CCRL 40/40

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	Commented PGN
A00	Irregular Openings	1118	38.2%	51.3%	0.73 MB
A01	Nimzovich-Larsen attack	365	33.2%	52.2%	0.24 MB
A02	Bird's Opening	50	28.0%	58.0%	0.03 MB
A03	Bird's Opening	18	55.6%	38.9%	0.01 MB
A04	Reti Opening	3305	36.5%	54.4%	2.07 MB
A05	Reti Opening, 2..Nf6	1724	39.1%	53.5%	1.09 MB
A06	Reti Opening, 2..d5	669	35.3%	50.7%	0.45 MB
A07	Reti Opening, King's Indian attack (Barcza system)	3177	39.9%	53.1%	2.36 MB
A08	Reti Opening, King's Indian attack	495	39.8%	48.0%	0.40 MB
A09	Reti Opening, 2..d5 3.c4	321	39.9%	51.1%	0.22 MB
A10	English Opening	940	41.2%	54.4%	0.62 MB
A11	English, Caro-Kann defensive system	248	42.3%	57.1%	0.17 MB
A12	English, Caro-Kann defensive system	135	41.5%	51.1%	0.10 MB
A13	English Opening	1639	38.5%	52.4%	1.07 MB
A14	English, Neo-Catalan declined	535	40.4%	54.4%	0.35 MB
A15	English, 1...Nf6 (Anglo-Indian defense)	2948	38.7%	54.0%	1.81 MB
A16	English Opening	491	31.0%	55.0%	0.32 MB
A17	English Opening	744	40.2%	56.1%	0.47 MB
A18	English, Mikenas-Carls variation	56	39.3%	58.9%	0.04 MB
A19	English, Mikenas-Carls, Sicilian variation	54	40.7%	59.3%	0.04 MB
A20	English Opening	1893	36.8%	54.4%	1.27 MB
A21	English Opening	808	33.0%	54.9%	0.54 MB
A22	English Opening	866	36.5%	49.9%	0.56 MB
A23	English Opening, Bremen system, Keres variation	68	32.4%	60.3%	0.05 MB
A24	English Opening, Bremen system with 3...g6	18	50.0%	58.3%	0.01 MB
A25	English Opening, Sicilian Reversed	733	36.8%	52.9%	0.48 MB
A26	English Opening, Closed system	218	39.9%	54.4%	0.14 MB
A27	English Opening, Three knights system	94	26.6%	61.2%	0.07 MB
A28	English Opening, Four knights system	1160	38.0%	51.8%	0.76 MB
A29	English Opening, Four knights, kingside Fianchetto	2482	37.8%	52.0%	1.53 MB
A30	English Opening, Symmetrical variation	2821	38.9%	55.2%	1.80 MB
A31	English Opening, Symmetrical, Benoni formation	269	40.5%	57.1%	0.19 MB
A32	English Opening, Symmetrical	95	37.9%	56.8%	0.07 MB
A33	English Opening, Symmetrical	777	43.6%	56.6%	0.50 MB
A34	English Opening, Symmetrical	873	35.2%	54.7%	0.57 MB
A35	English Opening, Symmetrical	811	41.1%	51.7%	0.53 MB
A36	English Opening, Symmetrical	559	35.8%	54.9%	0.37 MB
A37	English Opening, Symmetrical	406	34.0%	51.0%	0.27 MB
A38	English Opening, Symmetrical	333	44.1%	53.6%	0.23 MB
A39	English Opening, Symmetrical, Main line with d4	262	41.2%	58.4%	0.17 MB
A40	Queen's pawn	2008	37.0%	57.2%	1.32 MB
A41	Queen's pawn	1121	33.3%	55.9%	0.74 MB
A42	Modern defense, Averbakh system	426	34.7%	65.5%	0.28 MB
A43	Old Benoni defense	460	31.5%	57.9%	0.29 MB
