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	10	40.0%	30.0%
A00	Anti-Borg (Desprez) opening	1	0.0%	0.0%
A00	Benko's opening	918	38.8%	51.9%
A00	Benko's opening, reversed Alekhine	15	40.0%	53.3%
A00	Clemenz (Mead's, Basman's or de Klerk's) opening	2	100.0%	50.0%
A00	Dunst (Sleipner, Heinrichsen) opening	39	23.1%	55.1%
A00	Durkin's attack	4	50.0%	25.0%
A00	Grob's attack	3	33.3%	50.0%
A00	Mieses opening	11	63.6%	50.0%
A00	Novosibirsk opening	6	33.3%	66.7%
A00	Polish (Sokolsky) opening	49	34.7%	37.8%
A00	Polish, Outflank variation	13	23.1%	65.4%
A00	Saragossa opening	17	29.4%	55.9%
A00	Van't Kruijs opening	18	44.4%	61.1%
A01	Nimzovich-Larsen attack	33	21.2%	47.0%
A01	Nimzovich-Larsen attack, Dutch variation	8	0.0%	75.0%
A01	Nimzovich-Larsen attack, English variation	27	44.4%	55.6%
A01	Nimzovich-Larsen attack, Indian variation	58	24.1%	50.0%
A01	Nimzovich-Larsen attack, classical variation	85	42.4%	51.8%
A01	Nimzovich-Larsen attack, modern variation	145	35.2%	52.1%
A01	Nimzovich-Larsen attack, symmetrical variation	9	11.1%	61.1%
A02	Bird's opening	49	28.6%	57.1%
A02	Bird, From gambit, Lasker variation	1	0.0%	100.0%
A03	Bird's opening	17	52.9%	38.2%
A03	Bird's opening, Lasker variation	1	100.0%	50.0%
A04	Reti opening	2934	36.9%	54.1%
A04	Reti v Dutch	309	33.0%	57.0%
A04	Reti, Lisitsin gambit deferred	2	50.0%	25.0%
A04	Reti, Pirc-Lisitsin gambit	58	34.5%	56.9%
A04	Reti, Wade defence	2	0.0%	50.0%
A05	Reti opening	1218	37.7%	53.4%
A05	Reti, King's Indian attack	370	42.4%	54.7%
A05	Reti, King's Indian attack, Reti-Smyslov variation	26	42.3%	55.8%
A05	Reti, King's Indian attack, Spassky's variation	110	42.7%	49.5%
A06	Reti opening	353	36.3%	52.7%
A06	Reti, Nimzovich-Larsen attack	277	35.4%	49.1%
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	183	32.8%	47.0%
A07	Reti, King's Indian attack (Barcza system)	1918	41.1%	53.5%
A07	Reti, King's Indian attack (with ...c5)	90	40.0%	56.7%
A07	Reti, King's Indian attack, Keres variation	209	36.4%	53.1%
A07	Reti, King's Indian attack, Pachman system	108	48.1%	54.6%
A07	Reti, King's Indian attack, Yugoslav variation	669	38.0%	52.6%
A08	Reti, King's Indian attack	321	42.7%	50.3%
A08	Reti, King's Indian attack, French variation	174	34.5%	43.7%
A09	Reti accepted	69	43.5%	50.7%
A09	Reti accepted, Keres variation	16	25.0%	68.8%
A09	Reti opening	86	39.5%	53.5%
A09	Reti, advance variation	150	40.0%	48.0%
A10	English opening	791	42.1%	54.4%
A10	English, Adorjan defence	45	44.4%	53.3%
A10	English, Anglo-Dutch defense	102	33.3%	53.9%
A10	English, Jaenisch gambit	2	0.0%	100.0%
A11	English, Caro-Kann defensive system	248	42.3%	57.1%
A12	English, Bled variation	8	37.5%	68.8%
A12	English, Capablanca's variation	34	29.4%	50.0%
A12	English, Caro-Kann defensive system	28	42.9%	50.0%
A12	English, Caro-Kann defensive system, Bogolyubov variation	15	46.7%	70.0%
A12	English, London defensive system	29	41.4%	41.4%
A12	English, New York (London) defensive system	5	60.0%	50.0%
A12	English, Torre defensive system	16	56.3%	46.9%
A13	English opening	737	33.4%	50.5%
A13	English opening, Agincourt variation	367	40.1%	51.9%
A13	English, Kurajica defence	13	30.8%	46.2%
A13	English, Neo-Catalan	141	46.8%	55.3%
A13	English, Neo-Catalan accepted	289	43.6%	55.0%
A13	English, Romanishin gambit	53	47.2%	63.2%
A13	English, Wimpey system	39	43.6%	50.0%
A14	English, Neo-Catalan declined	227	35.2%	51.1%
A14	English, Symmetrical, Keres defence	308	44.2%	56.8%
A15	English opening	2617	39.0%	53.5%
A15	English, 1...Nf6 (Anglo-Indian defense)	331	36.3%	58.0%
A16	English opening	358	29.3%	52.7%
A16	English, Anglo-Gruenfeld defense	56	35.7%	50.0%
A16	English, Anglo-Gruenfeld, Czech defense	51	35.3%	70.6%
A16	English, Anglo-Gruenfeld, Smyslov defense	26	34.6%	67.3%
A17	English opening	94	43.6%	53.7%
A17	English, Nimzo-English opening	555	40.0%	56.2%
A17	English, Queens Indian formation	74	36.5%	57.4%
A17	English, Queens Indian, Romanishin variation	21	42.9%	59.5%
A18	English, Mikenas-Carls variation	6	66.7%	66.7%
A18	English, Mikenas-Carls, Flohr variation	48	33.3%	58.3%
A18	English, Mikenas-Carls, Kevitz variation	2	100.0%	50.0%
A19	English, Mikenas-Carls, Sicilian variation	54	40.7%	59.3%
A20	English opening	1762	36.6%	54.7%
A20	English, Nimzovich variation	31	22.6%	62.9%
A20	English, Nimzovich, Flohr variation	100	45.0%	46.5%
A21	English opening	527	31.3%	57.8%
A21	English, Keres variation	6	33.3%	50.0%
A21	English, Kramnik-Shirov counterattack	196	39.3%	49.7%
A21	English, Smyslov defence	22	27.3%	50.0%
A21	English, Troeger defence	57	29.8%	48.2%
A22	English opening	190	28.9%	50.8%
A22	English, Bellon gambit	6	50.0%	58.3%
A22	English, Bremen, Smyslov system	398	38.7%	47.2%
A22	English, Bremen, reverse dragon	198	39.4%	49.5%
A22	English, Carls' Bremen system	74	35.1%	62.2%
A23	English, Bremen system, Keres variation	68	32.4%	60.3%
A24	English, Bremen system with ...g6	18	50.0%	58.3%
A25	English, Sicilian reversed	180	36.7%	48.9%
A25	English, closed system	320	36.3%	54.7%
A25	English, closed system (without ...d6)	68	27.9%	53.7%
A25	English, closed, 5.Rb1	148	44.6%	53.4%
A25	English, closed, 5.Rb1 Taimanov variation	2	0.0%	50.0%
A25	English, closed, Hort variation	4	25.0%	37.5%
A25	English, closed, Taimanov variation	11	18.2%	63.6%
A26	English, Botvinnik system	112	44.6%	49.1%
A26	English, closed system	106	34.9%	59.9%
A27	English, three knights system	94	26.6%	61.2%
A28	English, Bradley Beach variation	28	25.0%	41.1%
A28	English, Nenarokov variation	25	56.0%	68.0%
A28	English, four knights system	127	37.8%	46.5%
A28	English, four knights, 4.e3	406	36.5%	52.5%
A28	English, four knights, Capablanca variation	125	37.6%	53.2%
A28	English, four knights, Marini variation	179	36.3%	48.3%
A28	English, four knights, Nimzovich variation	59	30.5%	45.8%
A28	English, four knights, Romanishin variation	164	45.1%	56.1%
A28	English, four knights, Stean variation	47	42.6%	59.6%
A29	English, four knights, kingside fianchetto	2482	37.8%	52.0%
A30	English, symmetrical variation	1464	35.5%	55.0%
A30	English, symmetrical, hedgehog system	1224	42.2%	55.5%
A30	English, symmetrical, hedgehog, flexible formation	133	45.9%	54.5%
A31	English, symmetrical, Benoni formation	269	40.5%	57.1%
A32	English, symmetrical variation	95	37.9%	56.8%
A33	English, symmetrical variation	502	48.8%	56.1%
A33	English, symmetrical, Geller variation	275	34.2%	57.5%
A34	English, symmetrical variation	439	33.7%	53.3%
A34	English, symmetrical, Rubinstein system	59	28.8%	53.4%
A34	English, symmetrical, three knights system	375	37.9%	56.5%
A35	English, symmetrical variation	69	26.1%	56.5%
A35	English, symmetrical, four knights system	742	42.5%	51.3%
A36	English, symmetrical variation	35	25.7%	67.1%
A36	English, symmetrical, Botvinnik system	18	33.3%	61.1%
A36	English, symmetrical, Botvinnik system reversed	24	29.2%	56.3%
A36	English, ultra-symmetrical variation	482	36.9%	53.7%
A37	English, symmetrical variation	202	36.6%	51.5%
A37	English, symmetrical, Botvinnik system reversed	204	31.4%	50.5%
A38	English, symmetrical variation	286	44.1%	54.5%
A38	English, symmetrical, main line with b3	1	100.0%	50.0%
A38	English, symmetrical, main line with d3	46	43.5%	47.8%
A39	English, symmetrical, main line with d4	262	41.2%	58.4%
A40	Beefeater defence	10	30.0%	85.0%
A40	Modern defence	237	35.4%	62.9%
A40	Polish defence	21	47.6%	47.6%
A40	Queen's pawn	1054	37.4%	55.7%
A40	Queen's pawn, Charlick (Englund) gambit	1	100.0%	50.0%
A40	Queen's pawn, English defence	30	30.0%	71.7%
A40	Queen's pawn, Franco-Indian (Keres) defence	230	33.9%	52.6%
A40	Queen's pawn, Keres defence	379	39.8%	58.4%
A40	Queen's pawn, Lundin (Kevitz-Mikenas) defence	46	28.3%	64.1%
A41	Modern defence	14	28.6%	50.0%
A41	Old Indian defence	175	25.1%	57.7%
A41	Old Indian, Tartakower (Wade) variation	350	32.0%	60.3%
A41	Queen's Pawn	538	36.4%	53.5%
A41	Robatsch defence, Rossolimo variation	44	38.6%	44.3%
A42	Modern defence, Averbakh system	91	34.1%	65.4%
A42	Modern defence, Averbakh system, Kotov variation	22	31.8%	70.5%
A42	Modern defence, Averbakh system, Randspringer variation	2	0.0%	100.0%
A42	Pterodactyl defence	311	35.4%	65.0%
A43	Hawk (Habichd) defence	1	0.0%	0.0%
A43	Old Benoni defence	435	31.7%	58.4%
A43	Old Benoni, Franco-Benoni defence	14	42.9%	57.1%
A43	Old Benoni, Mujannah formation	4	25.0%	87.5%
A43	Old Benoni, Schmid's system	6	0.0%	16.7%
A44	Old Benoni defence	7	71.4%	64.3%
A44	Semi-Benoni (`blockade variation')	29	27.6%	62.1%
A45	Blackmar-Diemer gambit	34	26.5%	54.4%
A45	Canard opening	11	36.4%	27.3%
A45	Paleface attack	2	0.0%	50.0%
A45	Queen's pawn game	587	39.2%	52.8%
A45	Trompovsky attack (Ruth, Opovcensky opening)	809	31.6%	52.7%
A46	Queen's pawn game	902	35.6%	55.3%
A46	Queen's pawn, Torre attack	434	35.9%	48.8%
A46	Queen's pawn, Torre attack, Wagner gambit	1	0.0%	100.0%
A46	Queen's pawn, Yusupov-Rubinstein system	163	35.0%	56.1%
A47	Queen's Indian defence	168	39.3%	57.1%
A47	Queen's Indian, Marienbad system	40	32.5%	51.3%
A47	Queen's Indian, Marienbad system, Berg variation	6	16.7%	58.3%
A48	King's Indian, East Indian defence	332	34.3%	50.9%
A48	King's Indian, London system	174	40.2%	48.9%
A48	King's Indian, Torre attack	433	37.9%	51.0%
A49	King's Indian, fianchetto without c4	394	37.8%	58.2%
A50	Kevitz-Trajkovich defence	67	40.3%	45.5%
A50	Queen's Indian accelerated	25	32.0%	56.0%
A50	Queen's pawn game	156	36.5%	58.0%
A51	Budapest defence declined	2	0.0%	50.0%
