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
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%
A00	Benko's opening	541	38.3%	51.1%
A00	Benko's opening, reversed Alekhine	12	33.3%	50.0%
A00	Clemenz (Mead's, Basman's or de Klerk's) opening	2	100.0%	50.0%
A00	Dunst (Sleipner, Heinrichsen) opening	14	14.3%	57.1%
A00	Durkin's attack	4	50.0%	25.0%
A00	Grob's attack	3	33.3%	50.0%
A00	Mieses opening	3	66.7%	66.7%
A00	Novosibirsk opening	1	100.0%	50.0%
A00	Polish (Sokolsky) opening	39	35.9%	38.5%
A00	Polish, Outflank variation	7	28.6%	71.4%
A00	Saragossa opening	14	42.9%	57.1%
A00	Van't Kruijs opening	12	33.3%	58.3%
A01	Nimzovich-Larsen attack	29	24.1%	46.6%
A01	Nimzovich-Larsen attack, Dutch variation	8	0.0%	75.0%
A01	Nimzovich-Larsen attack, English variation	17	29.4%	55.9%
A01	Nimzovich-Larsen attack, Indian variation	45	22.2%	48.9%
A01	Nimzovich-Larsen attack, classical variation	56	42.9%	51.8%
A01	Nimzovich-Larsen attack, modern variation	119	33.6%	54.6%
A01	Nimzovich-Larsen attack, symmetrical variation	3	0.0%	33.3%
A02	Bird's opening	28	28.6%	57.1%
A02	Bird, From gambit, Lasker variation	1	0.0%	100.0%
A03	Bird's opening	13	46.2%	38.5%
A03	Bird's opening, Lasker variation	1	100.0%	50.0%
A04	Reti opening	2458	36.7%	53.9%
A04	Reti v Dutch	249	30.1%	58.4%
A04	Reti, Lisitsin gambit deferred	2	50.0%	25.0%
A04	Reti, Pirc-Lisitsin gambit	54	35.2%	56.5%
A04	Reti, Wade defence	2	0.0%	50.0%
A05	Reti opening	1077	37.6%	53.4%
A05	Reti, King's Indian attack	277	41.9%	54.5%
A05	Reti, King's Indian attack, Reti-Smyslov variation	24	45.8%	56.3%
A05	Reti, King's Indian attack, Spassky's variation	95	43.2%	51.1%
A06	Reti opening	324	35.8%	51.9%
A06	Reti, Nimzovich-Larsen attack	252	35.3%	49.0%
A06	Reti, old Indian attack	25	28.0%	38.0%
A06	Santasiere's folly	13	23.1%	50.0%
A06	Tennison (Lemberg, Zukertort) gambit	1	0.0%	100.0%
A07	Reti, King's Indian attack	162	32.1%	48.1%
A07	Reti, King's Indian attack (Barcza system)	1546	40.9%	53.1%
A07	Reti, King's Indian attack (with ...c5)	83	39.8%	56.0%
A07	Reti, King's Indian attack, Keres variation	158	39.9%	52.8%
A07	Reti, King's Indian attack, Pachman system	75	48.0%	54.7%
A07	Reti, King's Indian attack, Yugoslav variation	567	38.1%	52.2%
A08	Reti, King's Indian attack	230	39.6%	51.5%
A08	Reti, King's Indian attack, French variation	145	34.5%	46.2%
A09	Reti accepted	57	47.4%	48.2%
A09	Reti accepted, Keres variation	13	23.1%	73.1%
A09	Reti opening	48	41.7%	54.2%
A09	Reti, advance variation	128	38.3%	46.5%
A10	English opening	623	43.3%	53.9%
A10	English, Adorjan defence	38	47.4%	52.6%
A10	English, Anglo-Dutch defense	77	36.4%	51.9%
A10	English, Jaenisch gambit	2	0.0%	100.0%
A11	English, Caro-Kann defensive system	218	42.2%	57.3%
A12	English, Bled variation	8	37.5%	68.8%
A12	English, Capablanca's variation	29	31.0%	43.1%
A12	English, Caro-Kann defensive system	20	40.0%	50.0%
A12	English, Caro-Kann defensive system, Bogolyubov variation	9	33.3%	72.2%
A12	English, London defensive system	24	33.3%	37.5%
A12	English, New York (London) defensive system	4	50.0%	50.0%
A12	English, Torre defensive system	16	56.3%	46.9%
A13	English opening	641	34.2%	50.9%
A13	English opening, Agincourt variation	274	41.6%	53.6%
A13	English, Kurajica defence	11	36.4%	45.5%
A13	English, Neo-Catalan	105	48.6%	58.6%
A13	English, Neo-Catalan accepted	204	42.2%	56.9%
A13	English, Romanishin gambit	35	48.6%	64.3%
A13	English, Wimpey system	34	47.1%	50.0%
A14	English, Neo-Catalan declined	174	35.6%	51.7%
A14	English, Symmetrical, Keres defence	260	44.6%	56.9%
A15	English opening	2087	39.4%	53.5%
A15	English, 1...Nf6 (Anglo-Indian defense)	265	35.1%	56.4%
A16	English opening	280	28.6%	50.4%
A16	English, Anglo-Gruenfeld defense	39	35.9%	56.4%
A16	English, Anglo-Gruenfeld, Czech defense	40	37.5%	71.3%
A16	English, Anglo-Gruenfeld, Smyslov defense	18	38.9%	69.4%
A17	English opening	73	41.1%	54.8%
A17	English, Nimzo-English opening	395	38.0%	56.7%
A17	English, Queens Indian formation	46	37.0%	55.4%
A17	English, Queens Indian, Romanishin variation	14	28.6%	64.3%
A18	English, Mikenas-Carls variation	2	50.0%	75.0%
A18	English, Mikenas-Carls, Flohr variation	40	32.5%	61.3%
A18	English, Mikenas-Carls, Kevitz variation	1	100.0%	50.0%
A19	English, Mikenas-Carls, Sicilian variation	44	38.6%	60.2%
A20	English opening	1577	36.8%	54.5%
A20	English, Nimzovich variation	25	20.0%	66.0%
A20	English, Nimzovich, Flohr variation	77	44.2%	49.4%
A21	English opening	458	30.1%	58.1%
A21	English, Keres variation	6	33.3%	50.0%
A21	English, Kramnik-Shirov counterattack	151	35.1%	51.3%
A21	English, Smyslov defence	13	30.8%	38.5%
A21	English, Troeger defence	45	28.9%	47.8%
A22	English opening	157	29.3%	52.2%
A22	English, Bellon gambit	6	50.0%	58.3%
A22	English, Bremen, Smyslov system	372	38.2%	47.3%
A22	English, Bremen, reverse dragon	176	40.3%	48.6%
A22	English, Carls' Bremen system	66	33.3%	60.6%
A23	English, Bremen system, Keres variation	60	26.7%	63.3%
A24	English, Bremen system with ...g6	16	56.3%	53.1%
A25	English, Sicilian reversed	162	34.6%	48.1%
A25	English, closed system	271	35.1%	55.9%
A25	English, closed system (without ...d6)	58	22.4%	56.0%
A25	English, closed, 5.Rb1	118	41.5%	53.8%
A25	English, closed, 5.Rb1 Taimanov variation	2	0.0%	50.0%
A25	English, closed, Hort variation	2	50.0%	25.0%
A25	English, closed, Taimanov variation	11	18.2%	63.6%
A26	English, Botvinnik system	100	42.0%	49.0%
A26	English, closed system	83	32.5%	58.4%
A27	English, three knights system	75	24.0%	61.3%
A28	English, Bradley Beach variation	24	20.8%	39.6%
A28	English, Nenarokov variation	23	52.2%	69.6%
A28	English, four knights system	113	36.3%	47.3%
A28	English, four knights, 4.e3	366	36.3%	53.4%
A28	English, four knights, Capablanca variation	107	37.4%	52.3%
A28	English, four knights, Marini variation	148	38.5%	45.6%
A28	English, four knights, Nimzovich variation	55	30.9%	44.5%
A28	English, four knights, Romanishin variation	148	45.9%	56.1%
A28	English, four knights, Stean variation	40	45.0%	57.5%
A29	English, four knights, kingside fianchetto	2290	38.1%	52.1%
A30	English, symmetrical variation	1304	35.7%	55.9%
A30	English, symmetrical, hedgehog system	1042	41.7%	55.7%
A30	English, symmetrical, hedgehog, flexible formation	121	47.9%	54.5%
A31	English, symmetrical, Benoni formation	235	39.1%	58.3%
A32	English, symmetrical variation	63	36.5%	59.5%
A33	English, symmetrical variation	411	47.9%	56.1%
A33	English, symmetrical, Geller variation	245	33.5%	58.4%
A34	English, symmetrical variation	391	33.2%	53.7%
A34	English, symmetrical, Rubinstein system	42	26.2%	51.2%
A34	English, symmetrical, three knights system	300	37.3%	56.7%
A35	English, symmetrical variation	68	26.5%	57.4%
A35	English, symmetrical, four knights system	618	41.4%	51.3%
A36	English, symmetrical variation	35	25.7%	67.1%
A36	English, symmetrical, Botvinnik system	16	31.3%	59.4%
A36	English, symmetrical, Botvinnik system reversed	20	30.0%	65.0%
A36	English, ultra-symmetrical variation	358	32.4%	54.2%
A37	English, symmetrical variation	152	36.2%	53.0%
A37	English, symmetrical, Botvinnik system reversed	170	28.8%	52.1%
A38	English, symmetrical variation	266	42.9%	55.6%
A38	English, symmetrical, main line with b3	1	100.0%	50.0%
A38	English, symmetrical, main line with d3	37	43.2%	45.9%
A39	English, symmetrical, main line with d4	241	41.9%	58.7%
A40	Beefeater defence	10	30.0%	85.0%
A40	Modern defence	156	31.4%	64.4%
A40	Polish defence	19	52.6%	42.1%
A40	Queen's pawn	937	37.4%	55.5%
A40	Queen's pawn, Charlick (Englund) gambit	1	100.0%	50.0%
A40	Queen's pawn, English defence	21	28.6%	71.4%
A40	Queen's pawn, Franco-Indian (Keres) defence	173	34.7%	52.6%
A40	Queen's pawn, Keres defence	329	39.8%	59.1%
A40	Queen's pawn, Lundin (Kevitz-Mikenas) defence	29	24.1%	67.2%
A41	Modern defence	6	33.3%	66.7%
A41	Old Indian defence	118	28.0%	57.2%
A41	Old Indian, Tartakower (Wade) variation	244	33.2%	58.4%
A41	Queen's Pawn	393	35.9%	52.5%
A41	Robatsch defence, Rossolimo variation	31	38.7%	51.6%
A42	Modern defence, Averbakh system	50	34.0%	63.0%
A42	Modern defence, Averbakh system, Kotov variation	5	20.0%	70.0%
A42	Pterodactyl defence	278	34.9%	64.2%
A43	Hawk (Habichd) defence	1	0.0%	0.0%
A43	Old Benoni defence	323	30.7%	60.5%
A43	Old Benoni, Franco-Benoni defence	8	37.5%	68.8%
A43	Old Benoni, Mujannah formation	4	25.0%	87.5%
A43	Old Benoni, Schmid's system	6	0.0%	16.7%
A44	Old Benoni defence	4	100.0%	50.0%
A44	Semi-Benoni (`blockade variation')	20	25.0%	57.5%
A45	Blackmar-Diemer gambit	24	20.8%	52.1%
A45	Canard opening	11	36.4%	27.3%
A45	Queen's pawn game	549	39.9%	53.8%
A45	Trompovsky attack (Ruth, Opovcensky opening)	588	31.6%	53.7%
A46	Queen's pawn game	680	34.3%	56.4%
A46	Queen's pawn, Torre attack	341	34.9%	47.4%
A46	Queen's pawn, Torre attack, Wagner gambit	1	0.0%	100.0%
A46	Queen's pawn, Yusupov-Rubinstein system	125	31.2%	55.6%
A47	Queen's Indian defence	145	35.9%	56.6%
A47	Queen's Indian, Marienbad system	32	34.4%	51.6%
A47	Queen's Indian, Marienbad system, Berg variation	4	25.0%	37.5%
A48	King's Indian, East Indian defence	269	34.6%	51.5%
A48	King's Indian, London system	133	41.4%	47.0%
A48	King's Indian, Torre attack	344	39.0%	50.0%
A49	King's Indian, fianchetto without c4	328	38.1%	58.1%
A50	Kevitz-Trajkovich defence	61	42.6%	45.9%
A50	Queen's Indian accelerated	23	26.1%	56.5%
A50	Queen's pawn game	136	36.8%	57.4%
A51	Budapest defence declined	2	0.0%	50.0%
A51	Budapest, Fajarowicz variation	8	0.0%	62.5%