A44	Old Benoni defence	36	36.1%	62.5%	0.02 MB
A45	Queen's pawn game	1443	34.6%	52.6%	0.90 MB
A46	Queen's pawn game	1500	35.6%	53.5%	0.94 MB
A47	Queen's Indian defense	214	37.4%	56.1%	0.15 MB
A48	King's Indian, East Indian defense	939	37.1%	50.6%	0.60 MB
A49	King's Indian, Fianchetto without c4	394	37.8%	58.2%	0.25 MB
A50	Queen's pawn game	248	37.1%	54.4%	0.17 MB
A51	Budapest defense declined	10	0.0%	60.0%	0.01 MB
A52	Budapest defense	219	42.0%	58.9%	0.16 MB
A53	Old Indian defense	341	36.4%	56.9%	0.23 MB
A54	Old Indian, Ukrainian variation	88	46.6%	63.1%	0.07 MB
A55	Old Indian, Main line	166	43.4%	60.2%	0.12 MB
A56	Benoni defense	530	26.6%	62.4%	0.32 MB
A57	Benko gambit	477	34.8%	54.5%	0.30 MB
A58	Benko gambit accepted	241	39.0%	56.8%	0.15 MB
A59	Benko gambit, 7.e4	89	43.8%	56.7%	0.06 MB
A60	Benoni defense	26	23.1%	65.4%	0.02 MB
A61	Benoni defense	507	22.5%	56.6%	0.29 MB
A62	Benoni, Fianchetto variation	146	32.9%	56.2%	0.10 MB
A63	Benoni, Fianchetto variation, 9...Nbd7	22	36.4%	63.6%	0.02 MB
A64	Benoni, Fianchetto variation, 11...Re8	47	36.2%	43.6%	0.03 MB
A65	Benoni, 6.e4	35	22.9%	48.6%	0.02 MB
A67	Benoni, Taimanov variation	27	14.8%	70.4%	0.02 MB
A69	Benoni, Four pawns attack, Main line	16	56.3%	59.4%	0.01 MB
A70	Benoni, Classical with e4 and Nf3	218	32.1%	56.4%	0.14 MB
A71	Benoni, Classical, 8.Bg5	48	20.8%	52.1%	0.03 MB
A72	Benoni, Classical without 9.O-O	23	17.4%	78.3%	0.02 MB
A73	Benoni, Classical, 9.O-O	26	19.2%	63.5%	0.02 MB
A74	Benoni, Classical, 9...a6, 10.a4	3	0.0%	66.7%	0.00 MB
A75	Benoni, Classical with ...a6 and 10...Bg4	27	25.9%	68.5%	0.02 MB
A76	Benoni, Classical, 9...Re8	35	31.4%	58.6%	0.03 MB
A77	Benoni, Classical, 9...Re8, 10.Nd2	61	27.9%	66.4%	0.04 MB
A78	Benoni, Classical with ...Re8 and ...Na6	17	35.3%	52.9%	0.01 MB
A79	Benoni, Classical, 11.f3	29	31.0%	56.9%	0.02 MB
A80	Dutch	596	35.6%	55.4%	0.40 MB
A81	Dutch defense	911	36.2%	56.4%	0.59 MB
A82	Dutch, Staunton gambit	5	40.0%	40.0%	0.00 MB
A83	Dutch, Staunton gambit, Staunton's line	21	38.1%	52.4%	0.01 MB
A84	Dutch defense	289	41.5%	55.7%	0.20 MB
A85	Dutch with 2.c4 & 3.Nc3	74	35.1%	55.4%	0.05 MB
A86	Dutch with 2.c4 & 3.g3	42	50.0%	60.7%	0.03 MB
A87	Dutch, Leningrad, Main variation	137	43.1%	54.4%	0.10 MB
A88	Dutch, Leningrad, Main variation with 7...c6	290	34.5%	59.7%	0.19 MB
A89	Dutch, Leningrad, Main variation with Nc6	185	40.0%	65.9%	0.13 MB
A90	Dutch defense	335	38.2%	59.4%	0.24 MB
A91	Dutch defense	16	37.5%	62.5%	0.01 MB
A92	Dutch defense	67	41.8%	67.2%	0.05 MB
A93	Dutch, Stonewall, Botwinnik variation	37	24.3%	55.4%	0.03 MB