A51	Budapest, Fajarowicz variation	8	0.0%	62.5%
A52	Budapest defence	13	46.2%	61.5%
A52	Budapest, Adler variation	53	43.4%	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	144	41.7%	63.2%
A53	Old Indian defence	318	37.1%	56.6%
A53	Old Indian, Janowski variation	23	26.1%	60.9%
A54	Old Indian, Ukrainian variation	20	55.0%	67.5%
A54	Old Indian, Ukrainian variation, 4.Nf3	68	44.1%	61.8%
A55	Old Indian, main line	166	43.4%	60.2%
A56	Benoni defence	235	32.8%	59.4%
A56	Benoni defence, Hromodka system	217	23.0%	65.0%
A56	Czech Benoni defence	63	19.0%	66.7%
A56	Czech Benoni, King's Indian system	14	7.1%	53.6%
A56	Vulture defence	1	100.0%	50.0%
A57	Benko gambit	191	33.5%	59.7%
A57	Benko gambit half accepted	259	36.3%	51.7%
A57	Benko gambit, Zaitsev system	27	29.6%	44.4%
A58	Benko gambit accepted	187	38.5%	55.6%
A58	Benko gambit, Nd2 variation	2	50.0%	75.0%
A58	Benko gambit, fianchetto variation	52	40.4%	60.6%
A59	Benko gambit	17	47.1%	41.2%
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	68	44.1%	61.8%
A60	Benoni defence	26	23.1%	65.4%
A61	Benoni defence	172	22.7%	67.7%
A61	Benoni, Nimzovich (knight's tour) variation	153	22.9%	63.1%
A61	Benoni, Uhlmann variation	173	22.5%	37.9%
A61	Benoni, fianchetto variation	9	11.1%	94.4%
A62	Benoni, fianchetto variation	146	32.9%	56.2%
A63	Benoni, fianchetto, 9...Nbd7	22	36.4%	63.6%
A64	Benoni, fianchetto, 11...Re8	47	36.2%	43.6%
A65	Benoni, 6.e4	35	22.9%	48.6%
A67	Benoni, Taimanov variation	27	14.8%	70.4%
A69	Benoni, four pawns attack, main line	16	56.3%	59.4%
A70	Benoni, classical with e4 and Nf3	215	32.6%	56.7%
A70	Benoni, classical without 9.O-O	3	0.0%	33.3%
A71	Benoni, classical, 8.Bg5	48	20.8%	52.1%
A72	Benoni, classical without 9.O-O	23	17.4%	78.3%
A73	Benoni, classical, 9.O-O	26	19.2%	63.5%
A74	Benoni, classical, 9...a6, 10.a4	3	0.0%	66.7%
A75	Benoni, classical with ...a6 and 10...Bg4	27	25.9%	68.5%
A76	Benoni, classical, 9...Re8	35	31.4%	58.6%
A77	Benoni, classical, 9...Re8, 10.Nd2	61	27.9%	66.4%
A78	Benoni, classical with ...Re8 and ...Na6	17	35.3%	52.9%
A79	Benoni, classical, 11.f3	29	31.0%	56.9%
A80	Dutch	490	34.9%	55.4%
A80	Dutch, 2.Bg5 variation	103	37.9%	54.9%
A80	Dutch, Manhattan (Alapin, Ulvestad) variation	3	66.7%	66.7%
A81	Dutch defence	904	36.2%	56.6%
A81	Dutch defence, Blackburne variation	5	20.0%	30.0%
A81	Dutch, Leningrad, Karlsbad variation	2	100.0%	50.0%
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	4	25.0%	37.5%
A83	Dutch, Staunton gambit, Lasker variation	1	0.0%	100.0%
A83	Dutch, Staunton gambit, Staunton's line	15	46.7%	56.7%
A84	Dutch defence	194	40.7%	57.0%
A84	Dutch defence, Rubinstein variation	87	40.2%	54.6%
A84	Dutch, Staunton gambit deferred	8	75.0%	37.5%
A85	Dutch with c4 & Nc3	74	35.1%	55.4%
A86	Dutch with c4 & g3	17	41.2%	61.8%
A86	Dutch, Leningrad variation	25	56.0%	60.0%
A87	Dutch, Leningrad, main variation	137	43.1%	54.4%
A88	Dutch, Leningrad, main variation with c6	290	34.5%	59.7%
A89	Dutch, Leningrad, main variation with Nc6	185	40.0%	65.9%
A90	Dutch defence	279	39.4%	58.8%
A90	Dutch defence, Dutch-Indian (Nimzo-Dutch) variation	39	33.3%	62.8%
A90	Dutch-Indian, Alekhine variation	17	29.4%	61.8%
A91	Dutch defence	16	37.5%	62.5%
A92	Dutch defence	10	60.0%	70.0%
A92	Dutch defence, Alekhine variation	18	22.2%	66.7%
A92	Dutch, stonewall variation	39	46.2%	66.7%
A93	Dutch, stonewall, Botwinnik variation	37	24.3%	55.4%
A94	Dutch, stonewall with Ba3	24	50.0%	66.7%
A95	Dutch, stonewall with Nc3	37	24.3%	60.8%
A95	Dutch, stonewall: Chekhover variation	1	100.0%	50.0%
A96	Dutch, classical variation	65	29.2%	62.3%
A97	Dutch, Ilyin-Genevsky variation	5	20.0%	30.0%
A97	Dutch, Ilyin-Genevsky, Winter variation	39	41.0%	66.7%
A98	Dutch, Ilyin-Genevsky variation with Qc2	14	35.7%	53.6%
A99	Dutch, Ilyin-Genevsky variation with b3	52	36.5%	66.3%
B00	KP, Colorado counter	2	0.0%	50.0%
B00	KP, Nimzovich defence	88	36.4%	60.2%
B00	KP, Nimzovich defence, Bogolyubov variation	8	12.5%	68.8%
B00	King's pawn opening	338	37.6%	57.2%
B00	Lemming defence	2	50.0%	25.0%
B00	Owen defence	61	37.7%	59.8%
B00	Reversed Grob (Borg/Basman defence/macho Grob)	5	20.0%	90.0%
B00	St. George (Baker) defence	2	0.0%	0.0%
B01	Scandinavian (centre counter) defence	237	37.1%	58.2%
B01	Scandinavian defence	101	39.6%	54.5%
B01	Scandinavian defence, Gruenfeld variation	5	20.0%	70.0%
B01	Scandinavian defence, Lasker variation	20	35.0%	57.5%
B01	Scandinavian gambit	35	42.9%	61.4%
B01	Scandinavian, Anderssen counter-attack orthodox attack	1	0.0%	100.0%
B01	Scandinavian, Anderssen counter-attack, Collijn variation	1	0.0%	100.0%
B01	Scandinavian, Icelandic gambit	16	43.8%	53.1%
B01	Scandinavian, Marshall variation	134	41.0%	64.6%
B01	Scandinavian, Pytel-Wade variation	81	43.2%	58.6%
B02	Alekhine's defence	31	35.5%	53.2%
B02	Alekhine's defence, Brooklyn defence	7	14.3%	35.7%
B02	Alekhine's defence, Kmoch variation	2	50.0%	75.0%
B02	Alekhine's defence, Maroczy variation	23	39.1%	58.7%
B02	Alekhine's defence, Saemisch attack	8	62.5%	43.8%
B02	Alekhine's defence, Scandinavian variation	34	29.4%	55.9%
B02	Alekhine's defence, Spielmann variation	4	50.0%	25.0%
B02	Alekhine's defence, Two pawns' (Lasker's) attack	31	58.1%	61.3%
B03	Alekhine's defence	6	33.3%	66.7%
B03	Alekhine's defence, Balogh variation	4	0.0%	75.0%
B03	Alekhine's defence, O'Sullivan gambit	4	50.0%	50.0%
B03	Alekhine's defence, exchange variation	96	33.3%	60.4%
B03	Alekhine's defence, exchange, Karpov variation	2	50.0%	75.0%
B03	Alekhine's defence, four pawns attack	11	27.3%	59.1%
B03	Alekhine's defence, four pawns attack, 7.Be3	23	52.2%	73.9%
B03	Alekhine's defence, four pawns attack, Trifunovic variation	5	20.0%	90.0%
B03	Alekhine's defence, four pawns attack, fianchetto variation	4	0.0%	50.0%
B04	Alekhine's defence, modern variation	52	28.8%	64.4%
B04	Alekhine's defence, modern, Keres variation	21	47.6%	61.9%
B04	Alekhine's defence, modern, Larsen variation	73	35.6%	60.3%
B04	Alekhine's defence, modern, Schmid variation	21	42.9%	54.8%
B04	Alekhine's defence, modern, fianchetto variation	61	23.0%	73.8%
B05	Alekhine's defence, modern variation, 4...Bg4	177	30.5%	64.4%
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	1517	35.5%	57.0%
B06	Robatsch defence	251	33.5%	59.0%
B06	Robatsch defence, Gurgenidze variation	21	38.1%	57.1%
B06	Robatsch defence, Pseudo-Austrian attack	130	26.9%	62.7%
B06	Robatsch defence, Two knights variation	152	37.5%	61.5%
B06	Robatsch defence, Two knights, Suttles variation	780	39.4%	57.9%
B06	Robatsch defence, three pawns attack	11	45.5%	59.1%
B07	Pirc defence	279	35.8%	57.7%
B07	Pirc, 150 attack	90	40.0%	58.9%
B07	Pirc, Byrne variation	106	32.1%	61.3%
B07	Pirc, Holmov system	28	71.4%	57.1%
B07	Pirc, Sveshnikov system	77	27.3%	48.7%
B07	Pirc, Ufimtsev-Pytel variation	123	30.9%	59.3%
B07	Pirc, bayonet (Mariotti) attack	11	54.5%	54.5%
B07	Robatsch defence, Geller's system	297	35.7%	59.9%
B08	Pirc, classical (two knights) system	161	33.5%	61.5%
B08	Pirc, classical system, 5.Be2	768	37.5%	57.8%
B08	Pirc, classical, h3 system	123	35.8%	53.7%
B09	Pirc, Austrian attack	61	39.3%	60.7%
B09	Pirc, Austrian attack, 6.Bd3	388	37.1%	61.6%
B09	Pirc, Austrian attack, 6.Be3	77	32.5%	57.8%
B09	Pirc, Austrian attack, 6.e5	30	43.3%	58.3%
B09	Pirc, Austrian attack, Ljubojevic variation	5	20.0%	70.0%
B09	Pirc, Austrian attack, dragon formation	173	42.8%	59.0%
B10	Caro-Kann defence	558	31.2%	57.5%
B10	Caro-Kann, Goldman (Spielmann) variation	6	16.7%	25.0%
B10	Caro-Kann, Two knights variation	98	37.8%	61.7%
B10	Caro-Kann, anti-Caro-Kann defence	240	30.4%	61.0%
B10	Caro-Kann, anti-anti-Caro-Kann defence	312	42.6%	51.4%
B10	Caro-Kann, closed (Breyer) variation	148	33.8%	50.7%
B11	Caro-Kann, Two knights, 3...Bg4	191	33.0%	52.1%
B12	Caro-Kann defence	100	38.0%	56.0%
B12	Caro-Kann, 3.Nd2	84	38.1%	50.0%
B12	Caro-Kann, Edinburgh variation	8	37.5%	43.8%
B12	Caro-Kann, Tartakower (fantasy) variation	168	38.7%	55.1%
B12	Caro-Kann, advance variation	1743	33.4%	56.0%
B12	Caro-Kann, advance, Short variation	9	44.4%	44.4%
B12	de Bruycker defence	3	0.0%	66.7%
B13	Caro-Kann, Panov-Botvinnik attack	199	51.3%	51.8%
B13	Caro-Kann, Panov-Botvinnik, Czerniak variation	11	36.4%	45.5%
B13	Caro-Kann, Panov-Botvinnik, Gunderam attack	4	0.0%	50.0%
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	23	39.1%	58.7%
B13	Caro-Kann, exchange variation	172	42.4%	49.7%
B13	Caro-Kann, exchange, Rubinstein variation	44	40.9%	45.5%
B14	Caro-Kann, Panov-Botvinnik attack, 5...e6	712	43.3%	52.9%
B14	Caro-Kann, Panov-Botvinnik attack, 5...g6	87	42.5%	52.3%
B15	Caro-Kann defence	71	26.8%	57.0%
B15	Caro-Kann, Alekhine gambit	3	33.3%	83.3%
B15	Caro-Kann, Forgacs variation	72	31.9%	56.3%
B15	Caro-Kann, Gurgenidze counter-attack	5	40.0%	60.0%
B15	Caro-Kann, Gurgenidze system	130	35.4%	57.7%
B15	Caro-Kann, Rasa-Studier gambit	5	40.0%	40.0%
B15	Caro-Kann, Tartakower (Nimzovich) variation	39	28.2%	60.3%
B16	Caro-Kann, Bronstein-Larsen variation	70	28.6%	55.7%
B17	Caro-Kann, Steinitz variation	1282	39.5%	53.1%
B18	Caro-Kann, classical variation	276	39.5%	53.4%
B18	Caro-Kann, classical, 6.h4	161	34.2%	53.7%
B18	Caro-Kann, classical, Flohr variation	16	50.0%	50.0%
B18	Caro-Kann, classical, Maroczy attack	6	33.3%	33.3%
B19	Caro-Kann, classical, 7...Nd7	30	46.7%	50.0%
B19	Caro-Kann, classical, Spassky variation	1324	37.5%	55.4%
B20	Sicilian defence	482	34.6%	51.6%
B20	Sicilian, Keres variation (2.Ne2)	87	37.9%	54.6%
B20	Sicilian, Steinitz variation	175	44.0%	47.1%
