CCRL 40/4

Opening statistics

This page shows how many games in our database were played from various openings classified by the Encyclopedia of Chess Openings. The table also shows average draw percentage and white score we observed in our games.

ECO		Number of games	Draws	White score	Bare PGN
A00	Irregular Openings	501	33.9%	50.9%	0.12 MB
A01	Nimzovich-Larsen attack	157	36.9%	51.0%	0.04 MB
A03	Bird's Opening	4	75.0%	37.5%	0.00 MB
A04	Reti Opening	2022	30.2%	53.4%	0.41 MB
A05	Reti Opening, 2..Nf6	1833	34.1%	54.1%	0.38 MB
A06	Reti Opening, 2..d5	640	30.5%	52.4%	0.14 MB
A07	Reti Opening, King's Indian attack (Barcza system)	2372	33.3%	52.8%	0.51 MB
A08	Reti Opening, King's Indian attack	300	33.0%	57.8%	0.07 MB
A09	Reti Opening, 2..d5 3.c4	366	28.4%	52.7%	0.08 MB
A10	English Opening	966	33.4%	53.5%	0.20 MB
A11	English, Caro-Kann defensive system	210	30.0%	53.1%	0.05 MB
A12	English, Caro-Kann defensive system	112	31.3%	59.4%	0.03 MB
A13	English Opening	1711	32.8%	54.1%	0.37 MB
A14	English, Neo-Catalan declined	430	39.1%	54.7%	0.10 MB
A15	English, 1...Nf6 (Anglo-Indian defense)	2070	32.8%	54.5%	0.45 MB
A16	English Opening	227	33.5%	55.5%	0.05 MB
A17	English Opening	376	31.4%	54.5%	0.09 MB
A18	English, Mikenas-Carls variation	14	28.6%	64.3%	0.01 MB
A19	English, Mikenas-Carls, Sicilian variation	36	30.6%	59.7%	0.01 MB
A20	English Opening	2213	33.8%	54.7%	0.44 MB
A21	English Opening	920	31.0%	52.4%	0.19 MB
A22	English Opening	1148	33.4%	51.0%	0.24 MB
A23	English Opening, Bremen system, Keres variation	94	35.1%	52.7%	0.02 MB
A24	English Opening, Bremen system with 3...g6	10	0.0%	80.0%	0.00 MB
A25	English Opening, Sicilian Reversed	864	31.6%	54.9%	0.18 MB
A26	English Opening, Closed system	240	32.9%	55.2%	0.05 MB
A27	English Opening, Three knights system	76	31.6%	60.5%	0.02 MB
A28	English Opening, Four knights system	1091	36.8%	53.3%	0.24 MB
A29	English Opening, Four knights, kingside Fianchetto	3646	34.2%	51.2%	0.74 MB
A30	English Opening, Symmetrical variation	3142	33.7%	54.6%	0.66 MB
A31	English Opening, Symmetrical, Benoni formation	292	34.9%	51.0%	0.07 MB
A32	English Opening, Symmetrical	69	37.7%	49.3%	0.02 MB
A33	English Opening, Symmetrical	799	31.9%	53.5%	0.17 MB
A34	English Opening, Symmetrical	708	33.6%	51.4%	0.16 MB
A35	English Opening, Symmetrical	776	34.7%	53.5%	0.17 MB
A36	English Opening, Symmetrical	351	31.6%	55.4%	0.08 MB
A37	English Opening, Symmetrical	310	31.9%	54.0%	0.07 MB
A38	English Opening, Symmetrical	204	37.3%	51.5%	0.05 MB
A39	English Opening, Symmetrical, Main line with d4	150	34.7%	51.3%	0.03 MB
A40	Queen's pawn	2711	32.0%	54.9%	0.57 MB
A41	Queen's pawn	886	29.5%	55.0%	0.19 MB
A42	Modern defense, Averbakh system	316	28.2%	61.6%	0.07 MB
A43	Old Benoni defense	462	31.8%	59.8%	0.10 MB
A44	Old Benoni defence	5	40.0%	40.0%	0.00 MB
A45	Queen's pawn game	1549	30.0%	51.4%	0.33 MB
A46	Queen's pawn game	1456	30.6%	54.3%	0.31 MB
A47	Queen's Indian defense	266	28.9%	51.3%	0.06 MB
A48	King's Indian, East Indian defense	998	32.8%	49.9%	0.22 MB
A49	King's Indian, Fianchetto without c4	372	31.7%	51.1%	0.09 MB
A50	Queen's pawn game	325	27.1%	54.5%	0.07 MB
A51	Budapest defense declined	3	0.0%	66.7%	0.00 MB
A52	Budapest defense	16	37.5%	75.0%	0.00 MB
A53	Old Indian defense	432	31.3%	58.9%	0.09 MB
A54	Old Indian, Ukrainian variation	64	18.8%	59.4%	0.02 MB
A55	Old Indian, Main line	174	27.0%	61.2%	0.04 MB