A94	Dutch, Stonewall with Ba3	24	50.0%	66.7%	0.02 MB
A95	Dutch, Stonewall with Nc3	38	26.3%	60.5%	0.03 MB
A96	Dutch, Classical variation	65	29.2%	62.3%	0.05 MB
A97	Dutch, Ilyin-Genevsky variation	44	38.6%	62.5%	0.03 MB
A98	Dutch, Ilyin-Genevsky variation with Qc2	14	35.7%	53.6%	0.01 MB
A99	Dutch, Ilyin-Genevsky variation with b3	52	36.5%	66.3%	0.04 MB
B00	King's pawn Opening	506	36.6%	58.2%	0.36 MB
B01	Scandinavian (centercounter) center defense	631	39.3%	59.3%	0.40 MB
B02	Alekhine's defense	140	40.7%	54.6%	0.10 MB
B03	Alekhine's defense	155	34.2%	63.5%	0.10 MB
B04	Alekhine's defense, Modern variation	228	32.5%	64.5%	0.15 MB
B05	Alekhine's defense, Modern variation, 4...Bg4	191	30.9%	64.1%	0.13 MB
B06	Robatsch (Modern) defense	2862	36.1%	57.9%	1.86 MB
B07	Pirc defense	1011	35.7%	58.3%	0.70 MB
B08	Pirc, Classical (Two knights) system	1052	36.7%	57.9%	0.73 MB
B09	Pirc, Austrian attack	734	38.3%	60.4%	0.46 MB
B10	Caro-Kann defense	1362	34.4%	56.2%	0.88 MB
B11	Caro-Kann, Two knights, 3...Bg4	191	33.0%	52.1%	0.14 MB
B12	Caro-Kann defense	2115	34.3%	55.6%	1.29 MB
B13	Caro-Kann, Exchange variation	457	45.3%	50.7%	0.29 MB
B14	Caro-Kann, Panov-Botvinnik attack, 5...e6	799	43.2%	52.9%	0.51 MB
B15	Caro-Kann defense	325	32.0%	57.5%	0.22 MB
B16	Caro-Kann, Bronstein-Larsen variation	70	28.6%	55.7%	0.05 MB
B17	Caro-Kann, Steinitz variation	1282	39.5%	53.1%	0.80 MB
B18	Caro-Kann, Classical variation	459	37.9%	53.2%	0.32 MB
B19	Caro-Kann, Classical, 7...Nd7	1354	37.7%	55.3%	0.80 MB
B20	Sicilian defense	752	37.4%	50.9%	0.47 MB
B21	Sicilian, Grand Prix attack	295	36.3%	50.3%	0.18 MB
B22	Sicilian, Alapin's variation (2.c3)	1820	39.2%	55.1%	1.17 MB
B23	Sicilian, Closed	1231	35.2%	53.0%	0.80 MB
B24	Sicilian, Closed	108	30.6%	51.4%	0.07 MB
B25	Sicilian, Closed	195	40.0%	51.3%	0.14 MB
B26	Sicilian, Closed, 6.Be3	108	34.3%	48.6%	0.07 MB
B27	Sicilian defense	3042	40.7%	58.8%	1.97 MB
B28	Sicilian, O'Kelly variation	60	43.3%	53.3%	0.04 MB
B29	Sicilian, Nimzovich-Rubinstein variation	53	37.7%	52.8%	0.04 MB
B30	Sicilian defense	1758	36.5%	56.0%	1.15 MB
B31	Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6)	726	38.6%	55.1%	0.48 MB
B32	Sicilian defense	881	37.0%	58.9%	0.57 MB
B33	Sicilian defense	2251	33.5%	55.1%	1.30 MB
B34	Sicilian, Accelerated Fianchetto, Exchange variation	173	34.7%	54.3%	0.13 MB
B35	Sicilian, Accelerated Fianchetto, Modern variation with Bc4	903	42.0%	52.8%	0.59 MB
B36	Sicilian, Accelerated Fianchetto, Maroczy bind	578	42.7%	58.7%	0.39 MB
B37	Sicilian, Accelerated Fianchetto, Maroczy bind, 5...Bg7	77	53.2%	60.4%	0.06 MB