B20	Sicilian, wing gambit	4	75.0%	62.5%
B20	Sicilian, wing gambit, Carlsbad variation	4	25.0%	37.5%
B21	Sicilian, Grand Prix attack	267	35.6%	50.4%
B21	Sicilian, Smith-Morra gambit	28	42.9%	50.0%
B22	Sicilian, 2.c3, Heidenfeld variation	4	25.0%	62.5%
B22	Sicilian, Alapin's variation (2.c3)	1816	39.2%	55.1%
B23	Sicilian, Grand Prix attack	123	31.7%	50.0%
B23	Sicilian, Grand Prix attack, Schofman variation	10	40.0%	70.0%
B23	Sicilian, chameleon variation	95	36.8%	59.5%
B23	Sicilian, closed	740	33.4%	51.7%
B23	Sicilian, closed, 2...Nc6	234	41.5%	56.6%
B23	Sicilian, closed, Korchnoi variation	29	37.9%	43.1%
B24	Sicilian, closed	106	31.1%	50.5%
B24	Sicilian, closed, Smyslov variation	2	0.0%	100.0%
B25	Sicilian, closed	64	35.9%	53.9%
B25	Sicilian, closed, 6.Ne2 e5 (Botvinnik)	16	31.3%	46.9%
B25	Sicilian, closed, 6.f4	93	41.9%	51.1%
B25	Sicilian, closed, 6.f4 e5 (Botvinnik)	22	50.0%	47.7%
B26	Sicilian, closed, 6.Be3	108	34.3%	48.6%
B27	Sicilian defence	2	50.0%	75.0%
B27	Sicilian, Hungarian variation	3024	40.7%	58.7%
B27	Sicilian, Katalimov variation	8	50.0%	62.5%
B27	Sicilian, Quinteros variation	8	25.0%	87.5%
B28	Sicilian, O'Kelly variation	60	43.3%	53.3%
B29	Sicilian, Nimzovich-Rubinstein variation	40	42.5%	56.3%
B29	Sicilian, Nimzovich-Rubinstein; Rubinstein counter-gambit	13	23.1%	42.3%
B30	Sicilian defence	652	38.8%	52.5%
B30	Sicilian, Nimzovich-Rossolimo attack (without ...d6)	1106	35.2%	58.1%
B31	Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6)	723	38.3%	55.1%
B31	Sicilian, Nimzovich-Rossolimo attack, Gurgenidze variation	3	100.0%	50.0%
B32	Sicilian defence	225	32.4%	57.1%
B32	Sicilian, Flohr variation	79	36.7%	62.7%
B32	Sicilian, Labourdonnais-Loewenthal (Kalashnikov) variation	520	38.1%	59.8%
B32	Sicilian, Labourdonnais-Loewenthal variation	49	49.0%	55.1%
B32	Sicilian, Nimzovich variation	8	25.0%	37.5%
B33	Sicilian defence	200	34.0%	51.5%
B33	Sicilian, Pelikan (Lasker/Sveshnikov) variation	188	26.6%	53.2%
B33	Sicilian, Pelikan, Bird variation	92	43.5%	55.4%
B33	Sicilian, Pelikan, Chelyabinsk variation	1111	32.5%	58.1%
B33	Sicilian, Sveshnikov variation	660	35.5%	51.7%
B34	Sicilian, accelerated fianchetto, exchange variation	1	0.0%	100.0%
B34	Sicilian, accelerated fianchetto, modern variation	172	34.9%	54.1%
B35	Sicilian, accelerated fianchetto, modern variation with Bc4	903	42.0%	52.8%
B36	Sicilian, accelerated fianchetto, Gurgenidze variation	133	36.1%	60.9%
B36	Sicilian, accelerated fianchetto, Maroczy bind	445	44.7%	58.1%
B37	Sicilian, accelerated fianchetto, Maroczy bind, 5...Bg7	75	52.0%	60.7%
B37	Sicilian, accelerated fianchetto, Simagin variation	2	100.0%	50.0%
B38	Sicilian, accelerated fianchetto, Maroczy bind, 6.Be3	821	42.5%	58.2%
B39	Sicilian, accelerated fianchetto, Breyer variation	459	39.7%	56.4%
B40	Sicilian defence	1541	36.1%	54.8%
B40	Sicilian, Anderssen variation	239	34.3%	57.7%
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	12	16.7%	75.0%
B41	Sicilian, Kan variation	71	38.0%	58.5%
B41	Sicilian, Kan, Maroczy bind (Reti variation)	103	31.1%	53.4%
B41	Sicilian, Kan, Maroczy bind - Bronstein variation	15	26.7%	26.7%
B42	Sicilian, Kan, 5.Bd3	662	36.1%	56.7%
B42	Sicilian, Kan, Gipslis variation	46	34.8%	56.5%
B42	Sicilian, Kan, Polugaievsky variation	376	36.7%	54.8%
B42	Sicilian, Kan, Swiss cheese variation	57	33.3%	62.3%
B43	Sicilian, Kan, 5.Nc3	676	34.2%	57.0%
B44	Sicilian defence	155	39.4%	49.4%
B44	Sicilian, Szen (`anti-Taimanov') variation	288	41.3%	51.2%
B44	Sicilian, Szen variation, Dely-Kasparov gambit	4	50.0%	50.0%
B44	Sicilian, Szen, hedgehog variation	156	34.6%	52.6%
B45	Sicilian, Taimanov variation	952	38.0%	57.1%
B45	Sicilian, Taimanov, American attack	6	33.3%	33.3%
B46	Sicilian, Taimanov variation	1484	38.6%	54.4%
B47	Sicilian, Taimanov (Bastrikov) variation	2108	38.3%	54.3%
B48	Sicilian, Taimanov variation	1107	35.0%	53.5%
B49	Sicilian, Taimanov variation	308	40.6%	56.3%
B50	Sicilian	737	36.4%	55.5%
B51	Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack	388	43.0%	54.3%
B52	Sicilian, Canal-Sokolsky attack, 3...Bd7	337	40.4%	50.1%
B52	Sicilian, Canal-Sokolsky attack, Bronstein gambit	40	32.5%	61.3%
B52	Sicilian, Canal-Sokolsky attack, Sokolsky variation	199	45.7%	56.0%
B53	Sicilian, Chekhover variation	168	37.5%	53.3%
B53	Sicilian, Chekhover, Zaitsev variation	11	9.1%	68.2%
B54	Sicilian	305	35.4%	54.8%
B54	Sicilian, Prins (Moscow) variation	112	36.6%	54.9%
B55	Sicilian, Prins variation, Venice attack	9	44.4%	66.7%
B56	Sicilian	514	34.6%	54.1%
B56	Sicilian, Venice attack	30	50.0%	48.3%
B57	Sicilian, Magnus Smith trap	5	40.0%	40.0%
B57	Sicilian, Sozin, Benko variation	574	39.2%	49.7%
B57	Sicilian, Sozin, not Scheveningen	68	39.7%	53.7%
B58	Sicilian, Boleslavsky variation	238	36.6%	48.9%
B58	Sicilian, Boleslavsky, Louma variation	1	0.0%	100.0%
B58	Sicilian, classical	100	43.0%	44.5%
B59	Sicilian, Boleslavsky variation, 7.Nb3	32	25.0%	50.0%
B60	Sicilian, Richter-Rauzer	84	28.6%	60.7%
B60	Sicilian, Richter-Rauzer, Bondarevsky variation	6	33.3%	33.3%
B60	Sicilian, Richter-Rauzer, Larsen variation	40	30.0%	60.0%
B61	Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2	138	31.9%	57.2%
B62	Sicilian, Richter-Rauzer, 6...e6	25	32.0%	56.0%
B62	Sicilian, Richter-Rauzer, Keres variation	43	23.3%	51.2%
B62	Sicilian, Richter-Rauzer, Margate (Alekhine) variation	25	32.0%	52.0%
B62	Sicilian, Richter-Rauzer, Podvebrady variation	13	61.5%	38.5%
B63	Sicilian, Richter-Rauzer, Rauzer attack	47	25.5%	57.4%
B63	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7	434	30.4%	54.6%
B64	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9.f4	189	38.1%	50.8%
B64	Sicilian, Richter-Rauzer, Rauzer attack, Geller variation	7	42.9%	64.3%
B65	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defence, 9...Nxd4	312	37.5%	58.2%
B66	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6	4274	32.3%	51.6%
B67	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 8...Bd7	1289	30.7%	55.5%
B68	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 9...Be7	53	34.0%	62.3%
B69	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defence, 11.Bxf6	83	32.5%	62.0%
B70	Sicilian, dragon variation	221	36.2%	49.3%
B71	Sicilian, dragon, Levenfish variation	7	28.6%	57.1%
B72	Sicilian, dragon, 6.Be3	18	33.3%	55.6%
B72	Sicilian, dragon, classical attack	10	60.0%	40.0%
B72	Sicilian, dragon, classical, Amsterdam variation	19	31.6%	52.6%
B72	Sicilian, dragon, classical, Grigoriev variation	12	25.0%	45.8%
B72	Sicilian, dragon, classical, Nottingham variation	8	50.0%	50.0%
B73	Sicilian, dragon, classical, 8.O-O	104	47.1%	53.4%
B73	Sicilian, dragon, classical, Richter variation	46	41.3%	59.8%
B73	Sicilian, dragon, classical, Zollner gambit	6	50.0%	58.3%
B74	Sicilian, dragon, classical, 9.Nb3	83	41.0%	50.6%
B74	Sicilian, dragon, classical, Alekhine variation	6	16.7%	75.0%
B74	Sicilian, dragon, classical, Reti-Tartakower variation	35	42.9%	61.4%
B74	Sicilian, dragon, classical, Spielmann variation	8	37.5%	56.3%
B75	Sicilian, dragon, Yugoslav attack	78	30.8%	64.1%
B76	Sicilian, dragon, Yugoslav attack, 7...O-O	74	25.7%	52.0%
B76	Sicilian, dragon, Yugoslav attack, Rauser variation	296	27.4%	67.1%
B77	Sicilian, dragon, Yugoslav attack, 9...Bd7	132	40.9%	59.8%
B77	Sicilian, dragon, Yugoslav attack, 9.Bc4	28	32.1%	58.9%
B78	Sicilian, dragon, Yugoslav attack, 10.O-O-O	102	23.5%	51.0%
B79	Sicilian, dragon, Yugoslav attack, 12.h4	8	25.0%	50.0%
B80	Sicilian, Scheveningen variation	461	31.0%	54.6%
B80	Sicilian, Scheveningen, English variation	79	27.8%	53.2%
B80	Sicilian, Scheveningen, Vitolins variation	3	66.7%	33.3%
B80	Sicilian, Scheveningen, fianchetto variation	93	36.6%	45.2%
B81	Sicilian, Scheveningen, Keres attack	1089	30.8%	61.1%
B82	Sicilian, Scheveningen, 6.f4	210	32.4%	56.2%
B82	Sicilian, Scheveningen, Tal variation	38	34.2%	69.7%
B83	Sicilian, Scheveningen, 6.Be2	319	39.2%	52.2%
B83	Sicilian, modern Scheveningen	190	38.9%	48.9%
B83	Sicilian, modern Scheveningen, main line	207	43.5%	58.5%
B83	Sicilian, modern Scheveningen, main line with Nb3	37	29.7%	66.2%
B84	Sicilian, Scheveningen (Paulsen), classical variation	2020	37.1%	50.3%
B84	Sicilian, Scheveningen, classical, Nd7 system	17	29.4%	55.9%
B85	Sicilian, Scheveningen, classical	91	38.5%	54.4%
B85	Sicilian, Scheveningen, classical main line	208	44.7%	54.6%
B85	Sicilian, Scheveningen, classical variation with ...Qc7 and ...Nc6	2	50.0%	75.0%
B85	Sicilian, Scheveningen, classical, Maroczy system	18	33.3%	50.0%
B86	Sicilian, Sozin attack	45	40.0%	46.7%
B87	Sicilian, Sozin with ...a6 and ...b5	431	36.2%	52.9%
B88	Sicilian, Sozin, Fischer variation	10	60.0%	60.0%
B88	Sicilian, Sozin, Leonhardt variation	247	39.3%	57.3%
B89	Sicilian, Sozin, 7.Be3	562	32.4%	51.6%
B89	Sicilian, Velimirovic attack	402	29.1%	51.4%
B90	Sicilian, Najdorf	696	31.3%	52.7%
B90	Sicilian, Najdorf, Adams attack	27	40.7%	57.4%
B90	Sicilian, Najdorf, Byrne (English) attack	6993	30.9%	53.2%
B90	Sicilian, Najdorf, Lipnitzky attack	266	31.6%	48.5%
B91	Sicilian, Najdorf, Zagreb (fianchetto) variation	143	34.3%	55.6%
B92	Sicilian, Najdorf, Opovcensky variation	1567	38.3%	52.6%
B93	Sicilian, Najdorf, 6.f4	655	40.3%	50.8%
B94	Sicilian, Najdorf, 6.Bg5	61	27.9%	59.8%
B95	Sicilian, Najdorf, 6...e6	78	30.8%	41.0%
B96	Sicilian, Najdorf, 7.f4	172	36.0%	45.9%
B96	Sicilian, Najdorf, Polugayevsky variation	24	33.3%	54.2%
B96	Sicilian, Najdorf, Polugayevsky, Simagin variation	17	29.4%	55.9%