A56	Benoni defense	797	26.5%	63.0%	0.16 MB
A57	Benko gambit	836	30.4%	57.8%	0.17 MB
A58	Benko gambit accepted	728	27.1%	58.0%	0.14 MB
A59	Benko gambit, 7.e4	387	33.9%	57.5%	0.08 MB
A60	Benoni defense	58	36.2%	45.7%	0.01 MB
A61	Benoni defense	627	27.8%	59.6%	0.12 MB
A62	Benoni, Fianchetto variation	172	26.7%	58.7%	0.04 MB
A63	Benoni, Fianchetto variation, 9...Nbd7	26	46.2%	57.7%	0.01 MB
A64	Benoni, Fianchetto variation, 11...Re8	109	28.4%	52.8%	0.02 MB
A65	Benoni, 6.e4	35	28.6%	54.3%	0.01 MB
A66	Benoni, pawn storm variation	2	50.0%	25.0%	0.00 MB
A67	Benoni, Taimanov variation	30	30.0%	58.3%	0.01 MB
A68	Benoni, Four pawns attack	3	0.0%	66.7%	0.00 MB
A69	Benoni, Four pawns attack, Main line	36	27.8%	33.3%	0.01 MB
A70	Benoni, Classical with e4 and Nf3	499	30.1%	60.1%	0.11 MB
A71	Benoni, Classical, 8.Bg5	58	22.4%	56.0%	0.01 MB
A72	Benoni, Classical without 9.O-O	47	25.5%	63.8%	0.01 MB
A73	Benoni, Classical, 9.O-O	15	26.7%	46.7%	0.00 MB
A74	Benoni, Classical, 9...a6, 10.a4	5	20.0%	90.0%	0.00 MB
A75	Benoni, Classical with ...a6 and 10...Bg4	43	32.6%	51.2%	0.01 MB
A76	Benoni, Classical, 9...Re8	24	25.0%	58.3%	0.01 MB
A77	Benoni, Classical, 9...Re8, 10.Nd2	109	25.7%	47.7%	0.02 MB
A78	Benoni, Classical with ...Re8 and ...Na6	31	29.0%	62.9%	0.01 MB
A79	Benoni, Classical, 11.f3	81	17.3%	69.1%	0.02 MB
A80	Dutch	511	31.9%	53.7%	0.11 MB
A81	Dutch defense	848	32.4%	61.7%	0.18 MB
A82	Dutch, Staunton gambit	3	0.0%	100.0%	0.00 MB
A83	Dutch, Staunton gambit, Staunton's line	13	38.5%	73.1%	0.00 MB
A84	Dutch defense	355	27.6%	59.7%	0.08 MB
A85	Dutch with 2.c4 & 3.Nc3	49	36.7%	63.3%	0.01 MB
A86	Dutch with 2.c4 & 3.g3	34	38.2%	60.3%	0.01 MB
A87	Dutch, Leningrad, Main variation	131	29.8%	56.1%	0.03 MB
A88	Dutch, Leningrad, Main variation with 7...c6	197	35.0%	57.6%	0.05 MB
A89	Dutch, Leningrad, Main variation with Nc6	148	29.7%	58.1%	0.03 MB
A90	Dutch defense	419	23.6%	61.0%	0.09 MB
A91	Dutch defense	22	22.7%	61.4%	0.01 MB
A92	Dutch defense	45	31.1%	60.0%	0.01 MB
A93	Dutch, Stonewall, Botwinnik variation	31	29.0%	59.7%	0.01 MB
A94	Dutch, Stonewall with Ba3	18	38.9%	47.2%	0.01 MB
A95	Dutch, Stonewall with Nc3	50	24.0%	54.0%	0.01 MB
A96	Dutch, Classical variation	63	17.5%	69.0%	0.02 MB
A97	Dutch, Ilyin-Genevsky variation	25	28.0%	50.0%	0.01 MB
A98	Dutch, Ilyin-Genevsky variation with Qc2	13	38.5%	57.7%	0.00 MB
A99	Dutch, Ilyin-Genevsky variation with b3	52	23.1%	69.2%	0.01 MB
B00	King's pawn Opening	304	30.6%	60.4%	0.07 MB
B01	Scandinavian (centercounter) center defense	857	34.1%	57.6%	0.18 MB
B02	Alekhine's defense	92	40.2%	54.9%	0.02 MB
B03	Alekhine's defense	268	33.6%	59.0%	0.05 MB
B04	Alekhine's defense, Modern variation	536	31.5%	61.3%	0.12 MB
B05	Alekhine's defense, Modern variation, 4...Bg4	217	34.1%	62.7%	0.05 MB
B06	Robatsch (Modern) defense	2264	31.9%	57.8%	0.47 MB
B07	Pirc defense	944	31.6%	56.7%	0.20 MB
B08	Pirc, Classical (Two knights) system	848	35.3%	56.5%	0.19 MB
B09	Pirc, Austrian attack	631	36.8%	60.1%	0.13 MB
B10	Caro-Kann defense	1649	32.4%	52.9%	0.34 MB
B11	Caro-Kann, Two knights, 3...Bg4	118	31.4%	49.6%	0.03 MB
B12	Caro-Kann defense	2235	30.7%	55.7%	0.46 MB
B13	Caro-Kann, Exchange variation	422	33.4%	54.4%	0.09 MB
B14	Caro-Kann, Panov-Botvinnik attack, 5...e6	974	38.0%	54.5%	0.21 MB
B15	Caro-Kann defense	262	35.1%	51.5%	0.06 MB
B16	Caro-Kann, Bronstein-Larsen variation	85	22.4%	67.6%	0.02 MB
