50	36.0%	58.0%
C80	Ruy Lopez, open, Tartakower variation	2	0.0%	50.0%
C80	Ruy Lopez, open, Zukertort variation	2	0.0%	50.0%
C83	Ruy Lopez, open, classical defence	56	44.6%	50.9%
A06	Santasiere's folly	13	23.1%	50.0%
A00	Saragossa opening	17	35.3%	58.8%
B01	Scandinavian (centre counter) defence	229	37.6%	58.1%
B01	Scandinavian defence	99	40.4%	54.5%
B01	Scandinavian defence, Gruenfeld variation	3	33.3%	50.0%
B01	Scandinavian defence, Lasker variation	20	35.0%	57.5%
B01	Scandinavian gambit	35	42.9%	61.4%
B01	Scandinavian, Anderssen counter-attack orthodox attack	1	0.0%	100.0%
B01	Scandinavian, Anderssen counter-attack, Collijn variation	1	0.0%	100.0%
B01	Scandinavian, Icelandic gambit	14	42.9%	57.1%
B01	Scandinavian, Marshall variation	131	40.5%	65.3%
B01	Scandinavian, Pytel-Wade variation	76	44.7%	57.9%
C44	Scotch gambit	13	38.5%	42.3%
C44	Scotch gambit, Anderssen (Paulsen, Suhle) counter-attack	7	57.1%	28.6%
C44	Scotch gambit, Benima defence	3	33.3%	50.0%
C44	Scotch gambit, Dubois-Reti defence	115	35.7%	50.9%
C45	Scotch game	1039	39.0%	53.5%
C45	Scotch, Blackburne attack	1	0.0%	0.0%
C45	Scotch, Blumenfeld attack	14	50.0%	32.1%
C45	Scotch, Ghulam Kassim variation	2	100.0%	50.0%
C44	Scotch, Goering gambit	22	40.9%	43.2%
C45	Scotch, Horwitz attack	12	25.0%	70.8%
C44	Scotch, Lolli variation	11	45.5%	50.0%
C45	Scotch, Meitner variation	5	80.0%	40.0%
C45	Scotch, Mieses variation	484	33.1%	55.2%
C45	Scotch, Potter variation	29	48.3%	48.3%
C44	Scotch, Relfsson gambit ('MacLopez')	1	0.0%	100.0%
C45	Scotch, Romanishin variation	12	50.0%	66.7%
C45	Scotch, Schmidt variation	218	58.7%	42.7%
C45	Scotch, Steinitz variation	6	0.0%	83.3%
C45	Scotch, Tartakower variation	2	50.0%	25.0%
A44	Semi-Benoni (`blockade variation')	29	27.6%	62.1%
B50	Sicilian	703	36.1%	55.5%
B54	Sicilian	304	35.2%	54.8%
B56	Sicilian	498	34.3%	53.9%
B20	Sicilian defence	446	34.5%	51.3%
B27	Sicilian defence	2	50.0%	75.0%
B30	Sicilian defence	635	38.7%	52.8%
B32	Sicilian defence	217	32.3%	57.6%
B33	Sicilian defence	200	34.0%	51.5%
B40	Sicilian defence	1462	36.6%	54.5%
B44	Sicilian defence	154	39.6%	49.0%
B22	Sicilian, 2.c3, Heidenfeld variation	2	50.0%	75.0%
B22	Sicilian, Alapin's variation (2.c3)	1752	39.0%	55.1%
B40	Sicilian, Anderssen variation	231	33.3%	57.8%
B58	Sicilian, Boleslavsky variation	234	36.3%	48.5%
B59	Sicilian, Boleslavsky variation, 7.Nb3	32	25.0%	50.0%
B58	Sicilian, Boleslavsky, Louma variation	1	0.0%	100.0%
B51	Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack	383	43.6%	54.2%
B52	Sicilian, Canal-Sokolsky attack, 3...Bd7	319	39.5%	50.2%
B52	Sicilian, Canal-Sokolsky attack, Bronstein gambit	38	31.6%	60.5%
B52	Sicilian, Canal-Sokolsky attack, Sokolsky variation	190	45.8%	55.5%
B53	Sicilian, Chekhover variation	162	38.3%	53.1%