B38	Sicilian, Accelerated Fianchetto, Maroczy bind, 6.Be3	821	42.5%	58.2%	0.54 MB
B39	Sicilian, Accelerated Fianchetto, Breyer variation	459	39.7%	56.4%	0.30 MB
B40	Sicilian defense	1794	35.7%	55.4%	1.20 MB
B41	Sicilian, Kan variation	189	33.3%	53.2%	0.13 MB
B42	Sicilian, Kan, 5.Bd3	1141	36.1%	56.4%	0.74 MB
B43	Sicilian, Kan, 5.Nc3	676	34.2%	57.0%	0.44 MB
B44	Sicilian defense	603	39.1%	51.1%	0.38 MB
B45	Sicilian, Taimanov variation	958	38.0%	57.0%	0.58 MB
B46	Sicilian, Taimanov variation	1484	38.6%	54.4%	0.89 MB
B47	Sicilian, Taimanov (Bastrikov) variation	2108	38.3%	54.3%	1.31 MB
B48	Sicilian, Taimanov variation	1107	35.0%	53.5%	0.68 MB
B49	Sicilian, Taimanov variation	308	40.6%	56.3%	0.21 MB
B50	Sicilian	737	36.4%	55.5%	0.52 MB
B51	Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack	388	43.0%	54.3%	0.27 MB
B52	Sicilian, Canal-Sokolsky attack, 3...Bd7	576	41.7%	53.0%	0.37 MB
B53	Sicilian, Chekhover variation	179	35.8%	54.2%	0.13 MB
B54	Sicilian	417	35.7%	54.8%	0.29 MB
B55	Sicilian, Prins variation, Venice attack	9	44.4%	66.7%	0.01 MB
B56	Sicilian	544	35.5%	53.8%	0.35 MB
B57	Sicilian, Sozin (not Scheveningen)	647	39.3%	50.1%	0.43 MB
B58	Sicilian, Classical	339	38.3%	47.8%	0.21 MB
B59	Sicilian, Boleslavsky variation, 7.Nb3	32	25.0%	50.0%	0.02 MB
B60	Sicilian, Richter-Rauzer	130	29.2%	59.2%	0.09 MB
B61	Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2	138	31.9%	57.2%	0.09 MB
B62	Sicilian, Richter-Rauzer, 6...e6	106	32.1%	50.9%	0.08 MB
B63	Sicilian, Richter-Rauzer, Rauzer attack	481	29.9%	54.9%	0.29 MB
B64	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f4	196	38.3%	51.3%	0.13 MB
B65	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4	312	37.5%	58.2%	0.19 MB
B66	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6	4274	32.3%	51.6%	2.39 MB
B67	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd7	1289	30.7%	55.5%	0.76 MB
B68	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7	53	34.0%	62.3%	0.04 MB
B69	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf6	83	32.5%	62.0%	0.05 MB
B70	Sicilian, Dragon variation	221	36.2%	49.3%	0.15 MB
B71	Sicilian, Dragon, Levenfish variation	7	28.6%	57.1%	0.01 MB
B72	Sicilian, Dragon, 6.Be3	67	37.3%	50.0%	0.05 MB
B73	Sicilian, Dragon, Classical, 8.O-O	156	45.5%	55.4%	0.11 MB
B74	Sicilian, Dragon, Classical, 9.Nb3	132	40.2%	54.9%	0.10 MB
B75	Sicilian, Dragon, Yugoslav attack	78	30.8%	64.1%	0.05 MB
B76	Sicilian, Dragon, Yugoslav attack, 7...O-O	370	27.0%	64.1%	0.22 MB
B77	Sicilian, Dragon, Yugoslav attack, 9.Bc4	160	39.4%	59.7%	0.10 MB
B78	Sicilian, Dragon, Yugoslav attack, 10.O-O-O	102	23.5%	51.0%	0.06 MB