B17	Caro-Kann, Steinitz variation	1486	32.8%	53.2%	0.32 MB
B18	Caro-Kann, Classical variation	397	30.0%	55.3%	0.08 MB
B19	Caro-Kann, Classical, 7...Nd7	2191	30.2%	58.6%	0.43 MB
B20	Sicilian defense	852	28.8%	50.2%	0.18 MB
B21	Sicilian, Grand Prix attack	274	32.5%	53.5%	0.06 MB
B22	Sicilian, Alapin's variation (2.c3)	2105	38.3%	54.1%	0.43 MB
B23	Sicilian, Closed	1143	31.1%	52.3%	0.24 MB
B24	Sicilian, Closed	141	25.5%	46.1%	0.03 MB
B25	Sicilian, Closed	168	28.0%	50.9%	0.04 MB
B26	Sicilian, Closed, 6.Be3	137	27.0%	47.1%	0.03 MB
B27	Sicilian defense	2174	33.5%	55.7%	0.45 MB
B28	Sicilian, O'Kelly variation	59	42.4%	55.1%	0.01 MB
B29	Sicilian, Nimzovich-Rubinstein variation	44	34.1%	60.2%	0.01 MB
B30	Sicilian defense	2470	30.9%	53.2%	0.50 MB
B31	Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6)	1651	31.8%	52.8%	0.34 MB
B32	Sicilian defense	1006	33.4%	53.2%	0.21 MB
B33	Sicilian defense	5267	28.6%	54.1%	0.93 MB
B34	Sicilian, Accelerated Fianchetto, Exchange variation	140	37.9%	55.4%	0.04 MB
B35	Sicilian, Accelerated Fianchetto, Modern variation with Bc4	914	36.5%	51.4%	0.19 MB
B36	Sicilian, Accelerated Fianchetto, Maroczy bind	400	35.5%	57.3%	0.09 MB
B37	Sicilian, Accelerated Fianchetto, Maroczy bind, 5...Bg7	48	39.6%	46.9%	0.01 MB
B38	Sicilian, Accelerated Fianchetto, Maroczy bind, 6.Be3	778	40.1%	57.2%	0.16 MB
B39	Sicilian, Accelerated Fianchetto, Breyer variation	374	32.4%	61.4%	0.08 MB
B40	Sicilian defense	2603	32.0%	53.1%	0.54 MB
B41	Sicilian, Kan variation	235	32.3%	49.4%	0.06 MB
B42	Sicilian, Kan, 5.Bd3	4780	29.0%	55.8%	0.92 MB
B43	Sicilian, Kan, 5.Nc3	2350	31.3%	52.3%	0.46 MB
B44	Sicilian defense	840	31.3%	49.3%	0.18 MB
B45	Sicilian, Taimanov variation	851	30.1%	55.6%	0.17 MB
B46	Sicilian, Taimanov variation	2339	33.1%	54.5%	0.47 MB
B47	Sicilian, Taimanov (Bastrikov) variation	5612	32.9%	54.3%	1.07 MB
B48	Sicilian, Taimanov variation	2148	32.2%	49.7%	0.41 MB
B49	Sicilian, Taimanov variation	623	34.3%	53.9%	0.13 MB
B50	Sicilian	903	31.9%	50.8%	0.20 MB
B51	Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack	555	31.9%	53.1%	0.12 MB
B52	Sicilian, Canal-Sokolsky attack, 3...Bd7	716	36.7%	52.9%	0.16 MB
B53	Sicilian, Chekhover variation	204	39.7%	49.3%	0.05 MB
B54	Sicilian	744	30.8%	54.5%	0.16 MB
B55	Sicilian, Prins variation, Venice attack	20	25.0%	57.5%	0.01 MB
B56	Sicilian	992	30.4%	54.9%	0.21 MB
B57	Sicilian, Sozin (not Scheveningen)	1840	33.7%	49.7%	0.37 MB
B58	Sicilian, Classical	644	33.2%	49.5%	0.14 MB
B59	Sicilian, Boleslavsky variation, 7.Nb3	56	42.9%	51.8%	0.01 MB
B60	Sicilian, Richter-Rauzer	211	30.3%	53.6%	0.05 MB
B61	Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2	257	28.4%	61.3%	0.06 MB
B62	Sicilian, Richter-Rauzer, 6...e6	120	25.0%	44.2%	0.03 MB
B63	Sicilian, Richter-Rauzer, Rauzer attack	920	26.1%	53.3%	0.18 MB
B64	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f4	577	30.5%	54.6%	0.10 MB
B65	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4	914	31.1%	52.6%	0.15 MB
B66	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6	10922	26.7%	51.0%	1.89 MB
B67	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd7	5077	25.5%	52.6%	0.85 MB
B68	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7	114	24.6%	47.4%	0.02 MB
B69	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf6	672	23.2%	56.3%	0.12 MB
B70	Sicilian, Dragon variation	256	31.3%	46.9%	0.06 MB
B71	Sicilian, Dragon, Levenfish variation	19	42.1%	47.4%	0.01 MB