A52	Budapest defence	3	66.7%	66.7%
A52	Budapest, Adler variation	41	41.5%	50.0%
A52	Budapest, Alekhine variation	2	0.0%	50.0%
A52	Budapest, Alekhine, Abonyi variation	7	42.9%	35.7%
A52	Budapest, Rubinstein variation	127	40.9%	64.6%
A53	Old Indian defence	269	37.5%	57.1%
A53	Old Indian, Janowski variation	13	15.4%	69.2%
A54	Old Indian, Ukrainian variation	17	52.9%	67.6%
A54	Old Indian, Ukrainian variation, 4.Nf3	50	44.0%	62.0%
A55	Old Indian, main line	132	47.0%	64.4%
A56	Benoni defence	199	32.7%	57.5%
A56	Benoni defence, Hromodka system	198	21.2%	64.6%
A56	Czech Benoni defence	40	20.0%	72.5%
A56	Czech Benoni, King's Indian system	9	11.1%	38.9%
A56	Vulture defence	1	100.0%	50.0%
A57	Benko gambit	122	24.6%	61.5%
A57	Benko gambit half accepted	212	35.8%	50.9%
A57	Benko gambit, Zaitsev system	22	31.8%	38.6%
A58	Benko gambit accepted	165	38.8%	54.5%
A58	Benko gambit, fianchetto variation	50	38.0%	63.0%
A59	Benko gambit	13	46.2%	38.5%
A59	Benko gambit, 7.e4	2	50.0%	25.0%
A59	Benko gambit, Ne2 variation	2	0.0%	50.0%
A59	Benko gambit, main line	54	37.0%	63.0%
A60	Benoni defence	20	30.0%	70.0%
A61	Benoni defence	150	22.7%	67.3%
A61	Benoni, Nimzovich (knight's tour) variation	133	21.1%	64.7%
A61	Benoni, Uhlmann variation	161	21.1%	37.3%
A61	Benoni, fianchetto variation	4	0.0%	100.0%
A62	Benoni, fianchetto variation	118	33.1%	58.1%
A63	Benoni, fianchetto, 9...Nbd7	20	40.0%	65.0%
A64	Benoni, fianchetto, 11...Re8	43	34.9%	43.0%
A65	Benoni, 6.e4	21	19.0%	38.1%
A67	Benoni, Taimanov variation	19	10.5%	73.7%
A69	Benoni, four pawns attack, main line	14	57.1%	57.1%
A70	Benoni, classical with e4 and Nf3	186	34.4%	54.3%
A70	Benoni, classical without 9.O-O	1	0.0%	0.0%
A71	Benoni, classical, 8.Bg5	42	14.3%	50.0%
A72	Benoni, classical without 9.O-O	20	20.0%	75.0%
A73	Benoni, classical, 9.O-O	19	21.1%	73.7%
A74	Benoni, classical, 9...a6, 10.a4	2	0.0%	50.0%
A75	Benoni, classical with ...a6 and 10...Bg4	22	18.2%	68.2%
A76	Benoni, classical, 9...Re8	31	35.5%	56.5%
A77	Benoni, classical, 9...Re8, 10.Nd2	59	27.1%	67.8%
A78	Benoni, classical with ...Re8 and ...Na6	13	38.5%	50.0%
A79	Benoni, classical, 11.f3	27	33.3%	53.7%
A80	Dutch	374	36.9%	55.6%
A80	Dutch, 2.Bg5 variation	84	38.1%	54.8%
A80	Dutch, Manhattan (Alapin, Ulvestad) variation	1	100.0%	50.0%
A81	Dutch defence	784	36.6%	56.4%
A81	Dutch defence, Blackburne variation	5	20.0%	30.0%
A82	Dutch, Balogh defence	1	0.0%	100.0%
A82	Dutch, Staunton gambit	2	50.0%	25.0%
A82	Dutch, Staunton gambit, Tartakower variation	2	50.0%	25.0%
A83	Dutch, Staunton gambit, Alekhine variation	1	0.0%	0.0%
A83	Dutch, Staunton gambit, Chigorin variation	3	33.3%	16.7%
A83	Dutch, Staunton gambit, Lasker variation	1	0.0%	100.0%
A83	Dutch, Staunton gambit, Staunton's line	14	50.0%	60.7%
A84	Dutch defence	165	38.2%	56.7%
A84	Dutch defence, Rubinstein variation	77	40.3%	55.2%
A84	Dutch, Staunton gambit deferred	8	75.0%	37.5%
A85	Dutch with c4 & Nc3	58	36.2%	50.9%
A86	Dutch with c4 & g3	17	41.2%	61.8%
A86	Dutch, Leningrad variation	20	55.0%	62.5%
A87	Dutch, Leningrad, main variation	106	46.2%	53.3%
A88	Dutch, Leningrad, main variation with c6	246	31.3%	59.1%
A89	Dutch, Leningrad, main variation with Nc6	153	41.2%	65.7%
A90	Dutch defence	236	40.7%	59.7%
A90	Dutch defence, Dutch-Indian (Nimzo-Dutch) variation	33	33.3%	65.2%
A90	Dutch-Indian, Alekhine variation	16	31.3%	59.4%
A91	Dutch defence	16	37.5%	62.5%
A92	Dutch defence	9	55.6%	72.2%
A92	Dutch defence, Alekhine variation	14	21.4%	75.0%
A92	Dutch, stonewall variation	32	46.9%	67.2%
A93	Dutch, stonewall, Botwinnik variation	32	21.9%	54.7%
A94	Dutch, stonewall with Ba3	22	50.0%	65.9%
A95	Dutch, stonewall with Nc3	33	24.2%	60.6%
A95	Dutch, stonewall: Chekhover variation	1	100.0%	50.0%
A96	Dutch, classical variation	53	30.2%	62.3%
A97	Dutch, Ilyin-Genevsky variation	5	20.0%	30.0%
A97	Dutch, Ilyin-Genevsky, Winter variation	36	44.4%	66.7%
A98	Dutch, Ilyin-Genevsky variation with Qc2	10	40.0%	50.0%
A99	Dutch, Ilyin-Genevsky variation with b3	44	36.4%	63.6%
B00	KP, Nimzovich defence	56	32.1%	62.5%
B00	KP, Nimzovich defence, Bogolyubov variation	6	16.7%	75.0%
B00	King's pawn opening	240	34.6%	56.5%
B00	Lemming defence	2	50.0%	25.0%
B00	Owen defence	46	37.0%	59.8%
B00	Reversed Grob (Borg/Basman defence/macho Grob)	5	20.0%	90.0%
B01	Scandinavian (centre counter) defence	188	38.3%	55.9%
B01	Scandinavian defence	80	38.8%	56.9%
B01	Scandinavian defence, Gruenfeld variation	3	33.3%	50.0%
B01	Scandinavian defence, Lasker variation	18	38.9%	58.3%
B01	Scandinavian gambit	29	48.3%	55.2%
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	10	50.0%	55.0%
B01	Scandinavian, Marshall variation	118	41.5%	65.7%
B01	Scandinavian, Pytel-Wade variation	52	46.2%	61.5%
B02	Alekhine's defence	25	40.0%	52.0%
B02	Alekhine's defence, Brooklyn defence	5	20.0%	30.0%
B02	Alekhine's defence, Kmoch variation	2	50.0%	75.0%
B02	Alekhine's defence, Maroczy variation	15	26.7%	60.0%
B02	Alekhine's defence, Saemisch attack	8	62.5%	43.8%
B02	Alekhine's defence, Scandinavian variation	21	38.1%	57.1%
B02	Alekhine's defence, Spielmann variation	4	50.0%	25.0%
B02	Alekhine's defence, Two pawns' (Lasker's) attack	27	59.3%	63.0%
B03	Alekhine's defence	4	50.0%	75.0%
B03	Alekhine's defence, Balogh variation	2	0.0%	100.0%
B03	Alekhine's defence, O'Sullivan gambit	4	50.0%	50.0%
B03	Alekhine's defence, exchange variation	63	34.9%	50.8%
B03	Alekhine's defence, exchange, Karpov variation	1	100.0%	50.0%
B03	Alekhine's defence, four pawns attack	11	27.3%	59.1%
B03	Alekhine's defence, four pawns attack, 7.Be3	20	50.0%	75.0%
B03	Alekhine's defence, four pawns attack, Trifunovic variation	3	0.0%	100.0%
B03	Alekhine's defence, four pawns attack, fianchetto variation	4	0.0%	50.0%
B04	Alekhine's defence, modern variation	35	28.6%	65.7%
B04	Alekhine's defence, modern, Keres variation	21	47.6%	61.9%
B04	Alekhine's defence, modern, Larsen variation	51	37.3%	63.7%
B04	Alekhine's defence, modern, Schmid variation	15	40.0%	53.3%
B04	Alekhine's defence, modern, fianchetto variation	42	19.0%	71.4%
B05	Alekhine's defence, modern variation, 4...Bg4	156	30.8%	64.7%
B05	Alekhine's defence, modern, Alekhine variation	1	100.0%	50.0%
B05	Alekhine's defence, modern, Flohr variation	13	30.8%	61.5%
B06	Robatsch (modern) defence	1230	35.9%	57.6%
B06	Robatsch defence	184	35.3%	60.1%
B06	Robatsch defence, Gurgenidze variation	21	38.1%	57.1%
B06	Robatsch defence, Pseudo-Austrian attack	106	24.5%	65.1%
B06	Robatsch defence, Two knights variation	115	41.7%	64.3%
B06	Robatsch defence, Two knights, Suttles variation	676	38.8%	57.8%
B06	Robatsch defence, three pawns attack	7	57.1%	42.9%
B07	Pirc defence	191	38.2%	55.8%
B07	Pirc, 150 attack	78	44.9%	57.1%
B07	Pirc, Byrne variation	75	33.3%	59.3%
B07	Pirc, Holmov system	24	70.8%	60.4%
B07	Pirc, Sveshnikov system	60	26.7%	53.3%
B07	Pirc, Ufimtsev-Pytel variation	90	30.0%	63.9%
B07	Pirc, bayonet (Mariotti) attack	7	57.1%	57.1%
B07	Robatsch defence, Geller's system	230	35.7%	60.9%
B08	Pirc, classical (two knights) system	127	35.4%	65.0%
B08	Pirc, classical system, 5.Be2	567	37.2%	57.1%
B08	Pirc, classical, h3 system	93	33.3%	54.3%
B09	Pirc, Austrian attack	50	40.0%	62.0%
B09	Pirc, Austrian attack, 6.Bd3	327	37.0%	61.6%
B09	Pirc, Austrian attack, 6.Be3	63	31.7%	58.7%
B09	Pirc, Austrian attack, 6.e5	24	45.8%	60.4%
B09	Pirc, Austrian attack, Ljubojevic variation	5	20.0%	70.0%
B09	Pirc, Austrian attack, dragon formation	142	44.4%	59.5%
B10	Caro-Kann defence	516	31.8%	57.8%
B10	Caro-Kann, Goldman (Spielmann) variation	6	16.7%	25.0%
B10	Caro-Kann, Two knights variation	78	38.5%	59.0%
B10	Caro-Kann, anti-Caro-Kann defence	206	29.1%	59.7%
B10	Caro-Kann, anti-anti-Caro-Kann defence	253	41.9%	52.2%
B10	Caro-Kann, closed (Breyer) variation	112	33.0%	50.4%
B11	Caro-Kann, Two knights, 3...Bg4	164	32.9%	50.0%
B12	Caro-Kann defence	96	37.5%	56.3%
B12	Caro-Kann, 3.Nd2	75	36.0%	50.0%
B12	Caro-Kann, Edinburgh variation	6	33.3%	50.0%
B12	Caro-Kann, Tartakower (fantasy) variation	133	39.8%	54.5%
B12	Caro-Kann, advance variation	1545	33.2%	56.0%
B12	Caro-Kann, advance, Short variation	5	40.0%	60.0%
B12	de Bruycker defence	3	0.0%	66.7%
B13	Caro-Kann, Panov-Botvinnik attack	148	49.3%	52.4%
B13	Caro-Kann, Panov-Botvinnik, Czerniak variation	6	33.3%	33.3%
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	18	38.9%	58.3%
B13	Caro-Kann, exchange variation	147	45.6%	50.0%
B13	Caro-Kann, exchange, Rubinstein variation	33	39.4%	37.9%
B14	Caro-Kann, Panov-Botvinnik attack, 5...e6	635	43.0%	53.0%
B14	Caro-Kann, Panov-Botvinnik attack, 5...g6	74	44.6%	52.0%
B15	Caro-Kann defence	59	27.1%	59.3%
B15	Caro-Kann, Alekhine gambit	3	33.3%	83.3%
B15	Caro-Kann, Forgacs variation	65	30.8%	53.8%
B15	Caro-Kann, Gurgenidze counter-attack	5	40.0%	60.0%
B15	Caro-Kann, Gurgenidze system	114	33.3%	57.9%
B15	Caro-Kann, Rasa-Studier gambit	4	50.0%	25.0%
B15	Caro-Kann, Tartakower (Nimzovich) variation	36	30.6%	56.9%
B16	Caro-Kann, Bronstein-Larsen variation	51	29.4%	59.8%
B17	Caro-Kann, Steinitz variation	1078	38.0%	53.4%
B18	Caro-Kann, classical variation	203	36.9%	54.9%
B18	Caro-Kann, classical, 6.h4	124	32.3%	54.0%
B18	Caro-Kann, classical, Flohr variation	8	25.0%	50.0%
B18	Caro-Kann, classical, Maroczy attack	6	33.3%	33.3%
B19	Caro-Kann, classical, 7...Nd7	24	50.0%	45.8%
B19	Caro-Kann, classical, Spassky variation	1238	37.8%	55.8%
B20	Sicilian defence	392	35.5%	51.1%
B20	Sicilian, Keres variation (2.Ne2)	62	40.3%	58.9%
B20	Sicilian, Steinitz variation	154	42.9%	46.8%
