CCRL 40/4

Opening statistics

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

ECO	Opening	Number of games	Draws	White score
A00	Amsterdam attack	3	0.0%	66.7%
A00	Benko's opening	597	32.2%	49.2%
A00	Benko's opening, reversed Alekhine	1	0.0%	0.0%
A00	Dunst (Sleipner, Heinrichsen) opening	62	25.8%	53.2%
A00	Lasker simul special	2	0.0%	100.0%
A00	Polish (Sokolsky) opening	119	31.1%	50.0%
A00	Polish, Outflank variation	11	9.1%	50.0%
A00	Saragossa opening	17	11.8%	64.7%
A00	Van't Kruijs opening	4	25.0%	37.5%
A00	Ware (Meadow Hay) opening	5	0.0%	40.0%
A01	Nimzovich-Larsen attack	7	0.0%	71.4%
A01	Nimzovich-Larsen attack, Dutch variation	1	0.0%	0.0%
A01	Nimzovich-Larsen attack, English variation	8	50.0%	37.5%
A01	Nimzovich-Larsen attack, Indian variation	20	35.0%	52.5%
A01	Nimzovich-Larsen attack, classical variation	36	30.6%	43.1%
A01	Nimzovich-Larsen attack, modern variation	114	36.0%	53.1%
A01	Nimzovich-Larsen attack, symmetrical variation	7	57.1%	57.1%
A02	Bird's opening	8	12.5%	81.3%
A03	Bird's opening	13	53.8%	50.0%
A03	Bird's opening, Williams gambit	2	50.0%	25.0%
A04	Reti opening	2742	29.8%	53.5%
A04	Reti v Dutch	232	31.0%	58.6%
A04	Reti, Lisitsin gambit deferred	4	0.0%	75.0%
A04	Reti, Pirc-Lisitsin gambit	17	47.1%	64.7%
A05	Reti opening	2031	31.6%	53.2%
A05	Reti, King's Indian attack	445	37.3%	54.4%
A05	Reti, King's Indian attack, Reti-Smyslov variation	23	39.1%	63.0%
A05	Reti, King's Indian attack, Spassky's variation	207	36.7%	54.6%
A06	Reti opening	686	27.6%	59.0%
A06	Reti, Nimzovich-Larsen attack	467	32.8%	51.3%
A06	Reti, old Indian attack	17	17.6%	44.1%
A06	Santasiere's folly	8	12.5%	43.8%
A07	Reti, King's Indian attack	197	31.5%	53.3%
A07	Reti, King's Indian attack (Barcza system)	1695	32.2%	51.4%
A07	Reti, King's Indian attack (with ...c5)	99	34.3%	52.5%
A07	Reti, King's Indian attack, Keres variation	205	37.6%	51.0%
A07	Reti, King's Indian attack, Pachman system	26	34.6%	51.9%
A07	Reti, King's Indian attack, Yugoslav variation	1717	31.6%	53.4%
A08	Reti, King's Indian attack	183	33.9%	57.4%
A08	Reti, King's Indian attack, French variation	548	33.9%	52.4%
A09	Reti accepted	85	31.8%	54.7%
A09	Reti accepted, Keres variation	32	18.8%	68.8%
A09	Reti opening	159	34.0%	54.1%
A09	Reti, advance variation	278	28.8%	47.5%
A10	English opening	967	30.8%	55.0%
A10	English, Adorjan defence	23	17.4%	56.5%
A10	English, Anglo-Dutch defense	240	34.6%	54.0%
A11	English, Caro-Kann defensive system	316	31.0%	52.8%
A12	English, Bled variation	12	33.3%	50.0%
A12	English, Capablanca's variation	29	34.5%	48.3%
A12	English, Caro-Kann defensive system	33	21.2%	68.2%
A12	English, Caro-Kann defensive system, Bogolyubov variation	29	27.6%	69.0%
A12	English, London defensive system	17	29.4%	38.2%
A12	English, New York (London) defensive system	9	33.3%	38.9%
A12	English, Torre defensive system	23	47.8%	41.3%
A13	English opening	1198	31.4%	54.0%
A13	English opening, Agincourt variation	659	34.4%	51.8%
A13	English, Kurajica defence	45	31.1%	37.8%
A13	English, Neo-Catalan	205	34.1%	52.2%
A13	English, Neo-Catalan accepted	399	34.6%	55.6%
A13	English, Romanishin gambit	60	40.0%	56.7%
A13	English, Wimpey system	42	16.7%	51.2%
A14	English, Neo-Catalan declined	297	37.4%	48.0%
A14	English, Symmetrical, Keres defence	369	35.0%	59.2%
A15	English opening	3101	32.3%	56.0%
A15	English, 1...Nf6 (Anglo-Indian defense)	294	31.0%	50.2%
A16	English opening	251	31.5%	54.4%
A16	English, Anglo-Gruenfeld defense	22	50.0%	52.3%
A16	English, Anglo-Gruenfeld defense, Korchnoi variation	2	50.0%	75.0%
A16	English, Anglo-Gruenfeld, Czech defense	15	40.0%	66.7%
A16	English, Anglo-Gruenfeld, Smyslov defense	13	46.2%	61.5%
A17	English opening	77	35.1%	52.6%
A17	English, Nimzo-English opening	479	32.6%	54.3%
A17	English, Queens Indian formation	66	25.8%	52.3%
A17	English, Queens Indian, Romanishin variation	10	30.0%	55.0%
A18	English, Mikenas-Carls variation	7	57.1%	71.4%
A18	English, Mikenas-Carls, Flohr variation	19	15.8%	76.3%
A18	English, Mikenas-Carls, Kevitz variation	3	0.0%	0.0%
A19	English, Mikenas-Carls, Sicilian variation	59	25.4%	55.1%
A20	English opening	2833	32.2%	55.2%
A20	English, Nimzovich variation	57	31.6%	59.6%
A20	English, Nimzovich, Flohr variation	139	33.1%	45.3%
A21	English opening	699	27.6%	54.3%
A21	English, Keres variation	2	50.0%	75.0%
A21	English, Kramnik-Shirov counterattack	417	32.6%	48.0%
A21	English, Smyslov defence	7	42.9%	50.0%
A21	English, Troeger defence	73	27.4%	53.4%
A22	English opening	202	32.2%	51.2%
A22	English, Bellon gambit	1	0.0%	100.0%
A22	English, Bremen, Smyslov system	816	34.3%	49.0%
A22	English, Bremen, reverse dragon	377	35.3%	51.1%
A22	English, Carls' Bremen system	119	28.6%	58.8%
A23	English, Bremen system, Keres variation	115	35.7%	53.5%
A24	English, Bremen system with ...g6	15	0.0%	66.7%
A25	English, Sicilian reversed	292	29.5%	52.4%
A25	English, closed system	614	29.3%	56.0%
A25	English, closed system (without ...d6)	73	30.1%	54.8%
A25	English, closed, 5.Rb1	277	33.9%	53.8%
A25	English, closed, 5.Rb1 Taimanov variation	3	33.3%	50.0%
A25	English, closed, Hort variation	18	16.7%	58.3%
A25	English, closed, Taimanov variation	12	33.3%	50.0%
A26	English, Botvinnik system	169	29.6%	51.5%
A26	English, closed system	158	29.1%	60.1%
A27	English, three knights system	129	31.8%	56.2%
A28	English, Bradley Beach variation	25	28.0%	46.0%
A28	English, Nenarokov variation	21	52.4%	45.2%
A28	English, four knights system	102	33.3%	49.0%
A28	English, four knights, 4.e3	267	36.3%	56.7%
A28	English, four knights, Capablanca variation	172	34.9%	51.2%
A28	English, four knights, Marini variation	320	30.9%	56.1%
A28	English, four knights, Nimzovich variation	108	41.7%	53.2%
A28	English, four knights, Romanishin variation	650	35.7%	51.8%
A28	English, four knights, Stean variation	76	36.8%	53.9%
A29	English, four knights, kingside fianchetto	5719	30.8%	51.3%
A30	English, symmetrical variation	2293	31.8%	52.9%
A30	English, symmetrical, hedgehog system	2228	31.8%	56.3%
A30	English, symmetrical, hedgehog, flexible formation	226	39.4%	55.5%
A31	English, symmetrical, Benoni formation	620	30.3%	54.8%
A32	English, symmetrical variation	126	29.4%	52.0%
A33	English, symmetrical variation	628	36.5%	51.4%
A33	English, symmetrical, Geller variation	637	26.7%	54.6%
A34	English, symmetrical variation	471	28.7%	53.8%
A34	English, symmetrical, Rubinstein system	86	38.4%	58.7%
A34	English, symmetrical, three knights system	506	36.8%	51.8%
A35	English, symmetrical variation	106	28.3%	55.7%
A35	English, symmetrical, four knights system	1274	30.8%	54.2%
A36	English, symmetrical variation	38	10.5%	65.8%
A36	English, symmetrical, Botvinnik system	37	29.7%	52.7%
A36	English, symmetrical, Botvinnik system reversed	35	31.4%	58.6%
A36	English, ultra-symmetrical variation	364	31.9%	51.9%
A37	English, symmetrical variation	209	25.8%	54.5%
A37	English, symmetrical, Botvinnik system reversed	208	30.3%	55.0%
A38	English, symmetrical variation	259	34.0%	52.9%
A38	English, symmetrical, main line with b3	6	33.3%	50.0%
A38	English, symmetrical, main line with d3	30	33.3%	50.0%
A39	English, symmetrical, main line with d4	201	29.9%	53.2%
A40	Beefeater defence	40	32.5%	68.8%
A40	Modern defence	348	35.6%	54.0%
A40	Queen's pawn	2046	31.7%	55.3%
A40	Queen's pawn, English defence	4	50.0%	50.0%
A40	Queen's pawn, Franco-Indian (Keres) defence	430	31.9%	54.8%
A40	Queen's pawn, Keres defence	679	28.6%	55.7%
A40	Queen's pawn, Lundin (Kevitz-Mikenas) defence	46	28.3%	59.8%
A41	Modern defence	24	33.3%	45.8%
A41	Old Indian defence	197	26.9%	55.1%
A41	Old Indian, Tartakower (Wade) variation	539	31.2%	58.3%
A41	Queen's Pawn	1041	31.0%	56.2%
A41	Robatsch defence, Rossolimo variation	44	36.4%	50.0%
A42	Modern defence, Averbakh system	140	32.9%	55.7%
A42	Modern defence, Averbakh system, Kotov variation	13	46.2%	61.5%
A42	Pterodactyl defence	922	28.0%	61.5%
A43	Old Benoni defence	598	31.1%	58.7%
A43	Old Benoni, Franco-Benoni defence	23	39.1%	50.0%
A43	Old Benoni, Mujannah formation	20	20.0%	70.0%
A43	Old Benoni, Schmid's system	1	100.0%	50.0%
A44	Old Benoni defence	5	60.0%	50.0%
A44	Semi-Benoni (`blockade variation')	8	37.5%	31.3%
A45	Blackmar-Diemer gambit	35	28.6%	54.3%
A45	Paleface attack	4	25.0%	37.5%
A45	Queen's pawn game	1243	28.2%	52.9%
A45	Trompovsky attack (Ruth, Opovcensky opening)	966	28.9%	50.4%
A46	Queen's pawn game	1526	29.6%	57.0%
A46	Queen's pawn, Torre attack	469	27.1%	52.3%
A46	Queen's pawn, Torre attack, Wagner gambit	4	25.0%	37.5%
A46	Queen's pawn, Yusupov-Rubinstein system	268	33.6%	55.6%
A47	Queen's Indian defence	307	29.6%	54.6%
A47	Queen's Indian, Marienbad system	40	20.0%	37.5%
A47	Queen's Indian, Marienbad system, Berg variation	2	50.0%	25.0%
A48	King's Indian, East Indian defence	477	31.9%	49.1%
A48	King's Indian, London system	237	27.0%	56.1%
A48	King's Indian, Torre attack	599	34.1%	50.6%
A49	King's Indian, fianchetto without c4	585	29.4%	52.6%
A50	Kevitz-Trajkovich defence	451	30.4%	49.3%
A50	Queen's Indian accelerated	60	23.3%	63.3%
A50	Queen's pawn game	238	25.6%	53.2%
A51	Budapest, Fajarowicz variation	3	0.0%	66.7%
A52	Budapest defence	2	0.0%	50.0%
A52	Budapest, Adler variation	11	45.5%	68.2%
A52	Budapest, Rubinstein variation	10	20.0%	80.0%
A53	Old Indian defence	508	31.3%	59.2%
A53	Old Indian, Janowski variation	36	16.7%	58.3%
A54	Old Indian, Ukrainian variation	26	30.8%	61.5%
A54	Old Indian, Ukrainian variation, 4.Nf3	79	21.5%	56.3%
A55	Old Indian, main line	288	31.3%	61.1%
A56	Benoni defence	688	28.1%	63.0%
A56	Benoni defence, Hromodka system	491	20.4%	53.6%
A56	Czech Benoni defence	133	22.6%	71.4%
A56	Czech Benoni, King's Indian system	25	40.0%	68.0%
A57	Benko gambit	291	25.4%	59.1%
A57	Benko gambit half accepted	646	31.0%	57.1%
A57	Benko gambit, Nescafe Frappe attack	2	50.0%	25.0%
A57	Benko gambit, Zaitsev system	39	25.6%	53.8%
A58	Benko gambit accepted	551	30.9%	57.5%
A58	Benko gambit, Nd2 variation	6	0.0%	50.0%
A58	Benko gambit, fianchetto variation	281	23.1%	59.6%
A59	Benko gambit	25	36.0%	62.0%
A59	Benko gambit, 7.e4	9	55.6%	61.1%
A59	Benko gambit, Ne2 variation	12	33.3%	58.3%
A59	Benko gambit, main line	360	32.8%	58.1%
A60	Benoni defence	90	33.3%	57.8%