B72	Sicilian, Dragon, 6.Be3	47	21.3%	59.6%	0.01 MB
B73	Sicilian, Dragon, Classical, 8.O-O	80	37.5%	51.3%	0.02 MB
B74	Sicilian, Dragon, Classical, 9.Nb3	211	31.3%	58.3%	0.05 MB
B75	Sicilian, Dragon, Yugoslav attack	87	33.3%	60.3%	0.02 MB
B76	Sicilian, Dragon, Yugoslav attack, 7...O-O	775	27.7%	55.0%	0.14 MB
B77	Sicilian, Dragon, Yugoslav attack, 9.Bc4	344	26.5%	57.1%	0.07 MB
B78	Sicilian, Dragon, Yugoslav attack, 10.O-O-O	575	24.0%	51.5%	0.10 MB
B79	Sicilian, Dragon, Yugoslav attack, 12.h4	53	32.1%	57.5%	0.01 MB
B80	Sicilian, Scheveningen variation	1242	25.8%	53.7%	0.23 MB
B81	Sicilian, Scheveningen, Keres attack	2886	26.3%	59.4%	0.51 MB
B82	Sicilian, Scheveningen, 6.f4	530	28.5%	56.5%	0.10 MB
B83	Sicilian, Scheveningen, 6.Be2	1166	32.8%	51.0%	0.24 MB
B84	Sicilian, Scheveningen (Paulsen), Classical variation	4157	30.3%	52.0%	0.80 MB
B85	Sicilian, Scheveningen, Classical variation with ...Qc7 and ...Nc6	650	36.0%	51.7%	0.13 MB
B86	Sicilian, Sozin attack	84	20.2%	45.8%	0.02 MB
B87	Sozin with ...a6 and ...b5	1112	30.2%	48.9%	0.23 MB
B88	Sicilian, Sozin, Leonhardt variation	234	33.8%	53.2%	0.05 MB
B89	Sicilian, Sozin, 7.Be3	2233	25.4%	50.3%	0.39 MB
B90	Sicilian, Najdorf	14739	25.0%	53.1%	2.52 MB
B91	Sicilian, Najdorf, Zagreb (Fianchetto) variation	266	28.6%	50.0%	0.06 MB
B92	Sicilian, Najdorf, Zagreb (Fianchetto) variation	3717	32.9%	53.2%	0.74 MB
B93	Sicilian, Najdorf, 6.f4	1468	30.2%	50.2%	0.29 MB
B94	Sicilian, Najdorf, 6.Bg5	83	25.3%	44.0%	0.02 MB
B95	Sicilian, Najdorf, 6...e6	96	26.0%	42.2%	0.02 MB
B96	Sicilian, Najdorf, 7.f4	342	31.0%	52.9%	0.07 MB
B97	Sicilian, Najdorf, 7...Qb6	2901	31.3%	45.6%	0.49 MB
B98	Sicilian, Najdorf, 7...Be7	142	30.3%	53.2%	0.03 MB
B99	Sicilian, Najdorf, 7...Be7 Main line	1858	19.7%	55.3%	0.28 MB
C00	French defense	1953	33.6%	52.1%	0.41 MB
C01	French, Exchange variation	528	34.8%	54.4%	0.12 MB
C02	French, Advance variation	1593	26.3%	53.7%	0.32 MB
C03	French, Tarrasch	620	34.4%	54.6%	0.14 MB
C04	French, Tarrasch, Guimard Main line	79	21.5%	50.0%	0.02 MB
C05	French, Tarrasch, Closed variation	588	27.0%	58.1%	0.12 MB
C06	French, Tarrasch, Closed variation, Main line	1442	33.6%	57.4%	0.27 MB
C07	French, Tarrasch, Open variation	1483	37.8%	52.2%	0.32 MB
C08	French, Tarrasch, Open, 4.exd5 exd5	790	40.4%	53.6%	0.18 MB
C09	French, Tarrasch, Open variation, Main line	1123	40.9%	56.1%	0.24 MB
C10	French, Paulsen variation	757	33.6%	56.0%	0.16 MB
C11	French defense	4146	31.7%	53.5%	0.82 MB
C12	French, MacCutcheon variation	528	29.4%	54.3%	0.11 MB
C13	French, Classical	89	32.6%	62.4%	0.02 MB
C14	French, Classical variation	306	28.8%	59.2%	0.07 MB
C15	French, Winawer (Nimzovich) variation	386	32.1%	55.7%	0.08 MB
C16	French, Winawer, Advance variation	290	21.4%	53.4%	0.06 MB
C17	French, Winawer, Advance variation	337	28.2%	56.5%	0.07 MB
C18	French, Winawer, Advance variation	229	21.4%	62.7%	0.05 MB
C19	French, Winawer, Advance, 6...Ne7	4771	27.6%	59.6%	0.93 MB
C20	King's pawn game	5	40.0%	40.0%	0.00 MB
C21	center game	130	46.2%	65.4%	0.03 MB
C22	center game	134	19.4%	63.4%	0.02 MB
C23	Bishop's Opening	87	34.5%	59.8%	0.02 MB
C24	Bishop's Opening, Berlin defense	140	32.1%	56.8%	0.03 MB
C25	Vienna game	211	34.1%	48.3%	0.05 MB
C26	Vienna, Falkbeer variation	87	37.9%	60.3%	0.02 MB
C27	Vienna game	12	50.0%	25.0%	0.00 MB
C28	Vienna game	48	41.7%	54.2%	0.01 MB