B20	Sicilian, wing gambit	2	50.0%	75.0%
B20	Sicilian, wing gambit, Carlsbad variation	2	0.0%	50.0%
B21	Sicilian, Grand Prix attack	223	36.8%	50.7%
B21	Sicilian, Smith-Morra gambit	20	50.0%	55.0%
B22	Sicilian, 2.c3, Heidenfeld variation	2	50.0%	75.0%
B22	Sicilian, Alapin's variation (2.c3)	1538	38.0%	54.5%
B23	Sicilian, Grand Prix attack	94	31.9%	48.9%
B23	Sicilian, Grand Prix attack, Schofman variation	4	50.0%	50.0%
B23	Sicilian, chameleon variation	70	37.1%	61.4%
B23	Sicilian, closed	640	33.9%	52.0%
B23	Sicilian, closed, 2...Nc6	209	41.6%	57.2%
B23	Sicilian, closed, Korchnoi variation	20	40.0%	50.0%
B24	Sicilian, closed	91	30.8%	51.6%
B24	Sicilian, closed, Smyslov variation	2	0.0%	100.0%
B25	Sicilian, closed	50	38.0%	55.0%
B25	Sicilian, closed, 6.Ne2 e5 (Botvinnik)	13	38.5%	50.0%
B25	Sicilian, closed, 6.f4	73	41.1%	50.7%
B25	Sicilian, closed, 6.f4 e5 (Botvinnik)	15	46.7%	56.7%
B26	Sicilian, closed, 6.Be3	95	32.6%	50.0%
B27	Sicilian defence	2	50.0%	75.0%
B27	Sicilian, Hungarian variation	2621	40.1%	59.1%
B27	Sicilian, Katalimov variation	6	50.0%	58.3%
B27	Sicilian, Quinteros variation	8	25.0%	87.5%
B28	Sicilian, O'Kelly variation	32	40.6%	51.6%
B29	Sicilian, Nimzovich-Rubinstein variation	20	25.0%	57.5%
B29	Sicilian, Nimzovich-Rubinstein; Rubinstein counter-gambit	13	23.1%	42.3%
B30	Sicilian defence	562	38.4%	52.1%
B30	Sicilian, Nimzovich-Rossolimo attack (without ...d6)	889	34.9%	58.5%
B31	Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6)	606	37.8%	55.4%
B31	Sicilian, Nimzovich-Rossolimo attack, Gurgenidze variation	2	100.0%	50.0%
B32	Sicilian defence	193	31.6%	57.3%
B32	Sicilian, Flohr variation	70	38.6%	60.7%
B32	Sicilian, Labourdonnais-Loewenthal (Kalashnikov) variation	429	37.8%	60.1%
B32	Sicilian, Labourdonnais-Loewenthal variation	47	51.1%	55.3%
B32	Sicilian, Nimzovich variation	8	25.0%	37.5%
B33	Sicilian defence	182	34.6%	52.5%
B33	Sicilian, Pelikan (Lasker/Sveshnikov) variation	177	27.1%	54.2%
B33	Sicilian, Pelikan, Bird variation	83	43.4%	55.4%
B33	Sicilian, Pelikan, Chelyabinsk variation	1015	32.5%	58.6%
B33	Sicilian, Sveshnikov variation	634	35.3%	51.7%
B34	Sicilian, accelerated fianchetto, exchange variation	1	0.0%	100.0%
B34	Sicilian, accelerated fianchetto, modern variation	146	35.6%	54.1%
B35	Sicilian, accelerated fianchetto, modern variation with Bc4	785	42.8%	52.0%
B36	Sicilian, accelerated fianchetto, Gurgenidze variation	117	35.0%	62.8%
B36	Sicilian, accelerated fianchetto, Maroczy bind	360	44.2%	57.6%
B37	Sicilian, accelerated fianchetto, Maroczy bind, 5...Bg7	68	51.5%	59.6%
B37	Sicilian, accelerated fianchetto, Simagin variation	2	100.0%	50.0%
B38	Sicilian, accelerated fianchetto, Maroczy bind, 6.Be3	715	41.8%	57.6%
B39	Sicilian, accelerated fianchetto, Breyer variation	392	38.5%	56.8%
B40	Sicilian defence	1268	35.2%	54.4%
B40	Sicilian, Anderssen variation	216	32.4%	58.3%
B40	Sicilian, Marshall variation	1	0.0%	100.0%
B40	Sicilian, Pin variation (Sicilian counter-attack)	1	0.0%	100.0%
B40	Sicilian, Pin, Koch variation	11	18.2%	72.7%
B41	Sicilian, Kan variation	61	37.7%	58.2%
B41	Sicilian, Kan, Maroczy bind (Reti variation)	91	29.7%	52.2%
B41	Sicilian, Kan, Maroczy bind - Bronstein variation	9	44.4%	44.4%
B42	Sicilian, Kan, 5.Bd3	556	34.4%	56.6%
B42	Sicilian, Kan, Gipslis variation	43	32.6%	58.1%
B42	Sicilian, Kan, Polugaievsky variation	340	37.6%	55.3%
B42	Sicilian, Kan, Swiss cheese variation	44	36.4%	61.4%
B43	Sicilian, Kan, 5.Nc3	586	35.3%	55.7%
B44	Sicilian defence	149	40.3%	48.3%
B44	Sicilian, Szen (`anti-Taimanov') variation	242	41.3%	50.8%
B44	Sicilian, Szen variation, Dely-Kasparov gambit	2	0.0%	50.0%
B44	Sicilian, Szen, hedgehog variation	141	35.5%	53.2%
B45	Sicilian, Taimanov variation	856	37.5%	57.3%
B45	Sicilian, Taimanov, American attack	6	33.3%	33.3%
B46	Sicilian, Taimanov variation	1332	38.0%	55.0%
B47	Sicilian, Taimanov (Bastrikov) variation	1938	38.2%	54.6%
B48	Sicilian, Taimanov variation	1037	34.9%	52.8%
B49	Sicilian, Taimanov variation	288	40.3%	56.6%
B50	Sicilian	622	36.0%	55.8%
B51	Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack	320	41.9%	54.1%
B52	Sicilian, Canal-Sokolsky attack, 3...Bd7	265	38.1%	50.4%
B52	Sicilian, Canal-Sokolsky attack, Bronstein gambit	34	29.4%	61.8%
B52	Sicilian, Canal-Sokolsky attack, Sokolsky variation	155	46.5%	56.1%
B53	Sicilian, Chekhover variation	139	36.7%	52.2%
B53	Sicilian, Chekhover, Zaitsev variation	8	12.5%	68.8%
B54	Sicilian	300	35.3%	55.0%
B54	Sicilian, Prins (Moscow) variation	98	35.7%	55.6%
B55	Sicilian, Prins variation, Venice attack	9	44.4%	66.7%
B56	Sicilian	443	34.5%	53.4%
B56	Sicilian, Venice attack	29	51.7%	46.6%
B57	Sicilian, Magnus Smith trap	5	40.0%	40.0%
B57	Sicilian, Sozin, Benko variation	509	37.9%	49.2%
B57	Sicilian, Sozin, not Scheveningen	57	40.4%	53.5%
B58	Sicilian, Boleslavsky variation	212	35.4%	47.4%
B58	Sicilian, Boleslavsky, Louma variation	1	0.0%	100.0%
B58	Sicilian, classical	74	40.5%	44.6%
B59	Sicilian, Boleslavsky variation, 7.Nb3	32	25.0%	50.0%
B60	Sicilian, Richter-Rauzer	72	30.6%	61.1%
B60	Sicilian, Richter-Rauzer, Bondarevsky variation	6	33.3%	33.3%
B60	Sicilian, Richter-Rauzer, Larsen variation	27	18.5%	61.1%
B61	Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2	117	31.6%	56.8%
B62	Sicilian, Richter-Rauzer, 6...e6	22	31.8%	56.8%
B62	Sicilian, Richter-Rauzer, Keres variation	33	21.2%	53.0%
B62	Sicilian, Richter-Rauzer, Margate (Alekhine) variation	19	31.6%	47.4%
B62	Sicilian, Richter-Rauzer, Podvebrady variation	13	61.5%	38.5%
B63	Sicilian, Richter-Rauzer, Rauzer attack	41	26.8%	59.8%
B63	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7	399	30.1%	55.4%
B64	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9.f4	169	39.6%	49.4%
B64	Sicilian, Richter-Rauzer, Rauzer attack, Geller variation	7	42.9%	64.3%
B65	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9...Nxd4	266	37.6%	59.0%
B66	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6	4069	32.3%	51.6%
B67	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 8...Bd7	1242	30.6%	55.0%
B68	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 9...Be7	48	35.4%	63.5%
B69	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 11.Bxf6	77	32.5%	63.0%
B70	Sicilian, dragon variation	184	35.9%	49.5%
B71	Sicilian, dragon, Levenfish variation	7	28.6%	57.1%
B72	Sicilian, dragon, 6.Be3	14	35.7%	53.6%
B72	Sicilian, dragon, classical attack	6	50.0%	41.7%
B72	Sicilian, dragon, classical, Amsterdam variation	14	35.7%	46.4%
B72	Sicilian, dragon, classical, Grigoriev variation	12	25.0%	45.8%
B72	Sicilian, dragon, classical, Nottingham variation	8	50.0%	50.0%
B73	Sicilian, dragon, classical, 8.O-O	93	46.2%	51.1%
B73	Sicilian, dragon, classical, Richter variation	38	31.6%	60.5%
B73	Sicilian, dragon, classical, Zollner gambit	6	50.0%	58.3%
B74	Sicilian, dragon, classical, 9.Nb3	72	43.1%	50.7%
B74	Sicilian, dragon, classical, Alekhine variation	6	16.7%	75.0%
B74	Sicilian, dragon, classical, Reti-Tartakower variation	29	34.5%	65.5%
B74	Sicilian, dragon, classical, Spielmann variation	8	37.5%	56.3%
B75	Sicilian, dragon, Yugoslav attack	63	34.9%	63.5%
B76	Sicilian, dragon, Yugoslav attack, 7...O-O	68	23.5%	51.5%
B76	Sicilian, dragon, Yugoslav attack, Rauser variation	271	27.3%	66.8%
B77	Sicilian, dragon, Yugoslav attack, 9...Bd7	104	41.3%	58.2%
B77	Sicilian, dragon, Yugoslav attack, 9.Bc4	22	36.4%	54.5%
B78	Sicilian, dragon, Yugoslav attack, 10.O-O-O	93	23.7%	49.5%
B79	Sicilian, dragon, Yugoslav attack, 12.h4	9	22.2%	55.6%
B80	Sicilian, Scheveningen variation	442	31.0%	54.2%
B80	Sicilian, Scheveningen, English variation	74	27.0%	55.4%
B80	Sicilian, Scheveningen, Vitolins variation	3	66.7%	33.3%
B80	Sicilian, Scheveningen, fianchetto variation	85	37.6%	43.5%
B81	Sicilian, Scheveningen, Keres attack	995	30.3%	61.3%
B82	Sicilian, Scheveningen, 6.f4	171	32.2%	57.6%
B82	Sicilian, Scheveningen, Tal variation	33	27.3%	71.2%
B83	Sicilian, Scheveningen, 6.Be2	282	39.0%	51.8%
B83	Sicilian, modern Scheveningen	166	39.2%	47.9%
B83	Sicilian, modern Scheveningen, main line	176	43.2%	57.4%
B83	Sicilian, modern Scheveningen, main line with Nb3	31	32.3%	64.5%
B84	Sicilian, Scheveningen (Paulsen), classical variation	1876	36.4%	49.9%
B84	Sicilian, Scheveningen, classical, Nd7 system	17	29.4%	55.9%
B85	Sicilian, Scheveningen, classical	90	37.8%	54.4%
B85	Sicilian, Scheveningen, classical main line	192	42.7%	54.2%
B85	Sicilian, Scheveningen, classical, Maroczy system	17	35.3%	52.9%
B86	Sicilian, Sozin attack	37	35.1%	44.6%
B87	Sicilian, Sozin with ...a6 and ...b5	408	35.8%	53.4%
B88	Sicilian, Sozin, Fischer variation	8	50.0%	62.5%
B88	Sicilian, Sozin, Leonhardt variation	222	39.6%	57.7%
B89	Sicilian, Sozin, 7.Be3	524	32.3%	51.6%
B89	Sicilian, Velimirovic attack	387	28.7%	50.8%
B90	Sicilian, Najdorf	612	30.7%	52.0%
B90	Sicilian, Najdorf, Adams attack	21	52.4%	64.3%
B90	Sicilian, Najdorf, Byrne (English) attack	6646	30.6%	53.0%
B90	Sicilian, Najdorf, Lipnitzky attack	243	31.3%	49.8%
B91	Sicilian, Najdorf, Zagreb (fianchetto) variation	123	35.0%	54.9%
B92	Sicilian, Najdorf, Opovcensky variation	1421	37.8%	52.3%
B93	Sicilian, Najdorf, 6.f4	552	40.8%	51.0%
B94	Sicilian, Najdorf, 6.Bg5	50	24.0%	62.0%
B95	Sicilian, Najdorf, 6...e6	74	29.7%	40.5%
B96	Sicilian, Najdorf, 7.f4	152	37.5%	44.4%
B96	Sicilian, Najdorf, Polugayevsky variation	20	40.0%	45.0%
B96	Sicilian, Najdorf, Polugayevsky, Simagin variation	15	26.7%	53.3%
B97	Sicilian, Najdorf, 7...Qb6	379	25.6%	44.7%
B97	Sicilian, Najdorf, Poisoned pawn variation	557	44.2%	48.5%