A61	Benoni defence	397	28.0%	59.6%
A61	Benoni, Nimzovich (knight's tour) variation	345	25.5%	63.2%
A61	Benoni, Uhlmann variation	50	26.0%	57.0%
A61	Benoni, fianchetto variation	8	37.5%	68.8%
A62	Benoni, fianchetto variation	226	26.5%	59.3%
A63	Benoni, fianchetto, 9...Nbd7	35	34.3%	62.9%
A64	Benoni, fianchetto, 11...Re8	139	25.2%	56.5%
A65	Benoni, 6.e4	42	26.2%	51.2%
A66	Benoni, pawn storm variation	5	40.0%	60.0%
A67	Benoni, Taimanov variation	32	28.1%	57.8%
A68	Benoni, four pawns attack	2	0.0%	50.0%
A69	Benoni, four pawns attack, main line	48	35.4%	34.4%
A70	Benoni, classical with e4 and Nf3	574	29.8%	60.0%
A71	Benoni, classical, 8.Bg5	85	25.9%	58.8%
A72	Benoni, classical without 9.O-O	67	28.4%	61.9%
A73	Benoni, classical, 9.O-O	25	32.0%	48.0%
A74	Benoni, classical, 9...a6, 10.a4	6	16.7%	91.7%
A75	Benoni, classical with ...a6 and 10...Bg4	57	29.8%	53.5%
A76	Benoni, classical, 9...Re8	29	20.7%	62.1%
A77	Benoni, classical, 9...Re8, 10.Nd2	191	25.7%	49.0%
A78	Benoni, classical with ...Re8 and ...Na6	43	34.9%	54.7%
A79	Benoni, classical, 11.f3	153	23.5%	66.7%
A80	Dutch	1374	31.2%	55.2%
A80	Dutch, 2.Bg5 variation	316	28.8%	50.2%
A80	Dutch, Korchnoi attack	3	33.3%	16.7%
A80	Dutch, Krejcik gambit	5	60.0%	50.0%
A80	Dutch, Manhattan (Alapin, Ulvestad) variation	9	11.1%	16.7%
A81	Dutch defence	2654	31.2%	58.7%
A81	Dutch defence, Blackburne variation	21	28.6%	61.9%
A81	Dutch, Leningrad, Karlsbad variation	2	0.0%	50.0%
A82	Dutch, Staunton gambit	12	33.3%	50.0%
A82	Dutch, Staunton gambit, Tartakower variation	2	50.0%	75.0%
A83	Dutch, Staunton gambit, Alekhine variation	1	0.0%	100.0%
A83	Dutch, Staunton gambit, Chigorin variation	14	57.1%	57.1%
A83	Dutch, Staunton gambit, Lasker variation	3	0.0%	66.7%
A83	Dutch, Staunton gambit, Nimzovich variation	1	0.0%	100.0%
A83	Dutch, Staunton gambit, Staunton's line	43	34.9%	54.7%
A84	Dutch defence	498	30.3%	59.5%
A84	Dutch defence, Rubinstein variation	278	27.0%	58.8%
A84	Dutch, Staunton gambit deferred	5	40.0%	20.0%
A85	Dutch with c4 & Nc3	114	38.6%	56.1%
A86	Dutch with c4 & g3	26	34.6%	59.6%
A86	Dutch, Leningrad variation	34	29.4%	52.9%
A87	Dutch, Leningrad, main variation	386	28.5%	58.5%
A88	Dutch, Leningrad, main variation with c6	619	36.0%	58.2%
A89	Dutch, Leningrad, main variation with Nc6	494	28.7%	59.7%
A90	Dutch defence	782	25.6%	57.3%
A90	Dutch defence, Dutch-Indian (Nimzo-Dutch) variation	162	32.7%	63.3%
A90	Dutch-Indian, Alekhine variation	50	34.0%	49.0%
A91	Dutch defence	53	22.6%	60.4%
A92	Dutch defence	25	36.0%	62.0%
A92	Dutch defence, Alekhine variation	45	40.0%	62.2%
A92	Dutch, stonewall variation	57	29.8%	57.0%
A92	Dutch, stonewall with Nc3	3	0.0%	66.7%
A93	Dutch, stonewall, Botwinnik variation	113	24.8%	58.4%
A94	Dutch, stonewall with Ba3	69	37.7%	55.1%
A95	Dutch, stonewall with Nc3	151	30.5%	51.0%
A95	Dutch, stonewall: Chekhover variation	28	21.4%	67.9%
A96	Dutch, classical variation	173	28.3%	63.9%
A97	Dutch, Ilyin-Genevsky variation	10	20.0%	60.0%
A97	Dutch, Ilyin-Genevsky, Winter variation	81	44.4%	63.0%
A98	Dutch, Ilyin-Genevsky variation with Qc2	60	31.7%	67.5%
A99	Dutch, Ilyin-Genevsky variation with b3	174	30.5%	65.2%
B00	KP, Colorado counter	4	25.0%	37.5%
B00	KP, Nimzovich defence	226	19.9%	63.5%
B00	KP, Nimzovich defence, Bogolyubov variation	14	14.3%	57.1%
B00	King's pawn opening	259	30.9%	60.2%
B00	Owen defence	78	33.3%	57.7%
B00	Reversed Grob (Borg/Basman defence/macho Grob)	5	0.0%	100.0%
B00	St. George (Baker) defence	2	0.0%	100.0%
B01	Scandinavian (centre counter) defence	870	28.0%	65.2%
B01	Scandinavian defence	275	29.1%	46.5%
B01	Scandinavian defence, Gruenfeld variation	12	33.3%	58.3%
B01	Scandinavian defence, Lasker variation	39	33.3%	67.9%
B01	Scandinavian gambit	38	44.7%	51.3%
B01	Scandinavian, Icelandic gambit	19	52.6%	68.4%
B01	Scandinavian, Kiel variation	2	50.0%	25.0%
B01	Scandinavian, Marshall variation	175	36.0%	58.6%
B01	Scandinavian, Mieses-Kotrvc gambit	1	0.0%	0.0%
B01	Scandinavian, Pytel-Wade variation	171	34.5%	60.5%
B01	Scandinavian, Richter variation	2	50.0%	25.0%
B02	Alekhine's defence	38	36.8%	63.2%
B02	Alekhine's defence, Brooklyn defence	1	0.0%	100.0%
B02	Alekhine's defence, Kmoch variation	1	0.0%	100.0%
B02	Alekhine's defence, Krejcik variation	4	75.0%	37.5%
B02	Alekhine's defence, Maroczy variation	11	54.5%	45.5%
B02	Alekhine's defence, Saemisch attack	27	25.9%	53.7%
B02	Alekhine's defence, Scandinavian variation	39	28.2%	55.1%
B02	Alekhine's defence, Spielmann variation	3	0.0%	66.7%
B02	Alekhine's defence, Two pawns' (Lasker's) attack	26	30.8%	50.0%
B02	Alekhine's defence, Welling variation	4	0.0%	25.0%
B03	Alekhine's defence	292	21.9%	49.0%
B03	Alekhine's defence, Balogh variation	13	23.1%	50.0%
B03	Alekhine's defence, O'Sullivan gambit	1	100.0%	50.0%
B03	Alekhine's defence, exchange variation	253	31.2%	61.9%
B03	Alekhine's defence, exchange, Karpov variation	3	33.3%	50.0%
B03	Alekhine's defence, four pawns attack	10	10.0%	75.0%
B03	Alekhine's defence, four pawns attack, 6...Nc6	1	0.0%	100.0%
B03	Alekhine's defence, four pawns attack, 7.Be3	31	35.5%	69.4%
B03	Alekhine's defence, four pawns attack, Ilyin-Genevsky var.	1	0.0%	0.0%
B03	Alekhine's defence, four pawns attack, Trifunovic variation	2	0.0%	100.0%
B03	Alekhine's defence, four pawns attack, fianchetto variation	8	37.5%	68.8%
B04	Alekhine's defence, modern variation	99	26.3%	60.6%
B04	Alekhine's defence, modern, Keres variation	50	38.0%	63.0%
B04	Alekhine's defence, modern, Larsen variation	261	31.4%	59.8%
B04	Alekhine's defence, modern, Schmid variation	102	27.5%	63.7%
B04	Alekhine's defence, modern, fianchetto variation	197	36.5%	61.4%
B05	Alekhine's defence, modern variation, 4...Bg4	176	29.5%	63.6%
B05	Alekhine's defence, modern, Alekhine variation	1	100.0%	50.0%
B05	Alekhine's defence, modern, Flohr variation	64	40.6%	60.9%
B05	Alekhine's defence, modern, Panov variation	2	50.0%	75.0%
B06	Robatsch (modern) defence	3280	31.8%	56.2%
B06	Robatsch defence	485	27.2%	58.8%
B06	Robatsch defence, Gurgenidze variation	53	26.4%	58.5%
B06	Robatsch defence, Pseudo-Austrian attack	311	24.4%	61.4%
B06	Robatsch defence, Two knights variation	449	29.2%	58.2%
B06	Robatsch defence, Two knights, Suttles variation	2016	35.0%	60.2%
B06	Robatsch defence, three pawns attack	10	30.0%	45.0%
B07	Pirc defence	410	29.3%	52.7%
B07	Pirc, 150 attack	143	32.2%	62.2%
B07	Pirc, Byrne variation	106	25.5%	58.0%
B07	Pirc, Holmov system	8	37.5%	43.8%
B07	Pirc, Sveshnikov system	124	29.8%	55.2%
B07	Pirc, Ufimtsev-Pytel variation	219	29.7%	56.4%
B07	Pirc, bayonet (Mariotti) attack	16	18.8%	78.1%
B07	Robatsch defence, Geller's system	488	34.6%	56.0%
B08	Pirc, classical (two knights) system	174	32.8%	54.3%
B08	Pirc, classical system, 5.Be2	1021	34.2%	57.4%
B08	Pirc, classical, h3 system	172	36.0%	55.8%
B09	Pirc, Austrian attack	136	32.4%	56.6%
B09	Pirc, Austrian attack, 6.Bd3	926	34.9%	61.5%
B09	Pirc, Austrian attack, 6.Be3	169	30.8%	55.6%
B09	Pirc, Austrian attack, 6.e5	85	36.5%	54.7%
B09	Pirc, Austrian attack, Ljubojevic variation	2	0.0%	100.0%
B09	Pirc, Austrian attack, dragon formation	324	42.6%	59.0%
B10	Caro-Kann defence	1021	26.0%	52.9%
B10	Caro-Kann, Goldman (Spielmann) variation	8	12.5%	68.8%
B10	Caro-Kann, Two knights variation	113	27.4%	58.0%
B10	Caro-Kann, anti-Caro-Kann defence	348	28.4%	56.8%
B10	Caro-Kann, anti-anti-Caro-Kann defence	580	44.8%	52.6%
B10	Caro-Kann, closed (Breyer) variation	106	27.4%	52.4%
B11	Caro-Kann, Two knights, 3...Bg4	162	33.3%	53.1%
B12	Caro-Kann defence	119	29.4%	54.2%
B12	Caro-Kann, 3.Nd2	144	22.2%	56.9%
B12	Caro-Kann, Edinburgh variation	28	21.4%	67.9%
B12	Caro-Kann, Tartakower (fantasy) variation	205	34.1%	50.7%
B12	Caro-Kann, advance variation	2946	28.4%	55.3%
B12	Caro-Kann, advance, Short variation	9	11.1%	61.1%
B12	de Bruycker defence	5	20.0%	30.0%
B13	Caro-Kann, Panov-Botvinnik attack	278	32.0%	54.5%
B13	Caro-Kann, Panov-Botvinnik, Czerniak variation	11	18.2%	45.5%
B13	Caro-Kann, Panov-Botvinnik, Gunderam attack	2	0.0%	100.0%
B13	Caro-Kann, Panov-Botvinnik, Herzog defence	9	22.2%	44.4%
B13	Caro-Kann, Panov-Botvinnik, Reifir (Spielmann) variation	2	0.0%	100.0%
B13	Caro-Kann, Panov-Botvinnik, normal variation	72	44.4%	55.6%
B13	Caro-Kann, exchange variation	272	26.8%	50.9%
B13	Caro-Kann, exchange, Rubinstein variation	45	42.2%	63.3%
B14	Caro-Kann, Panov-Botvinnik attack, 5...e6	1202	34.9%	54.8%
B14	Caro-Kann, Panov-Botvinnik attack, 5...g6	124	41.1%	60.1%
B15	Caro-Kann defence	125	28.0%	45.2%
B15	Caro-Kann, Alekhine gambit	4	50.0%	50.0%
B15	Caro-Kann, Forgacs variation	28	42.9%	46.4%
B15	Caro-Kann, Gurgenidze system	145	34.5%	55.2%
B15	Caro-Kann, Rasa-Studier gambit	3	66.7%	66.7%
B15	Caro-Kann, Tartakower (Nimzovich) variation	51	19.6%	58.8%
B16	Caro-Kann, Bronstein-Larsen variation	113	23.0%	69.9%
B17	Caro-Kann, Steinitz variation	2338	29.9%	53.1%
B18	Caro-Kann, classical variation	249	26.9%	54.0%
B18	Caro-Kann, classical, 6.h4	360	29.7%	56.0%
B18	Caro-Kann, classical, Flohr variation	25	40.0%	52.0%
B18	Caro-Kann, classical, Maroczy attack	6	33.3%	66.7%
B19	Caro-Kann, classical, 7...Nd7	71	28.2%	50.7%
B19	Caro-Kann, classical, Spassky variation	3194	29.2%	57.2%
B20	Sicilian defence	812	26.7%	49.0%
B20	Sicilian, Gloria variation	1	0.0%	0.0%
B20	Sicilian, Keres variation (2.Ne2)	106	26.4%	49.1%
B20	Sicilian, Steinitz variation	205	31.2%	52.7%
B20	Sicilian, wing gambit	4	25.0%	37.5%
B20	Sicilian, wing gambit, Carlsbad variation	1	0.0%	0.0%
B20	Sicilian, wing gambit, Marshall variation	1	100.0%	50.0%
B21	Sicilian, Andreaschek gambit	2	0.0%	50.0%
B21	Sicilian, Grand Prix attack	287	34.8%	53.3%
B21	Sicilian, Smith-Morra gambit	59	23.7%	47.5%
B22	Sicilian, 2.c3, Heidenfeld variation	23	30.4%	41.3%
B22	Sicilian, Alapin's variation (2.c3)	3260	36.8%	53.2%
B23	Sicilian, Grand Prix attack	184	32.6%	52.2%
B23	Sicilian, Grand Prix attack, Schofman variation	13	46.2%	46.2%
B23	Sicilian, chameleon variation	113	35.4%	58.4%
B23	Sicilian, closed	746	26.7%	49.9%
B23	Sicilian, closed, 2...Nc6	637	30.6%	54.7%
B23	Sicilian, closed, Korchnoi variation	30	36.7%	38.3%
B24	Sicilian, closed	169	25.4%	47.6%
B24	Sicilian, closed, Smyslov variation	4	50.0%	75.0%
B25	Sicilian, closed	39	25.6%	61.5%