C29	Vienna gambit, Kaufmann variation	21	19.0%	76.2%	0.01 MB
C30	King's gambit	24	12.5%	64.6%	0.01 MB
C31	KGD, Falkbeer counter-gambit	6	0.0%	66.7%	0.00 MB
C32	KGD, Falkbeer, 5. dxe4	2	0.0%	50.0%	0.00 MB
C33	King's gambit accepted	12	16.7%	50.0%	0.00 MB
C34	King's knight's gambit	48	20.8%	50.0%	0.01 MB
C35	KGA, Cunningham defense	2	0.0%	0.0%	0.00 MB
C36	KGA, Abbazia defense (Classical defense, Modern defense)	17	35.3%	70.6%	0.00 MB
C37	KGA, Quaade gambit	1	0.0%	0.0%	0.00 MB
C38	King's knight's gambit	2	0.0%	0.0%	0.00 MB
C39	King's knight's gambit	23	30.4%	32.6%	0.01 MB
C40	King's knight Opening	78	26.9%	62.2%	0.02 MB
C41	Philidor's defense	386	34.7%	53.1%	0.09 MB
C42	Petrov's defense	2815	35.0%	56.6%	0.58 MB
C43	Petrov, Modern (Steinitz) attack	547	33.5%	53.3%	0.11 MB
C44	King's pawn game	190	32.1%	50.3%	0.04 MB
C45	Scotch game	672	36.6%	53.0%	0.14 MB
C46	Three knights game	261	31.8%	50.4%	0.06 MB
C47	Four knights, Scotch variation	234	44.0%	50.6%	0.06 MB
C48	Four knights, Spanish variation	469	33.0%	55.1%	0.10 MB
C49	Four knights, double Ruy Lopez	362	33.4%	53.7%	0.09 MB
C50	King's pawn game	567	33.3%	54.9%	0.12 MB
C51	Evans gambit declined	88	28.4%	44.9%	0.02 MB
C52	Evans gambit	19	15.8%	44.7%	0.01 MB
C53	Giuoco piano	487	32.9%	49.3%	0.11 MB
C54	Guioco piano	6	50.0%	41.7%	0.00 MB
C55	Two knights defense	356	33.4%	51.5%	0.08 MB
C56	Two knights defense	11	27.3%	50.0%	0.00 MB
C57	Two knights defense	45	33.3%	61.1%	0.01 MB
C58	Two knights defense	26	42.3%	51.9%	0.01 MB
C59	Two knights defense	46	39.1%	52.2%	0.01 MB
C60	Ruy Lopez	94	38.3%	56.4%	0.02 MB
C61	Ruy Lopez, Bird's defense	21	42.9%	64.3%	0.01 MB
C62	Ruy Lopez, Old Steinitz defence	357	28.0%	53.5%	0.08 MB
C63	Ruy Lopez, Schilemann defense	59	35.6%	53.4%	0.01 MB
C64	Ruy Lopez, Classical (Cordel) defence	450	29.3%	51.1%	0.10 MB
C65	Ruy Lopez, Berlin defense	437	35.5%	50.9%	0.10 MB
C66	Ruy Lopez, Berlin defence, 4.O-O, d6	142	31.7%	52.5%	0.03 MB
C67	Ruy Lopez, Berlin defence, Open variation	912	38.9%	54.0%	0.19 MB
C68	Ruy Lopez, Exchange variation	94	37.2%	46.3%	0.02 MB
C69	Ruy Lopez, Exchange variation, 5.O-O	507	36.1%	53.2%	0.11 MB
C70	Ruy Lopez,	242	30.6%	55.8%	0.05 MB
C71	Ruy Lopez, Modern Steinitz defense	128	39.8%	55.9%	0.03 MB
C72	Ruy Lopez, Modern Steinitz defense 5.0-0	172	33.7%	59.3%	0.04 MB
C73	Ruy Lopez, Modern Steinitz defense, Richter variation	121	34.7%	50.4%	0.03 MB
C74	Ruy Lopez, Modern Steinitz defense	71	39.4%	50.7%	0.02 MB
C75	Ruy Lopez, Modern Steinitz defense	94	33.0%	59.0%	0.02 MB
C76	Ruy Lopez, Modern Steinitz defense, Fianchetto (Bronstein) variation	127	27.6%	49.2%	0.03 MB
C77	Ruy Lopez, Morphy defence	884	32.1%	51.4%	0.21 MB
C78	Ruy Lopez, 5.O-O	1025	31.3%	55.3%	0.22 MB
C79	Ruy Lopez, Steinitz defense deferred (Russian defence)	105	24.8%	55.2%	0.02 MB
C80	Ruy Lopez, Open (Tarrasch) defence	729	36.5%	55.0%	0.14 MB
C81	Ruy Lopez, Open, Howell attack	41	39.0%	70.7%	0.01 MB
C82	Ruy Lopez, Open, 9.c3	130	34.6%	60.4%	0.03 MB
C83	Ruy Lopez, Open, Classical defence	32	43.8%	75.0%	0.01 MB
C84	Ruy Lopez, Closed defense	406	36.0%	51.0%	0.09 MB
C85	Ruy Lopez, Exchange variation doubly deferred (DERLD)	378	36.8%	52.5%	0.08 MB
C86	Worrall attack	143	32.9%	48.6%	0.04 MB
C87	Ruy Lopez, Closed, Averbach variation	84	34.5%	56.5%	0.02 MB
C88	Ruy Lopez, Closed	1087	33.5%	51.4%	0.23 MB
C89	Ruy Lopez, Marshall counter-attack	228	38.2%	48.9%	0.05 MB