B98	Sicilian, Najdorf variation	64	32.8%	61.7%
B98	Sicilian, Najdorf, 7...Be7	60	40.0%	51.7%
B98	Sicilian, Najdorf, Browne variation	18	22.2%	77.8%
B98	Sicilian, Najdorf, Goteborg (Argentine) variation	12	25.0%	45.8%
B99	Sicilian, Najdorf, 7...Be7 main line	339	24.5%	54.4%
C00	French defence	150	34.7%	56.7%
C00	French defence, Steiner variation	183	43.7%	50.8%
C00	French, Alapin variation	2	100.0%	50.0%
C00	French, Chigorin variation	247	32.8%	49.6%
C00	French, King's Indian attack	743	39.7%	50.8%
C00	French, Labourdonnais variation	161	31.1%	42.9%
C00	French, Pelikan variation	35	34.3%	48.6%
C00	French, Reti (Spielmann) variation	8	50.0%	50.0%
C00	French, Reversed Philidor formation	6	33.3%	66.7%
C00	French, Schlechter variation	88	43.2%	45.5%
C00	French, Steinitz attack	3	0.0%	33.3%
C00	French, Two knights variation	48	31.3%	55.2%
C00	French, Wing gambit	4	25.0%	62.5%
C00	Lengfellner system	1	0.0%	100.0%
C00	St. George defence	15	60.0%	70.0%
C01	French, exchange variation	443	39.1%	53.6%
C01	French, exchange, Svenonius variation	7	42.9%	35.7%
C02	French, advance variation	270	26.3%	55.7%
C02	French, advance, Euwe variation	287	35.2%	55.6%
C02	French, advance, Milner-Barry gambit	9	66.7%	55.6%
C02	French, advance, Nimzovich system	13	46.2%	30.8%
C02	French, advance, Paulsen attack	299	34.4%	53.3%
C02	French, advance, Steinitz variation	86	30.2%	38.4%
C02	French, advance, Wade variation	58	31.0%	65.5%
C03	French, Tarrasch	458	39.7%	57.9%
C03	French, Tarrasch, Guimard variation	22	22.7%	65.9%
C04	French, Tarrasch, Guimard main line	69	18.8%	57.2%
C05	French, Tarrasch, Botvinnik variation	13	15.4%	61.5%
C05	French, Tarrasch, closed variation	293	32.4%	57.2%
C06	French, Tarrasch, Leningrad variation	8	12.5%	93.8%
C06	French, Tarrasch, closed variation, main line	560	37.1%	59.8%
C07	French, Tarrasch, Eliskases variation	14	28.6%	42.9%
C07	French, Tarrasch, open variation	1020	47.4%	51.8%
C08	French, Tarrasch, open, 4.ed ed	488	49.6%	54.3%
C09	French, Tarrasch, open variation, main line	495	46.7%	57.7%
C10	French, Fort Knox variation	281	34.9%	52.0%
C10	French, Frere (Becker) variation	7	28.6%	71.4%
C10	French, Paulsen variation	275	26.9%	54.9%
C10	French, Rubinstein variation	414	45.7%	53.7%
C10	French, Rubinstein, Capablanca line	2	50.0%	75.0%
C11	French defence	77	31.2%	50.6%
C11	French, Burn variation	1414	38.3%	55.2%
C11	French, Henneberger variation	9	33.3%	61.1%
C11	French, Steinitz variation	200	35.0%	57.5%
C11	French, Steinitz, Boleslavsky variation	676	33.6%	56.0%
C11	French, Steinitz, Bradford attack	1	100.0%	50.0%
C11	French, Steinitz, Gledhill attack	1	100.0%	50.0%
C11	French, Swiss variation	32	37.5%	56.3%
C12	French, MacCutcheon variation	44	36.4%	47.7%
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	99	23.2%	56.1%
C12	French, MacCutcheon, Lasker variation, 8...g6	136	30.9%	56.6%
C12	French, MacCutcheon, advance variation	12	25.0%	20.8%
C13	French, Albin-Alekhine-Chatard attack	15	20.0%	56.7%
C13	French, Albin-Alekhine-Chatard attack, Breyer variation	7	42.9%	64.3%
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%
C13	French, classical	7	42.9%	35.7%
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%
C13	French, classical, Tartakower variation	1	0.0%	100.0%
C13	French, classical, Vistaneckis (Nimzovich) variation	8	0.0%	75.0%
C14	French, classical variation	1	100.0%	50.0%
C14	French, classical, Alapin variation	8	37.5%	68.8%
C14	French, classical, Pollock variation	2	50.0%	75.0%
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	149	33.6%	57.0%
C14	French, classical, Tarrasch variation	2	0.0%	50.0%
C15	French, Winawer (Nimzovich) variation	151	33.1%	55.6%
C15	French, Winawer, Alekhine (Maroczy) gambit	39	43.6%	57.7%
C15	French, Winawer, Alekhine gambit, Kan variation	32	56.3%	40.6%
C15	French, Winawer, fingerslip variation	6	50.0%	25.0%
C16	French, Winawer, Petrosian variation	41	24.4%	61.0%
C16	French, Winawer, advance variation	244	35.2%	57.0%
C17	French, Winawer, advance variation	23	39.1%	71.7%
C17	French, Winawer, advance, 5.a3	126	27.8%	61.5%
C17	French, Winawer, advance, Bogolyubov variation	168	31.0%	50.0%
C17	French, Winawer, advance, Russian variation	13	46.2%	38.5%
C18	French, Winawer, advance variation	45	24.4%	65.6%
C18	French, Winawer, classical variation	73	27.4%	53.4%
C19	French, Winawer, advance, 6...Ne7	72	37.5%	57.6%
C19	French, Winawer, advance, Smyslov variation	51	23.5%	68.6%
C19	French, Winawer, advance, poisoned pawn variation	1107	32.1%	60.1%
C19	French, Winawer, advance, poisoned pawn, Euwe-Gligoric variation	2	0.0%	0.0%
C19	French, Winawer, advance, poisoned pawn, Konstantinopolsky variation	173	25.4%	65.9%
C19	French, Winawer, advance, positional main line	529	27.2%	55.0%
C20	Alapin's opening	7	14.3%	64.3%
C20	KP, King's head opening	1	100.0%	50.0%
C20	KP, Lopez opening	2	50.0%	25.0%
C20	King's pawn game	2	0.0%	50.0%
C21	Centre game	62	45.2%	71.0%
C21	Danish gambit	2	50.0%	75.0%
C22	Centre game	3	33.3%	16.7%
C22	Centre game, Berger variation	73	27.4%	68.5%
C22	Centre game, Paulsen attack	3	0.0%	66.7%
C23	Bishop's opening	90	34.4%	57.2%
C23	Bishop's opening, Calabrese counter-gambit, Jaenisch variation	3	0.0%	100.0%
C23	Bishop's opening, Classical variation	28	32.1%	51.8%
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, Berlin defence	146	36.3%	53.8%
C24	Bishop's opening, Urusov gambit	9	22.2%	33.3%
C25	Vienna gambit	6	50.0%	58.3%
C25	Vienna game	101	33.7%	55.4%
C25	Vienna, Paulsen variation	22	27.3%	77.3%
C25	Vienna, Pierce gambit	3	100.0%	50.0%
C26	Vienna game	48	31.3%	63.5%
C26	Vienna, Falkbeer variation	10	40.0%	40.0%
C26	Vienna, Mengarini variation	3	33.3%	16.7%
C26	Vienna, Paulsen-Mieses variation	82	40.2%	50.6%
C27	Boden-Kieseritsky gambit	2	50.0%	75.0%
C27	Boden-Kieseritsky gambit, Lichtenhein defence	4	50.0%	25.0%
C27	Vienna game	10	20.0%	40.0%
C27	Vienna, Alekhine variation	4	25.0%	62.5%
C28	Vienna game	61	34.4%	45.1%
C29	Vienna gambit	18	22.2%	50.0%
C29	Vienna gambit, Breyer variation	19	47.4%	71.1%
C29	Vienna gambit, Kaufmann variation	2	0.0%	50.0%
C30	KGD, 2...Nf6	2	50.0%	25.0%
C30	KGD, Keene's defence	3	33.3%	83.3%
C30	KGD, classical variation	16	31.3%	65.6%
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%
C30	King's gambit	2	0.0%	100.0%
C31	KGD, Nimzovich counter-gambit	5	80.0%	60.0%
C32	KGD, Falkbeer, Keres variation	1	0.0%	100.0%
C33	KGA, Keres (Mason-Steinitz) gambit	1	0.0%	0.0%
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	13	30.8%	46.2%
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%
C34	KGA, Becker defence	1	0.0%	100.0%
C34	KGA, Bonsch-Osmolovsky variation	2	0.0%	50.0%
C34	KGA, Fischer defence	10	30.0%	55.0%
C34	KGA, Schallop defence	6	33.3%	66.7%
C34	King's knight's gambit	1	100.0%	50.0%
C35	KGA, Cunningham defence	4	0.0%	50.0%
C35	KGA, Cunningham, Euwe defence	3	33.3%	50.0%
C36	KGA, Abbazia defence (classical defence, modern defence[!])	3	0.0%	100.0%
C36	KGA, Abbazia defence, modern variation	10	30.0%	55.0%
C37	KGA, Blachly gambit	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%
C38	KGA, Hanstein gambit	1	0.0%	0.0%
C38	King's knight's gambit	4	0.0%	0.0%
C39	KGA, Allgaier, Walker attack	1	0.0%	0.0%
C39	KGA, Kieseritsky, Berlin defence	5	40.0%	20.0%
C39	KGA, Kieseritsky, Berlin defence, 6.Bc4	7	14.3%	7.1%
C39	KGA, Kieseritsky, Kolisch defence	8	62.5%	56.3%
C39	KGA, Kieseritsky, Paulsen defence	2	0.0%	50.0%
C39	KGA, Kieseritsky, Rice gambit	9	11.1%	38.9%
C39	KGA, Kieseritsky, long whip (Stockwhip, classical) defence	1	0.0%	0.0%
C40	Gunderam defence	38	28.9%	64.5%
C40	Latvian, Fraser defence	1	100.0%	50.0%
C40	Latvian, Polerio variation	4	75.0%	62.5%
C40	QP counter-gambit (elephant gambit)	2	50.0%	75.0%
C41	Philidor's defence	45	37.8%	52.2%
C41	Philidor, Hanham variation	3	66.7%	66.7%
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	11	9.1%	59.1%
C41	Philidor, Hanham, Steiner variation	9	44.4%	44.4%
C41	Philidor, Improved Hanham variation	167	36.5%	59.6%
C41	Philidor, Larsen variation	8	50.0%	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	12	50.0%	66.7%
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	75	34.7%	52.0%
C42	Petrov three knights game	64	21.9%	62.5%
C42	Petrov's defence	92	39.1%	51.1%
C42	Petrov, Cochrane gambit	5	40.0%	40.0%
C42	Petrov, Cozio (Lasker) attack	126	40.5%	57.5%
C42	Petrov, Damiano variation	1	0.0%	100.0%
C42	Petrov, French attack	1	100.0%	50.0%
C42	Petrov, Italian variation	38	26.3%	55.3%
C42	Petrov, Kaufmann attack	60	43.3%	41.7%
C42	Petrov, Nimzovich attack	92	42.4%	61.4%
C42	Petrov, Paulsen attack	35	25.7%	55.7%
C42	Petrov, classical attack	142	44.4%	55.3%
C42	Petrov, classical attack, Berger variation	7	57.1%	71.4%
C42	Petrov, classical attack, Chigorin variation	212	36.3%	55.9%
C42	Petrov, classical attack, Jaenisch variation	784	43.1%	59.1%
C42	Petrov, classical attack, Krause variation	1	0.0%	100.0%
C42	Petrov, classical attack, Marshall variation	466	38.6%	56.7%
C42	Petrov, classical attack, Mason variation	24	29.2%	56.3%
C42	Petrov, classical attack, Tarrasch variation	1	0.0%	100.0%
C42	Petrov, classical attack, close variation	39	33.3%	65.4%
C43	Petrov, Urusov gambit	4	75.0%	62.5%
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	541	39.4%	50.6%
C43	Petrov, modern attack, Trifunovic variation	26	50.0%	51.9%
C43	Petrov, modern attack, main line	83	36.1%	61.4%
C44	Inverted Hanham	9	22.2%	55.6%
C44	King's pawn game	3	33.3%	50.0%