B79	Sicilian, Dragon, Yugoslav attack, 12.h4	8	25.0%	50.0%	0.01 MB
B80	Sicilian, Scheveningen variation	636	31.6%	52.9%	0.38 MB
B81	Sicilian, Scheveningen, Keres attack	1089	30.8%	61.1%	0.61 MB
B82	Sicilian, Scheveningen, 6.f4	248	32.7%	58.3%	0.16 MB
B83	Sicilian, Scheveningen, 6.Be2	753	39.8%	53.8%	0.50 MB
B84	Sicilian, Scheveningen (Paulsen), Classical variation	2037	37.1%	50.3%	1.26 MB
B85	Sicilian, Scheveningen, Classical variation with ...Qc7 and ...Nc6	319	42.3%	54.4%	0.21 MB
B86	Sicilian, Sozin attack	45	40.0%	46.7%	0.03 MB
B87	Sozin with ...a6 and ...b5	431	36.2%	52.9%	0.27 MB
B88	Sicilian, Sozin, Leonhardt variation	257	40.1%	57.4%	0.16 MB
B89	Sicilian, Sozin, 7.Be3	964	31.0%	51.5%	0.57 MB
B90	Sicilian, Najdorf	7982	31.0%	53.0%	4.47 MB
B91	Sicilian, Najdorf, Zagreb (Fianchetto) variation	143	34.3%	55.6%	0.09 MB
B92	Sicilian, Najdorf, Zagreb (Fianchetto) variation	1567	38.3%	52.6%	1.00 MB
B93	Sicilian, Najdorf, 6.f4	655	40.3%	50.8%	0.41 MB
B94	Sicilian, Najdorf, 6.Bg5	61	27.9%	59.8%	0.04 MB
B95	Sicilian, Najdorf, 6...e6	78	30.8%	41.0%	0.05 MB
B96	Sicilian, Najdorf, 7.f4	213	35.2%	47.7%	0.14 MB
B97	Sicilian, Najdorf, 7...Qb6	972	37.3%	47.4%	0.53 MB
B98	Sicilian, Najdorf, 7...Be7	173	32.9%	61.0%	0.10 MB
B99	Sicilian, Najdorf, 7...Be7 Main line	345	24.6%	54.3%	0.18 MB
C00	French defense	1981	37.6%	50.6%	1.35 MB
C01	French, Exchange variation	535	38.1%	54.6%	0.36 MB
C02	French, Advance variation	1187	32.4%	53.5%	0.76 MB
C03	French, Tarrasch	562	41.1%	57.7%	0.38 MB
C04	French, Tarrasch, Guimard Main line	84	21.4%	59.5%	0.06 MB
C05	French, Tarrasch, Closed variation	357	32.2%	57.8%	0.22 MB
C06	French, Tarrasch, Closed variation, Main line	606	36.8%	60.0%	0.37 MB
C07	French, Tarrasch, Open variation	1170	47.1%	51.2%	0.75 MB
C08	French, Tarrasch, Open, 4.exd5 exd5	539	49.4%	54.5%	0.34 MB
C09	French, Tarrasch, Open variation, Main line	557	46.9%	57.5%	0.37 MB
C10	French, Paulsen variation	1146	38.1%	54.2%	0.70 MB
C11	French defense	2623	37.1%	55.5%	1.56 MB
C12	French, MacCutcheon variation	352	29.8%	56.1%	0.22 MB
C13	French, Classical	73	28.8%	56.8%	0.05 MB
C14	French, Classical variation	198	34.8%	57.8%	0.12 MB
C15	French, Winawer (Nimzovich) variation	287	40.4%	53.7%	0.21 MB
C16	French, Winawer, Advance variation	342	36.0%	57.2%	0.22 MB
C17	French, Winawer, Advance variation	371	31.3%	55.5%	0.23 MB
C18	French, Winawer, Advance variation	129	26.4%	58.9%	0.08 MB
C19	French, Winawer, Advance, 6...Ne7	2112	30.2%	59.3%	1.32 MB
C20	King's pawn game	22	36.4%	40.9%	0.02 MB