B53	Sicilian, Chekhover, Zaitsev variation	11	9.1%	68.2%
B32	Sicilian, Flohr variation	79	36.7%	62.7%
B21	Sicilian, Grand Prix attack	256	35.9%	49.2%
B23	Sicilian, Grand Prix attack	120	32.5%	49.6%
B23	Sicilian, Grand Prix attack, Schofman variation	8	37.5%	68.8%
B27	Sicilian, Hungarian variation	3014	40.8%	58.7%
B41	Sicilian, Kan variation	69	36.2%	58.7%
B42	Sicilian, Kan, 5.Bd3	650	36.0%	56.6%
B43	Sicilian, Kan, 5.Nc3	657	34.6%	57.2%
B42	Sicilian, Kan, Gipslis variation	45	33.3%	56.7%
B41	Sicilian, Kan, Maroczy bind (Reti variation)	98	31.6%	52.6%
B41	Sicilian, Kan, Maroczy bind - Bronstein variation	14	28.6%	28.6%
B42	Sicilian, Kan, Polugaievsky variation	372	37.1%	55.4%
B42	Sicilian, Kan, Swiss cheese variation	54	35.2%	62.0%
B27	Sicilian, Katalimov variation	8	50.0%	62.5%
B20	Sicilian, Keres variation (2.Ne2)	75	38.7%	58.0%
B32	Sicilian, Labourdonnais-Loewenthal (Kalashnikov) variation	479	38.8%	59.7%
B32	Sicilian, Labourdonnais-Loewenthal variation	49	49.0%	55.1%
B57	Sicilian, Magnus Smith trap	5	40.0%	40.0%
B40	Sicilian, Marshall variation	1	0.0%	100.0%
B90	Sicilian, Najdorf	682	30.6%	52.9%
B98	Sicilian, Najdorf variation	74	32.4%	64.9%
B95	Sicilian, Najdorf, 6...e6	78	30.8%	41.0%
B94	Sicilian, Najdorf, 6.Bg5	58	27.6%	60.3%
B93	Sicilian, Najdorf, 6.f4	643	40.1%	50.7%
B98	Sicilian, Najdorf, 7...Be7	62	38.7%	53.2%
B99	Sicilian, Najdorf, 7...Be7 main line	349	24.4%	54.3%
B97	Sicilian, Najdorf, 7...Qb6	398	26.1%	45.2%
B96	Sicilian, Najdorf, 7.f4	162	37.0%	45.7%
B90	Sicilian, Najdorf, Adams attack	27	40.7%	57.4%
B98	Sicilian, Najdorf, Browne variation	21	23.8%	78.6%
B90	Sicilian, Najdorf, Byrne (English) attack	6934	30.8%	53.2%
B98	Sicilian, Najdorf, Goteborg (Argentine) variation	16	25.0%	50.0%
B90	Sicilian, Najdorf, Lipnitzky attack	257	32.3%	49.6%
B92	Sicilian, Najdorf, Opovcensky variation	1530	38.0%	52.4%
B97	Sicilian, Najdorf, Poisoned pawn variation	578	44.3%	48.3%
B96	Sicilian, Najdorf, Polugayevsky variation	24	33.3%	54.2%
B96	Sicilian, Najdorf, Polugayevsky, Simagin variation	15	26.7%	53.3%
B91	Sicilian, Najdorf, Zagreb (fianchetto) variation	141	34.8%	55.0%
B32	Sicilian, Nimzovich variation	8	25.0%	37.5%
B31	Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6)	717	37.9%	55.0%
B30	Sicilian, Nimzovich-Rossolimo attack (without ...d6)	1043	34.7%	58.3%
B31	Sicilian, Nimzovich-Rossolimo attack, Gurgenidze variation	2	100.0%	50.0%
B29	Sicilian, Nimzovich-Rubinstein variation	37	40.5%	58.1%
B29	Sicilian, Nimzovich-Rubinstein; Rubinstein counter-gambit	13	23.1%	42.3%
B28	Sicilian, O'Kelly variation	51	39.2%	52.9%
B33	Sicilian, Pelikan (Lasker/Sveshnikov) variation	186	26.9%	53.2%
B33	Sicilian, Pelikan, Bird variation	92	43.5%	55.4%
B33	Sicilian, Pelikan, Chelyabinsk variation	1098	32.6%	58.4%
B40	Sicilian, Pin variation (Sicilian counter-attack)	1	0.0%	100.0%