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	55	38.2%	50.0%
C44	Scotch gambit	13	38.5%	42.3%
C44	Scotch gambit, Anderssen (Paulsen, Suhle) counter-attack	5	40.0%	20.0%
C44	Scotch gambit, Benima defence	3	33.3%	50.0%
C44	Scotch gambit, Dubois-Reti defence	100	35.0%	49.5%
C44	Scotch, Goering gambit	20	40.0%	45.0%
C44	Scotch, Lolli variation	11	45.5%	50.0%
C44	Scotch, Relfsson gambit ('MacLopez')	1	0.0%	100.0%
C45	Scotch game	953	38.2%	53.4%
C45	Scotch, Blackburne attack	1	0.0%	0.0%
C45	Scotch, Blumenfeld attack	13	46.2%	30.8%
C45	Scotch, Ghulam Kassim variation	2	100.0%	50.0%
C45	Scotch, Horwitz attack	12	25.0%	70.8%
C45	Scotch, Meitner variation	3	100.0%	50.0%
C45	Scotch, Mieses variation	455	33.2%	54.6%
C45	Scotch, Potter variation	19	47.4%	55.3%
C45	Scotch, Romanishin variation	8	50.0%	75.0%
C45	Scotch, Schmidt variation	207	58.5%	43.2%
C45	Scotch, Steinitz variation	4	0.0%	75.0%
C45	Scotch, Tartakower variation	2	50.0%	25.0%
C46	Four knights game	161	50.3%	48.1%
C46	Four knights, Gunsberg variation	12	58.3%	37.5%
C46	Four knights, Italian variation	33	36.4%	48.5%
C46	Four knights, Schultze-Mueller gambit	1	0.0%	100.0%
C46	Three knights game	45	33.3%	54.4%
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%
C47	Four knights, Belgrade gambit	4	75.0%	62.5%
C47	Four knights, Scotch variation	5	40.0%	60.0%
C47	Four knights, Scotch, 4...exd4	123	48.0%	54.1%
C47	Four knights, Scotch, Krause variation	10	40.0%	60.0%
C48	Four knights, Bardeleben variation	1	100.0%	50.0%
C48	Four knights, Ranken variation	2	50.0%	75.0%
C48	Four knights, Rubinstein counter-gambit	332	37.0%	56.5%
C48	Four knights, Rubinstein counter-gambit, Bogolyubov variation	2	0.0%	50.0%
C48	Four knights, Rubinstein counter-gambit, Henneberger variation	12	50.0%	33.3%
C48	Four knights, Rubinstein counter-gambit, exchange variation	41	65.9%	59.8%
C48	Four knights, Spanish variation	36	50.0%	58.3%
C48	Four knights, Spanish, classical defence	11	9.1%	40.9%
C48	Four knights, Spielmann variation	1	0.0%	0.0%
C49	Four knights	14	57.1%	57.1%
C49	Four knights, Janowski variation	7	28.6%	57.1%
C49	Four knights, Nimzovich (Paulsen) variation	14	57.1%	57.1%
C49	Four knights, double Ruy Lopez	11	45.5%	68.2%
C49	Four knights, symmetrical variation	83	36.1%	57.8%
C49	Four knights, symmetrical, Capablanca variation	7	57.1%	57.1%
C49	Four knights, symmetrical, Maroczy system	27	40.7%	53.7%
C49	Four knights, symmetrical, Metger unpin	166	36.7%	53.9%
C49	Four knights, symmetrical, Pillsbury variation	8	37.5%	31.3%
C50	Giuoco Pianissimo	329	37.4%	51.5%
C50	Giuoco Pianissimo, Canal variation	91	46.2%	56.0%
C50	Giuoco Pianissimo, Italian four knights variation	130	39.2%	51.2%
C50	Giuoco Piano	45	44.4%	51.1%
C50	Giuoco Piano, four knights variation	11	18.2%	45.5%
C50	Hungarian defence	37	21.6%	59.5%
C50	King's pawn game	123	33.3%	58.1%
C51	Evans gambit declined	1	0.0%	100.0%
C51	Evans gambit declined, 5.a4	98	36.7%	42.9%
C51	Evans gambit declined, Showalter variation	1	0.0%	0.0%
C51	Evans gambit, 5...Be7	1	0.0%	0.0%
C51	Evans gambit, Cordel variation	8	75.0%	50.0%
C51	Evans gambit, Goering attack	2	0.0%	50.0%
C51	Evans gambit, Morphy attack	5	40.0%	20.0%
C51	Evans gambit, Paulsen variation	15	20.0%	70.0%
C51	Evans gambit, Stone-Ware variation	3	66.7%	66.7%
C51	Evans gambit, normal variation	3	0.0%	33.3%
C52	Evans gambit	18	38.9%	47.2%
C52	Evans gambit, Lasker defence	5	20.0%	30.0%
C52	Evans gambit, Richardson attack	3	33.3%	16.7%
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%
C53	Giuoco Piano	771	36.2%	56.0%
C53	Giuoco Piano, Anderssen variation	3	33.3%	50.0%
C53	Giuoco Piano, Bird's attack	56	26.8%	52.7%
C53	Giuoco Piano, LaBourdonnais variation	1	0.0%	0.0%
C53	Giuoco Piano, Mestel variation	1	100.0%	50.0%
C53	Giuoco Piano, centre-holding variation	4	75.0%	37.5%
C53	Giuoco Piano, close variation	2	0.0%	100.0%
C54	Giuoco Piano	36	47.2%	48.6%
C54	Giuoco Piano, Moeller (Therkatz) attack	13	46.2%	23.1%
C54	Giuoco Piano, Moeller, bayonet attack	1	0.0%	100.0%
C55	Giuoco piano	2	0.0%	50.0%
C55	Two knights defence	14	42.9%	64.3%
C55	Two knights defence (Modern bishop's opening)	350	36.0%	57.7%
C55	Two knights defence, Perreux variation	6	50.0%	58.3%
C55	Two knights, Max Lange attack, Steinitz variation	4	25.0%	87.5%
C56	Two knights defence	27	51.9%	48.1%
C56	Two knights defence, Canal variation	2	100.0%	50.0%
C56	Two knights defence, Yurdansky attack	1	0.0%	0.0%
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, Lolli attack	1	0.0%	100.0%
C57	Two knights defence, Ulvestad variation	5	40.0%	20.0%
C58	Two knights defence	26	38.5%	61.5%
C58	Two knights defence, Blackburne variation	2	0.0%	100.0%
C58	Two knights defence, Paoli variation	5	40.0%	60.0%
C59	Two knights defence	95	42.1%	55.8%
C59	Two knights defence, Goering variation	4	25.0%	12.5%
C59	Two knights defence, Steinitz variation	224	27.7%	50.4%
C60	Ruy Lopez (Spanish opening)	8	62.5%	43.8%
C60	Ruy Lopez, Cozio defence	25	32.0%	52.0%
C60	Ruy Lopez, Cozio defence, Paulsen variation	2	0.0%	50.0%
C60	Ruy Lopez, fianchetto (Smyslov/Barnes) defence	58	34.5%	53.4%
C61	Ruy Lopez, Bird's defence	29	34.5%	58.6%
C62	Ruy Lopez, old Steinitz defence	129	27.1%	56.2%
C62	Ruy Lopez, old Steinitz defence, Nimzovich attack	3	0.0%	33.3%
C63	Ruy Lopez, Schliemann defence	6	0.0%	50.0%
C63	Ruy Lopez, Schliemann defence, Berger variation	36	30.6%	59.7%
C64	Ruy Lopez, Cordel gambit	10	40.0%	30.0%
C64	Ruy Lopez, classical (Cordel) defence	66	31.8%	55.3%
C64	Ruy Lopez, classical defence, 4.c3	32	31.3%	62.5%
C64	Ruy Lopez, classical defence, Benelux variation	196	36.7%	56.1%
C64	Ruy Lopez, classical defence, Charousek variation	2	50.0%	75.0%
C65	Ruy Lopez, Berlin defence	218	29.8%	47.9%
C65	Ruy Lopez, Berlin defence, 4.O-O	27	33.3%	46.3%
C65	Ruy Lopez, Berlin defence, Beverwijk variation	146	32.9%	52.7%
C65	Ruy Lopez, Berlin defence, Duras variation	6	16.7%	41.7%
C65	Ruy Lopez, Berlin defence, Kaufmann variation	3	66.7%	66.7%
C65	Ruy Lopez, Berlin defence, Nyholm attack	23	47.8%	63.0%
C66	Ruy Lopez, Berlin defence, 4.O-O, d6	58	53.4%	50.9%
C66	Ruy Lopez, Berlin defence, hedgehog variation	73	56.2%	59.6%
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%
C67	Ruy Lopez, Berlin defence, Cordel variation	7	14.3%	50.0%
C67	Ruy Lopez, Berlin defence, Minckwitz variation	8	50.0%	62.5%
C67	Ruy Lopez, Berlin defence, Pillsbury variation	1	0.0%	0.0%
C67	Ruy Lopez, Berlin defence, Rosenthal variation	5	40.0%	80.0%
C67	Ruy Lopez, Berlin defence, Trifunovic variation	2	0.0%	100.0%
C67	Ruy Lopez, Berlin defence, Winawer attack	12	25.0%	79.2%
C67	Ruy Lopez, Berlin defence, Zukertort variation	3	33.3%	50.0%
C67	Ruy Lopez, Berlin defence, open variation	904	42.9%	52.9%
C67	Ruy Lopez, open Berlin defence, 5...Be7	23	30.4%	54.3%
C67	Ruy Lopez, open Berlin defence, Showalter variation	2	50.0%	25.0%
C67	Ruy Lopez, open Berlin defence, l'Hermet variation	9	44.4%	33.3%
C68	Ruy Lopez, exchange variation	28	46.4%	51.8%
C68	Ruy Lopez, exchange, Alekhine variation	6	50.0%	25.0%
C68	Ruy Lopez, exchange, Keres variation	25	76.0%	46.0%
C68	Ruy Lopez, exchange, Romanovsky variation	5	40.0%	60.0%
C69	Ruy Lopez, exchange variation, 5.O-O	133	34.6%	49.6%
C69	Ruy Lopez, exchange variation, Alapin gambit	22	31.8%	47.7%
C69	Ruy Lopez, exchange, Bronstein variation	131	27.5%	51.1%
C69	Ruy Lopez, exchange, Gligoric variation	179	35.2%	67.3%
C70	Ruy Lopez	2	0.0%	50.0%
C70	Ruy Lopez, Alapin's defence deferred	15	33.3%	76.7%
C70	Ruy Lopez, Caro variation	16	31.3%	53.1%
C70	Ruy Lopez, Classical defence deferred	66	45.5%	54.5%
C70	Ruy Lopez, Cozio defence deferred	2	50.0%	25.0%
C70	Ruy Lopez, Graz variation	4	100.0%	50.0%
C70	Ruy Lopez, Schliemann defence deferred	1	0.0%	100.0%
C70	Ruy Lopez, Taimanov (chase/wing/accelerated counterthrust) variation	66	27.3%	66.7%
C70	Ruy Lopez, fianchetto defence deferred	2	50.0%	25.0%
C71	Ruy Lopez, modern Steinitz defence	32	37.5%	59.4%
C71	Ruy Lopez, modern Steinitz defence, Duras (Keres) variation	38	34.2%	48.7%
C71	Ruy Lopez, modern Steinitz defence, Three knights variation	8	50.0%	50.0%
C72	Ruy Lopez, modern Steinitz defence, 5.O-O	102	41.2%	59.8%
C73	Ruy Lopez, modern Steinitz defence, Alapin variation	28	28.6%	60.7%
C73	Ruy Lopez, modern Steinitz defence, Richter variation	39	43.6%	52.6%
C74	Ruy Lopez, Siesta, Kopayev variation	21	23.8%	50.0%
C74	Ruy Lopez, modern Steinitz defence	12	33.3%	58.3%
C74	Ruy Lopez, modern Steinitz defence, siesta variation	7	42.9%	64.3%
C75	Ruy Lopez, modern Steinitz defence	30	50.0%	55.0%
C75	Ruy Lopez, modern Steinitz defence, Rubinstein variation	24	25.0%	58.3%
C76	Ruy Lopez, modern Steinitz defence, fianchetto (Bronstein) variation	119	35.3%	54.6%
C77	Ruy Lopez, Anderssen variation	110	47.3%	53.6%
C77	Ruy Lopez, Morphy defence	110	40.9%	57.7%
C77	Ruy Lopez, Morphy defence, Duras variation	5	40.0%	60.0%
C77	Ruy Lopez, Treybal (Bayreuth) variation (exchange var. deferred)	22	59.1%	56.8%
C77	Ruy Lopez, Wormald (Alapin) attack	64	26.6%	57.0%
C77	Ruy Lopez, Wormald attack, Gruenfeld variation	2	100.0%	50.0%
C77	Ruy Lopez, four knights (Tarrasch) variation	42	38.1%	50.0%
C78	Ruy Lopez, ...b5 & ...d6	9	11.1%	61.1%
C78	Ruy Lopez, 5.O-O	275	43.3%	60.5%
C78	Ruy Lopez, Archangelsk (counterthrust) variation	293	37.5%	55.6%
C78	Ruy Lopez, Moeller defence	217	37.3%	53.7%
C78	Ruy Lopez, Wing attack	2	0.0%	100.0%
C79	Ruy Lopez, Steinitz defence deferred (Russian defence)	108	34.3%	54.2%
C79	Ruy Lopez, Steinitz defence deferred, Lipnitsky variation	9	55.6%	61.1%