B25	Sicilian, closed, 6.Ne2 e5 (Botvinnik)	13	23.1%	26.9%
B25	Sicilian, closed, 6.f4	225	25.3%	48.2%
B25	Sicilian, closed, 6.f4 e5 (Botvinnik)	37	24.3%	52.7%
B26	Sicilian, closed, 6.Be3	259	24.7%	45.9%
B27	Sicilian defence	12	33.3%	75.0%
B27	Sicilian, Hungarian variation	9495	34.7%	57.3%
B27	Sicilian, Katalimov variation	28	35.7%	53.6%
B27	Sicilian, Quinteros variation	1	0.0%	100.0%
B28	Sicilian, O'Kelly variation	85	38.8%	52.4%
B29	Sicilian, Nimzovich-Rubinstein variation	48	25.0%	62.5%
B29	Sicilian, Nimzovich-Rubinstein; Rubinstein counter-gambit	23	21.7%	54.3%
B30	Sicilian defence	1003	31.7%	52.3%
B30	Sicilian, Nimzovich-Rossolimo attack (without ...d6)	2159	29.6%	54.1%
B31	Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6)	1952	31.3%	53.5%
B31	Sicilian, Nimzovich-Rossolimo attack, Gurgenidze variation	9	33.3%	50.0%
B32	Sicilian defence	445	32.6%	47.5%
B32	Sicilian, Flohr variation	47	34.0%	48.9%
B32	Sicilian, Labourdonnais-Loewenthal (Kalashnikov) variation	581	36.3%	57.6%
B32	Sicilian, Labourdonnais-Loewenthal variation	146	26.7%	59.9%
B32	Sicilian, Nimzovich variation	5	20.0%	70.0%
B33	Sicilian defence	432	31.0%	49.3%
B33	Sicilian, Pelikan (Lasker/Sveshnikov) variation	338	34.6%	55.2%
B33	Sicilian, Pelikan, Bird variation	62	32.3%	61.3%
B33	Sicilian, Pelikan, Chelyabinsk variation	3219	29.4%	55.4%
B33	Sicilian, Sveshnikov variation	2239	25.6%	52.9%
B34	Sicilian, accelerated fianchetto, exchange variation	3	100.0%	50.0%
B34	Sicilian, accelerated fianchetto, modern variation	286	38.1%	53.3%
B35	Sicilian, accelerated fianchetto, modern variation with Bc4	2494	37.0%	52.7%
B36	Sicilian, accelerated fianchetto, Gurgenidze variation	221	40.3%	55.9%
B36	Sicilian, accelerated fianchetto, Maroczy bind	817	40.0%	57.1%
B37	Sicilian, accelerated fianchetto, Maroczy bind, 5...Bg7	193	38.9%	54.1%
B37	Sicilian, accelerated fianchetto, Simagin variation	8	25.0%	50.0%
B38	Sicilian, accelerated fianchetto, Maroczy bind, 6.Be3	2426	41.8%	55.5%
B39	Sicilian, accelerated fianchetto, Breyer variation	1276	32.8%	62.6%
B40	Sicilian defence	2845	32.2%	52.9%
B40	Sicilian, Anderssen variation	488	33.8%	53.4%
B40	Sicilian, Pin variation (Sicilian counter-attack)	7	14.3%	50.0%
B40	Sicilian, Pin, Koch variation	13	38.5%	57.7%
B41	Sicilian, Kan variation	125	29.6%	48.4%
B41	Sicilian, Kan, Maroczy bind (Reti variation)	172	30.8%	52.0%
B41	Sicilian, Kan, Maroczy bind - Bronstein variation	10	50.0%	65.0%
B42	Sicilian, Kan, 5.Bd3	3384	29.7%	56.8%
B42	Sicilian, Kan, Gipslis variation	175	32.0%	56.6%
B42	Sicilian, Kan, Polugaievsky variation	1832	27.5%	54.0%
B42	Sicilian, Kan, Swiss cheese variation	194	30.4%	55.4%
B43	Sicilian, Kan, 5.Nc3	2771	31.4%	52.9%
B44	Sicilian defence	234	32.5%	53.0%
B44	Sicilian, Szen (`anti-Taimanov') variation	372	33.1%	52.3%
B44	Sicilian, Szen variation, Dely-Kasparov gambit	4	25.0%	62.5%
B44	Sicilian, Szen, hedgehog variation	426	31.5%	44.6%
B45	Sicilian, Taimanov variation	1100	30.1%	55.8%
B45	Sicilian, Taimanov, American attack	8	25.0%	62.5%
B46	Sicilian, Taimanov variation	2898	31.8%	55.1%
B47	Sicilian, Taimanov (Bastrikov) variation	6627	31.9%	54.2%
B48	Sicilian, Taimanov variation	2592	30.5%	50.5%
B49	Sicilian, Taimanov variation	735	34.1%	53.8%
B50	Sicilian	1291	30.2%	52.4%
B51	Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack	772	33.8%	53.8%
B52	Sicilian, Canal-Sokolsky attack, 3...Bd7	484	34.5%	51.5%
B52	Sicilian, Canal-Sokolsky attack, Bronstein gambit	156	30.1%	44.6%
B52	Sicilian, Canal-Sokolsky attack, Sokolsky variation	358	41.9%	56.7%
B53	Sicilian, Chekhover variation	265	38.1%	48.5%
B53	Sicilian, Chekhover, Zaitsev variation	12	8.3%	54.2%
B54	Sicilian	527	30.6%	56.5%
B54	Sicilian, Prins (Moscow) variation	270	31.9%	51.5%
B55	Sicilian, Prins variation, Venice attack	26	26.9%	55.8%
B56	Sicilian	1277	28.8%	53.0%
B56	Sicilian, Venice attack	31	32.3%	61.3%
B57	Sicilian, Magnus Smith trap	14	21.4%	60.7%
B57	Sicilian, Sozin, Benko variation	1885	32.8%	49.5%
B57	Sicilian, Sozin, not Scheveningen	172	36.0%	55.8%
B58	Sicilian, Boleslavsky variation	596	32.6%	50.8%
B58	Sicilian, Boleslavsky, Louma variation	9	33.3%	38.9%
B58	Sicilian, classical	173	36.4%	46.5%
B59	Sicilian, Boleslavsky variation, 7.Nb3	73	41.1%	52.1%
B60	Sicilian, Richter-Rauzer	200	28.5%	55.3%
B60	Sicilian, Richter-Rauzer, Bondarevsky variation	9	11.1%	61.1%
B60	Sicilian, Richter-Rauzer, Larsen variation	100	29.0%	49.5%
B61	Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2	310	29.7%	60.6%
B62	Sicilian, Richter-Rauzer, 6...e6	38	21.1%	36.8%
B62	Sicilian, Richter-Rauzer, Keres variation	53	18.9%	50.9%
B62	Sicilian, Richter-Rauzer, Margate (Alekhine) variation	41	22.0%	50.0%
B62	Sicilian, Richter-Rauzer, Podvebrady variation	13	23.1%	42.3%
B63	Sicilian, Richter-Rauzer, Rauzer attack	130	35.4%	56.9%
B63	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7	954	24.9%	52.5%
B64	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9.f4	655	30.7%	54.0%
B64	Sicilian, Richter-Rauzer, Rauzer attack, Geller variation	9	11.1%	83.3%
B65	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9...Nxd4	1059	32.5%	54.5%
B66	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6	12481	26.0%	50.6%
B67	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 8...Bd7	5543	25.5%	52.5%
B68	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 9...Be7	150	28.0%	47.3%
B69	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 11.Bxf6	708	22.7%	56.4%
B70	Sicilian, dragon variation	295	30.2%	47.3%
B71	Sicilian, dragon, Levenfish variation	17	41.2%	50.0%
B71	Sicilian, dragon, Levenfish; Flohr variation	3	66.7%	33.3%
B72	Sicilian, dragon, 6.Be3	24	20.8%	52.1%
B72	Sicilian, dragon, classical attack	9	33.3%	61.1%
B72	Sicilian, dragon, classical, Amsterdam variation	4	25.0%	62.5%
B72	Sicilian, dragon, classical, Grigoriev variation	8	37.5%	56.3%
B72	Sicilian, dragon, classical, Nottingham variation	22	18.2%	40.9%
B73	Sicilian, dragon, classical, 8.O-O	43	30.2%	64.0%
B73	Sicilian, dragon, classical, Richter variation	123	39.0%	49.6%
B73	Sicilian, dragon, classical, Zollner gambit	1	0.0%	0.0%
B74	Sicilian, dragon, classical, 9.Nb3	133	36.1%	54.1%
B74	Sicilian, dragon, classical, Alekhine variation	19	0.0%	63.2%
B74	Sicilian, dragon, classical, Reti-Tartakower variation	160	34.4%	54.7%
B74	Sicilian, dragon, classical, Spielmann variation	64	35.9%	53.9%
B75	Sicilian, dragon, Yugoslav attack	108	34.3%	59.7%
B76	Sicilian, dragon, Yugoslav attack, 7...O-O	210	30.0%	40.7%
B76	Sicilian, dragon, Yugoslav attack, Rauser variation	761	26.4%	56.8%
B77	Sicilian, dragon, Yugoslav attack, 9...Bd7	385	25.5%	54.3%
B77	Sicilian, dragon, Yugoslav attack, 9.Bc4	55	20.0%	64.5%
B77	Sicilian, dragon, Yugoslav attack, Byrne variation	5	20.0%	50.0%
B78	Sicilian, dragon, Yugoslav attack, 10.O-O-O	669	24.4%	52.4%
B79	Sicilian, dragon, Yugoslav attack, 12.h4	136	28.7%	65.8%
B80	Sicilian, Scheveningen variation	863	24.3%	54.1%
B80	Sicilian, Scheveningen, English variation	319	23.2%	53.0%
B80	Sicilian, Scheveningen, Vitolins variation	21	9.5%	47.6%
B80	Sicilian, Scheveningen, fianchetto variation	266	35.3%	53.0%
B81	Sicilian, Scheveningen, Keres attack	3369	26.2%	58.9%
B82	Sicilian, Scheveningen, 6.f4	583	28.5%	54.4%
B82	Sicilian, Scheveningen, Tal variation	68	25.0%	52.2%
B83	Sicilian, Scheveningen, 6.Be2	418	32.5%	49.5%
B83	Sicilian, modern Scheveningen	342	31.0%	51.2%
B83	Sicilian, modern Scheveningen, main line	536	34.5%	51.4%
B83	Sicilian, modern Scheveningen, main line with Nb3	148	25.0%	47.6%
B84	Sicilian, Scheveningen (Paulsen), classical variation	4761	29.6%	52.0%
B84	Sicilian, Scheveningen, classical, Nd7 system	40	22.5%	51.3%
B85	Sicilian, Scheveningen, classical	172	37.8%	53.2%
B85	Sicilian, Scheveningen, classical main line	500	38.4%	52.8%
B85	Sicilian, Scheveningen, classical variation with ...Qc7 and ...Nc6	5	40.0%	40.0%
B85	Sicilian, Scheveningen, classical, Maroczy system	86	31.4%	54.1%
B86	Sicilian, Sozin attack	98	21.4%	45.4%
B87	Sicilian, Sozin with ...a6 and ...b5	1213	29.4%	49.8%
B88	Sicilian, Sozin, Fischer variation	32	28.1%	54.7%
B88	Sicilian, Sozin, Leonhardt variation	266	35.0%	51.7%
B89	Sicilian, Sozin, 7.Be3	1449	28.2%	50.2%
B89	Sicilian, Velimirovic attack	1123	22.2%	50.2%
B90	Sicilian, Najdorf	1533	26.0%	51.9%
B90	Sicilian, Najdorf, Adams attack	61	29.5%	60.7%
B90	Sicilian, Najdorf, Byrne (English) attack	15470	23.6%	53.3%
B90	Sicilian, Najdorf, Lipnitzky attack	954	28.6%	45.8%
B91	Sicilian, Najdorf, Zagreb (fianchetto) variation	329	28.0%	53.2%
B92	Sicilian, Najdorf, Opovcensky variation	4354	31.9%	52.7%
B93	Sicilian, Najdorf, 6.f4	1641	31.0%	50.2%
B94	Sicilian, Najdorf, 6.Bg5	121	25.6%	43.4%
B95	Sicilian, Najdorf, 6...e6	166	28.3%	47.9%
B96	Sicilian, Najdorf, 7.f4	335	30.1%	51.5%
B96	Sicilian, Najdorf, Polugayevsky variation	66	28.8%	55.3%
B96	Sicilian, Najdorf, Polugayevsky, Simagin variation	18	33.3%	50.0%
B97	Sicilian, Najdorf, 7...Qb6	1324	23.9%	43.8%
B97	Sicilian, Najdorf, Poisoned pawn variation	1980	34.9%	47.0%
B98	Sicilian, Najdorf variation	86	26.7%	45.9%
B98	Sicilian, Najdorf, 7...Be7	30	23.3%	65.0%
B98	Sicilian, Najdorf, Browne variation	47	44.7%	60.6%
B98	Sicilian, Najdorf, Goteborg (Argentine) variation	5	20.0%	30.0%
B99	Sicilian, Najdorf, 7...Be7 main line	1981	20.3%	55.3%
C00	French defence	424	26.2%	53.2%
C00	French defence, Steiner variation	266	32.7%	46.4%
C00	French, Alapin variation	3	66.7%	66.7%
C00	French, Chigorin variation	581	28.6%	53.4%
C00	French, King's Indian attack	2299	34.8%	52.9%
C00	French, Labourdonnais variation	220	35.0%	51.1%
C00	French, Pelikan variation	14	42.9%	50.0%
C00	French, Reti (Spielmann) variation	20	35.0%	52.5%
C00	French, Reversed Philidor formation	27	29.6%	40.7%
C00	French, Schlechter variation	203	36.0%	53.0%
C00	French, Two knights variation	33	21.2%	31.8%
C00	French, Wing gambit	7	28.6%	85.7%
C00	St. George defence	13	7.7%	57.7%
C01	French, exchange variation	686	34.7%	54.2%
C01	French, exchange, Svenonius variation	28	21.4%	60.7%
C02	French, advance variation	593	28.3%	54.8%
C02	French, advance, Euwe variation	551	22.9%	50.5%
C02	French, advance, Milner-Barry gambit	15	13.3%	73.3%