B97	Sicilian, Najdorf, 7...Qb6	394	26.9%	45.9%
B97	Sicilian, Najdorf, Poisoned pawn variation	578	44.5%	48.4%
B98	Sicilian, Najdorf variation	74	32.4%	64.9%
B98	Sicilian, Najdorf, 7...Be7	62	38.7%	53.2%
B98	Sicilian, Najdorf, Browne variation	21	23.8%	78.6%
B98	Sicilian, Najdorf, Goteborg (Argentine) variation	16	25.0%	50.0%
B99	Sicilian, Najdorf, 7...Be7 main line	345	24.6%	54.3%
C00	French defence	158	34.8%	57.9%
C00	French defence, Steiner variation	204	42.6%	51.2%
C00	French, Alapin variation	2	100.0%	50.0%
C00	French, Chigorin variation	295	31.9%	50.8%
C00	French, King's Indian attack	918	39.4%	50.4%
C00	French, Labourdonnais variation	171	30.4%	42.7%
C00	French, Pelikan variation	35	34.3%	48.6%
C00	French, Reti (Spielmann) variation	10	40.0%	50.0%
C00	French, Reversed Philidor formation	8	50.0%	62.5%
C00	French, Schlechter variation	90	42.2%	45.6%
C00	French, Steinitz attack	3	0.0%	33.3%
C00	French, Two knights variation	56	35.7%	53.6%
C00	French, Wing gambit	4	25.0%	62.5%
C00	Lengfellner system	1	0.0%	100.0%
C00	St. George defence	26	53.8%	65.4%
C01	French, exchange variation	525	38.1%	54.9%
C01	French, exchange, Svenonius variation	10	40.0%	40.0%
C02	French, advance variation	290	25.5%	56.6%
C02	French, advance, Euwe variation	329	34.7%	54.1%
C02	French, advance, Milner-Barry gambit	11	54.5%	45.5%
C02	French, advance, Nimzovich system	16	37.5%	31.3%
C02	French, advance, Paulsen attack	372	35.5%	53.8%
C02	French, advance, Steinitz variation	90	30.0%	37.2%
C02	French, advance, Wade variation	79	31.6%	62.7%
C03	French, Tarrasch	539	41.9%	57.5%
C03	French, Tarrasch, Guimard variation	23	21.7%	63.0%
C04	French, Tarrasch, Guimard main line	84	21.4%	59.5%
C05	French, Tarrasch, Botvinnik variation	17	23.5%	58.8%
C05	French, Tarrasch, closed variation	340	32.6%	57.8%
C06	French, Tarrasch, Leningrad variation	10	10.0%	95.0%
C06	French, Tarrasch, closed variation, main line	596	37.2%	59.4%
C07	French, Tarrasch, Eliskases variation	18	33.3%	44.4%
C07	French, Tarrasch, open variation	1152	47.3%	51.3%
C08	French, Tarrasch, open, 4.ed ed	539	49.4%	54.5%
C09	French, Tarrasch, open variation, main line	557	46.9%	57.5%
C10	French, Fort Knox variation	329	35.3%	52.6%
C10	French, Frere (Becker) variation	7	28.6%	71.4%
C10	French, Paulsen variation	302	27.2%	55.3%
C10	French, Rubinstein variation	506	46.6%	54.3%
C10	French, Rubinstein, Capablanca line	2	50.0%	75.0%
C11	French defence	82	34.1%	51.2%
C11	French, Burn variation	1528	38.7%	55.2%
C11	French, Henneberger variation	9	33.3%	61.1%
C11	French, Steinitz variation	229	34.9%	59.0%
C11	French, Steinitz, Boleslavsky variation	740	34.6%	55.4%
C11	French, Steinitz, Bradford attack	1	100.0%	50.0%
C11	French, Steinitz, Gledhill attack	1	100.0%	50.0%
C11	French, Swiss variation	33	36.4%	57.6%
C12	French, MacCutcheon variation	53	35.8%	50.0%
C12	French, MacCutcheon, Chigorin variation	1	0.0%	0.0%
C12	French, MacCutcheon, Dr. Olland (Dutch) variation	4	0.0%	100.0%
C12	French, MacCutcheon, Grigoriev variation	3	100.0%	50.0%
C12	French, MacCutcheon, Janowski variation	26	38.5%	69.2%
C12	French, MacCutcheon, Lasker variation	105	22.9%	57.1%
C12	French, MacCutcheon, Lasker variation, 8...g6	148	31.1%	57.4%
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	13	38.5%	50.0%
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	3	33.3%	83.3%
C13	French, classical, Vistaneckis (Nimzovich) variation	9	0.0%	66.7%
C14	French, classical variation	1	100.0%	50.0%
C14	French, classical, Alapin variation	11	54.5%	63.6%
C14	French, classical, Pollock variation	4	25.0%	62.5%
C14	French, classical, Rubinstein variation	8	62.5%	56.3%
C14	French, classical, Stahlberg variation	1	100.0%	50.0%
C14	French, classical, Steinitz variation	171	32.2%	57.6%
C14	French, classical, Tarrasch variation	2	0.0%	50.0%
C15	French, Winawer (Nimzovich) variation	192	37.5%	55.7%
C15	French, Winawer, Alekhine (Maroczy) gambit	46	43.5%	60.9%
C15	French, Winawer, Alekhine gambit, Kan variation	35	54.3%	38.6%
C15	French, Winawer, fingerslip variation	14	35.7%	39.3%
C16	French, Winawer, Petrosian variation	55	36.4%	54.5%
C16	French, Winawer, advance variation	287	35.9%	57.7%
C17	French, Winawer, advance variation	23	39.1%	71.7%
C17	French, Winawer, advance, 5.a3	145	27.6%	61.4%
C17	French, Winawer, advance, Bogolyubov variation	186	31.7%	50.3%
C17	French, Winawer, advance, Russian variation	17	47.1%	41.2%
C18	French, Winawer, advance variation	46	23.9%	66.3%
C18	French, Winawer, classical variation	83	27.7%	54.8%
C19	French, Winawer, advance, 6...Ne7	95	36.8%	58.4%
C19	French, Winawer, advance, Smyslov variation	63	22.2%	65.1%
C19	French, Winawer, advance, poisoned pawn variation	1185	32.2%	59.9%
C19	French, Winawer, advance, poisoned pawn, Euwe-Gligoric variation	2	0.0%	0.0%
C19	French, Winawer, advance, poisoned pawn, Konstantinopolsky variation	190	25.8%	63.9%
C19	French, Winawer, advance, positional main line	577	27.6%	56.4%
C20	Alapin's opening	7	14.3%	64.3%
C20	KP, Indian opening	8	62.5%	31.3%
C20	KP, King's head opening	1	100.0%	50.0%
C20	KP, Lopez opening	2	50.0%	25.0%
C20	KP, Napoleon's opening	2	0.0%	0.0%
C20	King's pawn game	2	0.0%	50.0%
C21	Centre game	63	46.0%	70.6%
C21	Danish gambit	2	50.0%	75.0%
C22	Centre game	3	33.3%	16.7%
C22	Centre game, Berger variation	78	28.2%	67.9%
C22	Centre game, Paulsen attack	6	16.7%	58.3%
C23	Bishop's opening	99	36.4%	55.6%
C23	Bishop's opening, Calabrese counter-gambit, Jaenisch variation	3	0.0%	100.0%
C23	Bishop's opening, Classical variation	29	34.5%	51.7%
C23	Bishop's opening, Lisitsyn variation	1	0.0%	0.0%
C23	Bishop's opening, Philidor counter-attack	29	55.2%	69.0%
C23	Bishop's opening, Philidor variation	9	44.4%	55.6%
C24	Bishop's opening, Berlin defence	216	37.0%	55.1%
C24	Bishop's opening, Urusov gambit	9	22.2%	33.3%
C25	Vienna gambit	6	50.0%	58.3%
C25	Vienna game	106	34.0%	56.6%
C25	Vienna, Paulsen variation	35	25.7%	64.3%
C25	Vienna, Pierce gambit	3	100.0%	50.0%
C26	Vienna game	55	32.7%	61.8%
C26	Vienna, Falkbeer variation	10	40.0%	40.0%
C26	Vienna, Mengarini variation	3	33.3%	16.7%
C26	Vienna, Paulsen-Mieses variation	102	37.3%	47.1%
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%
C27	Vienna, `Frankenstein-Dracula' variation	1	0.0%	100.0%
C28	Vienna game	89	41.6%	47.8%
C29	Vienna gambit	19	21.1%	52.6%
C29	Vienna gambit, Breyer variation	25	44.0%	62.0%
C29	Vienna gambit, Kaufmann variation	6	33.3%	66.7%
C30	KGD, 2...Nf6	2	50.0%	25.0%
C30	KGD, Keene's defence	3	33.3%	83.3%
C30	KGD, classical variation	19	26.3%	65.8%
C30	KGD, classical, 4.c3	4	25.0%	62.5%
C30	KGD, classical, Reti variation	1	100.0%	50.0%
C30	KGD, classical, Svenonius variation	1	100.0%	50.0%
C30	King's gambit	4	0.0%	100.0%
C31	KGD, Falkbeer, Rubinstein variation	1	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, Carrera (Basman) gambit	1	0.0%	100.0%
C33	KGA, Keres (Mason-Steinitz) gambit	2	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	19	31.6%	57.9%
C33	KGA, bishop's gambit, McDonnell attack	1	0.0%	100.0%
C33	KGA, bishop's gambit, Paulsen attack	2	0.0%	50.0%
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	3	33.3%	83.3%
C34	KGA, Bonsch-Osmolovsky variation	2	0.0%	50.0%
C34	KGA, Fischer defence	12	25.0%	54.2%
C34	KGA, Schallop defence	8	25.0%	75.0%
C34	King's knight's gambit	1	100.0%	50.0%
C35	KGA, Cunningham defence	6	16.7%	41.7%
C35	KGA, Cunningham, Euwe defence	5	20.0%	50.0%
C36	KGA, Abbazia defence (classical defence, modern defence[!])	5	0.0%	100.0%
C36	KGA, Abbazia defence, modern variation	12	33.3%	58.3%
C37	KGA, Blachly gambit	1	0.0%	0.0%
C37	KGA, Muzio gambit	1	100.0%	50.0%
C37	KGA, Muzio gambit, Brentano defence	2	50.0%	75.0%
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	7	28.6%	28.6%
C39	KGA, Kieseritsky, Berlin defence, 6.Bc4	7	14.3%	7.1%
C39	KGA, Kieseritsky, Kolisch defence	9	55.6%	61.1%
C39	KGA, Kieseritsky, Neumann defence	2	0.0%	100.0%
C39	KGA, Kieseritsky, Paulsen defence	2	0.0%	50.0%
C39	KGA, Kieseritsky, Rice gambit	10	20.0%	40.0%
C39	KGA, Kieseritsky, long whip (Stockwhip, classical) defence	1	0.0%	0.0%
C40	Gunderam defence	38	28.9%	64.5%
C40	Latvian, Fraser defence	1	100.0%	50.0%
C40	Latvian, Polerio variation	5	80.0%	60.0%
C40	QP counter-gambit (elephant gambit)	2	50.0%	75.0%
C41	Philidor's defence	51	37.3%	53.9%
C41	Philidor, Hanham variation	5	60.0%	70.0%
C41	Philidor, Hanham, Delmar variation	2	100.0%	50.0%
C41	Philidor, Hanham, Krause variation	5	40.0%	40.0%
C41	Philidor, Hanham, Schlechter variation	14	21.4%	60.7%
C41	Philidor, Hanham, Steiner variation	11	45.5%	50.0%
C41	Philidor, Improved Hanham variation	208	38.9%	57.9%
C41	Philidor, Larsen variation	10	40.0%	50.0%
C41	Philidor, Nimzovich (Jaenisch) variation	2	50.0%	25.0%
C41	Philidor, Nimzovich, Klein variation	1	100.0%	50.0%
C41	Philidor, Nimzovich, Rellstab variation	14	50.0%	67.9%
C41	Philidor, Nimzovich, Sokolsky variation	3	66.7%	66.7%
C41	Philidor, Nimzovich, Sozin variation	3	66.7%	33.3%
C41	Philidor, Philidor counter-gambit	1	100.0%	50.0%
C41	Philidor, Philidor counter-gambit, Zukertort variation	4	25.0%	87.5%
C41	Philidor, Philidor counter-gambit, del Rio attack	1	0.0%	100.0%
C41	Philidor, Steinitz variation	3	33.3%	16.7%
C41	Philidor, exchange variation	78	34.6%	50.6%
C42	Petrov three knights game	75	26.7%	61.3%
C42	Petrov's defence	117	41.9%	50.0%
C42	Petrov, Cochrane gambit	7	42.9%	35.7%
C42	Petrov, Cozio (Lasker) attack	158	45.6%	57.0%