B40	Sicilian, Pin, Koch variation	11	18.2%	72.7%
B54	Sicilian, Prins (Moscow) variation	107	35.5%	55.1%
B55	Sicilian, Prins variation, Venice attack	9	44.4%	66.7%
B27	Sicilian, Quinteros variation	8	25.0%	87.5%
B60	Sicilian, Richter-Rauzer	81	29.6%	61.7%
B62	Sicilian, Richter-Rauzer, 6...e6	23	34.8%	56.5%
B60	Sicilian, Richter-Rauzer, Bondarevsky variation	6	33.3%	33.3%
B62	Sicilian, Richter-Rauzer, Keres variation	43	23.3%	51.2%
B60	Sicilian, Richter-Rauzer, Larsen variation	38	28.9%	59.2%
B61	Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2	135	32.6%	57.8%
B62	Sicilian, Richter-Rauzer, Margate (Alekhine) variation	23	30.4%	54.3%
B62	Sicilian, Richter-Rauzer, Podvebrady variation	13	61.5%	38.5%
B63	Sicilian, Richter-Rauzer, Rauzer attack	46	26.1%	58.7%
B63	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7	427	30.4%	55.3%
B65	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9...Nxd4	306	37.3%	58.2%
B64	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9.f4	183	37.7%	51.1%
B66	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6	4267	32.3%	51.6%
B69	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 11.Bxf6	85	32.9%	61.2%
B67	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 8...Bd7	1286	30.6%	55.1%
B68	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 9...Be7	52	34.6%	63.5%
B64	Sicilian, Richter-Rauzer, Rauzer attack, Geller variation	7	42.9%	64.3%
B84	Sicilian, Scheveningen (Paulsen), classical variation	1990	36.8%	49.9%
B80	Sicilian, Scheveningen variation	457	31.1%	54.5%
B83	Sicilian, Scheveningen, 6.Be2	316	39.2%	52.2%
B82	Sicilian, Scheveningen, 6.f4	207	31.9%	56.5%
B80	Sicilian, Scheveningen, English variation	79	27.8%	53.2%
B81	Sicilian, Scheveningen, Keres attack	1079	30.9%	60.9%
B82	Sicilian, Scheveningen, Tal variation	38	34.2%	69.7%
B80	Sicilian, Scheveningen, Vitolins variation	3	66.7%	33.3%
B85	Sicilian, Scheveningen, classical	91	38.5%	54.4%
B85	Sicilian, Scheveningen, classical main line	209	43.5%	54.8%
B85	Sicilian, Scheveningen, classical, Maroczy system	19	31.6%	52.6%
B84	Sicilian, Scheveningen, classical, Nd7 system	17	29.4%	55.9%
B80	Sicilian, Scheveningen, fianchetto variation	92	37.0%	45.7%
B21	Sicilian, Smith-Morra gambit	26	42.3%	51.9%
B86	Sicilian, Sozin attack	45	40.0%	46.7%
B87	Sicilian, Sozin with ...a6 and ...b5	429	35.9%	52.9%
B89	Sicilian, Sozin, 7.Be3	549	32.4%	51.9%
B57	Sicilian, Sozin, Benko variation	563	39.4%	49.7%
B88	Sicilian, Sozin, Fischer variation	8	50.0%	62.5%
B88	Sicilian, Sozin, Leonhardt variation	244	38.5%	57.4%
B57	Sicilian, Sozin, not Scheveningen	68	39.7%	53.7%
B20	Sicilian, Steinitz variation	172	44.2%	47.1%
B33	Sicilian, Sveshnikov variation	654	35.2%	51.7%
B44	Sicilian, Szen (`anti-Taimanov') variation	273	41.4%	50.7%