C02	French, advance, Nimzovich system	196	15.3%	44.9%
C02	French, advance, Paulsen attack	685	24.4%	55.1%
C02	French, advance, Steinitz variation	193	30.1%	48.2%
C02	French, advance, Wade variation	156	21.2%	55.4%
C03	French, Tarrasch	756	35.3%	55.4%
C03	French, Tarrasch, Guimard variation	37	35.1%	58.1%
C04	French, Tarrasch, Guimard main line	112	18.8%	56.7%
C05	French, Tarrasch, Botvinnik variation	74	31.1%	57.4%
C05	French, Tarrasch, closed variation	804	25.6%	58.6%
C06	French, Tarrasch, Leningrad variation	11	18.2%	72.7%
C06	French, Tarrasch, closed variation, main line	1842	32.6%	56.5%
C07	French, Tarrasch, Eliskases variation	11	45.5%	59.1%
C07	French, Tarrasch, open variation	2085	36.8%	51.9%
C08	French, Tarrasch, open, 4.ed ed	1115	37.0%	52.8%
C09	French, Tarrasch, open variation, main line	1503	38.1%	56.1%
C10	French, Fort Knox variation	152	31.6%	59.9%
C10	French, Frere (Becker) variation	18	27.8%	52.8%
C10	French, Paulsen variation	387	25.6%	58.5%
C10	French, Rubinstein variation	633	32.2%	51.8%
C11	French defence	100	37.0%	52.5%
C11	French, Burn variation	3667	30.1%	53.2%
C11	French, Henneberger variation	23	34.8%	34.8%
C11	French, Steinitz variation	413	27.6%	50.4%
C11	French, Steinitz, Boleslavsky variation	1622	28.4%	54.4%
C11	French, Steinitz, Bradford attack	2	0.0%	50.0%
C11	French, Steinitz, Gledhill attack	5	60.0%	50.0%
C11	French, Swiss variation	35	28.6%	48.6%
C12	French, MacCutcheon variation	70	38.6%	43.6%
C12	French, MacCutcheon, Bogolyubov variation	7	28.6%	71.4%
C12	French, MacCutcheon, Dr. Olland (Dutch) variation	16	6.3%	53.1%
C12	French, MacCutcheon, Duras variation	3	66.7%	66.7%
C12	French, MacCutcheon, Grigoriev variation	3	0.0%	0.0%
C12	French, MacCutcheon, Janowski variation	51	25.5%	57.8%
C12	French, MacCutcheon, Lasker variation	136	23.5%	58.1%
C12	French, MacCutcheon, Lasker variation, 8...g6	466	26.0%	51.8%
C12	French, MacCutcheon, Tartakower variation	1	100.0%	50.0%
C12	French, MacCutcheon, advance variation	2	50.0%	75.0%
C13	French, Albin-Alekhine-Chatard attack	34	35.3%	73.5%
C13	French, Albin-Alekhine-Chatard attack, Breyer variation	29	51.7%	50.0%
C13	French, Albin-Alekhine-Chatard attack, Maroczy variation	2	0.0%	100.0%
C13	French, Albin-Alekhine-Chatard attack, Spielmann variation	15	26.7%	66.7%
C13	French, Albin-Alekhine-Chatard attack, Teichmann variation	1	100.0%	50.0%
C13	French, classical	9	11.1%	50.0%
C13	French, classical, Anderssen variation	7	28.6%	42.9%
C13	French, classical, Anderssen-Richter variation	3	33.3%	16.7%
C13	French, classical, Frankfurt variation	6	16.7%	75.0%
C13	French, classical, Tartakower variation	9	22.2%	66.7%
C13	French, classical, Vistaneckis (Nimzovich) variation	1	0.0%	0.0%
C14	French, classical, Alapin variation	9	44.4%	55.6%
C14	French, classical, Rubinstein variation	14	14.3%	64.3%
C14	French, classical, Stahlberg variation	2	50.0%	75.0%
C14	French, classical, Steinitz variation	425	28.5%	58.5%
C15	French, Winawer (Nimzovich) variation	343	34.7%	56.7%
C15	French, Winawer, Alekhine (Maroczy) gambit	173	23.7%	58.1%
C15	French, Winawer, Alekhine gambit, Alatortsev variation	1	100.0%	50.0%
C15	French, Winawer, Alekhine gambit, Kan variation	71	38.0%	48.6%
C15	French, Winawer, Kondratiyev variation	3	66.7%	66.7%
C15	French, Winawer, fingerslip variation	5	20.0%	70.0%
C16	French, Winawer, Petrosian variation	77	18.2%	53.2%
C16	French, Winawer, advance variation	339	21.2%	54.0%
C17	French, Winawer, advance variation	27	18.5%	53.7%
C17	French, Winawer, advance, 5.a3	320	25.9%	56.4%
C17	French, Winawer, advance, Bogolyubov variation	111	29.7%	58.1%
C17	French, Winawer, advance, Russian variation	17	35.3%	47.1%
C18	French, Winawer, advance variation	115	29.6%	62.6%
C18	French, Winawer, classical variation	272	23.2%	60.5%
C19	French, Winawer, advance, 6...Ne7	120	24.2%	56.3%
C19	French, Winawer, advance, Smyslov variation	97	27.8%	56.2%
C19	French, Winawer, advance, poisoned pawn variation	3559	25.8%	60.0%
C19	French, Winawer, advance, poisoned pawn, Euwe-Gligoric variation	8	37.5%	56.3%
C19	French, Winawer, advance, poisoned pawn, Konstantinopolsky variation	802	25.6%	59.3%
C19	French, Winawer, advance, positional main line	1620	25.6%	57.0%
C20	Alapin's opening	1	0.0%	0.0%
C20	KP, King's head opening	1	100.0%	50.0%
C20	KP, Lopez opening	3	0.0%	33.3%
C20	KP, Mengarini's opening	2	50.0%	25.0%
C20	King's pawn game	1	100.0%	50.0%
C21	Centre game	157	48.4%	65.6%
C21	Danish gambit, Soerensen defence	4	25.0%	62.5%
C21	Halasz gambit	5	20.0%	70.0%
C22	Centre game	1	0.0%	100.0%
C22	Centre game, Berger variation	162	17.9%	64.5%
C22	Centre game, Paulsen attack	6	50.0%	41.7%
C23	Bishop's opening	48	31.3%	55.2%
C23	Bishop's opening, Classical variation	19	15.8%	60.5%
C23	Bishop's opening, Lewis counter-gambit	1	0.0%	0.0%
C23	Bishop's opening, Philidor counter-attack	26	42.3%	71.2%
C23	Bishop's opening, Philidor variation	4	50.0%	50.0%
C24	Bishop's opening, Berlin defence	190	34.2%	58.2%
C24	Bishop's opening, Urusov gambit	2	50.0%	25.0%
C24	Bishop's opening, Urusov gambit, Panov variation	1	0.0%	100.0%
C25	Vienna gambit	11	27.3%	40.9%
C25	Vienna game	243	34.6%	48.1%
C25	Vienna game, Max Lange defence	11	36.4%	27.3%
C25	Vienna, Paulsen variation	20	35.0%	52.5%
C25	Vienna, Pierce gambit	2	0.0%	0.0%
C25	Vienna, Steinitz gambit	1	0.0%	100.0%
C26	Vienna game	29	24.1%	56.9%
C26	Vienna, Falkbeer variation	19	26.3%	44.7%
C26	Vienna, Mengarini variation	1	0.0%	100.0%
C26	Vienna, Paulsen-Mieses variation	76	39.5%	56.6%
C27	Boden-Kieseritsky gambit	2	0.0%	50.0%
C27	Boden-Kieseritsky gambit, Lichtenhein defence	2	50.0%	25.0%
C27	Vienna game	12	50.0%	33.3%
C27	Vienna, Alekhine variation	5	40.0%	20.0%
C27	Vienna, `Frankenstein-Dracula' variation	3	33.3%	83.3%
C28	Vienna game	71	28.2%	49.3%
C29	Vienna gambit	7	28.6%	42.9%
C29	Vienna gambit, Bardeleben variation	1	0.0%	0.0%
C29	Vienna gambit, Breyer variation	21	19.0%	66.7%
C29	Vienna gambit, Kaufmann variation	1	100.0%	50.0%
C29	Vienna gambit, Paulsen attack	2	0.0%	100.0%
C29	Vienna gambit, Steinitz variation	1	0.0%	0.0%
C30	KGD, 2...Nf6	1	0.0%	0.0%
C30	KGD, Keene's defence	2	0.0%	50.0%
C30	KGD, Norwalde variation	1	100.0%	50.0%
C30	KGD, classical variation	25	12.0%	58.0%
C30	KGD, classical, 4.c3	8	25.0%	25.0%
C30	KGD, classical, Reti variation	1	0.0%	100.0%
C31	KGD, Falkbeer counter-gambit	2	0.0%	50.0%
C31	KGD, Falkbeer, Morphy gambit	1	0.0%	100.0%
C31	KGD, Nimzovich counter-gambit	6	16.7%	41.7%
C32	KGD, Falkbeer, 5.de	2	0.0%	50.0%
C32	KGD, Falkbeer, Charousek gambit	1	0.0%	0.0%
C32	KGD, Falkbeer, main line, 7...Bf5	1	100.0%	50.0%
C33	KGA, Breyer gambit	3	0.0%	0.0%
C33	KGA, bishop's gambit	2	50.0%	75.0%
C33	KGA, bishop's gambit, Bledow variation	4	25.0%	12.5%
C33	KGA, bishop's gambit, Bogolyubov variation	1	100.0%	50.0%
C33	KGA, bishop's gambit, Jaenisch variation	10	40.0%	40.0%
C33	KGA, bishop's gambit, McDonnell attack	2	0.0%	100.0%
C33	KGA, bishop's gambit, Morphy variation	2	0.0%	0.0%
C33	KGA, bishop's gambit, Paulsen attack	1	0.0%	100.0%
C33	KGA, bishop's gambit, Steinitz defence	5	0.0%	40.0%
C34	KGA, Becker defence	7	14.3%	78.6%
C34	KGA, Bonsch-Osmolovsky variation	16	43.8%	53.1%
C34	KGA, Fischer defence	26	15.4%	50.0%
C34	KGA, Schallop defence	7	14.3%	21.4%
C34	King's knight's gambit	2	100.0%	50.0%
C35	KGA, Cunningham defence	3	33.3%	16.7%
C35	KGA, Cunningham, Euwe defence	4	50.0%	50.0%
C36	KGA, Abbazia defence, modern variation	23	39.1%	58.7%
C37	KGA, Rosentreter gambit	1	0.0%	0.0%
C38	KGA, Hanstein gambit	1	0.0%	100.0%
C38	KGA, Philidor gambit	1	100.0%	50.0%
C38	KGA, Philidor gambit, Schultz variation	1	0.0%	0.0%
C38	King's knight's gambit	1	0.0%	0.0%
C39	KGA, Allgaier gambit	1	0.0%	100.0%
C39	KGA, Kieseritsky, Berlin defence	9	22.2%	11.1%
C39	KGA, Kieseritsky, Berlin defence, 6.Bc4	7	42.9%	35.7%
C39	KGA, Kieseritsky, Brentano defence, Kaplanek variation	1	100.0%	50.0%
C39	KGA, Kieseritsky, Kolisch defence	12	8.3%	45.8%
C39	KGA, Kieseritsky, Paulsen defence	1	0.0%	0.0%
C39	KGA, Kieseritsky, Rice gambit	8	25.0%	12.5%
C39	KGA, Kieseritsky, Salvio (Rosenthal) defence	1	100.0%	50.0%
C39	King's knight's gambit	1	0.0%	0.0%
C40	Greco defence	5	0.0%	80.0%
C40	Gunderam defence	115	20.9%	65.2%
C40	Latvian counter-gambit	4	25.0%	87.5%
C40	QP counter-gambit (elephant gambit)	3	33.3%	50.0%
C41	Philidor's defence	102	28.4%	53.4%
C41	Philidor, Hanham variation	4	25.0%	62.5%
C41	Philidor, Hanham, Delmar variation	3	66.7%	66.7%
C41	Philidor, Hanham, Krause variation	4	0.0%	50.0%
C41	Philidor, Hanham, Schlechter variation	3	33.3%	83.3%
C41	Philidor, Hanham, Steiner variation	11	18.2%	81.8%
C41	Philidor, Improved Hanham variation	302	36.1%	53.8%
C41	Philidor, Larsen variation	13	38.5%	73.1%
C41	Philidor, Nimzovich (Jaenisch) variation	4	25.0%	62.5%
C41	Philidor, Nimzovich, Klein variation	1	100.0%	50.0%
C41	Philidor, Nimzovich, Rellstab variation	1	0.0%	100.0%
C41	Philidor, Nimzovich, Sokolsky variation	1	0.0%	0.0%
C41	Philidor, Nimzovich, Sozin variation	17	47.1%	58.8%
C41	Philidor, Philidor counter-gambit	6	33.3%	50.0%
C41	Philidor, Philidor counter-gambit, Zukertort variation	6	50.0%	25.0%
C41	Philidor, Steinitz variation	2	50.0%	75.0%
C41	Philidor, exchange variation	102	36.3%	51.5%
C42	Petrov three knights game	72	37.5%	64.6%
C42	Petrov's defence	136	26.5%	46.3%
C42	Petrov, Cochrane gambit	13	7.7%	19.2%
C42	Petrov, Cozio (Lasker) attack	129	35.7%	55.0%
C42	Petrov, Damiano variation	10	50.0%	65.0%
C42	Petrov, French attack	4	25.0%	62.5%
C42	Petrov, Italian variation	74	25.7%	49.3%
C42	Petrov, Kaufmann attack	48	39.6%	51.0%
C42	Petrov, Nimzovich attack	186	39.2%	52.4%
C42	Petrov, Paulsen attack	52	25.0%	52.9%
C42	Petrov, classical attack	289	27.7%	59.2%
C42	Petrov, classical attack, Berger variation	5	20.0%	50.0%
C42	Petrov, classical attack, Chigorin variation	325	36.6%	52.8%
C42	Petrov, classical attack, Jaenisch variation	1412	33.1%	56.4%
C42	Petrov, classical attack, Marshall variation	1564	29.3%	55.3%
C42	Petrov, classical attack, Mason variation	20	45.0%	67.5%
C42	Petrov, classical attack, Tarrasch variation	2	50.0%	75.0%
C42	Petrov, classical attack, close variation	43	37.2%	60.5%
C43	Petrov, Urusov gambit	12	25.0%	45.8%