C42	Petrov, Damiano variation	1	0.0%	100.0%
C42	Petrov, French attack	2	50.0%	75.0%
C42	Petrov, Italian variation	39	28.2%	55.1%
C42	Petrov, Kaufmann attack	67	43.3%	42.5%
C42	Petrov, Nimzovich attack	103	39.8%	61.7%
C42	Petrov, Paulsen attack	52	28.8%	54.8%
C42	Petrov, classical attack	157	46.5%	54.5%
C42	Petrov, classical attack, Berger variation	7	57.1%	71.4%
C42	Petrov, classical attack, Chigorin variation	234	35.9%	56.4%
C42	Petrov, classical attack, Jaenisch variation	858	44.1%	59.2%
C42	Petrov, classical attack, Krause variation	1	0.0%	100.0%
C42	Petrov, classical attack, Marshall variation	497	38.8%	56.8%
C42	Petrov, classical attack, Mason variation	30	33.3%	60.0%
C42	Petrov, classical attack, Tarrasch variation	1	0.0%	100.0%
C42	Petrov, classical attack, close variation	51	35.3%	64.7%
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	613	40.6%	50.7%
C43	Petrov, modern attack, Trifunovic variation	28	46.4%	48.2%
C43	Petrov, modern attack, main line	101	40.6%	60.9%
C44	Inverted Hanham	13	23.1%	42.3%
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	12	41.7%	62.5%
C44	Ponziani, Caro variation	2	0.0%	0.0%
C44	Ponziani, Jaenisch counter-attack	70	32.9%	55.0%
C44	Ponziani, Reti variation	2	50.0%	25.0%
C44	Ponziani, Steinitz variation	2	0.0%	100.0%
C44	Scotch gambit	13	38.5%	42.3%
C44	Scotch gambit, Anderssen (Paulsen, Suhle) counter-attack	7	57.1%	28.6%
C44	Scotch gambit, Benima defence	5	40.0%	60.0%
C44	Scotch gambit, Dubois-Reti defence	117	35.9%	51.3%
C44	Scotch, Goering gambit	24	41.7%	45.8%
C44	Scotch, Lolli variation	11	45.5%	50.0%
C44	Scotch, Relfsson gambit ('MacLopez')	1	0.0%	100.0%
C45	Scotch game	1054	38.9%	53.5%
C45	Scotch, Blackburne attack	1	0.0%	0.0%
C45	Scotch, Blumenfeld attack	14	50.0%	32.1%
C45	Scotch, Ghulam Kassim variation	2	100.0%	50.0%
C45	Scotch, Horwitz attack	14	28.6%	71.4%
C45	Scotch, Meitner variation	5	80.0%	40.0%
C45	Scotch, Mieses variation	484	32.9%	55.3%
C45	Scotch, Potter variation	30	50.0%	48.3%
C45	Scotch, Romanishin variation	15	40.0%	73.3%
C45	Scotch, Schmidt variation	224	59.4%	42.6%
C45	Scotch, Steinitz variation	6	0.0%	83.3%
C45	Scotch, Tartakower variation	2	50.0%	25.0%
C46	Four knights game	189	47.6%	47.1%
C46	Four knights, Gunsberg variation	14	50.0%	39.3%
C46	Four knights, Italian variation	39	38.5%	50.0%
C46	Four knights, Schultze-Mueller gambit	1	0.0%	100.0%
C46	Three knights game	54	38.9%	50.9%
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	155	47.7%	52.9%
C47	Four knights, Scotch, Krause variation	13	46.2%	61.5%
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	376	37.2%	56.4%
C48	Four knights, Rubinstein counter-gambit, Bogolyubov variation	2	0.0%	50.0%
C48	Four knights, Rubinstein counter-gambit, Henneberger variation	16	43.8%	40.6%
C48	Four knights, Rubinstein counter-gambit, exchange variation	53	71.7%	56.6%
C48	Four knights, Spanish variation	55	54.5%	58.2%
C48	Four knights, Spanish, classical defence	11	9.1%	40.9%
C48	Four knights, Spielmann variation	1	0.0%	0.0%
C49	Four knights	18	55.6%	50.0%
C49	Four knights, Gunsberg counter-attack	1	100.0%	50.0%
C49	Four knights, Janowski variation	7	28.6%	57.1%
C49	Four knights, Nimzovich (Paulsen) variation	19	52.6%	63.2%
C49	Four knights, double Ruy Lopez	16	56.3%	65.6%
C49	Four knights, symmetrical variation	90	36.7%	57.2%
C49	Four knights, symmetrical, Capablanca variation	8	62.5%	56.3%
C49	Four knights, symmetrical, Maroczy system	29	41.4%	51.7%
C49	Four knights, symmetrical, Metger unpin	176	35.8%	54.3%
C49	Four knights, symmetrical, Pillsbury variation	11	45.5%	40.9%
C50	Giuoco Pianissimo	381	36.5%	50.8%
C50	Giuoco Pianissimo, Canal variation	101	47.5%	53.5%
C50	Giuoco Pianissimo, Italian four knights variation	141	39.7%	52.5%
C50	Giuoco Piano	52	40.4%	49.0%
C50	Giuoco Piano, four knights variation	11	18.2%	45.5%
C50	Hungarian defence	55	23.6%	50.0%
C50	King's pawn game	134	33.6%	58.6%
C51	Evans gambit declined	3	0.0%	100.0%
C51	Evans gambit declined, 5.a4	104	35.6%	42.8%
C51	Evans gambit declined, Showalter variation	2	0.0%	50.0%
C51	Evans gambit, 5...Be7	1	0.0%	0.0%
C51	Evans gambit, Cordel variation	9	66.7%	44.4%
C51	Evans gambit, Goering attack	2	0.0%	50.0%
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	5	60.0%	50.0%
C51	Evans gambit, normal variation	4	0.0%	25.0%
C52	Evans gambit	19	36.8%	50.0%
C52	Evans gambit, Lasker defence	5	20.0%	30.0%
C52	Evans gambit, Richardson attack	4	50.0%	25.0%
C52	Evans gambit, Tartakower attack	1	0.0%	0.0%
C52	Evans gambit, Waller attack	2	0.0%	100.0%
C52	Evans gambit, compromised defence	5	20.0%	70.0%
C52	Evans gambit, compromised defence, Paulsen variation	11	54.5%	54.5%
C53	Giuoco Piano	853	36.3%	55.2%
C53	Giuoco Piano, Anderssen variation	3	33.3%	50.0%
C53	Giuoco Piano, Bird's attack	67	26.9%	50.7%
C53	Giuoco Piano, LaBourdonnais variation	3	0.0%	66.7%
C53	Giuoco Piano, Mestel variation	1	100.0%	50.0%
C53	Giuoco Piano, centre-holding variation	6	66.7%	50.0%
C53	Giuoco Piano, close variation	5	0.0%	80.0%
C54	Giuoco Piano	43	46.5%	53.5%
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	16	37.5%	56.3%
C55	Two knights defence (Modern bishop's opening)	430	37.2%	56.7%
C55	Two knights defence, Perreux variation	6	50.0%	58.3%
C55	Two knights, Max Lange attack, Schlechter variation	2	100.0%	50.0%
C55	Two knights, Max Lange attack, Steinitz variation	4	25.0%	87.5%
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, Fritz variation	2	100.0%	50.0%
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	35	42.9%	52.9%
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	96	41.7%	55.2%
C59	Two knights defence, Goering variation	4	25.0%	12.5%
C59	Two knights defence, Steinitz variation	225	28.0%	50.4%
C60	Ruy Lopez (Spanish opening)	8	62.5%	43.8%
C60	Ruy Lopez, Cozio defence	42	50.0%	53.6%
C60	Ruy Lopez, Cozio defence, Paulsen variation	7	14.3%	78.6%
C60	Ruy Lopez, fianchetto (Smyslov/Barnes) defence	85	34.1%	54.7%
C61	Ruy Lopez, Bird's defence	38	39.5%	61.8%
C61	Ruy Lopez, Bird's defence, Paulsen variation	1	0.0%	100.0%
C62	Ruy Lopez, old Steinitz defence	132	28.0%	55.7%
C62	Ruy Lopez, old Steinitz defence, Nimzovich attack	5	20.0%	50.0%
C63	Ruy Lopez, Schliemann defence	12	25.0%	54.2%
C63	Ruy Lopez, Schliemann defence, Berger variation	48	29.2%	60.4%
C64	Ruy Lopez, Cordel gambit	14	50.0%	39.3%
C64	Ruy Lopez, classical (Cordel) defence	69	31.9%	53.6%
C64	Ruy Lopez, classical defence, 4.c3	48	33.3%	56.3%
C64	Ruy Lopez, classical defence, Benelux variation	213	36.2%	56.6%
C64	Ruy Lopez, classical defence, Charousek variation	3	33.3%	83.3%
C65	Ruy Lopez, Berlin defence	269	30.5%	47.6%
C65	Ruy Lopez, Berlin defence, 4.O-O	36	27.8%	47.2%
C65	Ruy Lopez, Berlin defence, Beverwijk variation	173	34.1%	53.5%
C65	Ruy Lopez, Berlin defence, Duras variation	10	30.0%	45.0%
C65	Ruy Lopez, Berlin defence, Kaufmann variation	3	66.7%	66.7%
C65	Ruy Lopez, Berlin defence, Nyholm attack	26	46.2%	61.5%
C66	Ruy Lopez, Berlin defence, 4.O-O, d6	58	53.4%	50.9%
C66	Ruy Lopez, Berlin defence, hedgehog variation	77	58.4%	59.1%
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	9	33.3%	50.0%
C67	Ruy Lopez, Berlin defence, Minckwitz variation	11	45.5%	68.2%
C67	Ruy Lopez, Berlin defence, Pillsbury variation	1	0.0%	0.0%
C67	Ruy Lopez, Berlin defence, Rosenthal variation	6	33.3%	83.3%
C67	Ruy Lopez, Berlin defence, Trifunovic variation	4	25.0%	87.5%
C67	Ruy Lopez, Berlin defence, Winawer attack	12	25.0%	79.2%
C67	Ruy Lopez, Berlin defence, Zukertort variation	5	20.0%	70.0%
C67	Ruy Lopez, Berlin defence, open variation	969	44.0%	52.7%
C67	Ruy Lopez, open Berlin defence, 5...Be7	27	29.6%	51.9%
C67	Ruy Lopez, open Berlin defence, Showalter variation	2	50.0%	25.0%
C67	Ruy Lopez, open Berlin defence, l'Hermet variation	12	41.7%	29.2%
C68	Ruy Lopez, exchange variation	30	43.3%	55.0%
C68	Ruy Lopez, exchange, Alekhine variation	10	40.0%	30.0%
C68	Ruy Lopez, exchange, Keres variation	28	67.9%	51.8%
C68	Ruy Lopez, exchange, Romanovsky variation	5	40.0%	60.0%
C69	Ruy Lopez, exchange variation, 5.O-O	157	40.1%	50.0%
C69	Ruy Lopez, exchange variation, Alapin gambit	23	30.4%	45.7%
C69	Ruy Lopez, exchange, Bronstein variation	148	31.8%	50.3%
C69	Ruy Lopez, exchange, Gligoric variation	207	37.7%	64.7%
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	17	29.4%	55.9%
C70	Ruy Lopez, Classical defence deferred	64	46.9%	54.7%
C70	Ruy Lopez, Cozio defence deferred	4	25.0%	37.5%
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	77	32.5%	66.9%
C70	Ruy Lopez, fianchetto defence deferred	2	50.0%	25.0%
C71	Ruy Lopez, modern Steinitz defence	34	35.3%	55.9%
C71	Ruy Lopez, modern Steinitz defence, Duras (Keres) variation	41	39.0%	48.8%
C71	Ruy Lopez, modern Steinitz defence, Three knights variation	8	50.0%	50.0%
C72	Ruy Lopez, modern Steinitz defence, 5.O-O	129	41.1%	61.6%
C73	Ruy Lopez, modern Steinitz defence, Alapin variation	32	31.3%	56.3%
C73	Ruy Lopez, modern Steinitz defence, Richter variation	46	45.7%	53.3%
C74	Ruy Lopez, Siesta, Kopayev variation	30	26.7%	46.7%
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	38	44.7%	53.9%
C75	Ruy Lopez, modern Steinitz defence, Rubinstein variation	32	28.1%	57.8%
C76	Ruy Lopez, modern Steinitz defence, fianchetto (Bronstein) variation	141	36.2%	52.8%
C77	Ruy Lopez, Anderssen variation	130	46.2%	53.8%
C77	Ruy Lopez, Morphy defence	126	39.7%	57.9%
C77	Ruy Lopez, Morphy defence, Duras variation	7	28.6%	42.9%