C79	Ruy Lopez, Steinitz defence deferred, Rubinstein variation	8	50.0%	37.5%
C80	Ruy Lopez, open (Tarrasch) defence	40	35.0%	60.0%
C80	Ruy Lopez, open, 6.d4	10	30.0%	35.0%
C80	Ruy Lopez, open, 7.Bb3	41	41.5%	54.9%
C80	Ruy Lopez, open, 8...Be6	307	33.2%	47.9%
C80	Ruy Lopez, open, Berger variation	2	100.0%	50.0%
C80	Ruy Lopez, open, Bernstein variation	182	39.0%	65.7%
C80	Ruy Lopez, open, Bernstein variation, Karpov gambit	13	30.8%	46.2%
C80	Ruy Lopez, open, Friess attack	6	16.7%	41.7%
C80	Ruy Lopez, open, Harksen gambit	1	0.0%	100.0%
C80	Ruy Lopez, open, Riga variation	6	83.3%	58.3%
C80	Ruy Lopez, open, Schlechter defence	4	50.0%	50.0%
C80	Ruy Lopez, open, Tartakower variation	2	0.0%	50.0%
C80	Ruy Lopez, open, Zukertort variation	2	0.0%	50.0%
C81	Ruy Lopez, open, Howell attack	21	42.9%	50.0%
C81	Ruy Lopez, open, Howell attack, Adam variation	1	0.0%	0.0%
C82	Ruy Lopez, open, Berlin variation	6	33.3%	50.0%
C82	Ruy Lopez, open, Dilworth variation	22	40.9%	52.3%
C82	Ruy Lopez, open, Italian variation	11	18.2%	72.7%
C82	Ruy Lopez, open, Motzko attack	7	42.9%	50.0%
C82	Ruy Lopez, open, Motzko attack, Nenarokov variation	2	50.0%	75.0%
C82	Ruy Lopez, open, St. Petersburg variation	50	36.0%	58.0%
C83	Ruy Lopez, open, 9...Be7, 10.Re1	11	36.4%	54.5%
C83	Ruy Lopez, open, Malkin variation	6	50.0%	75.0%
C83	Ruy Lopez, open, classical defence	53	43.4%	51.9%
C84	Ruy Lopez, closed defence	520	39.0%	52.6%
C84	Ruy Lopez, closed, Basque gambit (North Spanish variation)	2	50.0%	25.0%
C84	Ruy Lopez, closed, centre attack	22	45.5%	54.5%
C85	Ruy Lopez, Exchange variation doubly deferred (DERLD)	543	35.7%	49.4%
C86	Ruy Lopez, Worrall attack	9	66.7%	55.6%
C86	Ruy Lopez, Worrall attack, sharp line	57	28.1%	54.4%
C86	Ruy Lopez, Worrall attack, solid line	29	41.4%	58.6%
C87	Ruy Lopez, closed, Averbach variation	113	35.4%	60.2%
C88	Ruy Lopez, Trajkovic counter-attack	17	23.5%	52.9%
C88	Ruy Lopez, closed	433	38.1%	52.5%
C88	Ruy Lopez, closed, 7...O-O	1081	35.3%	54.6%
C88	Ruy Lopez, closed, 7...d6, 8.d4	9	22.2%	11.1%
C88	Ruy Lopez, closed, 8.c3	2	0.0%	0.0%
C88	Ruy Lopez, closed, Balla variation	12	41.7%	62.5%
C88	Ruy Lopez, closed, anti-Marshall 8.a4	543	36.1%	51.2%
C89	Ruy Lopez, Marshall counter-attack	69	42.0%	51.4%
C89	Ruy Lopez, Marshall counter-attack, 11...c6	52	42.3%	50.0%
C89	Ruy Lopez, Marshall, Herman Steiner variation	1	100.0%	50.0%
C89	Ruy Lopez, Marshall, Kevitz variation	1	100.0%	50.0%
C89	Ruy Lopez, Marshall, main line, 12.d2d4	98	42.9%	59.2%
C89	Ruy Lopez, Marshall, main line, 14...Qh3	107	34.6%	54.7%
C90	Ruy Lopez, closed (with ...d6)	589	32.8%	51.2%
C90	Ruy Lopez, closed, Lutikov variation	6	50.0%	58.3%
C90	Ruy Lopez, closed, Pilnik variation	433	36.0%	49.4%
C90	Ruy Lopez, closed, Suetin variation	13	38.5%	50.0%
C91	Ruy Lopez, closed, 9.d4	514	32.9%	55.5%
C91	Ruy Lopez, closed, Bogolyubov variation	1975	38.5%	54.7%
C92	Ruy Lopez, closed, 9.h3	195	44.1%	49.2%
C92	Ruy Lopez, closed, Flohr-Zaitsev system (Lenzerheide variation)	1378	38.6%	55.5%
C92	Ruy Lopez, closed, Keres (9...a5) variation	8	50.0%	50.0%
C92	Ruy Lopez, closed, Kholmov variation	78	29.5%	64.7%
C92	Ruy Lopez, closed, Ragozin-Petrosian (`Keres') variation	189	40.7%	66.4%
C93	Ruy Lopez, closed, Smyslov defence	72	43.1%	56.3%
C94	Ruy Lopez, closed, Breyer defence	18	33.3%	61.1%
C95	Ruy Lopez, closed, Breyer, Borisenko variation	576	38.7%	56.5%
C95	Ruy Lopez, closed, Breyer, Gligoric variation	30	46.7%	60.0%
C95	Ruy Lopez, closed, Breyer, Simagin variation	12	33.3%	75.0%
C96	Ruy Lopez, closed (10...c5)	291	34.7%	58.9%
C96	Ruy Lopez, closed (8...Na5)	10	40.0%	70.0%
C96	Ruy Lopez, closed, Borisenko defence	30	33.3%	56.7%
C96	Ruy Lopez, closed, Keres (...Nd7) defence	121	31.4%	63.6%
C96	Ruy Lopez, closed, Rossolimo defence	2	0.0%	0.0%
C97	Ruy Lopez, closed, Chigorin defence	519	31.6%	63.8%
C98	Ruy Lopez, closed, Chigorin, 12...Nc6	148	31.1%	60.8%
C99	Ruy Lopez, closed, Chigorin, 12...c5d4	867	40.4%	62.7%
D00	Blackmar gambit	5	80.0%	40.0%
D00	Levitsky attack (Queen's bishop attack)	237	33.8%	48.9%
D00	Queen's pawn game	30	46.7%	50.0%
D00	Queen's pawn, Chigorin variation	15	53.3%	60.0%
D00	Queen's pawn, Mason variation	235	38.3%	51.5%
D00	Queen's pawn, Mason variation, Steinitz counter-gambit	14	35.7%	60.7%
D00	Queen's pawn, stonewall attack	4	0.0%	75.0%
D01	Richter-Veresov attack	86	31.4%	40.1%
D01	Richter-Veresov attack, Richter variation	3	66.7%	66.7%
D01	Richter-Veresov attack, Veresov variation	5	40.0%	40.0%
D02	Queen's bishop game	387	32.0%	51.2%
D02	Queen's pawn game	1973	36.5%	53.0%
D02	Queen's pawn game, Chigorin variation	63	49.2%	53.2%
D02	Queen's pawn game, Krause variation	79	48.1%	49.4%
D03	Torre attack (Tartakower variation)	94	38.3%	48.9%
D04	Queen's pawn game	173	35.8%	49.1%
D05	Colle system	13	46.2%	61.5%
D05	Queen's pawn game	127	30.7%	53.1%
D05	Queen's pawn game, Rubinstein (Colle-Zukertort) variation	36	38.9%	55.6%
D05	Queen's pawn game, Zukertort variation	8	25.0%	62.5%
D06	QGD, Grau (Sahovic) defence	20	25.0%	72.5%
D06	QGD, Marshall defence	46	50.0%	59.8%
D06	QGD, symmetrical (Austrian) defence	1	0.0%	0.0%
D07	QGD, Chigorin defence	357	34.7%	57.1%
D07	QGD, Chigorin defence, Janowski variation	14	28.6%	71.4%
D08	QGD, Albin counter-gambit	3	33.3%	50.0%
D09	QGD, Albin counter-gambit, 5.g3	4	25.0%	37.5%
D10	QGD Slav defence	797	34.8%	52.1%
D10	QGD Slav defence, Alekhine variation	9	33.3%	61.1%
D10	QGD Slav defence, exchange variation	357	39.5%	55.0%
D10	QGD Slav, Winawer counter-gambit	40	22.5%	46.3%
D11	QGD Slav, 3.Nf3	406	38.2%	56.0%
D11	QGD Slav, 4.e3	330	34.8%	55.3%
D11	QGD Slav, Breyer variation	22	31.8%	61.4%
D12	QGD Slav, 4.e3 Bf5	679	37.7%	52.9%
D12	QGD Slav, Amsterdam variation	10	50.0%	55.0%
D12	QGD Slav, exchange variation	25	24.0%	44.0%
D13	QGD Slav, exchange variation	237	40.1%	58.0%
D14	QGD Slav, exchange variation, 6.Bf4 Bf5	194	43.3%	48.5%
D14	QGD Slav, exchange, Trifunovic variation	35	40.0%	57.1%
D15	QGD Slav accepted	21	38.1%	38.1%
D15	QGD Slav, 4.Nc3	563	34.5%	52.8%
D15	QGD Slav, 5.e3 (Alekhine variation)	38	36.8%	52.6%
D15	QGD Slav, Schlechter variation	78	46.2%	59.0%
D15	QGD Slav, Suechting variation	12	33.3%	75.0%
D15	QGD Slav, Tolush-Geller gambit	14	28.6%	35.7%
D16	QGD Slav accepted, Alapin variation	25	16.0%	68.0%
D16	QGD Slav, Smyslov variation	27	33.3%	53.7%
D16	QGD Slav, Soultanbeieff variation	8	37.5%	81.3%
D16	QGD Slav, Steiner variation	44	31.8%	72.7%
D17	QGD Slav, Carlsbad variation	181	39.2%	57.2%
D17	QGD Slav, Czech defence	77	39.0%	48.1%
D17	QGD Slav, Krause attack	158	32.3%	56.6%
D17	QGD Slav, Wiesbaden variation	209	41.1%	57.9%
D18	QGD Slav, Dutch variation	44	36.4%	54.5%
D19	QGD Slav, Dutch variation	567	37.4%	57.7%
D19	QGD Slav, Dutch variation, main line	90	40.0%	57.8%
D20	QGA, 3.e4	495	37.0%	60.1%
D20	QGA, Linares variation	19	31.6%	57.9%
D20	Queen's gambit accepted	321	40.5%	56.7%
D21	QGA, 3.Nf3	102	37.3%	58.8%
D21	QGA, Alekhine defense, Borisenko-Furman variation	6	50.0%	41.7%
D21	QGA, Ericson variation	2	0.0%	0.0%
D22	QGA, Alekhine defence	35	42.9%	61.4%
D22	QGA, Alekhine defence, Alatortsev variation	3	33.3%	16.7%
D22	QGA, Haberditz variation	4	75.0%	37.5%
D23	QGA, Mannheim variation	35	31.4%	47.1%
D23	Queen's gambit accepted	4	75.0%	37.5%
D24	QGA, 4.Nc3	58	37.9%	53.4%
D24	QGA, Bogolyubov variation	23	56.5%	58.7%
D25	QGA, 4.e3	19	52.6%	47.4%
D25	QGA, Flohr variation	18	33.3%	61.1%
D25	QGA, Janowsky-Larsen variation	116	38.8%	59.1%
D25	QGA, Smyslov variation	19	63.2%	68.4%
D26	QGA, 4...e6	113	46.0%	52.2%
D26	QGA, classical variation	339	51.0%	51.2%
D26	QGA, classical variation, 6.O-O	28	50.0%	60.7%
D26	QGA, classical, Furman variation	1	0.0%	0.0%
D26	QGA, classical, Steinitz variation	8	50.0%	62.5%
D27	QGA, classical, 6...a6	932	46.5%	54.1%
D27	QGA, classical, Geller variation	31	51.6%	51.6%
D27	QGA, classical, Rubinstein variation	782	44.8%	55.8%
D28	QGA, classical, 7...b5	39	33.3%	62.8%
D28	QGA, classical, 7.Qe2	29	41.4%	58.6%
D29	QGA, classical, 8...Bb7	140	38.6%	44.3%
D29	QGA, classical, Smyslov variation	18	38.9%	47.2%
D30	QGD	122	45.9%	55.7%
D30	QGD Slav	45	55.6%	56.7%
D30	QGD Slav, Semmering variation	4	75.0%	62.5%
D30	QGD, Capablanca variation	2	100.0%	50.0%
D30	QGD, Capablanca-Duras variation	67	46.3%	59.0%
D30	QGD, Hastings variation	38	34.2%	53.9%
D30	QGD, Vienna variation	23	30.4%	54.3%
D30	Queen's gambit declined	1754	39.7%	55.1%
D31	QGD, 3.Nc3	63	39.7%	57.9%
D31	QGD, Alapin variation	2	50.0%	75.0%
D31	QGD, Charousek (Petrosian) variation	228	41.2%	52.2%
D31	QGD, Janowski variation	3	66.7%	33.3%
D31	QGD, semi-Slav	119	33.6%	53.8%
D31	QGD, semi-Slav, Abrahams variation	44	40.9%	45.5%
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	149	40.3%	54.4%
D31	QGD, semi-Slav, Noteboom variation	26	15.4%	38.5%
D32	QGD, Tarrasch defence	107	46.7%	56.1%
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, von Hennig-Schara gambit	7	28.6%	71.4%
D33	QGD, Tarrasch, Folkestone (Swedish) variation	17	52.9%	50.0%
D33	QGD, Tarrasch, Prague variation	22	50.0%	61.4%
D33	QGD, Tarrasch, Schlechter-Rubinstein system	7	28.6%	42.9%
D33	QGD, Tarrasch, Wagner variation	4	25.0%	87.5%
D34	QGD, Tarrasch, Prague variation, 7...Be7	65	41.5%	56.2%
D34	QGD, Tarrasch, Prague variation, 9.Bg5	364	47.8%	56.9%
D34	QGD, Tarrasch, Prague variation, Normal position	202	40.6%	52.5%
D34	QGD, Tarrasch, Reti variation	6	100.0%	50.0%
D35	QGD, 3...Nf6	30	33.3%	50.0%
D35	QGD, Harrwitz attack	6	66.7%	50.0%
D35	QGD, exchange variation	50	48.0%	52.0%