C43	Petrov, modern (Steinitz) attack	25	28.0%	50.0%
C43	Petrov, modern attack, Bardeleben variation	1	0.0%	0.0%
C43	Petrov, modern attack, Symmetrical variation	598	31.4%	53.3%
C43	Petrov, modern attack, Trifunovic variation	26	38.5%	50.0%
C43	Petrov, modern attack, main line	130	32.3%	57.7%
C44	Dresden opening	2	50.0%	25.0%
C44	Inverted Hanham	6	50.0%	41.7%
C44	Inverted Hungarian	1	0.0%	100.0%
C44	King's pawn game	1	100.0%	50.0%
C44	Konstantinopolsky opening	1	0.0%	0.0%
C44	Ponziani counter-gambit	21	28.6%	42.9%
C44	Ponziani counter-gambit, Cordel variation	1	0.0%	100.0%
C44	Ponziani opening	35	22.9%	62.9%
C44	Ponziani, Caro variation	4	50.0%	50.0%
C44	Ponziani, Jaenisch counter-attack	44	38.6%	46.6%
C44	Ponziani, Steinitz variation	3	0.0%	33.3%
C44	Scotch gambit	3	0.0%	66.7%
C44	Scotch gambit, Benima defence	2	50.0%	25.0%
C44	Scotch gambit, Dubois-Reti defence	123	26.8%	51.6%
C44	Scotch opening	1	0.0%	100.0%
C44	Scotch, Goering gambit	18	44.4%	44.4%
C44	Scotch, Goering gambit, Bardeleben variation	1	100.0%	50.0%
C44	Scotch, Lolli variation	15	20.0%	56.7%
C44	Scotch, Relfsson gambit ('MacLopez')	10	10.0%	35.0%
C45	Scotch game	675	31.7%	54.2%
C45	Scotch, Blackburne attack	3	66.7%	66.7%
C45	Scotch, Blumenfeld attack	2	0.0%	50.0%
C45	Scotch, Ghulam Kassim variation	3	33.3%	50.0%
C45	Scotch, Horwitz attack	10	50.0%	55.0%
C45	Scotch, Mieses variation	293	33.1%	51.7%
C45	Scotch, Potter variation	25	36.0%	62.0%
C45	Scotch, Romanishin variation	5	20.0%	30.0%
C45	Scotch, Schmidt variation	166	44.0%	42.5%
C45	Scotch, Steinitz variation	8	25.0%	50.0%
C45	Scotch, Tartakower variation	2	100.0%	50.0%
C46	Four knights game	204	34.8%	48.3%
C46	Four knights, Gunsberg variation	19	31.6%	31.6%
C46	Four knights, Italian variation	89	24.7%	50.6%
C46	Three knights game	50	32.0%	62.0%
C46	Three knights, Schlechter variation	1	0.0%	100.0%
C46	Three knights, Steinitz variation	27	22.2%	51.9%
C46	Three knights, Steinitz, Rosenthal variation	2	100.0%	50.0%
C47	Four knights, Belgrade gambit	18	33.3%	66.7%
C47	Four knights, Scotch variation	6	50.0%	75.0%
C47	Four knights, Scotch, 4...exd4	391	35.8%	45.8%
C47	Four knights, Scotch, Krause variation	20	55.0%	62.5%
C48	Four knights, Bardeleben variation	3	66.7%	33.3%
C48	Four knights, Marshall variation	3	66.7%	66.7%
C48	Four knights, Ranken variation	5	20.0%	50.0%
C48	Four knights, Rubinstein counter-gambit	528	28.6%	54.5%
C48	Four knights, Rubinstein counter-gambit, 5.Be2	5	0.0%	60.0%
C48	Four knights, Rubinstein counter-gambit, Bogolyubov variation	4	25.0%	62.5%
C48	Four knights, Rubinstein counter-gambit, Henneberger variation	8	75.0%	37.5%
C48	Four knights, Rubinstein counter-gambit, exchange variation	44	54.5%	45.5%
C48	Four knights, Spanish variation	64	28.1%	59.4%
C48	Four knights, Spanish, classical defence	39	33.3%	55.1%
C49	Four knights	10	50.0%	55.0%
C49	Four knights, Gunsberg counter-attack	1	0.0%	100.0%
C49	Four knights, Nimzovich (Paulsen) variation	25	48.0%	56.0%
C49	Four knights, double Ruy Lopez	101	43.6%	51.5%
C49	Four knights, symmetrical variation	91	31.9%	54.4%
C49	Four knights, symmetrical, Blake variation	2	50.0%	75.0%
C49	Four knights, symmetrical, Capablanca variation	17	23.5%	76.5%
C49	Four knights, symmetrical, Maroczy system	24	20.8%	47.9%
C49	Four knights, symmetrical, Metger unpin	356	34.0%	52.9%
C49	Four knights, symmetrical, Pillsbury variation	11	18.2%	36.4%
C50	Giuoco Pianissimo	444	33.3%	52.7%
C50	Giuoco Pianissimo, Canal variation	188	26.6%	68.6%
C50	Giuoco Pianissimo, Italian four knights variation	93	32.3%	49.5%
C50	Giuoco Piano	60	31.7%	50.8%
C50	Giuoco Piano, four knights variation	29	27.6%	62.1%
C50	Hungarian defence	13	23.1%	34.6%
C50	Hungarian defence, Tartakower variation	1	0.0%	100.0%
C50	King's pawn game	81	28.4%	62.3%
C50	Rousseau gambit	3	0.0%	66.7%
C51	Evans gambit declined	1	0.0%	100.0%
C51	Evans gambit declined, 5.a4	77	22.1%	42.2%
C51	Evans gambit declined, Cordel variation	2	0.0%	50.0%
C51	Evans gambit, 5...Be7	2	100.0%	50.0%
C51	Evans gambit, Cordel variation	10	60.0%	50.0%
C51	Evans gambit, Paulsen variation	1	0.0%	0.0%
C51	Evans gambit, Stone-Ware variation	6	16.7%	41.7%
C51	Evans gambit, normal variation	1	0.0%	0.0%
C52	Evans gambit	18	27.8%	36.1%
C52	Evans gambit, Lasker defence	2	50.0%	25.0%
C52	Evans gambit, Richardson attack	1	0.0%	0.0%
C52	Evans gambit, Tartakower attack	7	28.6%	42.9%
C52	Evans gambit, Waller attack	2	0.0%	50.0%
C52	Evans gambit, compromised defence, Paulsen variation	2	0.0%	100.0%
C53	Giuoco Piano	661	29.8%	52.0%
C53	Giuoco Piano, Anderssen variation	6	66.7%	33.3%
C53	Giuoco Piano, Bird's attack	29	31.0%	56.9%
C53	Giuoco Piano, LaBourdonnais variation	2	0.0%	100.0%
C53	Giuoco Piano, Tarrasch variation	1	0.0%	100.0%
C53	Giuoco Piano, centre-holding variation	9	0.0%	77.8%
C53	Giuoco Piano, close variation	11	45.5%	68.2%
C54	Giuoco Piano	11	54.5%	36.4%
C54	Giuoco Piano, Moeller (Therkatz) attack	1	0.0%	100.0%
C55	Giuoco piano	2	50.0%	25.0%
C55	Giuoco piano, Holzhausen attack	1	0.0%	100.0%
C55	Two knights defence	10	30.0%	35.0%
C55	Two knights defence (Modern bishop's opening)	488	30.3%	54.7%
C55	Two knights defence, Perreux variation	17	11.8%	41.2%
C55	Two knights, Max Lange attack	16	6.3%	53.1%
C55	Two knights, Max Lange attack, Loman defence	1	100.0%	50.0%
C55	Two knights, Max Lange attack, Marshall variation	1	0.0%	0.0%
C55	Two knights, Max Lange attack, Steinitz variation	1	0.0%	100.0%
C56	Two knights defence	23	39.1%	54.3%
C57	Two knights defence	5	0.0%	60.0%
C57	Two knights defence, Fritz variation	1	0.0%	0.0%
C57	Two knights defence, Fritz, Gruber variation	40	40.0%	52.5%
C57	Two knights defence, Lolli attack	3	66.7%	66.7%
C57	Two knights defence, Ulvestad variation	21	23.8%	59.5%
C57	Two knights defence, Wilkes Barre (Traxler) variation	1	0.0%	100.0%
C58	Two knights defence	24	45.8%	56.3%
C58	Two knights defence, Bogolyubov variation	6	16.7%	75.0%
C58	Two knights defence, Colman variation	2	0.0%	50.0%
C58	Two knights defence, Kieseritsky variation	3	66.7%	33.3%
C58	Two knights defence, Paoli variation	3	33.3%	83.3%
C58	Two knights defence, Yankovich variation	1	0.0%	0.0%
C59	Two knights defence	33	27.3%	37.9%
C59	Two knights defence, Goering variation	1	100.0%	50.0%
C59	Two knights defence, Steinitz variation	25	28.0%	62.0%
C60	Ruy Lopez (Spanish opening)	5	20.0%	30.0%
C60	Ruy Lopez, Cozio defence	36	27.8%	55.6%
C60	Ruy Lopez, Cozio defence, Paulsen variation	3	0.0%	66.7%
C60	Ruy Lopez, Lucena defence	5	0.0%	60.0%
C60	Ruy Lopez, fianchetto (Smyslov/Barnes) defence	86	36.0%	56.4%
C61	Ruy Lopez, Bird's defence	24	33.3%	62.5%
C62	Ruy Lopez, old Steinitz defence	381	31.0%	54.6%
C62	Ruy Lopez, old Steinitz defence, Nimzovich attack	11	36.4%	63.6%
C63	Ruy Lopez, Schliemann defence	23	30.4%	54.3%
C63	Ruy Lopez, Schliemann defence, Berger variation	66	34.8%	53.8%
C64	Ruy Lopez, Cordel gambit	3	0.0%	100.0%
C64	Ruy Lopez, classical (Cordel) defence	255	26.3%	53.1%
C64	Ruy Lopez, classical defence, 4.c3	127	25.2%	54.3%
C64	Ruy Lopez, classical defence, Benelux variation	163	35.0%	47.5%
C65	Ruy Lopez, Berlin defence	441	34.2%	50.7%
C65	Ruy Lopez, Berlin defence, 4.O-O	12	33.3%	58.3%
C65	Ruy Lopez, Berlin defence, Beverwijk variation	117	41.9%	49.1%
C65	Ruy Lopez, Berlin defence, Duras variation	6	50.0%	58.3%
C65	Ruy Lopez, Berlin defence, Kaufmann variation	4	25.0%	62.5%
C65	Ruy Lopez, Berlin defence, Mortimer variation	8	12.5%	56.3%
C65	Ruy Lopez, Berlin defence, Nyholm attack	50	50.0%	55.0%
C66	Ruy Lopez, Berlin defence, 4.O-O, d6	20	25.0%	57.5%
C66	Ruy Lopez, Berlin defence, hedgehog variation	56	33.9%	49.1%
C66	Ruy Lopez, closed Berlin defence, Bernstein variation	8	50.0%	50.0%
C66	Ruy Lopez, closed Berlin defence, Chigorin variation	3	33.3%	83.3%
C66	Ruy Lopez, closed Berlin defence, Showalter variation	39	38.5%	55.1%
C66	Ruy Lopez, closed Berlin defence, Wolf variation	35	42.9%	52.9%
C67	Ruy Lopez, Berlin defence, Cordel variation	4	50.0%	50.0%
C67	Ruy Lopez, Berlin defence, Minckwitz variation	11	36.4%	63.6%
C67	Ruy Lopez, Berlin defence, Pillsbury variation	3	66.7%	33.3%
C67	Ruy Lopez, Berlin defence, Rio de Janeiro variation	8	62.5%	68.8%
C67	Ruy Lopez, Berlin defence, Rosenthal variation	5	40.0%	40.0%
C67	Ruy Lopez, Berlin defence, Trifunovic variation	1	0.0%	100.0%
C67	Ruy Lopez, Berlin defence, Winawer attack	9	66.7%	44.4%
C67	Ruy Lopez, Berlin defence, Zukertort variation	2	0.0%	0.0%
C67	Ruy Lopez, Berlin defence, open variation	1156	39.4%	52.7%
C67	Ruy Lopez, open Berlin defence, 5...Be7	24	41.7%	54.2%
C67	Ruy Lopez, open Berlin defence, Showalter variation	2	50.0%	25.0%
C67	Ruy Lopez, open Berlin defence, l'Hermet variation	32	21.9%	54.7%
C68	Ruy Lopez, exchange variation	44	29.5%	62.5%
C68	Ruy Lopez, exchange, Alekhine variation	9	44.4%	44.4%
C68	Ruy Lopez, exchange, Keres variation	86	40.7%	45.9%
C69	Ruy Lopez, exchange variation, 5.O-O	171	34.5%	51.8%
C69	Ruy Lopez, exchange variation, Alapin gambit	20	25.0%	62.5%
C69	Ruy Lopez, exchange, Bronstein variation	224	33.9%	53.1%
C69	Ruy Lopez, exchange, Gligoric variation	239	38.9%	56.7%
C70	Ruy Lopez	1	100.0%	50.0%
C70	Ruy Lopez, Caro variation	21	19.0%	66.7%
C70	Ruy Lopez, Classical defence deferred	289	27.7%	47.1%
C70	Ruy Lopez, Cozio defence deferred	4	50.0%	75.0%
C70	Ruy Lopez, Schliemann defence deferred	1	0.0%	100.0%
C70	Ruy Lopez, Taimanov (chase/wing/accelerated counterthrust) variation	75	30.7%	56.7%
C71	Ruy Lopez, modern Steinitz defence	65	36.9%	56.9%
C71	Ruy Lopez, modern Steinitz defence, Duras (Keres) variation	93	33.3%	51.1%
C71	Ruy Lopez, modern Steinitz defence, Three knights variation	29	27.6%	62.1%
C72	Ruy Lopez, modern Steinitz defence, 5.O-O	243	30.9%	58.2%
C73	Ruy Lopez, modern Steinitz defence, Alapin variation	92	31.5%	54.9%
C73	Ruy Lopez, modern Steinitz defence, Richter variation	78	30.8%	44.9%
C74	Ruy Lopez, Siesta, Kopayev variation	37	32.4%	45.9%
C74	Ruy Lopez, modern Steinitz defence	48	31.3%	49.0%
C74	Ruy Lopez, modern Steinitz defence, siesta variation	7	0.0%	71.4%
C75	Ruy Lopez, modern Steinitz defence	99	25.3%	54.0%
C75	Ruy Lopez, modern Steinitz defence, Rubinstein variation	48	39.6%	61.5%