C77	Ruy Lopez, Treybal (Bayreuth) variation (exchange var. deferred)	26	50.0%	51.9%
C77	Ruy Lopez, Wormald (Alapin) attack	78	29.5%	59.6%
C77	Ruy Lopez, Wormald attack, Gruenfeld variation	2	100.0%	50.0%
C77	Ruy Lopez, four knights (Tarrasch) variation	48	39.6%	51.0%
C78	Ruy Lopez, ...b5 & ...d6	9	11.1%	61.1%
C78	Ruy Lopez, 5.O-O	305	44.3%	60.2%
C78	Ruy Lopez, Archangelsk (counterthrust) variation	329	37.7%	55.9%
C78	Ruy Lopez, Moeller defence	243	37.4%	53.7%
C78	Ruy Lopez, Wing attack	2	0.0%	100.0%
C79	Ruy Lopez, Steinitz defence deferred (Russian defence)	119	33.6%	55.5%
C79	Ruy Lopez, Steinitz defence deferred, Lipnitsky variation	12	66.7%	58.3%
C79	Ruy Lopez, Steinitz defence deferred, Rubinstein variation	8	50.0%	37.5%
C80	Ruy Lopez, open (Tarrasch) defence	42	38.1%	59.5%
C80	Ruy Lopez, open, 6.d4	11	27.3%	40.9%
C80	Ruy Lopez, open, 7.Bb3	45	40.0%	55.6%
C80	Ruy Lopez, open, 8...Be6	325	34.5%	47.7%
C80	Ruy Lopez, open, Berger variation	2	100.0%	50.0%
C80	Ruy Lopez, open, Bernstein variation	213	41.8%	64.1%
C80	Ruy Lopez, open, Bernstein variation, Karpov gambit	17	41.2%	44.1%
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	25	48.0%	52.0%
C81	Ruy Lopez, open, Howell attack, Adam variation	1	0.0%	0.0%
C82	Ruy Lopez, open, Berlin variation	12	33.3%	66.7%
C82	Ruy Lopez, open, Dilworth variation	24	45.8%	52.1%
C82	Ruy Lopez, open, Italian variation	14	21.4%	75.0%
C82	Ruy Lopez, open, Motzko attack	11	54.5%	54.5%
C82	Ruy Lopez, open, Motzko attack, Nenarokov variation	3	33.3%	83.3%
C82	Ruy Lopez, open, St. Petersburg variation	55	38.2%	59.1%
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	58	44.8%	51.7%
C84	Ruy Lopez, closed defence	524	39.1%	52.8%
C84	Ruy Lopez, closed, Basque gambit (North Spanish variation)	2	50.0%	25.0%
C84	Ruy Lopez, closed, centre attack	26	42.3%	48.1%
C85	Ruy Lopez, Exchange variation doubly deferred (DERLD)	582	36.4%	49.5%
C86	Ruy Lopez, Worrall attack	11	54.5%	54.5%
C86	Ruy Lopez, Worrall attack, sharp line	70	31.4%	57.1%
C86	Ruy Lopez, Worrall attack, solid line	30	43.3%	58.3%
C87	Ruy Lopez, closed, Averbach variation	130	35.4%	60.0%
C88	Ruy Lopez, Trajkovic counter-attack	21	28.6%	57.1%
C88	Ruy Lopez, closed	452	38.3%	52.3%
C88	Ruy Lopez, closed, 7...O-O	1115	35.6%	54.5%
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	583	36.2%	51.4%
C89	Ruy Lopez, Marshall counter-attack	71	40.8%	51.4%
C89	Ruy Lopez, Marshall counter-attack, 11...c6	59	44.1%	52.5%
C89	Ruy Lopez, Marshall, Herman Steiner variation	1	100.0%	50.0%
C89	Ruy Lopez, Marshall, Kevitz variation	2	100.0%	50.0%
C89	Ruy Lopez, Marshall, main line, 12.d2d4	104	43.3%	60.1%
C89	Ruy Lopez, Marshall, main line, 14...Qh3	115	36.5%	54.8%
C90	Ruy Lopez, closed (with ...d6)	627	33.7%	51.0%
C90	Ruy Lopez, closed, Lutikov variation	6	50.0%	58.3%
C90	Ruy Lopez, closed, Pilnik variation	465	35.3%	49.5%
C90	Ruy Lopez, closed, Suetin variation	19	31.6%	57.9%
C91	Ruy Lopez, closed, 9.d4	577	34.0%	56.3%
C91	Ruy Lopez, closed, Bogolyubov variation	2084	39.1%	54.7%
C92	Ruy Lopez, closed, 9.h3	223	45.3%	49.1%
C92	Ruy Lopez, closed, Flohr-Zaitsev system (Lenzerheide variation)	1496	39.2%	55.6%
C92	Ruy Lopez, closed, Keres (9...a5) variation	11	63.6%	50.0%
C92	Ruy Lopez, closed, Kholmov variation	95	32.6%	64.7%
C92	Ruy Lopez, closed, Ragozin-Petrosian (`Keres') variation	229	40.6%	65.7%
C93	Ruy Lopez, closed, Smyslov defence	98	42.9%	55.1%
C94	Ruy Lopez, closed, Breyer defence	22	27.3%	59.1%
C95	Ruy Lopez, closed, Breyer, Borisenko variation	640	39.1%	56.3%
C95	Ruy Lopez, closed, Breyer, Gligoric variation	31	45.2%	58.1%
C95	Ruy Lopez, closed, Breyer, Simagin variation	12	33.3%	75.0%
C96	Ruy Lopez, closed (10...c5)	326	35.0%	59.2%
C96	Ruy Lopez, closed (8...Na5)	10	40.0%	70.0%
C96	Ruy Lopez, closed, Borisenko defence	37	37.8%	56.8%
C96	Ruy Lopez, closed, Keres (...Nd7) defence	130	33.1%	64.2%
C96	Ruy Lopez, closed, Rossolimo defence	2	0.0%	0.0%
C97	Ruy Lopez, closed, Chigorin defence	536	31.7%	63.4%
C98	Ruy Lopez, closed, Chigorin, 12...Nc6	158	31.0%	61.1%
C99	Ruy Lopez, closed, Chigorin, 12...c5d4	890	40.8%	62.6%
D00	Blackmar gambit	5	80.0%	40.0%
D00	Levitsky attack (Queen's bishop attack)	291	34.4%	49.5%
D00	Queen's pawn game	46	37.0%	57.6%
D00	Queen's pawn, Chigorin variation	19	47.4%	55.3%
D00	Queen's pawn, Mason variation	272	40.4%	51.5%
D00	Queen's pawn, Mason variation, Steinitz counter-gambit	23	43.5%	56.5%
D00	Queen's pawn, stonewall attack	6	16.7%	58.3%
D01	Richter-Veresov attack	116	31.0%	44.0%
D01	Richter-Veresov attack, Richter variation	3	66.7%	66.7%
D01	Richter-Veresov attack, Veresov variation	9	44.4%	55.6%
D02	Queen's bishop game	435	32.6%	51.0%
D02	Queen's pawn game	2218	36.9%	52.8%
D02	Queen's pawn game, Chigorin variation	90	44.4%	60.0%
D02	Queen's pawn game, Krause variation	110	43.6%	50.9%
D03	Torre attack (Tartakower variation)	122	40.2%	50.4%
D04	Queen's pawn game	185	36.2%	50.0%
D05	Colle system	16	37.5%	56.3%
D05	Queen's pawn game	135	32.6%	53.3%
D05	Queen's pawn game, Rubinstein (Colle-Zukertort) variation	48	39.6%	57.3%
D05	Queen's pawn game, Zukertort variation	8	25.0%	62.5%
D06	QGD, Grau (Sahovic) defence	34	32.4%	66.2%
D06	QGD, Marshall defence	47	48.9%	60.6%
D06	QGD, symmetrical (Austrian) defence	1	0.0%	0.0%
D07	QGD, Chigorin defence	376	35.1%	57.7%
D07	QGD, Chigorin defence, Janowski variation	22	27.3%	68.2%
D08	QGD, Albin counter-gambit	16	31.3%	65.6%
D09	QGD, Albin counter-gambit, 5.g3	7	28.6%	57.1%
D10	QGD Slav defence	919	35.0%	52.8%
D10	QGD Slav defence, Alekhine variation	24	29.2%	56.3%
D10	QGD Slav defence, exchange variation	397	41.6%	54.8%
D10	QGD Slav, Winawer counter-gambit	48	22.9%	49.0%
D11	QGD Slav, 3.Nf3	516	39.9%	54.8%
D11	QGD Slav, 4.e3	413	36.1%	54.8%
D11	QGD Slav, Breyer variation	27	33.3%	64.8%
D12	QGD Slav, 4.e3 Bf5	819	39.3%	53.0%
D12	QGD Slav, Amsterdam variation	10	50.0%	55.0%
D12	QGD Slav, exchange variation	29	27.6%	48.3%
D13	QGD Slav, exchange variation	274	42.0%	56.8%
D14	QGD Slav, exchange variation, 6.Bf4 Bf5	244	44.7%	50.2%
D14	QGD Slav, exchange, Trifunovic variation	43	44.2%	54.7%
D15	QGD Slav accepted	24	37.5%	39.6%
D15	QGD Slav, 4.Nc3	690	35.9%	52.5%
D15	QGD Slav, 5.e3 (Alekhine variation)	50	36.0%	48.0%
D15	QGD Slav, Schlechter variation	89	42.7%	61.8%
D15	QGD Slav, Slav gambit	2	0.0%	50.0%
D15	QGD Slav, Suechting variation	19	31.6%	68.4%
D15	QGD Slav, Tolush-Geller gambit	19	42.1%	42.1%
D16	QGD Slav accepted, Alapin variation	43	27.9%	67.4%
D16	QGD Slav, Smyslov variation	30	36.7%	55.0%
D16	QGD Slav, Soultanbeieff variation	12	41.7%	62.5%
D16	QGD Slav, Steiner variation	57	33.3%	67.5%
D17	QGD Slav, Carlsbad variation	215	40.0%	58.1%
D17	QGD Slav, Czech defence	101	42.6%	50.0%
D17	QGD Slav, Krause attack	185	35.7%	57.3%
D17	QGD Slav, Wiesbaden variation	253	43.5%	56.9%
D18	QGD Slav, Dutch variation	59	35.6%	56.8%
D18	QGD Slav, Dutch, Lasker variation	2	50.0%	75.0%
D19	QGD Slav, Dutch variation	638	37.9%	57.4%
D19	QGD Slav, Dutch variation, main line	102	40.2%	59.3%
D20	QGA, 3.e4	621	37.7%	58.9%
D20	QGA, Linares variation	26	34.6%	59.6%
D20	Queen's gambit accepted	365	41.9%	57.4%
D21	QGA, 3.Nf3	115	40.0%	57.4%
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	50	44.0%	58.0%
D22	QGA, Alekhine defence, Alatortsev variation	3	33.3%	16.7%
D22	QGA, Haberditz variation	5	80.0%	40.0%
D23	QGA, Mannheim variation	53	34.0%	50.9%
D23	Queen's gambit accepted	4	75.0%	37.5%
D24	QGA, 4.Nc3	91	35.2%	51.6%
D24	QGA, Bogolyubov variation	33	66.7%	54.5%
D25	QGA, 4.e3	24	45.8%	56.3%
D25	QGA, Flohr variation	20	35.0%	62.5%
D25	QGA, Janowsky-Larsen variation	142	39.4%	59.2%
D25	QGA, Smyslov variation	35	57.1%	60.0%
D26	QGA, 4...e6	123	45.5%	53.7%
D26	QGA, classical variation	373	50.7%	51.1%
D26	QGA, classical variation, 6.O-O	42	50.0%	60.7%
D26	QGA, classical, Furman variation	1	0.0%	0.0%
D26	QGA, classical, Steinitz variation	10	40.0%	70.0%
D27	QGA, classical, 6...a6	1086	46.9%	53.3%
D27	QGA, classical, Geller variation	42	47.6%	50.0%
D27	QGA, classical, Rubinstein variation	852	45.1%	55.5%
D28	QGA, classical, 7...b5	45	35.6%	62.2%
D28	QGA, classical, 7.Qe2	29	41.4%	58.6%
D29	QGA, classical, 8...Bb7	153	37.9%	44.4%
D29	QGA, classical, Smyslov variation	18	38.9%	47.2%
D30	QGD	153	41.2%	55.2%
D30	QGD Slav	59	52.5%	58.5%
D30	QGD Slav, Semmering variation	4	75.0%	62.5%
D30	QGD, Capablanca variation	4	50.0%	25.0%
D30	QGD, Capablanca-Duras variation	90	42.2%	56.7%
D30	QGD, Hastings variation	69	44.9%	54.3%
D30	QGD, Vienna variation	34	32.4%	51.5%
D30	Queen's gambit declined	1883	39.7%	54.9%
D31	QGD, 3.Nc3	97	39.2%	55.7%
D31	QGD, Alapin variation	2	50.0%	75.0%
D31	QGD, Charousek (Petrosian) variation	306	41.2%	52.0%
D31	QGD, Janowski variation	6	66.7%	33.3%
D31	QGD, semi-Slav	164	36.0%	53.4%
D31	QGD, semi-Slav, Abrahams variation	48	41.7%	45.8%
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	169	40.2%	53.8%
D31	QGD, semi-Slav, Noteboom variation	35	17.1%	42.9%
D32	QGD, Tarrasch defence	134	47.0%	54.1%
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 defence, Tarrasch gambit	1	100.0%	50.0%
D32	QGD, Tarrasch, von Hennig-Schara gambit	7	28.6%	71.4%
D33	QGD, Tarrasch, Folkestone (Swedish) variation	22	50.0%	52.3%
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	67	40.3%	57.5%
D34	QGD, Tarrasch, Prague variation, 9.Bg5	398	47.7%	56.8%
D34	QGD, Tarrasch, Prague variation, Normal position	249	44.6%	54.4%
D34	QGD, Tarrasch, Reti variation	8	75.0%	50.0%