C90	Ruy Lopez, closed (with ...d6)	2097	29.6%	52.3%	0.47 MB
C91	Ruy Lopez, closed, 9.d4	3781	31.3%	53.2%	0.80 MB
C92	Ruy Lopez, closed, 9.d4	2750	33.5%	54.0%	0.54 MB
C93	Ruy Lopez, closed, Smyslov defense	122	27.9%	62.3%	0.03 MB
C94	Ruy Lopez, Closed, Breyer defense	23	56.5%	54.3%	0.01 MB
C95	Ruy Lopez, closed, Breyer, 10.d4	1381	30.8%	58.4%	0.28 MB
C96	Ruy Lopez, closed, 8...Na5	657	32.6%	60.6%	0.15 MB
C97	Ruy Lopez, Closed, Chigorin defense	578	24.0%	63.1%	0.12 MB
C98	Ruy Lopez, Closed, Chigorin, 12...Nc6	165	21.2%	60.3%	0.04 MB
C99	Ruy Lopez, Closed, Chigorin, 12...c5d4	2474	36.1%	59.0%	0.46 MB
D00	Queen's pawn game	592	31.1%	52.7%	0.13 MB
D01	Richter-Veresov attack	81	35.8%	41.4%	0.02 MB
D02	Queen's pawn game, 2. Nf3	2832	30.3%	52.9%	0.60 MB
D03	Torre attack, Tartakower variation	114	30.7%	53.1%	0.03 MB
D04	Queen's pawn game	242	33.9%	52.5%	0.06 MB
D05	Queen's pawn game, Zukertort variation	171	33.9%	51.5%	0.04 MB
D06	Queen's Gambit	134	34.3%	60.4%	0.03 MB
D07	QGD; Chigorin defense	576	30.2%	57.8%	0.11 MB
D08	QGD; Albin counter-gambit	2	0.0%	50.0%	0.00 MB
D09	QGD; Albin counter-gambit, 5.g3	6	50.0%	41.7%	0.00 MB
D10	QGD; Slav defense	1433	31.1%	51.2%	0.31 MB
D11	QGD; Slav defense, 3.Nf3	975	32.7%	52.6%	0.21 MB
D12	QGD; Slav defense, 4.e3 Bf5	1065	34.4%	55.5%	0.23 MB
D13	QGD; Slav defense, Exchange variation	201	35.3%	54.0%	0.05 MB
D14	QGD; Slav defense, Exchange variation	136	33.1%	52.6%	0.03 MB
D15	QGD; Slav accepted, Exchange variation, 6.Bf4 Bf5	836	35.0%	53.2%	0.18 MB
D16	QGD; Slav accepted, Alapin variation	158	38.0%	57.6%	0.04 MB
D17	QGD; Slav defense, Czech defence	842	33.6%	57.5%	0.17 MB
D18	QGD; Dutch variation	23	30.4%	58.7%	0.01 MB
D19	QGD; Dutch variation	1158	34.1%	56.3%	0.24 MB
D20	Queen's Gambit accepted	1112	32.2%	54.8%	0.24 MB
D21	QGA, 3.Nf3	119	38.7%	47.9%	0.03 MB
D22	QGA; Alekhine defense	44	38.6%	62.5%	0.01 MB
D23	Queen's gambit accepted	66	30.3%	42.4%	0.02 MB
D24	QGA, 4.Nc3	92	33.7%	60.3%	0.02 MB
D25	QGA, 4.e3	160	33.1%	59.1%	0.04 MB
D26	QGA; classical variation	390	42.3%	54.2%	0.09 MB
D27	QGA; classical variation	2052	38.0%	55.0%	0.43 MB
D28	QGA; Classical variation 7.Qe2	50	50.0%	45.0%	0.01 MB
D29	QGA; Classical variation 8...Bb7	207	32.9%	43.0%	0.04 MB
D30	QGD	2007	31.7%	54.3%	0.42 MB
D31	QGD, 3.Nc3	902	31.4%	54.2%	0.18 MB
D32	QGD; Tarrasch defense	89	33.7%	59.6%	0.02 MB
D33	QGD; Tarrasch, Schlechter-Rubinstein system	37	43.2%	54.1%	0.01 MB
D34	QGD; Tarrasch, 7...Be7	637	36.6%	61.5%	0.14 MB
D35	QGD; 3...Nf6	743	31.0%	54.6%	0.16 MB
D36	QGD; Exchange, positional line, 6.Qc2	34	38.2%	63.2%	0.01 MB
D37	QGD; 4.Nf3	3017	34.3%	53.2%	0.62 MB
D38	QGD; Ragozin variation	1131	36.1%	53.8%	0.24 MB
D39	QGD; Ragozin, Vienna variation	313	39.3%	56.4%	0.06 MB
D40	QGD; Semi-Tarrasch defense	243	35.8%	47.9%	0.06 MB
D41	QGD; Semi-Tarrasch, 5.cd	245	37.1%	56.9%	0.06 MB
D42	QGD; Semi-Tarrasch, 7.Bd3	126	31.7%	54.0%	0.03 MB
D43	QGD; Semi-Slav	3182	33.0%	52.0%	0.63 MB
D44	QGD; Semi-Slav 5.Bg5 dc	1102	25.3%	56.6%	0.17 MB
D45	QGD; Semi-Slav 5.e3	11795	34.0%	51.6%	2.28 MB
D46	QGD; Semi-Slav 6.Bd3	146	27.4%	59.6%	0.03 MB
D47	QGD; Semi-Slav 7.Bc4	9446	31.7%	52.1%	1.79 MB
D48	QGD; Meran, 8...a6	2114	30.9%	50.4%	0.42 MB
D49	QGD; Meran, 11. Nxb5	788	31.9%	51.3%	0.14 MB
D50	QGD; 4.Bg5	32	31.3%	59.4%	0.01 MB
D51	QGD; 4.Bg5 Nbd7	32	25.0%	56.3%	0.01 MB
D52	QGD	502	33.7%	56.1%	0.11 MB
D53	QGD; 4.Bg5 Be7	47	36.2%	60.6%	0.01 MB