C76	Ruy Lopez, modern Steinitz defence, fianchetto (Bronstein) variation	163	31.3%	48.8%
C77	Ruy Lopez, Anderssen variation	336	29.5%	50.7%
C77	Ruy Lopez, Morphy defence	314	36.0%	55.9%
C77	Ruy Lopez, Morphy defence, Duras variation	25	24.0%	44.0%
C77	Ruy Lopez, Treybal (Bayreuth) variation (exchange var. deferred)	96	32.3%	49.5%
C77	Ruy Lopez, Wormald (Alapin) attack	196	31.6%	49.5%
C77	Ruy Lopez, four knights (Tarrasch) variation	157	30.6%	54.1%
C78	Ruy Lopez, ...b5 & ...d6	22	22.7%	52.3%
C78	Ruy Lopez, 5.O-O	486	30.9%	54.7%
C78	Ruy Lopez, Archangelsk (counterthrust) variation	618	29.1%	54.7%
C78	Ruy Lopez, Moeller defence	386	33.2%	52.6%
C78	Ruy Lopez, Wing attack	3	0.0%	66.7%
C79	Ruy Lopez, Steinitz defence deferred (Russian defence)	121	28.1%	52.1%
C79	Ruy Lopez, Steinitz defence deferred, Lipnitsky variation	2	100.0%	50.0%
C79	Ruy Lopez, Steinitz defence deferred, Rubinstein variation	13	7.7%	57.7%
C80	Ruy Lopez, open (Tarrasch) defence	38	18.4%	53.9%
C80	Ruy Lopez, open, 6.d4	19	26.3%	65.8%
C80	Ruy Lopez, open, 7.Bb3	24	16.7%	58.3%
C80	Ruy Lopez, open, 8...Be6	416	35.3%	46.3%
C80	Ruy Lopez, open, Bernstein variation	415	34.7%	61.7%
C80	Ruy Lopez, open, Bernstein variation, Karpov gambit	14	85.7%	57.1%
C80	Ruy Lopez, open, Friess attack	7	57.1%	42.9%
C80	Ruy Lopez, open, Harksen gambit	5	0.0%	40.0%
C80	Ruy Lopez, open, Riga variation	23	60.9%	56.5%
C80	Ruy Lopez, open, Schlechter defence	3	33.3%	50.0%
C80	Ruy Lopez, open, Tartakower variation	10	40.0%	70.0%
C80	Ruy Lopez, open, Zukertort variation	3	0.0%	66.7%
C81	Ruy Lopez, open, Howell attack	44	36.4%	63.6%
C81	Ruy Lopez, open, Howell attack, Ekstroem variation	9	66.7%	66.7%
C82	Ruy Lopez, open, Berlin variation	8	12.5%	68.8%
C82	Ruy Lopez, open, Dilworth variation	51	33.3%	65.7%
C82	Ruy Lopez, open, Italian variation	19	42.1%	57.9%
C82	Ruy Lopez, open, Motzko attack	35	34.3%	51.4%
C82	Ruy Lopez, open, Motzko attack, Nenarokov variation	2	0.0%	0.0%
C82	Ruy Lopez, open, St. Petersburg variation	120	35.8%	64.6%
C83	Ruy Lopez, open, 9...Be7, 10.Re1	11	54.5%	63.6%
C83	Ruy Lopez, open, Breslau variation	1	0.0%	100.0%
C83	Ruy Lopez, open, Malkin variation	7	14.3%	64.3%
C83	Ruy Lopez, open, classical defence	75	41.3%	60.7%
C84	Ruy Lopez, closed defence	421	36.1%	51.5%
C84	Ruy Lopez, closed, centre attack	63	27.0%	51.6%
C85	Ruy Lopez, Exchange variation doubly deferred (DERLD)	452	35.6%	51.9%
C86	Ruy Lopez, Worrall attack	20	40.0%	70.0%
C86	Ruy Lopez, Worrall attack, sharp line	122	35.2%	53.7%
C86	Ruy Lopez, Worrall attack, solid line	65	30.8%	47.7%
C87	Ruy Lopez, closed, Averbach variation	132	30.3%	59.8%
C88	Ruy Lopez, Trajkovic counter-attack	74	28.4%	49.3%
C88	Ruy Lopez, closed	173	25.4%	51.4%
C88	Ruy Lopez, closed, 7...O-O	693	31.5%	53.7%
C88	Ruy Lopez, closed, 7...d6, 8.d4	1	0.0%	0.0%
C88	Ruy Lopez, closed, 8.c3	7	28.6%	42.9%
C88	Ruy Lopez, closed, Balla variation	10	20.0%	50.0%
C88	Ruy Lopez, closed, anti-Marshall 8.a4	728	30.5%	51.8%
C89	Ruy Lopez, Marshall counter-attack	81	30.9%	57.4%
C89	Ruy Lopez, Marshall counter-attack, 11...c6	87	37.9%	42.0%
C89	Ruy Lopez, Marshall, Kevitz variation	4	0.0%	25.0%
C89	Ruy Lopez, Marshall, main line, 12.d2d4	124	36.3%	44.8%
C89	Ruy Lopez, Marshall, main line, 14...Qh3	46	37.0%	48.9%
C90	Ruy Lopez, closed (with ...d6)	1400	27.1%	49.6%
C90	Ruy Lopez, closed, Pilnik variation	1864	25.5%	52.7%
C90	Ruy Lopez, closed, Suetin variation	18	38.9%	47.2%
C91	Ruy Lopez, closed, 9.d4	1922	27.5%	54.8%
C91	Ruy Lopez, closed, Bogolyubov variation	3206	30.2%	51.2%
C92	Ruy Lopez, closed, 9.h3	247	36.4%	55.9%
C92	Ruy Lopez, closed, Flohr-Zaitsev system (Lenzerheide variation)	2587	32.5%	52.3%
C92	Ruy Lopez, closed, Keres (9...a5) variation	35	31.4%	52.9%
C92	Ruy Lopez, closed, Kholmov variation	96	26.0%	55.7%
C92	Ruy Lopez, closed, Ragozin-Petrosian (`Keres') variation	265	33.6%	65.5%
C93	Ruy Lopez, closed, Smyslov defence	175	34.9%	62.0%
C94	Ruy Lopez, closed, Breyer defence	52	44.2%	60.6%
C95	Ruy Lopez, closed, Breyer, Borisenko variation	1714	30.4%	57.4%
C95	Ruy Lopez, closed, Breyer, Gligoric variation	31	22.6%	66.1%
C95	Ruy Lopez, closed, Breyer, Simagin variation	5	0.0%	20.0%
C96	Ruy Lopez, closed (10...c5)	605	31.6%	56.6%
C96	Ruy Lopez, closed (8...Na5)	26	30.8%	50.0%
C96	Ruy Lopez, closed, Borisenko defence	52	30.8%	65.4%
C96	Ruy Lopez, closed, Keres (...Nd7) defence	218	34.9%	67.9%
C96	Ruy Lopez, closed, Rossolimo defence	3	33.3%	83.3%
C97	Ruy Lopez, closed, Chigorin defence	814	23.6%	61.1%
C98	Ruy Lopez, closed, Chigorin, 12...Nc6	239	22.6%	61.1%
C99	Ruy Lopez, closed, Chigorin, 12...c5d4	2759	36.2%	59.2%
D00	Blackmar gambit	4	25.0%	62.5%
D00	Levitsky attack (Queen's bishop attack)	240	35.0%	52.9%
D00	Queen's pawn game	75	26.7%	42.7%
D00	Queen's pawn, Chigorin variation	306	23.5%	54.9%
D00	Queen's pawn, Mason variation	427	28.1%	55.3%
D00	Queen's pawn, Mason variation, Steinitz counter-gambit	13	30.8%	46.2%
D00	Queen's pawn, stonewall attack	5	0.0%	20.0%
D01	Richter-Veresov attack	112	29.5%	43.3%
D01	Richter-Veresov attack, Richter variation	2	0.0%	0.0%
D01	Richter-Veresov attack, Veresov variation	5	20.0%	70.0%
D02	Queen's bishop game	625	32.2%	51.4%
D02	Queen's pawn game	3199	30.0%	52.0%
D02	Queen's pawn game, Chigorin variation	88	39.8%	58.5%
D02	Queen's pawn game, Krause variation	114	35.1%	56.1%
D03	Torre attack (Tartakower variation)	168	31.5%	50.9%
D04	Queen's pawn game	299	32.8%	51.2%
D05	Colle system	31	35.5%	59.7%
D05	Queen's pawn game	244	26.6%	55.9%
D05	Queen's pawn game, Rubinstein (Colle-Zukertort) variation	50	38.0%	55.0%
D05	Queen's pawn game, Zukertort variation	13	0.0%	69.2%
D06	QGD, Grau (Sahovic) defence	32	37.5%	68.8%
D06	QGD, Marshall defence	124	36.3%	60.9%
D06	QGD, symmetrical (Austrian) defence	2	100.0%	50.0%
D06	Queen's Gambit	7	14.3%	64.3%
D07	QGD, Chigorin defence	646	28.8%	58.2%
D07	QGD, Chigorin defence, Janowski variation	23	21.7%	67.4%
D08	QGD, Albin counter-gambit	8	12.5%	43.8%
D08	QGD, Albin counter-gambit, Alapin variation	2	0.0%	100.0%
D09	QGD, Albin counter-gambit, 5.g3	9	44.4%	55.6%
D10	QGD Slav defence	1292	28.5%	52.5%
D10	QGD Slav defence, Alekhine variation	41	46.3%	45.1%
D10	QGD Slav defence, exchange variation	555	32.8%	50.8%
D10	QGD Slav, Winawer counter-gambit	37	24.3%	58.1%
D11	QGD Slav, 3.Nf3	821	31.3%	53.7%
D11	QGD Slav, 4.e3	679	35.5%	53.1%
D11	QGD Slav, Breyer variation	98	23.5%	57.7%
D12	QGD Slav, 4.e3 Bf5	1334	32.8%	55.3%
D12	QGD Slav, Amsterdam variation	27	33.3%	42.6%
D12	QGD Slav, Landau variation	1	0.0%	0.0%
D12	QGD Slav, exchange variation	36	22.2%	63.9%
D13	QGD Slav, exchange variation	351	34.2%	53.0%
D14	QGD Slav, exchange variation, 6.Bf4 Bf5	165	29.1%	50.9%
D14	QGD Slav, exchange, Trifunovic variation	40	50.0%	62.5%
D15	QGD Slav accepted	61	34.4%	45.1%
D15	QGD Slav, 4.Nc3	1046	33.5%	53.1%
D15	QGD Slav, 5.e3 (Alekhine variation)	56	25.0%	50.0%
D15	QGD Slav, Schlechter variation	69	31.9%	59.4%
D15	QGD Slav, Slav gambit	6	66.7%	50.0%
D15	QGD Slav, Suechting variation	5	0.0%	60.0%
D15	QGD Slav, Tolush-Geller gambit	40	27.5%	53.8%
D16	QGD Slav accepted, Alapin variation	48	29.2%	64.6%
D16	QGD Slav, Smyslov variation	19	42.1%	57.9%
D16	QGD Slav, Soultanbeieff variation	30	40.0%	70.0%
D16	QGD Slav, Steiner variation	117	36.8%	53.4%
D17	QGD Slav, Carlsbad variation	380	34.2%	56.8%
D17	QGD Slav, Czech defence	136	37.5%	50.4%
D17	QGD Slav, Krause attack	242	35.5%	55.4%
D17	QGD Slav, Wiesbaden variation	284	25.0%	63.9%
D18	QGD Slav, Dutch variation	46	34.8%	58.7%
D18	QGD Slav, Dutch, Lasker variation	5	0.0%	60.0%
D19	QGD Slav, Dutch variation	1338	29.8%	55.6%
D19	QGD Slav, Dutch variation, main line	196	38.3%	54.3%
D20	QGA, 3.e4	858	31.0%	54.1%
D20	QGA, Linares variation	17	17.6%	55.9%
D20	Queen's gambit accepted	754	33.4%	54.1%
D21	QGA, 3.Nf3	252	23.0%	60.3%
D21	QGA, Alekhine defense, Borisenko-Furman variation	11	18.2%	54.5%
D21	QGA, Ericson variation	1	100.0%	50.0%
D22	QGA, Alekhine defence	56	41.1%	58.0%
D22	QGA, Alekhine defence, Alatortsev variation	8	50.0%	75.0%
D22	QGA, Haberditz variation	15	40.0%	53.3%
D23	QGA, Mannheim variation	150	32.7%	50.3%
D23	Queen's gambit accepted	111	35.1%	42.8%
D24	QGA, 4.Nc3	143	36.4%	55.9%
D24	QGA, Bogolyubov variation	60	23.3%	51.7%
D25	QGA, 4.e3	118	27.1%	65.3%
D25	QGA, Flohr variation	56	16.1%	34.8%
D25	QGA, Janowsky-Larsen variation	178	32.6%	55.6%
D25	QGA, Smyslov variation	58	27.6%	60.3%
D26	QGA, 4...e6	223	34.1%	51.1%
D26	QGA, classical variation	322	39.1%	50.9%
D26	QGA, classical variation, 6.O-O	72	36.1%	58.3%
D26	QGA, classical, Steinitz variation	6	16.7%	91.7%
D27	QGA, classical, 6...a6	1181	36.2%	52.3%
D27	QGA, classical, Geller variation	34	32.4%	51.5%
D27	QGA, classical, Rubinstein variation	1643	35.1%	54.7%
D28	QGA, classical, 7...b5	51	45.1%	46.1%
D28	QGA, classical, 7.Qe2	30	46.7%	56.7%
D29	QGA, classical, 8...Bb7	288	32.6%	44.1%
D29	QGA, classical, Smyslov variation	11	18.2%	54.5%
D30	QGD	310	32.6%	52.4%
D30	QGD Slav	128	27.3%	54.3%
D30	QGD Slav, Semmering variation	13	38.5%	57.7%
D30	QGD, Capablanca variation	14	35.7%	53.6%
D30	QGD, Capablanca-Duras variation	169	32.5%	54.7%
D30	QGD, Hastings variation	97	39.2%	47.4%
D30	QGD, Spielmann variation	1	100.0%	50.0%
D30	QGD, Vienna variation	87	34.5%	49.4%
D30	Queen's gambit declined	2010	30.9%	55.1%
D31	QGD, 3.Nc3	264	27.3%	52.7%
D31	QGD, Alapin variation	1	0.0%	0.0%
D31	QGD, Charousek (Petrosian) variation	186	28.0%	49.5%
D31	QGD, Janowski variation	11	9.1%	59.1%
D31	QGD, semi-Slav	369	34.4%	54.3%
D31	QGD, semi-Slav, Abrahams variation	124	24.2%	46.0%
D31	QGD, semi-Slav, Junge variation	1	0.0%	100.0%
D31	QGD, semi-Slav, Koomen variation	9	44.4%	66.7%
D31	QGD, semi-Slav, Marshall gambit	505	31.3%	53.1%
D31	QGD, semi-Slav, Noteboom variation	84	26.2%	46.4%
D32	QGD, Tarrasch defence	110	35.5%	53.2%
D32	QGD, Tarrasch defence, 4.cd ed	8	37.5%	43.8%
D32	QGD, Tarrasch defence, Marshall gambit	2	50.0%	75.0%
D32	QGD, Tarrasch defence, Tarrasch gambit	1	0.0%	0.0%
D32	QGD, Tarrasch, von Hennig-Schara gambit	33	24.2%	60.6%
D33	QGD, Tarrasch, Folkestone (Swedish) variation	21	57.1%	42.9%
D33	QGD, Tarrasch, Prague variation	10	30.0%	65.0%
D33	QGD, Tarrasch, Schlechter-Rubinstein system	6	16.7%	75.0%