D35	QGD, 3...Nf6	30	33.3%	50.0%
D35	QGD, Harrwitz attack	8	50.0%	50.0%
D35	QGD, exchange variation	54	48.1%	53.7%
D35	QGD, exchange, Saemisch variation	72	54.2%	46.5%
D35	QGD, exchange, positional line	267	37.1%	55.6%
D35	QGD, exchange, positional line, 5...c6	174	40.2%	54.6%
D36	QGD, exchange, positional line, 6.Qc2	48	39.6%	44.8%
D37	QGD, 4.Nf3	1347	42.2%	52.7%
D37	QGD, classical variation (5.Bf4)	1331	41.2%	56.0%
D38	QGD, Ragozin variation	927	43.3%	51.7%
D39	QGD, Ragozin, Vienna variation	717	49.1%	52.2%
D40	QGD, Semi-Tarrasch defence	211	42.7%	53.1%
D40	QGD, Semi-Tarrasch defence, Pillsbury variation	3	0.0%	66.7%
D41	QGD, Semi-Tarrasch with e3	49	40.8%	53.1%
D41	QGD, Semi-Tarrasch, 5.cd	237	42.6%	58.4%
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	119	38.7%	59.7%
D43	QGD semi-Slav	2345	37.1%	53.6%
D43	QGD semi-Slav, Hastings variation	1	0.0%	100.0%
D44	QGD semi-Slav, 5.Bg5 dc	26	42.3%	48.1%
D44	QGD semi-Slav, Botvinnik system (anti-Meran)	33	39.4%	43.9%
D44	QGD semi-Slav, Ekstrom variation	19	47.4%	39.5%
D44	QGD semi-Slav, anti-Meran gambit	421	34.0%	57.4%
D44	QGD semi-Slav, anti-Meran, Lilienthal variation	93	31.2%	64.0%
D44	QGD semi-Slav, anti-Meran, Szabo variation	17	17.6%	38.2%
D45	QGD semi-Slav, 5...Nd7	176	33.5%	46.9%
D45	QGD semi-Slav, 5.e3	187	40.6%	53.5%
D45	QGD semi-Slav, Rubinstein (anti-Meran) system	11	18.2%	36.4%
D45	QGD semi-Slav, Stoltz variation	5805	40.7%	52.9%
D45	QGD semi-Slav, accelerated Meran (Alekhine variation)	465	41.5%	50.4%
D45	QGD semi-Slav, stonewall defence	2	50.0%	75.0%
D46	QGD semi-Slav, 6.Bd3	21	33.3%	54.8%
D46	QGD semi-Slav, Bogolyubov variation	101	42.6%	54.0%
D46	QGD semi-Slav, Chigorin defence	148	41.2%	57.8%
D46	QGD semi-Slav, Romih variation	121	38.0%	63.6%
D47	QGD semi-Slav, 7.Bc4	20	25.0%	52.5%
D47	QGD semi-Slav, Meran variation	412	45.4%	55.9%
D47	QGD semi-Slav, Meran, Wade variation	4713	35.6%	54.2%
D47	QGD semi-Slav, neo-Meran (Lundin variation)	131	38.9%	57.6%
D48	QGD semi-Slav, Meran	9	0.0%	22.2%
D48	QGD semi-Slav, Meran, 8...a6	513	40.5%	49.7%
D48	QGD semi-Slav, Meran, Pirc variation	6	50.0%	58.3%
D48	QGD semi-Slav, Meran, Reynolds' variation	470	37.7%	53.9%
D48	QGD semi-Slav, Meran, old main line	103	35.9%	56.8%
D49	QGD semi-Slav, Meran, Blumenfeld variation	166	46.4%	47.9%
D49	QGD semi-Slav, Meran, Rabinovich variation	54	31.5%	50.9%
D49	QGD semi-Slav, Meran, Rellstab attack	16	37.5%	56.3%
D49	QGD semi-Slav, Meran, Sozin variation	131	42.7%	46.6%
D49	QGD semi-Slav, Meran, Stahlberg variation	75	41.3%	46.0%
D50	QGD, 4.Bg5	26	46.2%	50.0%
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	21	28.6%	52.4%
D51	QGD, 5...c6	23	47.8%	58.7%
D51	QGD, Manhattan variation	3	0.0%	100.0%
D52	QGD	14	42.9%	57.1%
D52	QGD, Cambridge Springs defence	1	100.0%	50.0%
D52	QGD, Cambridge Springs defence, 7.cd	9	66.7%	44.4%
D52	QGD, Cambridge Springs defence, Argentine variation	4	50.0%	25.0%
D52	QGD, Cambridge Springs defence, Bogoljubow variation	181	44.8%	52.8%
D52	QGD, Cambridge Springs defence, Capablanca variation	6	16.7%	58.3%
D52	QGD, Cambridge Springs defence, Rubinstein variation	50	44.0%	50.0%
D52	QGD, Cambridge Springs defence, Yugoslav variation	112	42.9%	53.6%
D53	QGD, 4.Bg5 Be7	107	41.1%	49.5%
D53	QGD, 4.Bg5 Be7, 5.e3 O-O	5	40.0%	60.0%
D53	QGD, Lasker variation	3	33.3%	83.3%
D54	QGD, Anti-neo-orthodox variation	21	38.1%	47.6%
D55	QGD, 6.Nf3	26	30.8%	46.2%
D55	QGD, Neo-orthodox variation	3	0.0%	66.7%
D55	QGD, Neo-orthodox variation, 7.Bh4	50	44.0%	60.0%
D55	QGD, Neo-orthodox variation, 7.Bxf6	98	42.9%	51.0%
D55	QGD, Petrosian variation	282	48.9%	52.8%
D55	QGD, Pillsbury attack	1	100.0%	50.0%
D56	QGD, Lasker defence	140	37.1%	55.0%
D56	QGD, Lasker defence, Teichmann variation	45	46.7%	41.1%
D57	QGD, Lasker defence, Bernstein variation	3	33.3%	83.3%
D57	QGD, Lasker defence, main line	29	62.1%	51.7%
D58	QGD, Tartakower (Makagonov-Bondarevsky) system	3523	44.8%	51.7%
D59	QGD, Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5	111	52.3%	45.0%
D59	QGD, Tartakower variation	59	30.5%	44.1%
D60	QGD, Orthodox defence	29	34.5%	62.1%
D60	QGD, Orthodox defence, Botvinnik variation	36	27.8%	52.8%
D60	QGD, Orthodox defence, Rauzer variation	10	10.0%	85.0%
D61	QGD, Orthodox defence, Rubinstein variation	113	46.0%	50.4%
D62	QGD, Orthodox defence, 7.Qc2 c5, 8.cd (Rubinstein)	82	52.4%	57.9%
D63	QGD, Orthodox defence	23	65.2%	50.0%
D63	QGD, Orthodox defence, 7.Rc1	55	27.3%	57.3%
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	54	38.9%	60.2%
D63	QGD, Orthodox defence, Swiss, Karlsbad variation	114	41.2%	53.9%
D64	QGD, Orthodox defence, Rubinstein attack (with Rc1)	40	50.0%	55.0%
D64	QGD, Orthodox defence, Rubinstein attack, Gruenfeld variation	11	36.4%	45.5%
D64	QGD, Orthodox defence, Rubinstein attack, Karlsbad variation	12	25.0%	37.5%
D64	QGD, Orthodox defence, Rubinstein attack, Wolf variation	10	40.0%	50.0%
D65	QGD, Orthodox defence, Rubinstein attack, main line	3	33.3%	83.3%
D66	QGD, Orthodox defence, Bd3 line	117	37.6%	62.4%
D66	QGD, Orthodox defence, Bd3 line, fianchetto variation	4	25.0%	62.5%
D67	QGD, Orthodox defence, Bd3 line	20	50.0%	45.0%
D67	QGD, Orthodox defence, Bd3 line, 11.O-O	36	27.8%	66.7%
D67	QGD, Orthodox defence, Bd3 line, Alekhine variation	42	45.2%	51.2%
D68	QGD, Orthodox defence, classical variation	64	48.4%	55.5%
D68	QGD, Orthodox defence, classical, 13.d1b1 (Maroczy)	3	66.7%	33.3%
D68	QGD, Orthodox defence, classical, 13.d1c2 (Vidmar)	41	56.1%	57.3%
D69	QGD, Orthodox defence, classical, 13.de	22	59.1%	47.7%
D70	Neo-Gruenfeld (Kemeri) defence	9	22.2%	55.6%
D70	Neo-Gruenfeld defence	27	40.7%	46.3%
D71	Neo-Gruenfeld, 5.cd	62	45.2%	54.8%
D72	Neo-Gruenfeld, 5.cd, main line	58	31.0%	58.6%
D73	Neo-Gruenfeld, 5.Nf3	207	51.2%	54.6%
D74	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O	49	38.8%	54.1%
D75	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3	27	40.7%	57.4%
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	227	39.6%	55.5%
D77	Neo-Gruenfeld, 6.O-O	269	47.6%	56.1%
D78	Neo-Gruenfeld, 6.O-O c6	407	41.0%	55.4%
D79	Neo-Gruenfeld, 6.O-O, main line	159	45.3%	50.3%
D80	Gruenfeld defence	33	36.4%	63.6%
D80	Gruenfeld, Stockholm variation	135	39.3%	58.1%
D81	Gruenfeld, Russian variation	12	58.3%	62.5%
D82	Gruenfeld, 4.Bf4	196	39.8%	56.1%
D83	Gruenfeld, Gruenfeld gambit	9	44.4%	66.7%
D83	Gruenfeld, Gruenfeld gambit, Botvinnik variation	9	77.8%	61.1%
D83	Gruenfeld, Gruenfeld gambit, Capablanca variation	30	46.7%	60.0%
D84	Gruenfeld, Gruenfeld gambit accepted	15	53.3%	53.3%
D85	Gruenfeld, exchange variation	399	43.9%	53.8%
D85	Gruenfeld, modern exchange variation	1547	48.4%	54.4%
D86	Gruenfeld, exchange, Simagin's improved variation	37	35.1%	47.3%
D86	Gruenfeld, exchange, Simagin's lesser variation	9	11.1%	50.0%
D86	Gruenfeld, exchange, classical variation	246	44.7%	56.5%
D87	Gruenfeld, exchange, Seville variation	66	54.5%	62.1%
D87	Gruenfeld, exchange, Spassky variation	155	38.1%	53.9%
D88	Gruenfeld, Spassky variation, main line, 10...cd, 11.cd	55	36.4%	63.6%
D89	Gruenfeld, Spassky variation, main line, 13.Bd3	62	33.9%	49.2%
D89	Gruenfeld, exchange, Sokolsky variation	8	50.0%	25.0%
D90	Gruenfeld, Flohr variation	19	15.8%	60.5%
D90	Gruenfeld, Schlechter variation	8	37.5%	43.8%
D90	Gruenfeld, Three knights variation	93	43.0%	51.6%
D91	Gruenfeld, 5.Bg5	469	36.2%	48.6%
D92	Gruenfeld, 5.Bf4	232	47.8%	56.3%
D93	Gruenfeld with Bf4 e3	95	49.5%	56.3%
D94	Gruenfeld with e3 Bd3	11	45.5%	59.1%
D94	Gruenfeld, 5.e3	168	44.0%	59.5%
D94	Gruenfeld, Flohr defence	12	25.0%	62.5%
D94	Gruenfeld, Makogonov variation	41	46.3%	45.1%
D94	Gruenfeld, Opovcensky variation	45	46.7%	52.2%
D94	Gruenfeld, Smyslov defence	69	56.5%	55.8%
D95	Gruenfeld with e3 & Qb3	4	50.0%	75.0%
D95	Gruenfeld, Botvinnik variation	14	28.6%	42.9%
D96	Gruenfeld, Russian variation	44	38.6%	62.5%
D97	Gruenfeld, Russian variation with e4	6	33.3%	66.7%
D97	Gruenfeld, Russian, Alekhine (Hungarian) variation	645	41.9%	50.7%
D97	Gruenfeld, Russian, Byrne (Simagin) variation	48	33.3%	60.4%
D97	Gruenfeld, Russian, Prins variation	268	39.6%	56.3%
D97	Gruenfeld, Russian, Szabo (Boleslavsky) variation	71	35.2%	54.2%
D98	Gruenfeld, Russian, Keres variation	3	0.0%	100.0%
D98	Gruenfeld, Russian, Smyslov variation	127	44.1%	58.3%
D99	Gruenfeld defence, Smyslov, Yugoslav variation	10	30.0%	45.0%
D99	Gruenfeld defence, Smyslov, main line	105	44.8%	56.7%
E00	Catalan opening	981	37.0%	55.0%
E00	Neo-Indian (Seirawan) attack	114	28.9%	50.4%
E00	Queen's pawn game	186	39.8%	55.4%
E01	Catalan, closed	72	38.9%	56.9%
E02	Catalan, open, 5.Qa4	44	40.9%	61.4%
E03	Catalan, open, 5.Qa4 Nbd7, 6.Qxc4	5	100.0%	50.0%
E04	Catalan, open, 5.Nf3	1156	41.3%	52.0%
E05	Catalan, open, classical line	42	33.3%	52.4%
E06	Catalan, closed, 5.Nf3	1010	45.6%	53.5%
E07	Catalan, closed, 6...Nbd7	33	39.4%	47.0%
E07	Catalan, closed, Botvinnik variation	25	44.0%	42.0%
E08	Catalan, closed, 7.Qc2	29	34.5%	58.6%
E08	Catalan, closed, Qc2 & b3	90	38.9%	52.8%
E08	Catalan, closed, Spassky gambit	1	0.0%	100.0%
E09	Catalan, closed, main line	79	30.4%	63.3%
E10	Blumenfeld counter-gambit	20	25.0%	52.5%
E10	Blumenfeld counter-gambit accepted	25	20.0%	50.0%
E10	Blumenfeld counter-gambit, Dus-Chotimursky variation	50	32.0%	56.0%
E10	Blumenfeld counter-gambit, Spielmann variation	8	0.0%	50.0%
E10	Doery defence	8	25.0%	50.0%
E10	Dzindzikhashvili defence	15	66.7%	66.7%
E10	Queen's pawn game	1130	41.6%	56.8%
E11	Bogo-Indian defence	506	38.5%	55.4%