D54	QGD; Anti-neo-Orthodox variation	6	50.0%	25.0%	0.00 MB
D55	QGD; 6.Nf3	476	42.9%	56.1%	0.10 MB
D56	QGD; Lasker defense	156	35.3%	53.5%	0.04 MB
D57	QGD; Lasker defense, Main line	8	50.0%	37.5%	0.00 MB
D58	QGD; Tartakower (Makagonov-Bondarevsky) system	5336	35.3%	51.7%	1.09 MB
D59	QGD; Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5	245	44.1%	46.9%	0.06 MB
D60	QGD; Orthodox defense	56	35.7%	53.6%	0.01 MB
D61	QGD; Orthodox defense, Rubinstein variation	106	28.3%	52.8%	0.03 MB
D62	QGD; Orthodox defense, 7.Qc2 c5, 8.cd (Rubinstein)	162	40.1%	53.4%	0.04 MB
D63	QGD; Orthodox defense, 7.Rc1	347	35.4%	55.5%	0.08 MB
D64	QGD; Orthodox defense, Rubinstein attack (with Rc1)	60	30.0%	55.0%	0.02 MB
D65	QGD; Orthodox defense, Rubinstein attack, Main line	5	40.0%	40.0%	0.00 MB
D66	QGD; Orthodox defense, Bd3 line	69	34.8%	60.9%	0.02 MB
D67	QGD; Orthodox defense, Bd3 line, Capablanca freeing manoever	203	45.3%	61.6%	0.05 MB
D68	QGD; Orthodox defense, Classical variation	177	39.5%	54.2%	0.04 MB
D69	QGD; Orthodox defense, Classical, 13.dxe5	14	64.3%	53.6%	0.00 MB
D70	Neo-Gruenfeld defense	59	28.8%	63.6%	0.02 MB
D71	Neo-Gruenfeld, 5.cd	59	49.2%	56.8%	0.02 MB
D72	Neo-Gruenfeld, 5.cd, Main line	26	30.8%	50.0%	0.01 MB
D73	Neo-Gruenfeld, 5.Nf3	182	33.5%	55.8%	0.04 MB
D74	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O	28	50.0%	53.6%	0.01 MB
D75	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3	22	22.7%	52.3%	0.01 MB
D76	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb6	164	36.0%	54.6%	0.04 MB
D77	Neo-Gruenfeld, 6.O-O	196	38.3%	52.8%	0.05 MB
D78	Neo-Gruenfeld, 6.O-O c6	187	38.0%	55.9%	0.04 MB
D79	Neo-Gruenfeld, 6.O-O, Main line	114	40.4%	53.5%	0.03 MB
D80	Gruenfeld defense	159	26.4%	54.7%	0.04 MB
D81	Gruenfeld; Russian variation	16	56.3%	53.1%	0.01 MB
D82	Gruenfeld 4.Bf4	115	40.0%	57.4%	0.03 MB
D83	Gruenfeld gambit	24	25.0%	50.0%	0.01 MB
D84	Gruenfeld gambit accepted	15	33.3%	63.3%	0.00 MB
D85	Gruenfeld, exchange variation	2977	40.7%	56.5%	0.54 MB
D86	Gruenfeld, Exchange, Classical variation	330	34.2%	54.7%	0.07 MB
D87	Gruenfeld, Exchange, Spassky variation	299	35.1%	58.0%	0.06 MB
D88	Gruenfeld, Spassky variation, Main line, 10...cd, 11.cd	55	45.5%	55.5%	0.01 MB
D89	Gruenfeld, Spassky variation, Main line, 13.Bd3	136	33.8%	50.0%	0.03 MB
D90	Gruenfeld, Three knights variation	109	29.4%	49.5%	0.03 MB
D91	Gruenfeld, Three knights variation	1155	34.8%	46.8%	0.24 MB
D92	Gruenfeld, 5.Bf4	224	33.5%	58.3%	0.05 MB
D93	Gruenfeld with 5. Bf4 O-O 6. e3	175	41.1%	60.6%	0.04 MB
D94	Gruenfeld, 5.e3	379	34.3%	56.2%	0.09 MB
D95	Gruenfeld with 5. e3 O-O 6. Qb3	56	32.1%	44.6%	0.02 MB
D96	Gruenfeld, Russian variation	61	34.4%	48.4%	0.01 MB
D97	Gruenfeld, Russian variation with 7. e4	1861	32.9%	51.2%	0.36 MB
D98	Gruenfeld, Russian, Smyslov variation	101	35.6%	59.4%	0.02 MB
D99	Gruenfeld defense, Smyslov, Main line	168	29.8%	59.5%	0.04 MB
E00	Queen's pawn game	1762	30.9%	54.1%	0.39 MB
E01	Catalan, closed	123	41.5%	53.3%	0.03 MB
E02	Catalan, open, 5.Qa4	14	28.6%	71.4%	0.00 MB
E03	Catalan, open, Alekhine variation	6	50.0%	25.0%	0.00 MB
E04	Catalan, Open, 5.Nf3	2318	36.5%	52.8%	0.44 MB
E05	Catalan, Open, Classical line	64	42.2%	46.1%	0.02 MB
E06	Catalan, Closed, 5.Nf3	1293	39.1%	53.6%	0.28 MB
E07	Catalan, Closed, 6...Nbd7	36	19.4%	48.6%	0.01 MB
E08	Catalan, Closed, 7.Qc2	149	36.2%	57.0%	0.04 MB
E09	Catalan, Closed, Main line	98	35.7%	54.6%	0.03 MB