B44	Sicilian, Szen variation, Dely-Kasparov gambit	4	50.0%	50.0%
B44	Sicilian, Szen, hedgehog variation	153	34.6%	52.0%
B47	Sicilian, Taimanov (Bastrikov) variation	2076	38.3%	54.5%
B45	Sicilian, Taimanov variation	941	38.4%	57.0%
B46	Sicilian, Taimanov variation	1448	38.8%	54.8%
B48	Sicilian, Taimanov variation	1092	34.6%	53.4%
B49	Sicilian, Taimanov variation	305	40.7%	56.1%
B45	Sicilian, Taimanov, American attack	6	33.3%	33.3%
B89	Sicilian, Velimirovic attack	401	29.2%	51.5%
B56	Sicilian, Venice attack	30	50.0%	48.3%
B39	Sicilian, accelerated fianchetto, Breyer variation	455	39.6%	56.5%
B36	Sicilian, accelerated fianchetto, Gurgenidze variation	132	36.4%	61.4%
B36	Sicilian, accelerated fianchetto, Maroczy bind	430	44.7%	58.4%
B37	Sicilian, accelerated fianchetto, Maroczy bind, 5...Bg7	75	52.0%	60.7%
B38	Sicilian, accelerated fianchetto, Maroczy bind, 6.Be3	810	42.6%	58.2%
B37	Sicilian, accelerated fianchetto, Simagin variation	2	100.0%	50.0%
B34	Sicilian, accelerated fianchetto, exchange variation	1	0.0%	100.0%
B34	Sicilian, accelerated fianchetto, modern variation	170	35.3%	53.5%
B35	Sicilian, accelerated fianchetto, modern variation with Bc4	892	42.2%	52.7%
B23	Sicilian, chameleon variation	93	35.5%	59.7%
B58	Sicilian, classical	98	43.9%	45.4%
B23	Sicilian, closed	710	33.5%	51.5%
B24	Sicilian, closed	102	30.4%	50.5%
B25	Sicilian, closed	61	36.1%	54.1%
B23	Sicilian, closed, 2...Nc6	233	41.2%	57.1%
B26	Sicilian, closed, 6.Be3	109	33.9%	48.2%
B25	Sicilian, closed, 6.Ne2 e5 (Botvinnik)	14	35.7%	46.4%
B25	Sicilian, closed, 6.f4	87	41.4%	51.7%
B25	Sicilian, closed, 6.f4 e5 (Botvinnik)	22	50.0%	47.7%
B23	Sicilian, closed, Korchnoi variation	29	37.9%	43.1%
B24	Sicilian, closed, Smyslov variation	2	0.0%	100.0%
B70	Sicilian, dragon variation	216	37.0%	50.0%
B72	Sicilian, dragon, 6.Be3	18	33.3%	55.6%
B71	Sicilian, dragon, Levenfish variation	7	28.6%	57.1%
B75	Sicilian, dragon, Yugoslav attack	76	31.6%	64.5%
B78	Sicilian, dragon, Yugoslav attack, 10.O-O-O	101	23.8%	50.5%
B79	Sicilian, dragon, Yugoslav attack, 12.h4	9	22.2%	55.6%
B76	Sicilian, dragon, Yugoslav attack, 7...O-O	72	25.0%	52.8%
B77	Sicilian, dragon, Yugoslav attack, 9...Bd7	125	41.6%	60.8%
B77	Sicilian, dragon, Yugoslav attack, 9.Bc4	26	34.6%	59.6%
B76	Sicilian, dragon, Yugoslav attack, Rauser variation	291	27.5%	66.7%
B72	Sicilian, dragon, classical attack	10	60.0%	40.0%
B73	Sicilian, dragon, classical, 8.O-O	102	47.1%	52.9%
B74	Sicilian, dragon, classical, 9.Nb3	81	42.0%	50.6%
B74	Sicilian, dragon, classical, Alekhine variation	6	16.7%	75.0%
B72	Sicilian, dragon, classical, Amsterdam variation	19	31.6%	52.6%
B72	Sicilian, dragon, classical, Grigoriev variation	12	25.0%	45.8%
B72	Sicilian, dragon, classical, Nottingham variation	8	50.0%	50.0%
B74	Sicilian, dragon, classical, Reti-Tartakower variation	33	39.4%	62.1%