D35	QGD, exchange, Saemisch variation	51	47.1%	41.2%
D35	QGD, exchange, positional line	216	36.1%	56.0%
D35	QGD, exchange, positional line, 5...c6	131	39.7%	57.3%
D36	QGD, exchange, positional line, 6.Qc2	42	40.5%	46.4%
D37	QGD, 4.Nf3	1045	41.5%	53.3%
D37	QGD, classical variation (5.Bf4)	1196	41.3%	56.2%
D38	QGD, Ragozin variation	803	42.8%	51.4%
D39	QGD, Ragozin, Vienna variation	673	48.7%	52.5%
D40	QGD, Semi-Tarrasch defence	193	43.0%	52.6%
D40	QGD, Semi-Tarrasch defence, Pillsbury variation	2	0.0%	50.0%
D41	QGD, Semi-Tarrasch with e3	44	43.2%	55.7%
D41	QGD, Semi-Tarrasch, 5.cd	177	43.5%	59.0%
D41	QGD, Semi-Tarrasch, Kmoch variation	2	100.0%	50.0%
D41	QGD, Semi-Tarrasch, San Sebastian variation	6	16.7%	91.7%
D42	QGD, Semi-Tarrasch, 7.Bd3	104	38.5%	58.7%
D43	QGD semi-Slav	2047	36.7%	54.0%
D44	QGD semi-Slav, 5.Bg5 dc	14	35.7%	46.4%
D44	QGD semi-Slav, Botvinnik system (anti-Meran)	29	34.5%	41.4%
D44	QGD semi-Slav, Ekstrom variation	19	47.4%	39.5%
D44	QGD semi-Slav, anti-Meran gambit	386	33.9%	57.4%
D44	QGD semi-Slav, anti-Meran, Lilienthal variation	93	31.2%	64.0%
D44	QGD semi-Slav, anti-Meran, Szabo variation	15	13.3%	40.0%
D45	QGD semi-Slav, 5...Nd7	159	34.0%	45.9%
D45	QGD semi-Slav, 5.e3	183	41.5%	53.0%
D45	QGD semi-Slav, Rubinstein (anti-Meran) system	11	18.2%	36.4%
D45	QGD semi-Slav, Stoltz variation	5380	40.4%	52.9%
D45	QGD semi-Slav, accelerated Meran (Alekhine variation)	420	41.4%	50.0%
D45	QGD semi-Slav, stonewall defence	2	50.0%	75.0%
D46	QGD semi-Slav, 6.Bd3	15	33.3%	50.0%
D46	QGD semi-Slav, Bogolyubov variation	90	43.3%	52.8%
D46	QGD semi-Slav, Chigorin defence	130	40.0%	56.9%
D46	QGD semi-Slav, Romih variation	115	37.4%	63.0%
D47	QGD semi-Slav, 7.Bc4	18	16.7%	52.8%
D47	QGD semi-Slav, Meran variation	362	44.5%	56.8%
D47	QGD semi-Slav, Meran, Wade variation	4465	35.3%	54.3%
D47	QGD semi-Slav, neo-Meran (Lundin variation)	115	40.0%	58.3%
D48	QGD semi-Slav, Meran	9	0.0%	22.2%
D48	QGD semi-Slav, Meran, 8...a6	468	39.7%	49.8%
D48	QGD semi-Slav, Meran, Pirc variation	6	50.0%	58.3%
D48	QGD semi-Slav, Meran, Reynolds' variation	432	37.5%	53.7%
D48	QGD semi-Slav, Meran, old main line	100	37.0%	55.5%
D49	QGD semi-Slav, Meran, Blumenfeld variation	138	43.5%	47.8%
D49	QGD semi-Slav, Meran, Rabinovich variation	47	34.0%	48.9%
D49	QGD semi-Slav, Meran, Rellstab attack	15	33.3%	56.7%
D49	QGD semi-Slav, Meran, Sozin variation	118	39.0%	47.5%
D49	QGD semi-Slav, Meran, Stahlberg variation	71	42.3%	46.5%
D50	QGD, 4.Bg5	22	50.0%	52.3%
D50	QGD, Been-Koomen variation	3	0.0%	0.0%
D50	QGD, Semi-Tarrasch	4	0.0%	25.0%
D50	QGD, Semi-Tarrasch, Primitive Pillsbury variation	2	0.0%	100.0%
D51	QGD	1	100.0%	50.0%
D51	QGD, 4.Bg5 Nbd7	15	33.3%	56.7%
D51	QGD, 5...c6	21	47.6%	57.1%
D51	QGD, Manhattan variation	3	0.0%	100.0%
D52	QGD	12	50.0%	50.0%
D52	QGD, Cambridge Springs defence	1	100.0%	50.0%
D52	QGD, Cambridge Springs defence, 7.cd	6	50.0%	41.7%
D52	QGD, Cambridge Springs defence, Argentine variation	2	100.0%	50.0%
D52	QGD, Cambridge Springs defence, Bogoljubow variation	155	44.5%	51.3%
D52	QGD, Cambridge Springs defence, Capablanca variation	6	16.7%	58.3%
D52	QGD, Cambridge Springs defence, Rubinstein variation	43	44.2%	50.0%
D52	QGD, Cambridge Springs defence, Yugoslav variation	99	45.5%	55.1%
D53	QGD, 4.Bg5 Be7	65	32.3%	46.9%
D53	QGD, 4.Bg5 Be7, 5.e3 O-O	5	40.0%	60.0%
D53	QGD, Lasker variation	1	0.0%	100.0%
D54	QGD, Anti-neo-orthodox variation	14	35.7%	46.4%
D55	QGD, 6.Nf3	21	38.1%	47.6%
D55	QGD, Neo-orthodox variation	3	0.0%	66.7%
D55	QGD, Neo-orthodox variation, 7.Bh4	47	46.8%	59.6%
D55	QGD, Neo-orthodox variation, 7.Bxf6	84	40.5%	51.2%
D55	QGD, Petrosian variation	240	49.2%	53.3%
D55	QGD, Pillsbury attack	1	100.0%	50.0%
D56	QGD, Lasker defence	107	32.7%	55.6%
D56	QGD, Lasker defence, Teichmann variation	35	34.3%	40.0%
D57	QGD, Lasker defence, Bernstein variation	2	50.0%	75.0%
D57	QGD, Lasker defence, main line	17	70.6%	47.1%
D58	QGD, Tartakower (Makagonov-Bondarevsky) system	3282	44.4%	51.9%
D59	QGD, Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5	89	51.7%	46.1%
D59	QGD, Tartakower variation	53	30.2%	41.5%
D60	QGD, Orthodox defence	26	38.5%	57.7%
D60	QGD, Orthodox defence, Botvinnik variation	22	31.8%	52.3%
D60	QGD, Orthodox defence, Rauzer variation	4	0.0%	100.0%
D61	QGD, Orthodox defence, Rubinstein variation	93	45.2%	49.5%
D62	QGD, Orthodox defence, 7.Qc2 c5, 8.cd (Rubinstein)	64	51.6%	58.6%
D63	QGD, Orthodox defence	22	63.6%	45.5%
D63	QGD, Orthodox defence, 7.Rc1	46	21.7%	56.5%
D63	QGD, Orthodox defence, Capablanca variation	1	100.0%	50.0%
D63	QGD, Orthodox defence, Pillsbury attack	4	25.0%	62.5%
D63	QGD, Orthodox defence, Swiss (Henneberger) variation	50	40.0%	62.0%
D63	QGD, Orthodox defence, Swiss, Karlsbad variation	99	42.4%	51.5%
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	9	11.1%	38.9%
D64	QGD, Orthodox defence, Rubinstein attack, Wolf variation	8	50.0%	50.0%
D65	QGD, Orthodox defence, Rubinstein attack, main line	1	0.0%	100.0%
D66	QGD, Orthodox defence, Bd3 line	101	38.6%	62.9%
D66	QGD, Orthodox defence, Bd3 line, fianchetto variation	3	0.0%	66.7%
D67	QGD, Orthodox defence, Bd3 line	20	50.0%	45.0%
D67	QGD, Orthodox defence, Bd3 line, 11.O-O	29	27.6%	62.1%
D67	QGD, Orthodox defence, Bd3 line, Alekhine variation	36	50.0%	58.3%
D68	QGD, Orthodox defence, classical variation	61	45.9%	55.7%
D68	QGD, Orthodox defence, classical, 13.d1b1 (Maroczy)	3	66.7%	33.3%
D68	QGD, Orthodox defence, classical, 13.d1c2 (Vidmar)	39	53.8%	57.7%
D69	QGD, Orthodox defence, classical, 13.de	21	57.1%	47.6%
D70	Neo-Gruenfeld (Kemeri) defence	9	22.2%	55.6%
D70	Neo-Gruenfeld defence	21	38.1%	47.6%
D71	Neo-Gruenfeld, 5.cd	47	44.7%	58.5%
D72	Neo-Gruenfeld, 5.cd, main line	41	29.3%	56.1%
D73	Neo-Gruenfeld, 5.Nf3	166	52.4%	57.5%
D74	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O	40	37.5%	53.8%
D75	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3	23	34.8%	56.5%
D75	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.dc	5	40.0%	60.0%
D76	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb6	185	37.8%	55.7%
D77	Neo-Gruenfeld, 6.O-O	204	48.5%	54.7%
D78	Neo-Gruenfeld, 6.O-O c6	332	41.3%	54.4%
D79	Neo-Gruenfeld, 6.O-O, main line	121	47.1%	45.9%
D80	Gruenfeld defence	31	35.5%	66.1%
D80	Gruenfeld, Stockholm variation	116	37.9%	57.8%
D81	Gruenfeld, Russian variation	10	50.0%	65.0%
D82	Gruenfeld, 4.Bf4	163	40.5%	57.1%
D83	Gruenfeld, Gruenfeld gambit	6	33.3%	66.7%
D83	Gruenfeld, Gruenfeld gambit, Botvinnik variation	7	71.4%	64.3%
D83	Gruenfeld, Gruenfeld gambit, Capablanca variation	21	42.9%	64.3%
D84	Gruenfeld, Gruenfeld gambit accepted	13	53.8%	57.7%
D85	Gruenfeld, exchange variation	325	42.5%	52.6%
D85	Gruenfeld, modern exchange variation	1401	47.9%	54.2%
D86	Gruenfeld, exchange, Simagin's improved variation	28	35.7%	42.9%
D86	Gruenfeld, exchange, Simagin's lesser variation	3	0.0%	33.3%
D86	Gruenfeld, exchange, classical variation	227	46.7%	55.9%
D87	Gruenfeld, exchange, Seville variation	57	54.4%	60.5%
D87	Gruenfeld, exchange, Spassky variation	146	36.3%	55.8%
D88	Gruenfeld, Spassky variation, main line, 10...cd, 11.cd	52	38.5%	61.5%
D89	Gruenfeld, Spassky variation, main line, 13.Bd3	60	33.3%	50.0%
D89	Gruenfeld, exchange, Sokolsky variation	8	50.0%	25.0%
D90	Gruenfeld, Flohr variation	18	16.7%	58.3%
D90	Gruenfeld, Schlechter variation	8	37.5%	43.8%
D90	Gruenfeld, Three knights variation	80	37.5%	52.5%
D91	Gruenfeld, 5.Bg5	417	36.0%	48.2%
D92	Gruenfeld, 5.Bf4	199	46.2%	55.8%
D93	Gruenfeld with Bf4 e3	94	48.9%	55.3%
D94	Gruenfeld with e3 Bd3	11	45.5%	59.1%
D94	Gruenfeld, 5.e3	153	43.8%	58.5%
D94	Gruenfeld, Flohr defence	10	20.0%	60.0%
D94	Gruenfeld, Makogonov variation	31	51.6%	38.7%
D94	Gruenfeld, Opovcensky variation	41	46.3%	54.9%
D94	Gruenfeld, Smyslov defence	52	57.7%	51.9%
D95	Gruenfeld with e3 & Qb3	4	50.0%	75.0%
D95	Gruenfeld, Botvinnik variation	9	33.3%	50.0%
D96	Gruenfeld, Russian variation	38	36.8%	60.5%
D97	Gruenfeld, Russian variation with e4	5	40.0%	80.0%
D97	Gruenfeld, Russian, Alekhine (Hungarian) variation	611	42.2%	50.7%
D97	Gruenfeld, Russian, Byrne (Simagin) variation	39	30.8%	64.1%
D97	Gruenfeld, Russian, Prins variation	234	40.6%	55.8%
D97	Gruenfeld, Russian, Szabo (Boleslavsky) variation	69	34.8%	53.6%
D98	Gruenfeld, Russian, Keres variation	3	0.0%	100.0%
D98	Gruenfeld, Russian, Smyslov variation	111	40.5%	60.8%
D99	Gruenfeld defence, Smyslov, Yugoslav variation	8	37.5%	43.8%
D99	Gruenfeld defence, Smyslov, main line	99	44.4%	55.6%
E00	Catalan opening	828	37.1%	54.3%
E00	Neo-Indian (Seirawan) attack	112	28.6%	50.0%
E00	Queen's pawn game	167	36.5%	54.2%
E01	Catalan, closed	58	32.8%	54.3%
E02	Catalan, open, 5.Qa4	31	38.7%	64.5%
E03	Catalan, open, 5.Qa4 Nbd7, 6.Qxc4	5	100.0%	50.0%
E04	Catalan, open, 5.Nf3	1009	40.8%	51.9%
E05	Catalan, open, classical line	36	27.8%	52.8%
E06	Catalan, closed, 5.Nf3	859	45.6%	53.3%
E07	Catalan, closed, 6...Nbd7	24	41.7%	45.8%
E07	Catalan, closed, Botvinnik variation	17	41.2%	50.0%
E08	Catalan, closed, 7.Qc2	21	33.3%	54.8%
E08	Catalan, closed, Qc2 & b3	69	37.7%	52.2%
E09	Catalan, closed, main line	65	32.3%	65.4%
E10	Blumenfeld counter-gambit	16	25.0%	56.3%
E10	Blumenfeld counter-gambit accepted	21	23.8%	45.2%
E10	Blumenfeld counter-gambit, Dus-Chotimursky variation	43	34.9%	57.0%
E10	Blumenfeld counter-gambit, Spielmann variation	8	0.0%	50.0%
E10	Doery defence	8	25.0%	50.0%
E10	Dzindzikhashvili defence	9	77.8%	61.1%
E10	Queen's pawn game	1006	42.1%	57.5%