D33	QGD, Tarrasch, Schlechter-Rubinstein system, Rey Ardid variation	1	0.0%	0.0%
D33	QGD, Tarrasch, Wagner variation	20	40.0%	60.0%
D34	QGD, Tarrasch, Prague variation, 7...Be7	89	30.3%	59.0%
D34	QGD, Tarrasch, Prague variation, 9.Bg5	402	38.1%	60.1%
D34	QGD, Tarrasch, Prague variation, Normal position	350	31.7%	63.6%
D34	QGD, Tarrasch, Reti variation	15	33.3%	70.0%
D34	QGD, Tarrasch, Stoltz variation	2	0.0%	100.0%
D35	QGD, 3...Nf6	66	27.3%	50.0%
D35	QGD, Harrwitz attack	39	30.8%	56.4%
D35	QGD, exchange variation	67	28.4%	59.0%
D35	QGD, exchange, Saemisch variation	82	31.7%	53.7%
D35	QGD, exchange, positional line	504	29.0%	55.4%
D35	QGD, exchange, positional line, 5...c6	353	32.0%	50.6%
D36	QGD, exchange, positional line, 6.Qc2	46	32.6%	59.8%
D37	QGD, 4.Nf3	2123	32.2%	52.0%
D37	QGD, classical variation (5.Bf4)	2280	33.0%	53.4%
D38	QGD, Ragozin variation	1775	33.0%	53.6%
D39	QGD, Ragozin, Vienna variation	480	34.2%	54.8%
D40	QGD, Semi-Tarrasch defence	406	34.2%	50.1%
D40	QGD, Semi-Tarrasch defence, Pillsbury variation	6	66.7%	33.3%
D40	QGD, Semi-Tarrasch, symmetrical variation	2	0.0%	50.0%
D41	QGD, Semi-Tarrasch with e3	87	41.4%	49.4%
D41	QGD, Semi-Tarrasch, 5.cd	303	36.3%	54.8%
D41	QGD, Semi-Tarrasch, Kmoch variation	3	33.3%	83.3%
D41	QGD, Semi-Tarrasch, San Sebastian variation	32	15.6%	67.2%
D42	QGD, Semi-Tarrasch, 7.Bd3	203	33.0%	51.0%
D43	QGD semi-Slav	4269	31.6%	51.5%
D43	QGD semi-Slav, Hastings variation	4	0.0%	25.0%
D44	QGD semi-Slav, 5.Bg5 dc	59	54.2%	52.5%
D44	QGD semi-Slav, Botvinnik system (anti-Meran)	49	22.4%	54.1%
D44	QGD semi-Slav, Ekstrom variation	50	22.0%	29.0%
D44	QGD semi-Slav, anti-Meran gambit	768	26.3%	60.2%
D44	QGD semi-Slav, anti-Meran, Alatortsev system	17	17.6%	67.6%
D44	QGD semi-Slav, anti-Meran, Lilienthal variation	362	24.6%	57.0%
D44	QGD semi-Slav, anti-Meran, Szabo variation	101	21.8%	34.7%
D45	QGD semi-Slav, 5...Nd7	188	31.4%	52.4%
D45	QGD semi-Slav, 5.e3	96	28.1%	55.7%
D45	QGD semi-Slav, Rubinstein (anti-Meran) system	9	22.2%	55.6%
D45	QGD semi-Slav, Stoltz variation	14367	32.1%	51.4%
D45	QGD semi-Slav, accelerated Meran (Alekhine variation)	791	31.9%	52.0%
D45	QGD semi-Slav, stonewall defence	11	18.2%	72.7%
D46	QGD semi-Slav, 6.Bd3	12	33.3%	50.0%
D46	QGD semi-Slav, Bogolyubov variation	54	29.6%	66.7%
D46	QGD semi-Slav, Chigorin defence	152	33.6%	51.0%
D46	QGD semi-Slav, Romih variation	29	27.6%	65.5%
D47	QGD semi-Slav, 7.Bc4	38	26.3%	60.5%
D47	QGD semi-Slav, Meran variation	804	38.2%	51.2%
D47	QGD semi-Slav, Meran, Wade variation	11312	29.3%	52.5%
D47	QGD semi-Slav, neo-Meran (Lundin variation)	338	32.2%	57.0%
D48	QGD semi-Slav, Meran	97	24.7%	51.5%
D48	QGD semi-Slav, Meran, 8...a6	1376	27.5%	48.1%
D48	QGD semi-Slav, Meran, Pirc variation	9	44.4%	44.4%
D48	QGD semi-Slav, Meran, Reynolds' variation	1049	30.1%	54.1%
D48	QGD semi-Slav, Meran, old main line	156	32.7%	58.7%
D49	QGD semi-Slav, Meran, Blumenfeld variation	477	30.8%	51.3%
D49	QGD semi-Slav, Meran, Rabinovich variation	124	39.5%	61.7%
D49	QGD semi-Slav, Meran, Rellstab attack	36	30.6%	45.8%
D49	QGD semi-Slav, Meran, Sozin variation	268	36.9%	47.2%
D49	QGD semi-Slav, Meran, Stahlberg variation	74	27.0%	60.8%
D50	QGD, 4.Bg5	33	24.2%	48.5%
D50	QGD, Been-Koomen variation	5	40.0%	60.0%
D50	QGD, Semi-Tarrasch	2	50.0%	75.0%
D50	QGD, Semi-Tarrasch, Primitive Pillsbury variation	10	30.0%	45.0%
D51	QGD	10	30.0%	35.0%
D51	QGD, 4.Bg5 Nbd7	28	50.0%	60.7%
D51	QGD, 5...c6	19	26.3%	65.8%
D51	QGD, Alekhine variation	1	0.0%	100.0%
D51	QGD, Capablanca anti-Cambridge Springs variation	4	0.0%	25.0%
D51	QGD, Manhattan variation	2	50.0%	75.0%
D52	QGD	40	52.5%	61.3%
D52	QGD, Cambridge Springs defence	3	100.0%	50.0%
D52	QGD, Cambridge Springs defence, 7.cd	29	31.0%	60.3%
D52	QGD, Cambridge Springs defence, Argentine variation	13	15.4%	61.5%
D52	QGD, Cambridge Springs defence, Bogoljubow variation	319	32.0%	54.2%
D52	QGD, Cambridge Springs defence, Capablanca variation	12	41.7%	45.8%
D52	QGD, Cambridge Springs defence, Rubinstein variation	84	35.7%	54.8%
D52	QGD, Cambridge Springs defence, Yugoslav variation	201	33.3%	54.5%
D53	QGD, 4.Bg5 Be7	76	34.2%	65.8%
D53	QGD, 4.Bg5 Be7, 5.e3 O-O	8	12.5%	56.3%
D53	QGD, Lasker variation	1	0.0%	0.0%
D54	QGD, Anti-neo-orthodox variation	11	36.4%	54.5%
D55	QGD, 6.Nf3	64	28.1%	50.0%
D55	QGD, Neo-orthodox variation, 7.Bh4	73	46.6%	54.8%
D55	QGD, Neo-orthodox variation, 7.Bxf6	84	39.3%	56.5%
D55	QGD, Petrosian variation	354	46.0%	54.4%
D55	QGD, Pillsbury attack	1	0.0%	100.0%
D56	QGD, Lasker defence	193	34.7%	48.4%
D56	QGD, Lasker defence, Teichmann variation	35	31.4%	58.6%
D57	QGD, Lasker defence, Bernstein variation	4	25.0%	62.5%
D57	QGD, Lasker defence, main line	16	37.5%	56.3%
D58	QGD, Tartakower (Makagonov-Bondarevsky) system	6791	33.1%	51.5%
D59	QGD, Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5	162	35.2%	52.2%
D59	QGD, Tartakower variation	148	46.6%	41.6%
D60	QGD, Orthodox defence	45	28.9%	56.7%
D60	QGD, Orthodox defence, Botvinnik variation	34	50.0%	54.4%
D60	QGD, Orthodox defence, Rauzer variation	7	14.3%	64.3%
D61	QGD, Orthodox defence, Rubinstein variation	155	31.0%	54.8%
D62	QGD, Orthodox defence, 7.Qc2 c5, 8.cd (Rubinstein)	188	45.2%	52.4%
D63	QGD, Orthodox defence	27	37.0%	63.0%
D63	QGD, Orthodox defence, 7.Rc1	69	37.7%	53.6%
D63	QGD, Orthodox defence, Capablanca variation	2	0.0%	50.0%
D63	QGD, Orthodox defence, Pillsbury attack	9	22.2%	44.4%
D63	QGD, Orthodox defence, Swiss (Henneberger) variation	100	31.0%	57.5%
D63	QGD, Orthodox defence, Swiss, Karlsbad variation	246	34.6%	51.8%
D64	QGD, Orthodox defence, Rubinstein attack (with Rc1)	63	46.0%	53.2%
D64	QGD, Orthodox defence, Rubinstein attack, Gruenfeld variation	43	46.5%	48.8%
D64	QGD, Orthodox defence, Rubinstein attack, Karlsbad variation	2	50.0%	25.0%
D64	QGD, Orthodox defence, Rubinstein attack, Wolf variation	25	36.0%	46.0%
D65	QGD, Orthodox defence, Rubinstein attack, main line	5	40.0%	40.0%
D66	QGD, Orthodox defence, Bd3 line	89	44.9%	57.3%
D66	QGD, Orthodox defence, Bd3 line, fianchetto variation	8	37.5%	56.3%
D67	QGD, Orthodox defence, Bd3 line	36	44.4%	50.0%
D67	QGD, Orthodox defence, Bd3 line, 11.O-O	106	34.9%	67.5%
D67	QGD, Orthodox defence, Bd3 line, Alekhine variation	124	49.2%	58.5%
D67	QGD, Orthodox defence, Bd3 line, Janowski variation	6	33.3%	66.7%
D68	QGD, Orthodox defence, classical variation	129	34.9%	56.2%
D68	QGD, Orthodox defence, classical, 13.d1b1 (Maroczy)	9	66.7%	55.6%
D68	QGD, Orthodox defence, classical, 13.d1c2 (Vidmar)	86	44.2%	55.8%
D69	QGD, Orthodox defence, classical, 13.de	17	64.7%	50.0%
D70	Neo-Gruenfeld (Kemeri) defence	20	50.0%	60.0%
D70	Neo-Gruenfeld defence	54	22.2%	61.1%
D71	Neo-Gruenfeld, 5.cd	86	45.3%	52.9%
D72	Neo-Gruenfeld, 5.cd, main line	30	30.0%	51.7%
D73	Neo-Gruenfeld, 5.Nf3	250	31.2%	55.2%
D74	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O	54	51.9%	59.3%
D75	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3	32	43.8%	50.0%
D75	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.dc	11	18.2%	63.6%
D76	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb6	207	38.6%	56.0%
D77	Neo-Gruenfeld, 6.O-O	280	38.9%	52.7%
D78	Neo-Gruenfeld, 6.O-O c6	286	34.6%	55.1%
D79	Neo-Gruenfeld, 6.O-O, main line	185	38.9%	53.5%
D80	Gruenfeld defence	61	21.3%	53.3%
D80	Gruenfeld, Stockholm variation	140	30.7%	56.8%
D81	Gruenfeld, Russian variation	22	50.0%	47.7%
D82	Gruenfeld, 4.Bf4	167	36.5%	55.4%
D83	Gruenfeld, Gruenfeld gambit	19	31.6%	52.6%
D83	Gruenfeld, Gruenfeld gambit, Botvinnik variation	7	0.0%	42.9%
D83	Gruenfeld, Gruenfeld gambit, Capablanca variation	21	42.9%	50.0%
D84	Gruenfeld, Gruenfeld gambit accepted	23	34.8%	73.9%
D85	Gruenfeld, exchange variation	657	38.7%	55.1%
D85	Gruenfeld, modern exchange variation	3143	40.5%	55.9%
D86	Gruenfeld, exchange, Larsen variation	2	0.0%	0.0%
D86	Gruenfeld, exchange, Simagin's improved variation	67	29.9%	65.7%
D86	Gruenfeld, exchange, Simagin's lesser variation	21	57.1%	66.7%
D86	Gruenfeld, exchange, classical variation	395	37.5%	53.2%
D87	Gruenfeld, exchange, Seville variation	116	37.1%	62.5%
D87	Gruenfeld, exchange, Spassky variation	266	33.5%	56.6%
D88	Gruenfeld, Spassky variation, main line, 10...cd, 11.cd	92	47.8%	57.6%
D89	Gruenfeld, Spassky variation, main line, 13.Bd3	142	36.6%	53.5%
D89	Gruenfeld, exchange, Sokolsky variation	29	34.5%	34.5%
D90	Gruenfeld, Flohr variation	23	47.8%	58.7%
D90	Gruenfeld, Schlechter variation	7	14.3%	64.3%
D90	Gruenfeld, Three knights variation	141	34.0%	53.2%
D91	Gruenfeld, 5.Bg5	1367	34.2%	47.2%
D92	Gruenfeld, 5.Bf4	365	35.3%	55.8%
D93	Gruenfeld with Bf4 e3	234	41.5%	59.2%
D94	Gruenfeld with e3 Bd3	1	100.0%	50.0%
D94	Gruenfeld, 5.e3	321	36.1%	58.3%
D94	Gruenfeld, Flohr defence	17	23.5%	58.8%
D94	Gruenfeld, Makogonov variation	93	30.1%	50.5%
D94	Gruenfeld, Opovcensky variation	67	50.7%	52.2%
D94	Gruenfeld, Smyslov defence	97	40.2%	58.2%
D95	Gruenfeld with e3 & Qb3	34	44.1%	42.6%
D95	Gruenfeld, Botvinnik variation	57	33.3%	41.2%
D96	Gruenfeld, Russian variation	93	40.9%	53.8%
D97	Gruenfeld, Russian variation with e4	11	45.5%	59.1%
D97	Gruenfeld, Russian, Alekhine (Hungarian) variation	1616	30.0%	51.0%
D97	Gruenfeld, Russian, Byrne (Simagin) variation	111	35.1%	52.7%
D97	Gruenfeld, Russian, Prins variation	659	34.9%	53.7%
D97	Gruenfeld, Russian, Szabo (Boleslavsky) variation	65	23.1%	53.1%
D98	Gruenfeld, Russian, Keres variation	7	28.6%	57.1%
D98	Gruenfeld, Russian, Smyslov variation	174	35.1%	58.3%
D99	Gruenfeld defence, Smyslov, Yugoslav variation	51	39.2%	68.6%
D99	Gruenfeld defence, Smyslov, main line	201	32.8%	58.2%
E00	Catalan opening	1463	32.5%	54.5%
E00	Neo-Indian (Seirawan) attack	250	28.4%	50.2%
E00	Queen's pawn game	544	30.5%	55.5%
E01	Catalan, closed	206	37.9%	54.4%
E02	Catalan, open, 5.Qa4	23	39.1%	54.3%
E03	Catalan, open, 5.Qa4 Nbd7, 6.Qxc4	8	37.5%	43.8%
E03	Catalan, open, Alekhine variation	3	0.0%	0.0%
E04	Catalan, open, 5.Nf3	3075	35.8%	52.3%
E05	Catalan, open, classical line	105	37.1%	50.0%
E06	Catalan, closed, 5.Nf3	1667	37.0%	53.3%
E07	Catalan, closed, 6...Nbd7	34	23.5%	50.0%
E07	Catalan, closed, Botvinnik variation	31	16.1%	62.9%
E08	Catalan, closed, 7.Qc2	56	28.6%	55.4%
E08	Catalan, closed, Qc2 & b3	135	36.3%	56.7%