E10	Queen's pawn game 3. Nf3	1599	34.7%	55.6%	0.34 MB
E11	Bogo-Indian defense	2573	33.3%	56.3%	0.53 MB
E12	Queen's Indian defense	6276	33.1%	51.8%	1.20 MB
E13	Queen's Indian, 4.Nc3, Main line	130	29.2%	56.9%	0.03 MB
E14	Queen's Indian, 4.e3	564	34.2%	49.4%	0.12 MB
E15	Queen's Indian, 4.g3	13588	31.9%	55.7%	2.63 MB
E16	Queen's Indian, Capablanca variation	253	30.4%	52.8%	0.06 MB
E17	Queen's Indian, 5.Bg2 Be7	623	32.6%	57.4%	0.13 MB
E18	Queen's Indian, Old Main line, 7.Nc3	812	34.0%	56.8%	0.18 MB
E19	Queen's Indian, Old Main line, 9.Qxc3	532	34.4%	54.8%	0.12 MB
E20	Nimzo-Indian defense	428	31.1%	51.8%	0.10 MB
E21	Nimzo-Indian, Three knights variation	650	34.3%	50.1%	0.14 MB
E22	Nimzo-Indian, Spielmann variation	29	24.1%	53.4%	0.01 MB
E23	Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc6	10	50.0%	65.0%	0.00 MB
E24	Nimzo-Indian, Saemisch variation	37	21.6%	54.1%	0.01 MB
E25	Nimzo-Indian, Saemisch variation, Keres variation	141	30.5%	53.5%	0.03 MB
E26	Nimzo-Indian, Saemisch variation, 4. a3 Bxc3+ 5. bxc3 c5 6. e3	15	0.0%	40.0%	0.00 MB
E27	Nimzo-Indian, Saemisch variation, 5...0-0	4	50.0%	50.0%	0.00 MB
E28	Nimzo-Indian, Saemisch variation, 6. e3	14	21.4%	53.6%	0.00 MB
E29	Nimzo-Indian, Saemisch variation, Main line	59	47.5%	45.8%	0.02 MB
E30	Nimzo-Indian, Leningrad variation,	166	28.9%	49.4%	0.04 MB
E31	Nimzo-Indian, Leningrad variation, main line	39	33.3%	50.0%	0.01 MB
E32	Nimzo-Indian, Classical variation	4827	37.7%	52.2%	0.91 MB
E33	Nimzo-Indian, Classical variation, 4...Nc6	123	33.3%	53.3%	0.03 MB
E34	Nimzo-Indian, Classical, Noa variation	185	42.7%	50.5%	0.05 MB
E35	Nimzo-Indian, Classical, Noa variation, 5. cxd5 exd5	160	37.5%	55.6%	0.04 MB
E36	Nimzo-Indian, Classical, Noa variation, 5. a3	21	19.0%	71.4%	0.01 MB
E37	Nimzo-Indian, Classical, Noa variation, Main line, 7.Qc2	51	33.3%	53.9%	0.01 MB
E38	Nimzo-Indian, Classical, 4...c5	294	34.0%	59.2%	0.06 MB
E39	Nimzo-Indian, Classical, Pirc variation	695	36.5%	57.8%	0.14 MB
E40	Nimzo-Indian, 4.e3	58	27.6%	63.8%	0.01 MB
E41	Nimzo-Indian, 4.e3 c5	1039	29.7%	49.4%	0.21 MB
E42	Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein)	1093	34.6%	56.6%	0.22 MB
E43	Nimzo-Indian, Fischer variation	231	30.3%	55.0%	0.05 MB
E44	Nimzo-Indian, Fischer variation, 5.Ne2	315	27.0%	51.9%	0.07 MB
E45	Nimzo-Indian, 4.e3, Bronstein (Byrne) variation	248	37.9%	52.4%	0.05 MB
E46	Nimzo-Indian, 4.e3 O-O	411	27.7%	49.6%	0.09 MB
E47	Nimzo-Indian, 4.e3 O-O, 5.Bd3	288	36.1%	58.7%	0.06 MB
E48	Nimzo-Indian, 4.e3 O-O, 5.Bd3 d5	206	36.4%	50.2%	0.05 MB
E49	Nimzo-Indian, 4.e3, Botvinnik system	149	32.2%	43.6%	0.03 MB
E50	Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d5	11	27.3%	50.0%	0.00 MB
E51	Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d5	36	44.4%	58.3%	0.01 MB
E52	Nimzo-Indian, 4.e3, Main line with ...b6	120	27.5%	56.3%	0.03 MB
E53	Nimzo-Indian, 4.e3, Main line with ...c5	562	34.5%	51.8%	0.12 MB
E54	Nimzo-Indian, 4.e3, Gligoric system with 7...dc	242	38.4%	54.3%	0.06 MB
E55	Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation	1487	38.3%	54.9%	0.31 MB
E56	Nimzo-Indian, 4.e3, Main line with 7...Nc6	35	31.4%	50.0%	0.01 MB
E58	Nimzo-Indian, 4.e3, Main line with 8...Bxc3	1224	28.4%	50.7%	0.23 MB
E59	Nimzo-Indian, 4.e3, Main line	1318	32.8%	55.2%	0.27 MB
E60	King's Indian defense	2080	30.9%	54.8%	0.43 MB
E61	King's Indian defense, 3.Nc3	403	2