E11	Bogo-Indian defence	386	38.6%	55.6%
E11	Bogo-Indian defence, Gruenfeld variation	402	32.8%	54.0%
E11	Bogo-Indian defence, Monticelli trap	6	33.3%	33.3%
E11	Bogo-Indian defence, Nimzovich variation	475	34.7%	55.9%
E12	Queen's Indian defence	116	31.0%	54.3%
E12	Queen's Indian, 4.Nc3	1532	36.6%	52.4%
E12	Queen's Indian, 4.Nc3, Botvinnik variation	12	16.7%	50.0%
E12	Queen's Indian, Miles variation	124	35.5%	55.6%
E12	Queen's Indian, Petrosian system	2184	37.9%	53.1%
E13	Queen's Indian, 4.Nc3, main line	54	33.3%	53.7%
E14	Queen's Indian, 4.e3	586	37.4%	54.7%
E14	Queen's Indian, Averbakh variation	1	0.0%	100.0%
E15	Queen's Indian, 4.g3	247	33.6%	58.9%
E15	Queen's Indian, 4.g3 Bb7	52	34.6%	65.4%
E15	Queen's Indian, Buerger variation	2	100.0%	50.0%
E15	Queen's Indian, Nimzovich variation (exaggerated fianchetto)	7685	36.3%	56.4%
E15	Queen's Indian, Rubinstein variation	24	37.5%	47.9%
E16	Queen's Indian, Capablanca variation	72	37.5%	54.9%
E16	Queen's Indian, Riumin variation	61	34.4%	54.9%
E16	Queen's Indian, Yates variation	89	29.2%	60.7%
E17	Queen's Indian, 5.Bg2 Be7	12	41.7%	45.8%
E17	Queen's Indian, Euwe variation	20	30.0%	65.0%
E17	Queen's Indian, Opovcensky variation	236	39.8%	55.9%
E17	Queen's Indian, anti-Queen's Indian system	42	45.2%	51.2%
E17	Queen's Indian, old main line, 6.O-O	120	44.2%	55.4%
E18	Queen's Indian, old main line, 7.Nc3	724	42.1%	57.8%
E19	Queen's Indian, old main line, 9.Qxc3	481	39.9%	59.3%
E20	Nimzo-Indian defence	14	28.6%	42.9%
E20	Nimzo-Indian, Kmoch variation	108	34.3%	61.6%
E20	Nimzo-Indian, Romanishin-Kasparov (Steiner) system	144	36.1%	52.8%
E21	Nimzo-Indian, three knights variation	544	38.6%	51.8%
E22	Nimzo-Indian, Spielmann variation	17	64.7%	55.9%
E23	Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc6	10	40.0%	60.0%
E23	Nimzo-Indian, Spielmann, Karlsbad variation	5	60.0%	30.0%
E23	Nimzo-Indian, Spielmann, San Remo variation	2	50.0%	75.0%
E24	Nimzo-Indian, Saemisch variation	26	53.8%	34.6%
E24	Nimzo-Indian, Saemisch, Botvinnik variation	3	0.0%	0.0%
E25	Nimzo-Indian, Saemisch variation	22	68.2%	52.3%
E25	Nimzo-Indian, Saemisch, Keres variation	84	44.0%	51.8%
E25	Nimzo-Indian, Saemisch, Romanovsky variation	5	60.0%	30.0%
E26	Nimzo-Indian, Saemisch variation	16	31.3%	34.4%
E26	Nimzo-Indian, Saemisch, O'Kelly variation	11	27.3%	40.9%
E27	Nimzo-Indian, Saemisch variation	3	33.3%	16.7%
E28	Nimzo-Indian, Saemisch variation	15	20.0%	56.7%
E29	Nimzo-Indian, Saemisch, Capablanca variation	13	30.8%	30.8%
E29	Nimzo-Indian, Saemisch, main line	25	36.0%	62.0%
E30	Nimzo-Indian, Leningrad variation	176	34.7%	50.3%
E30	Nimzo-Indian, Leningrad, ...b5 gambit	28	32.1%	41.1%
E31	Nimzo-Indian, Leningrad, main line	49	30.6%	58.2%
E32	Nimzo-Indian, classical variation	2227	39.6%	53.6%
E32	Nimzo-Indian, classical, Adorjan gambit	51	31.4%	51.0%
E33	Nimzo-Indian, classical, 4...Nc6	17	58.8%	47.1%
E33	Nimzo-Indian, classical, Milner-Barry (Zurich) variation	105	40.0%	55.2%
E34	Nimzo-Indian, classical, Noa variation	216	51.9%	50.5%
E35	Nimzo-Indian, classical, Noa variation, 5.cd ed	106	40.6%	55.2%
E36	Nimzo-Indian, classical, Botvinnik variation	3	0.0%	66.7%
E36	Nimzo-Indian, classical, Noa variation, 5.a3	22	22.7%	52.3%
E37	Nimzo-Indian, classical, Noa variation, main line, 7.Qc2	33	33.3%	77.3%
E38	Nimzo-Indian, classical, 4...c5	132	42.4%	62.1%
E39	Nimzo-Indian, classical, Pirc variation	235	40.4%	56.0%
E40	Nimzo-Indian, 4.e3	63	28.6%	55.6%
E40	Nimzo-Indian, 4.e3, Taimanov variation	10	30.0%	65.0%
E41	Nimzo-Indian, 4.e3 c5	258	36.8%	54.1%
E41	Nimzo-Indian, e3, Huebner variation	181	36.5%	47.0%
E42	Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein)	272	41.2%	50.4%
E43	Nimzo-Indian, Fischer variation	236	39.0%	53.4%
E44	Nimzo-Indian, Fischer variation, 5.Ne2	106	36.8%	55.2%
E45	Nimzo-Indian, 4.e3, Bronstein (Byrne) variation	83	47.0%	58.4%
E46	Nimzo-Indian, 4.e3 O-O	27	25.9%	61.1%
E46	Nimzo-Indian, Reshevsky variation	134	39.6%	47.4%
E46	Nimzo-Indian, Simagin variation	23	26.1%	56.5%
E47	Nimzo-Indian, 4.e3 O-O, 5.Bd3	92	50.0%	59.8%
E48	Nimzo-Indian, 4.e3 O-O, 5.Bd3 d5	122	40.2%	50.4%
E49	Nimzo-Indian, 4.e3, Botvinnik system	68	45.6%	59.6%
E50	Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d5	31	38.7%	54.8%
E51	Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d5	26	53.8%	57.7%
E51	Nimzo-Indian, 4.e3, Ragozin variation	4	75.0%	62.5%
E52	Nimzo-Indian, 4.e3, main line with ...b6	124	41.1%	56.0%
E53	Nimzo-Indian, 4.e3, Gligoric system with 7...Nbd7	13	46.2%	46.2%
E53	Nimzo-Indian, 4.e3, Keres variation	30	40.0%	56.7%
E53	Nimzo-Indian, 4.e3, main line with ...c5	108	38.9%	62.0%
E54	Nimzo-Indian, 4.e3, Gligoric system with 7...dc	301	43.9%	57.1%
E54	Nimzo-Indian, 4.e3, Gligoric system, Smyslov variation	15	53.3%	60.0%
E55	Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation	1150	46.6%	54.3%
E56	Nimzo-Indian, 4.e3, main line with 7...Nc6	69	47.8%	55.8%
E57	Nimzo-Indian, 4.e3, main line with 8...dc and 9...cd	5	60.0%	30.0%
E58	Nimzo-Indian, 4.e3, main line with 8...Bxc3	537	35.8%	53.3%
E59	Nimzo-Indian, 4.e3, main line	608	41.8%	52.8%
E60	King's Indian defence	134	37.3%	55.2%
E60	King's Indian, 3.Nf3	1048	37.2%	57.1%
E60	King's Indian, 3.g3	241	36.5%	53.9%
E60	King's Indian, 3.g3, counterthrust variation	1	0.0%	0.0%
E60	King's Indian, Anti-Gruenfeld	3	33.3%	50.0%
E60	Queen's pawn, Mengarini attack	11	9.1%	86.4%
E61	King's Indian defence, 3.Nc3	234	32.9%	57.5%
E61	King's Indian, Smyslov system	26	38.5%	42.3%
E62	King's Indian, fianchetto variation	25	32.0%	56.0%
E62	King's Indian, fianchetto with ...Nc6	42	40.5%	56.0%
E62	King's Indian, fianchetto, Kavalek (Bronstein) variation	252	33.3%	60.3%
E62	King's Indian, fianchetto, Larsen system	114	39.5%	61.8%
E62	King's Indian, fianchetto, Simagin variation	34	35.3%	61.8%
E62	King's Indian, fianchetto, Uhlmann (Szabo) variation	116	28.4%	61.6%
E62	King's Indian, fianchetto, lesser Simagin (Spassky) variation	62	46.8%	54.0%
E63	King's Indian, fianchetto, Panno variation	1181	35.2%	57.5%
E64	King's Indian, fianchetto, Yugoslav system	39	25.6%	66.7%
E65	King's Indian, fianchetto, Yugoslav, 7.O-O	45	57.8%	51.1%
E66	King's Indian, fianchetto, Yugoslav Panno	92	32.6%	56.5%
E67	King's Indian, fianchetto with ...Nd7	35	37.1%	55.7%
E67	King's Indian, fianchetto, classical variation	167	35.3%	56.6%
E68	King's Indian, fianchetto, classical variation, 8.e4	632	37.0%	59.5%
E69	King's Indian, fianchetto, classical main line	315	31.7%	63.2%
E70	King's Indian, 4.e4	207	26.1%	63.8%
E70	King's Indian, Kramer system	88	23.9%	58.5%
E70	King's Indian, accelerated Averbakh system	31	25.8%	58.1%
E71	King's Indian, Makagonov system (5.h3)	135	25.2%	63.0%
E72	King's Indian with e4 & g3	10	40.0%	60.0%
E72	King's Indian, Pomar system	1	100.0%	50.0%
E73	King's Indian, 5.Be2	7	57.1%	57.1%
E73	King's Indian, Averbakh system	227	27.3%	54.2%
E73	King's Indian, Semi-Averbakh system	6	16.7%	58.3%
E74	King's Indian, Averbakh, 6...c5	33	39.4%	53.0%
E75	King's Indian, Averbakh, main line	26	11.5%	51.9%
E76	King's Indian, Four pawns attack	55	40.0%	58.2%
E76	King's Indian, Four pawns attack, dynamic line	35	31.4%	58.6%
E77	King's Indian, Four pawns attack	40	20.0%	62.5%
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%
E77	King's Indian, Six pawns attack	2	0.0%	0.0%
E79	King's Indian, Four pawns attack, main line	7	14.3%	50.0%
E80	King's Indian, Saemisch variation	60	31.7%	64.2%
E81	King's Indian, Saemisch, 5...O-O	504	33.5%	53.7%
E81	King's Indian, Saemisch, Byrne variation	31	54.8%	53.2%
E82	King's Indian, Saemisch, double fianchetto variation	27	29.6%	55.6%
E83	King's Indian, Saemisch, 6...Nc6	18	27.8%	52.8%
E83	King's Indian, Saemisch, Panno formation	20	40.0%	50.0%
E83	King's Indian, Saemisch, Ruban variation	2	50.0%	25.0%
E84	King's Indian, Saemisch, Panno main line	150	35.3%	51.7%
E85	King's Indian, Saemisch, orthodox variation	2	50.0%	25.0%
E86	King's Indian, Saemisch, orthodox, 7.Nge2 c6	119	28.6%	50.4%
E87	King's Indian, Saemisch, orthodox, 7.d5	72	26.4%	54.9%
E87	King's Indian, Saemisch, orthodox, Bronstein variation	2	50.0%	25.0%
E88	King's Indian, Saemisch, orthodox, 7.d5 c6	121	30.6%	55.0%
E89	King's Indian, Saemisch, orthodox main line	12	41.7%	45.8%
E90	King's Indian, 5.Nf3	205	31.7%	57.3%
E90	King's Indian, Larsen variation	36	41.7%	51.4%
E90	King's Indian, Zinnowitz variation	16	31.3%	59.4%
E91	King's Indian, 6.Be2	206	31.1%	66.0%
E91	King's Indian, Kazakh variation	113	34.5%	56.2%
E92	King's Indian, Andersson variation	90	45.6%	49.4%
E92	King's Indian, Gligoric-Taimanov system	450	29.6%	58.6%
E92	King's Indian, Petrosian system	26	15.4%	46.2%
E92	King's Indian, Petrosian system, Stein variation	270	30.7%	53.1%
E92	King's Indian, classical variation	11	36.4%	54.5%
E93	King's Indian, Petrosian system, main line	33	36.4%	54.5%
E94	King's Indian, orthodox variation	367	36.8%	56.0%
E94	King's Indian, orthodox, 7...Nbd7	426	35.2%	59.2%
E94	King's Indian, orthodox, Donner variation	35	17.1%	60.0%
E95	King's Indian, orthodox, 7...Nbd7, 8.Re1	177	36.2%	55.4%
E96	King's Indian, orthodox, 7...Nbd7, main line	33	33.3%	56.1%
E97	King's Indian, orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)	1895	32.3%	55.0%
E97	King's Indian, orthodox, Aronin-Taimanov, bayonet attack	888	33.6%	59.0%
E98	King's Indian, orthodox, Aronin-Taimanov, 9.Ne1	624	25.2%	61.0%
E99	King's Indian, orthodox, Aronin-Taimanov, Benko attack	18	16.7%	63.9%
E99	King's Indian, orthodox, Aronin-Taimanov, main line	12	16.7%	58.3%