C21	center game	65	46.2%	70.8%	0.05 MB
C22	center game	87	27.6%	65.5%	0.05 MB
C23	Bishop's Opening	170	38.8%	57.6%	0.11 MB
C24	Bishop's Opening, Berlin defense	225	36.4%	54.2%	0.15 MB
C25	Vienna game	150	34.0%	58.3%	0.10 MB
C26	Vienna, Falkbeer variation	170	35.9%	50.9%	0.12 MB
C27	Vienna game	21	28.6%	47.6%	0.02 MB
C28	Vienna game	89	41.6%	47.8%	0.07 MB
C29	Vienna gambit, Kaufmann variation	50	34.0%	59.0%	0.03 MB
C30	King's gambit	34	29.4%	67.6%	0.02 MB
C31	KGD, Falkbeer counter-gambit	6	66.7%	66.7%	0.01 MB
C32	KGD, Falkbeer, 5. dxe4	1	0.0%	100.0%	0.00 MB
C33	King's gambit accepted	47	34.0%	51.1%	0.03 MB
C34	King's knight's gambit	26	26.9%	63.5%	0.02 MB
C35	KGA, Cunningham defense	11	18.2%	45.5%	0.01 MB
C36	KGA, Abbazia defense (Classical defense, Modern defense)	17	23.5%	70.6%	0.01 MB
C37	KGA, Quaade gambit	5	60.0%	50.0%	0.01 MB
C38	King's knight's gambit	5	0.0%	0.0%	0.00 MB
C39	King's knight's gambit	39	25.6%	38.5%	0.03 MB
C40	King's knight Opening	46	37.0%	64.1%	0.04 MB
C41	Philidor's defense	416	38.9%	55.8%	0.28 MB
C42	Petrov's defense	2457	40.7%	57.3%	1.51 MB
C43	Petrov, Modern (Steinitz) attack	769	41.4%	52.3%	0.46 MB
C44	King's pawn game	289	36.0%	50.5%	0.20 MB
C45	Scotch game	1851	40.0%	52.7%	1.13 MB
C46	Three knights game	309	44.0%	47.9%	0.22 MB
C47	Four knights, Scotch variation	177	48.0%	54.0%	0.12 MB
C48	Four knights, Spanish variation	517	42.2%	55.7%	0.34 MB
C49	Four knights, double Ruy Lopez	375	40.0%	55.2%	0.27 MB
C50	King's pawn game	875	37.0%	52.3%	0.57 MB
C51	Evans gambit declined	150	34.0%	45.7%	0.09 MB
C52	Evans gambit	47	36.2%	50.0%	0.03 MB
C53	Giuoco piano	938	35.6%	55.0%	0.62 MB
C54	Guioco piano	57	45.6%	47.4%	0.04 MB
C55	Two knights defense	460	37.4%	57.0%	0.32 MB
C56	Two knights defense	30	53.3%	46.7%	0.02 MB
C57	Two knights defense	13	30.8%	46.2%	0.01 MB
C58	Two knights defense	42	40.5%	56.0%	0.04 MB
C59	Two knights defense	325	32.0%	51.4%	0.20 MB
C60	Ruy Lopez	142	39.4%	54.9%	0.10 MB
C61	Ruy Lopez, Bird's defense	39	38.5%	62.8%	0.03 MB
C62	Ruy Lopez, Old Steinitz defence	137	27.7%	55.5%	0.10 MB
C63	Ruy Lopez, Schilemann defense	60	28.3%	59.2%	0.04 MB
C64	Ruy Lopez, Classical (Cordel) defence	347	35.4%	55.5%	0.23 MB
C65	Ruy Lopez, Berlin defense	517	32.5%	50.3%	0.38 MB
C66	Ruy Lopez, Berlin defence, 4.O-O, d6	228	53.5%	55.7%	0.15 MB
C67	Ruy Lopez, Berlin defence, Open variation	1058	43.0%	53.2%	0.67 MB
C68	Ruy Lopez, Exchange variation	73	52.1%	50.7%	0.05 MB
C69	Ruy Lopez, Exchange variation, 5.O-O	535	36.4%	55.6%	0.35 MB
C70	Ruy Lopez,	186	38.2%	61.0%	0.13 MB
C71	Ruy Lopez, Modern Steinitz defense	83	38.6%	51.8%	0.06 MB