B73	Sicilian, dragon, classical, Richter variation	44	38.6%	60.2%
B74	Sicilian, dragon, classical, Spielmann variation	8	37.5%	56.3%
B73	Sicilian, dragon, classical, Zollner gambit	6	50.0%	58.3%
B83	Sicilian, modern Scheveningen	180	40.6%	48.6%
B83	Sicilian, modern Scheveningen, main line	201	43.3%	58.5%
B83	Sicilian, modern Scheveningen, main line with Nb3	38	31.6%	65.8%
B20	Sicilian, wing gambit	4	75.0%	62.5%
B20	Sicilian, wing gambit, Carlsbad variation	4	25.0%	37.5%
C00	St. George defence	26	53.8%	65.4%
A06	Tennison (Lemberg, Zukertort) gambit	1	0.0%	100.0%
C46	Three knights game	52	36.5%	51.0%
C46	Three knights, Schlechter variation	1	0.0%	0.0%
C46	Three knights, Steinitz variation	10	30.0%	55.0%
C46	Three knights, Steinitz, Rosenthal variation	1	0.0%	0.0%
D03	Torre attack (Tartakower variation)	111	37.8%	49.5%
A45	Trompovsky attack (Ruth, Opovcensky opening)	768	32.0%	52.9%
C55	Two knights defence	16	37.5%	56.3%
C56	Two knights defence	27	51.9%	48.1%
C58	Two knights defence	33	45.5%	56.1%
C59	Two knights defence	96	41.7%	55.2%
C55	Two knights defence (Modern bishop's opening)	417	37.2%	57.0%
C58	Two knights defence, Blackburne variation	2	0.0%	100.0%
C56	Two knights defence, Canal variation	2	100.0%	50.0%
C57	Two knights defence, Fegatello attack	1	0.0%	0.0%
C57	Two knights defence, Fegatello attack, Leonhardt variation	1	0.0%	0.0%
C57	Two knights defence, Fegatello attack, Polerio defence	3	0.0%	100.0%
C57	Two knights defence, Fritz variation	2	100.0%	50.0%
C59	Two knights defence, Goering variation	4	25.0%	12.5%
C57	Two knights defence, Lolli attack	1	0.0%	100.0%
C58	Two knights defence, Paoli variation	5	40.0%	60.0%
C55	Two knights defence, Perreux variation	6	50.0%	58.3%
C59	Two knights defence, Steinitz variation	224	27.7%	50.4%
C57	Two knights defence, Ulvestad variation	5	40.0%	20.0%
C56	Two knights defence, Yurdansky attack	1	0.0%	0.0%
C55	Two knights, Max Lange attack, Schlechter variation	2	100.0%	50.0%
C55	Two knights, Max Lange attack, Steinitz variation	4	25.0%	87.5%
A00	Van't Kruijs opening	14	42.9%	57.1%
C25	Vienna gambit	6	50.0%	58.3%
C29	Vienna gambit	19	21.1%	52.6%
C29	Vienna gambit, Breyer variation	25	44.0%	62.0%
C29	Vienna gambit, Kaufmann variation	4	25.0%	62.5%
C25	Vienna game	106	34.0%	56.6%
C26	Vienna game	55	32.7%	61.8%
C27	Vienna game	10	20.0%	40.0%
C28	Vienna game	80	41.3%	46.9%
C27	Vienna, Alekhine variation	4	25.0%	62.5%
C26	Vienna, Falkbeer variation	10	40.0%	40.0%
C26	Vienna, Mengarini variation	3	33.3%	16.7%
C25	Vienna, Paulsen variation	31	25.8%	67.7%
C26	Vienna, Paulsen-Mieses variation	98	37.8%	47.4%
C25	Vienna, Pierce gambit	3	100.0%	50.0%
C27	Vienna, `Frankenstein-Dracula' variation	1	0.0%	100.0%
A56	Vulture defence	1	100.0%	50.0%
B12	de Bruycker defence	3	0.0%	66.7%