E08	Catalan, closed, Spassky gambit	1	0.0%	100.0%
E09	Catalan, closed, Sokolsky variation	1	0.0%	100.0%
E09	Catalan, closed, main line	142	38.0%	55.6%
E10	Blumenfeld counter-gambit	31	29.0%	59.7%
E10	Blumenfeld counter-gambit accepted	25	40.0%	52.0%
E10	Blumenfeld counter-gambit, Dus-Chotimursky variation	152	26.3%	59.9%
E10	Blumenfeld counter-gambit, Spielmann variation	16	31.3%	71.9%
E10	Doery defence	5	0.0%	20.0%
E10	Dzindzikhashvili defence	33	45.5%	43.9%
E10	Queen's pawn game	1865	34.4%	55.3%
E11	Bogo-Indian defence	1071	32.9%	55.7%
E11	Bogo-Indian defence, Gruenfeld variation	1120	33.0%	55.3%
E11	Bogo-Indian defence, Monticelli trap	3	0.0%	66.7%
E11	Bogo-Indian defence, Nimzovich variation	1363	30.2%	56.4%
E12	Queen's Indian defence	228	28.1%	51.3%
E12	Queen's Indian, 4.Nc3	2642	31.0%	51.3%
E12	Queen's Indian, 4.Nc3, Botvinnik variation	24	33.3%	50.0%
E12	Queen's Indian, Miles variation	133	27.8%	53.0%
E12	Queen's Indian, Petrosian system	4732	32.7%	53.0%
E13	Queen's Indian, 4.Nc3, main line	166	33.1%	55.1%
E14	Queen's Indian, 4.e3	692	31.9%	50.9%
E15	Queen's Indian, 4.g3	236	30.9%	54.9%
E15	Queen's Indian, 4.g3 Bb7	70	40.0%	57.1%
E15	Queen's Indian, Buerger variation	6	16.7%	25.0%
E15	Queen's Indian, Nimzovich variation (exaggerated fianchetto)	16654	30.2%	55.6%
E15	Queen's Indian, Rubinstein variation	35	20.0%	58.6%
E16	Queen's Indian, Capablanca variation	126	40.5%	50.4%
E16	Queen's Indian, Riumin variation	86	30.2%	53.5%
E16	Queen's Indian, Yates variation	177	30.5%	55.9%
E17	Queen's Indian, 5.Bg2 Be7	39	43.6%	55.1%
E17	Queen's Indian, Euwe variation	37	29.7%	66.2%
E17	Queen's Indian, Opovcensky variation	425	29.6%	58.8%
E17	Queen's Indian, anti-Queen's Indian system	133	42.1%	54.9%
E17	Queen's Indian, old main line, 6.O-O	260	29.6%	53.3%
E18	Queen's Indian, old main line, 7.Nc3	1066	34.6%	56.6%
E19	Queen's Indian, old main line, 9.Qxc3	738	34.7%	53.9%
E20	Nimzo-Indian defence	114	28.9%	45.2%
E20	Nimzo-Indian, Kmoch variation	270	26.7%	55.2%
E20	Nimzo-Indian, Romanishin-Kasparov (Steiner) system	207	39.1%	47.1%
E21	Nimzo-Indian, three knights variation	979	32.6%	51.4%
E21	Nimzo-Indian, three knights, Euwe variation	3	33.3%	50.0%
E21	Nimzo-Indian, three knights, Korchnoi variation	6	50.0%	75.0%
E22	Nimzo-Indian, Spielmann variation	34	26.5%	48.5%
E23	Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc6	6	0.0%	66.7%
E23	Nimzo-Indian, Spielmann, Karlsbad variation	9	55.6%	61.1%
E23	Nimzo-Indian, Spielmann, San Remo variation	1	100.0%	50.0%
E24	Nimzo-Indian, Saemisch variation	45	20.0%	56.7%
E25	Nimzo-Indian, Saemisch variation	40	35.0%	55.0%
E25	Nimzo-Indian, Saemisch, Keres variation	141	31.9%	51.4%
E25	Nimzo-Indian, Saemisch, Romanovsky variation	21	28.6%	52.4%
E26	Nimzo-Indian, Saemisch variation	19	26.3%	44.7%
E26	Nimzo-Indian, Saemisch, O'Kelly variation	10	0.0%	50.0%
E27	Nimzo-Indian, Saemisch variation	8	37.5%	31.3%
E28	Nimzo-Indian, Saemisch variation	27	22.2%	59.3%
E29	Nimzo-Indian, Saemisch, Capablanca variation	55	41.8%	44.5%
E29	Nimzo-Indian, Saemisch, main line	24	41.7%	54.2%
E30	Nimzo-Indian, Leningrad variation	198	26.3%	51.0%
E30	Nimzo-Indian, Leningrad, ...b5 gambit	13	38.5%	26.9%
E31	Nimzo-Indian, Leningrad, main line	53	28.3%	50.0%
E32	Nimzo-Indian, classical variation	5798	36.6%	51.8%
E32	Nimzo-Indian, classical, Adorjan gambit	66	28.8%	62.9%
E33	Nimzo-Indian, classical, 4...Nc6	42	23.8%	50.0%
E33	Nimzo-Indian, classical, Milner-Barry (Zurich) variation	147	34.0%	55.8%
E34	Nimzo-Indian, classical, Noa variation	269	39.8%	53.7%
E35	Nimzo-Indian, classical, Noa variation, 5.cd ed	216	35.2%	52.3%
E36	Nimzo-Indian, classical, Botvinnik variation	1	0.0%	100.0%
E36	Nimzo-Indian, classical, Noa variation, 5.a3	25	28.0%	70.0%
E37	Nimzo-Indian, classical, Noa variation, main line, 7.Qc2	68	35.3%	63.2%
E37	Nimzo-Indian, classical, San Remo variation	7	42.9%	35.7%
E38	Nimzo-Indian, classical, 4...c5	367	33.5%	59.5%
E39	Nimzo-Indian, classical, Pirc variation	847	35.3%	57.2%
E40	Nimzo-Indian, 4.e3	64	21.9%	60.9%
E40	Nimzo-Indian, 4.e3, Taimanov variation	30	13.3%	56.7%
E41	Nimzo-Indian, 4.e3 c5	642	34.0%	51.2%
E41	Nimzo-Indian, e3, Huebner variation	543	26.3%	46.3%
E42	Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein)	1312	33.3%	57.2%
E43	Nimzo-Indian, Fischer variation	286	31.1%	54.0%
E44	Nimzo-Indian, Fischer variation, 5.Ne2	356	28.9%	52.9%
E45	Nimzo-Indian, 4.e3, Bronstein (Byrne) variation	300	36.7%	54.0%
E46	Nimzo-Indian, 4.e3 O-O	16	18.8%	46.9%
E46	Nimzo-Indian, Reshevsky variation	508	29.3%	50.7%
E46	Nimzo-Indian, Simagin variation	32	31.3%	43.8%
E47	Nimzo-Indian, 4.e3 O-O, 5.Bd3	421	37.1%	56.5%
E48	Nimzo-Indian, 4.e3 O-O, 5.Bd3 d5	269	35.3%	48.9%
E49	Nimzo-Indian, 4.e3, Botvinnik system	215	32.6%	44.7%
E50	Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d5	18	27.8%	41.7%
E51	Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d5	39	41.0%	64.1%
E51	Nimzo-Indian, 4.e3, Ragozin variation	15	40.0%	46.7%
E52	Nimzo-Indian, 4.e3, main line with ...b6	169	29.6%	59.2%
E53	Nimzo-Indian, 4.e3, Gligoric system with 7...Nbd7	21	33.3%	59.5%
E53	Nimzo-Indian, 4.e3, Keres variation	25	32.0%	48.0%
E53	Nimzo-Indian, 4.e3, main line with ...c5	740	37.6%	52.3%
E54	Nimzo-Indian, 4.e3, Gligoric system with 7...dc	321	35.5%	52.6%
E54	Nimzo-Indian, 4.e3, Gligoric system, Smyslov variation	26	30.8%	57.7%
E55	Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation	1940	36.2%	53.9%
E56	Nimzo-Indian, 4.e3, main line with 7...Nc6	74	35.1%	47.3%
E58	Nimzo-Indian, 4.e3, main line with 8...Bxc3	1491	27.8%	50.7%
E59	Nimzo-Indian, 4.e3, main line	1671	30.9%	54.2%
E60	King's Indian defence	412	25.7%	53.6%
E60	King's Indian, 3.Nf3	1848	31.8%	54.7%
E60	King's Indian, 3.g3	570	30.7%	57.6%
E60	King's Indian, 3.g3, counterthrust variation	6	0.0%	50.0%
E60	King's Indian, Anti-Gruenfeld	27	14.8%	51.9%
E60	Queen's pawn, Mengarini attack	55	23.6%	53.6%
E61	King's Indian defence, 3.Nc3	485	24.9%	55.8%
E61	King's Indian, Smyslov system	56	28.6%	57.1%
E62	King's Indian, fianchetto variation	43	30.2%	50.0%
E62	King's Indian, fianchetto with ...Nc6	73	34.2%	59.6%
E62	King's Indian, fianchetto, Kavalek (Bronstein) variation	626	30.8%	58.9%
E62	King's Indian, fianchetto, Larsen system	156	37.8%	53.5%
E62	King's Indian, fianchetto, Simagin variation	49	24.5%	73.5%
E62	King's Indian, fianchetto, Uhlmann (Szabo) variation	136	36.0%	61.4%
E62	King's Indian, fianchetto, lesser Simagin (Spassky) variation	139	30.9%	61.5%
E63	King's Indian, fianchetto, Panno variation	1980	31.4%	57.4%
E64	King's Indian, fianchetto, Yugoslav system	36	22.2%	61.1%
E65	King's Indian, fianchetto, Yugoslav, 7.O-O	63	31.7%	54.0%
E66	King's Indian, fianchetto, Yugoslav Panno	198	29.8%	55.8%
E67	King's Indian, fianchetto with ...Nd7	39	25.6%	61.5%
E67	King's Indian, fianchetto, classical variation	272	34.9%	53.9%
E68	King's Indian, fianchetto, classical variation, 8.e4	1263	31.4%	57.0%
E69	King's Indian, fianchetto, classical main line	1072	30.2%	60.1%
E70	King's Indian, 4.e4	399	30.3%	56.3%
E70	King's Indian, Kramer system	58	31.0%	44.8%
E70	King's Indian, accelerated Averbakh system	40	35.0%	52.5%
E71	King's Indian, Makagonov system (5.h3)	281	28.5%	57.3%
E72	King's Indian with e4 & g3	20	25.0%	67.5%
E72	King's Indian, Pomar system	1	0.0%	0.0%
E73	King's Indian, 5.Be2	7	42.9%	35.7%
E73	King's Indian, Averbakh system	348	27.0%	51.4%
E73	King's Indian, Semi-Averbakh system	21	33.3%	59.5%
E74	King's Indian, Averbakh, 6...c5	52	25.0%	60.6%
E75	King's Indian, Averbakh, main line	20	15.0%	47.5%
E76	King's Indian, Four pawns attack	80	27.5%	52.5%
E76	King's Indian, Four pawns attack, dynamic line	61	26.2%	54.1%
E77	King's Indian, Four pawns attack	180	31.1%	50.6%
E77	King's Indian, Four pawns attack, Florentine gambit	3	0.0%	33.3%
E77	King's Indian, Six pawns attack	1	0.0%	100.0%
E78	King's Indian, Four pawns attack, with Be2 and Nf3	4	50.0%	50.0%
E79	King's Indian, Four pawns attack, main line	89	43.8%	55.6%
E80	King's Indian, Saemisch variation	58	25.9%	62.9%
E81	King's Indian, Saemisch, 5...O-O	1189	26.2%	54.4%
E81	King's Indian, Saemisch, Byrne variation	32	31.3%	46.9%
E82	King's Indian, Saemisch, double fianchetto variation	55	25.5%	52.7%
E83	King's Indian, Saemisch, 6...Nc6	13	38.5%	42.3%
E83	King's Indian, Saemisch, Panno formation	18	5.6%	63.9%
E83	King's Indian, Saemisch, Ruban variation	3	33.3%	50.0%
E84	King's Indian, Saemisch, Panno main line	531	28.6%	55.9%
E85	King's Indian, Saemisch, orthodox variation	14	28.6%	57.1%
E86	King's Indian, Saemisch, orthodox, 7.Nge2 c6	277	24.9%	53.6%
E87	King's Indian, Saemisch, orthodox, 7.d5	198	20.7%	65.4%
E87	King's Indian, Saemisch, orthodox, Bronstein variation	12	16.7%	41.7%
E88	King's Indian, Saemisch, orthodox, 7.d5 c6	387	28.4%	54.0%
E89	King's Indian, Saemisch, orthodox main line	27	18.5%	57.4%
E90	King's Indian, 5.Nf3	402	24.6%	53.9%
E90	King's Indian, Larsen variation	57	33.3%	50.0%
E90	King's Indian, Zinnowitz variation	15	26.7%	60.0%
E91	King's Indian, 6.Be2	315	30.5%	56.8%
E91	King's Indian, Kazakh variation	351	32.2%	58.3%
E92	King's Indian, Andersson variation	131	49.6%	50.0%
E92	King's Indian, Gligoric-Taimanov system	1381	26.2%	57.3%
E92	King's Indian, Petrosian system	56	17.9%	51.8%
E92	King's Indian, Petrosian system, Stein variation	826	27.8%	51.7%
E92	King's Indian, classical variation	9	22.2%	33.3%
E93	King's Indian, Petrosian system, Keres variation	21	33.3%	40.5%
E93	King's Indian, Petrosian system, main line	80	31.3%	56.9%
E94	King's Indian, orthodox variation	1274	31.8%	56.0%
E94	King's Indian, orthodox, 7...Nbd7	1857	27.3%	57.3%
E94	King's Indian, orthodox, Donner variation	77	26.0%	64.9%
E95	King's Indian, orthodox, 7...Nbd7, 8.Re1	506	31.2%	58.1%
E96	King's Indian, orthodox, 7...Nbd7, main line	232	33.2%	56.7%
E97	King's Indian, orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)	3648	26.9%	55.2%
E97	King's Indian, orthodox, Aronin-Taimanov, bayonet attack	3244	28.9%	57.3%
E98	King's Indian, orthodox, Aronin-Taimanov, 9.Ne1	3474	21.1%	58.0%
E99	King's Indian, orthodox, Aronin-Taimanov, Benko attack	90	23.3%	46.1%
E99	King's Indian, orthodox, Aronin-Taimanov, main line	145	18.6%	59.0%