E11	Bogo-Indian defence, Gruenfeld variation	512	34.8%	54.9%
E11	Bogo-Indian defence, Monticelli trap	10	30.0%	35.0%
E11	Bogo-Indian defence, Nimzovich variation	554	36.5%	56.5%
E12	Queen's Indian defence	124	30.6%	54.0%
E12	Queen's Indian, 4.Nc3	1766	37.3%	52.8%
E12	Queen's Indian, 4.Nc3, Botvinnik variation	12	16.7%	50.0%
E12	Queen's Indian, Miles variation	157	36.9%	52.9%
E12	Queen's Indian, Petrosian system	2458	38.3%	53.2%
E13	Queen's Indian, 4.Nc3, main line	65	30.8%	55.4%
E14	Queen's Indian, 4.e3	677	38.6%	54.1%
E14	Queen's Indian, Averbakh variation	1	0.0%	100.0%
E15	Queen's Indian, 4.g3	285	34.4%	59.6%
E15	Queen's Indian, 4.g3 Bb7	60	35.0%	65.8%
E15	Queen's Indian, Buerger variation	2	100.0%	50.0%
E15	Queen's Indian, Nimzovich variation (exaggerated fianchetto)	8243	36.5%	56.3%
E15	Queen's Indian, Rubinstein variation	26	34.6%	51.9%
E16	Queen's Indian, Capablanca variation	93	43.0%	54.8%
E16	Queen's Indian, Riumin variation	75	34.7%	57.3%
E16	Queen's Indian, Yates variation	108	33.3%	57.4%
E17	Queen's Indian, 5.Bg2 Be7	13	46.2%	46.2%
E17	Queen's Indian, Euwe variation	23	30.4%	63.0%
E17	Queen's Indian, Opovcensky variation	278	39.9%	55.2%
E17	Queen's Indian, anti-Queen's Indian system	57	43.9%	48.2%
E17	Queen's Indian, old main line, 6.O-O	141	41.8%	54.3%
E18	Queen's Indian, old main line, 7.Nc3	867	42.6%	56.9%
E19	Queen's Indian, old main line, 9.Qxc3	562	40.2%	58.4%
E20	Nimzo-Indian defence	16	25.0%	43.8%
E20	Nimzo-Indian, Kmoch variation	134	40.3%	59.7%
E20	Nimzo-Indian, Romanishin-Kasparov (Steiner) system	191	41.9%	50.8%
E21	Nimzo-Indian, three knights variation	644	39.8%	52.5%
E21	Nimzo-Indian, three knights, Korchnoi variation	2	0.0%	50.0%
E22	Nimzo-Indian, Spielmann variation	22	59.1%	47.7%
E23	Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc6	18	38.9%	63.9%
E23	Nimzo-Indian, Spielmann, Karlsbad variation	8	50.0%	50.0%
E23	Nimzo-Indian, Spielmann, San Remo variation	2	50.0%	75.0%
E24	Nimzo-Indian, Saemisch variation	28	50.0%	32.1%
E24	Nimzo-Indian, Saemisch, Botvinnik variation	4	0.0%	0.0%
E25	Nimzo-Indian, Saemisch variation	27	66.7%	51.9%
E25	Nimzo-Indian, Saemisch, Keres variation	94	44.7%	51.1%
E25	Nimzo-Indian, Saemisch, Romanovsky variation	6	66.7%	33.3%
E26	Nimzo-Indian, Saemisch variation	21	28.6%	38.1%
E26	Nimzo-Indian, Saemisch, O'Kelly variation	11	27.3%	40.9%
E27	Nimzo-Indian, Saemisch variation	6	50.0%	41.7%
E28	Nimzo-Indian, Saemisch variation	17	17.6%	55.9%
E29	Nimzo-Indian, Saemisch, Capablanca variation	13	30.8%	30.8%
E29	Nimzo-Indian, Saemisch, main line	36	36.1%	56.9%
E30	Nimzo-Indian, Leningrad variation	207	35.3%	49.5%
E30	Nimzo-Indian, Leningrad, ...b5 gambit	32	31.3%	43.8%
E31	Nimzo-Indian, Leningrad, main line	63	33.3%	54.8%
E32	Nimzo-Indian, classical variation	2470	40.2%	53.9%
E32	Nimzo-Indian, classical, Adorjan gambit	54	35.2%	50.9%
E33	Nimzo-Indian, classical, 4...Nc6	23	56.5%	50.0%
E33	Nimzo-Indian, classical, Milner-Barry (Zurich) variation	111	38.7%	53.6%
E34	Nimzo-Indian, classical, Noa variation	252	51.6%	51.6%
E35	Nimzo-Indian, classical, Noa variation, 5.cd ed	117	40.2%	54.3%
E36	Nimzo-Indian, classical, Botvinnik variation	3	0.0%	66.7%
E36	Nimzo-Indian, classical, Noa variation, 5.a3	27	22.2%	51.9%
E37	Nimzo-Indian, classical, Noa variation, main line, 7.Qc2	45	37.8%	74.4%
E38	Nimzo-Indian, classical, 4...c5	164	39.0%	65.9%
E39	Nimzo-Indian, classical, Pirc variation	277	40.8%	55.1%
E40	Nimzo-Indian, 4.e3	68	29.4%	55.9%
E40	Nimzo-Indian, 4.e3, Taimanov variation	24	29.2%	64.6%
E41	Nimzo-Indian, 4.e3 c5	322	38.2%	54.8%
E41	Nimzo-Indian, e3, Huebner variation	203	36.0%	48.5%
E42	Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein)	286	41.3%	50.3%
E43	Nimzo-Indian, Fischer variation	282	38.7%	54.1%
E44	Nimzo-Indian, Fischer variation, 5.Ne2	115	36.5%	56.5%
E45	Nimzo-Indian, 4.e3, Bronstein (Byrne) variation	84	46.4%	58.9%
E46	Nimzo-Indian, 4.e3 O-O	31	22.6%	56.5%
E46	Nimzo-Indian, Reshevsky variation	148	39.2%	48.6%
E46	Nimzo-Indian, Simagin variation	23	26.1%	56.5%
E47	Nimzo-Indian, 4.e3 O-O, 5.Bd3	120	50.8%	56.3%
E48	Nimzo-Indian, 4.e3 O-O, 5.Bd3 d5	153	42.5%	48.7%
E49	Nimzo-Indian, 4.e3, Botvinnik system	81	43.2%	62.3%
E50	Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d5	37	40.5%	52.7%
E51	Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d5	34	50.0%	54.4%
E51	Nimzo-Indian, 4.e3, Ragozin variation	6	83.3%	58.3%
E52	Nimzo-Indian, 4.e3, main line with ...b6	141	42.6%	57.4%
E53	Nimzo-Indian, 4.e3, Gligoric system with 7...Nbd7	19	52.6%	42.1%
E53	Nimzo-Indian, 4.e3, Keres variation	40	37.5%	53.8%
E53	Nimzo-Indian, 4.e3, main line with ...c5	134	37.3%	59.7%
E54	Nimzo-Indian, 4.e3, Gligoric system with 7...dc	359	46.0%	57.0%
E54	Nimzo-Indian, 4.e3, Gligoric system, Smyslov variation	18	61.1%	58.3%
E55	Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation	1227	46.7%	54.3%
E56	Nimzo-Indian, 4.e3, main line with 7...Nc6	75	48.0%	56.0%
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	613	36.2%	53.2%
E59	Nimzo-Indian, 4.e3, main line	631	41.7%	53.0%
E60	King's Indian defence	152	35.5%	53.9%
E60	King's Indian, 3.Nf3	1276	38.1%	57.2%
E60	King's Indian, 3.g3	313	37.7%	52.1%
E60	King's Indian, 3.g3, counterthrust variation	3	0.0%	33.3%
E60	King's Indian, Anti-Gruenfeld	5	40.0%	40.0%
E60	Queen's pawn, Mengarini attack	11	9.1%	86.4%
E61	King's Indian defence, 3.Nc3	265	36.2%	57.7%
E61	King's Indian, Smyslov system	30	36.7%	41.7%
E62	King's Indian, fianchetto variation	31	32.3%	58.1%
E62	King's Indian, fianchetto with ...Nc6	65	35.4%	57.7%
E62	King's Indian, fianchetto, Kavalek (Bronstein) variation	314	33.1%	60.5%
E62	King's Indian, fianchetto, Larsen system	160	39.4%	60.9%
E62	King's Indian, fianchetto, Simagin variation	48	39.6%	61.5%
E62	King's Indian, fianchetto, Uhlmann (Szabo) variation	139	30.9%	59.4%
E62	King's Indian, fianchetto, lesser Simagin (Spassky) variation	83	43.4%	57.8%
E63	King's Indian, fianchetto, Panno variation	1278	36.0%	57.6%
E64	King's Indian, fianchetto, Yugoslav system	45	28.9%	61.1%
E65	King's Indian, fianchetto, Yugoslav, 7.O-O	57	56.1%	52.6%
E66	King's Indian, fianchetto, Yugoslav Panno	119	32.8%	56.7%
E67	King's Indian, fianchetto with ...Nd7	45	42.2%	52.2%
E67	King's Indian, fianchetto, classical variation	198	35.4%	57.6%
E68	King's Indian, fianchetto, classical variation, 8.e4	715	37.3%	59.2%
E69	King's Indian, fianchetto, classical main line	340	31.2%	61.8%
E70	King's Indian, 4.e4	256	25.8%	59.8%
E70	King's Indian, Kramer system	117	21.4%	58.5%
E70	King's Indian, accelerated Averbakh system	35	25.7%	55.7%
E71	King's Indian, Makagonov system (5.h3)	186	26.3%	63.2%
E72	King's Indian with e4 & g3	11	45.5%	59.1%
E72	King's Indian, Pomar system	4	50.0%	50.0%
E73	King's Indian, 5.Be2	11	54.5%	54.5%
E73	King's Indian, Averbakh system	301	27.6%	53.7%
E73	King's Indian, Semi-Averbakh system	10	30.0%	55.0%
E74	King's Indian, Averbakh, 6...c5	41	39.0%	53.7%
E75	King's Indian, Averbakh, main line	26	11.5%	51.9%
E76	King's Indian, Four pawns attack	69	36.2%	58.7%
E76	King's Indian, Four pawns attack, dynamic line	37	32.4%	56.8%
E77	King's Indian, Four pawns attack	42	19.0%	61.9%
E77	King's Indian, Four pawns attack, 6.Be2	1	0.0%	0.0%
E77	King's Indian, Four pawns attack, Florentine gambit	2	100.0%	50.0%
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	82	35.4%	61.6%
E81	King's Indian, Saemisch, 5...O-O	607	34.3%	53.4%
E81	King's Indian, Saemisch, Byrne variation	41	48.8%	51.2%
E82	King's Indian, Saemisch, double fianchetto variation	29	27.6%	58.6%
E83	King's Indian, Saemisch, 6...Nc6	20	30.0%	55.0%
E83	King's Indian, Saemisch, Panno formation	23	39.1%	50.0%
E83	King's Indian, Saemisch, Ruban variation	4	25.0%	62.5%
E84	King's Indian, Saemisch, Panno main line	163	36.2%	51.8%
E85	King's Indian, Saemisch, orthodox variation	4	25.0%	37.5%
E86	King's Indian, Saemisch, orthodox, 7.Nge2 c6	147	29.9%	51.7%
E87	King's Indian, Saemisch, orthodox, 7.d5	80	27.5%	56.3%
E87	King's Indian, Saemisch, orthodox, Bronstein variation	2	50.0%	25.0%
E88	King's Indian, Saemisch, orthodox, 7.d5 c6	140	32.9%	54.3%
E89	King's Indian, Saemisch, orthodox main line	14	42.9%	50.0%
E90	King's Indian, 5.Nf3	241	31.1%	57.1%
E90	King's Indian, Larsen variation	41	39.0%	51.2%
E90	King's Indian, Zinnowitz variation	17	29.4%	55.9%
E91	King's Indian, 6.Be2	255	32.2%	65.1%
E91	King's Indian, Kazakh variation	147	35.4%	55.8%
E92	King's Indian, Andersson variation	120	45.8%	48.8%
E92	King's Indian, Gligoric-Taimanov system	561	30.5%	57.5%
E92	King's Indian, Petrosian system	36	13.9%	54.2%
E92	King's Indian, Petrosian system, Stein variation	299	31.1%	53.7%
E92	King's Indian, classical variation	11	36.4%	54.5%
E93	King's Indian, Petrosian system, main line	40	40.0%	55.0%
E94	King's Indian, orthodox variation	430	37.7%	54.9%
E94	King's Indian, orthodox, 7...Nbd7	485	35.1%	60.0%
E94	King's Indian, orthodox, Donner variation	45	26.7%	57.8%
E95	King's Indian, orthodox, 7...Nbd7, 8.Re1	199	36.2%	55.3%
E96	King's Indian, orthodox, 7...Nbd7, main line	36	38.9%	58.3%
E97	King's Indian, orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)	2048	33.2%	55.2%
E97	King's Indian, orthodox, Aronin-Taimanov, bayonet attack	952	33.8%	58.9%
E98	King's Indian, orthodox, Aronin-Taimanov, 9.Ne1	663	25.3%	60.6%
E99	King's Indian, orthodox, Aronin-Taimanov, Benko attack	18	16.7%	63.9%
E99	King's Indian, orthodox, Aronin-Taimanov, main line	11	18.2%	54.5%