C72	Ruy Lopez, Modern Steinitz defense 5.0-0	129	41.1%	61.6%	0.09 MB
C73	Ruy Lopez, Modern Steinitz defense, Richter variation	78	39.7%	54.5%	0.06 MB
C74	Ruy Lopez, Modern Steinitz defense	49	30.6%	52.0%	0.04 MB
C75	Ruy Lopez, Modern Steinitz defense	70	37.1%	55.7%	0.05 MB
C76	Ruy Lopez, Modern Steinitz defense, Fianchetto (Bronstein) variation	141	36.2%	52.8%	0.10 MB
C77	Ruy Lopez, Morphy defence	417	40.5%	55.5%	0.32 MB
C78	Ruy Lopez, 5.O-O	888	39.5%	56.9%	0.56 MB
C79	Ruy Lopez, Steinitz defense deferred (Russian defence)	139	37.4%	54.7%	0.10 MB
C80	Ruy Lopez, Open (Tarrasch) defence	676	37.7%	54.1%	0.40 MB
C81	Ruy Lopez, Open, Howell attack	26	46.2%	50.0%	0.02 MB
C82	Ruy Lopez, Open, 9.c3	119	38.7%	60.5%	0.08 MB
C83	Ruy Lopez, Open, Classical defence	75	44.0%	54.0%	0.05 MB
C84	Ruy Lopez, Closed defense	552	39.3%	52.4%	0.35 MB
C85	Ruy Lopez, Exchange variation doubly deferred (DERLD)	582	36.4%	49.5%	0.37 MB
C86	Worrall attack	111	36.9%	57.2%	0.08 MB
C87	Ruy Lopez, Closed, Averbach variation	130	35.4%	60.0%	0.11 MB
C88	Ruy Lopez, Closed	2194	36.2%	53.1%	1.40 MB
C89	Ruy Lopez, Marshall counter-attack	352	41.2%	55.3%	0.23 MB
C90	Ruy Lopez, closed (with ...d6)	1117	34.4%	50.5%	0.76 MB
C91	Ruy Lopez, closed, 9.d4	2661	38.0%	55.1%	1.73 MB
C92	Ruy Lopez, closed, 9.d4	2054	39.9%	56.4%	1.27 MB
C93	Ruy Lopez, closed, Smyslov defense	98	42.9%	55.1%	0.07 MB
C94	Ruy Lopez, Closed, Breyer defense	22	27.3%	59.1%	0.02 MB
C95	Ruy Lopez, closed, Breyer, 10.d4	683	39.2%	56.7%	0.46 MB
C96	Ruy Lopez, closed, 8...Na5	505	34.7%	60.3%	0.34 MB
C97	Ruy Lopez, Closed, Chigorin defense	536	31.7%	63.4%	0.36 MB
C98	Ruy Lopez, Closed, Chigorin, 12...Nc6	158	31.0%	61.1%	0.12 MB
C99	Ruy Lopez, Closed, Chigorin, 12...c5d4	890	40.8%	62.6%	0.56 MB
D00	Queen's pawn game	662	37.9%	51.3%	0.42 MB
D01	Richter-Veresov attack	128	32.8%	45.3%	0.09 MB
D02	Queen's pawn game, 2. Nf3	2853	36.8%	52.7%	1.84 MB
D03	Torre attack, Tartakower variation	122	40.2%	50.4%	0.09 MB
D04	Queen's pawn game	185	36.2%	50.0%	0.14 MB
D05	Queen's pawn game, Zukertort variation	207	34.3%	54.8%	0.14 MB
D06	Queen's Gambit	82	41.5%	62.2%	0.06 MB
D07	QGD; Chigorin defense	398	34.7%	58.3%	0.24 MB
D08	QGD; Albin counter-gambit	16	31.3%	65.6%	0.01 MB
D09	QGD; Albin counter-gambit, 5.g3	7	28.6%	57.1%	0.01 MB
D10	QGD; Slav defense	1388	36.4%	53.3%	0.93 MB
D11	QGD; Slav defense, 3.Nf3	956	38.1%	55.1%	0.66 MB
D12	QGD; Slav defense, 4.e3 Bf5	858	39.0%	52.9%	0.57 MB
D13	QGD; Slav defense, Exchange variation	274	42.0%	56.8%	0.19 MB
D14	QGD; Slav defense, Exchange variation	287	44.6%	50.9%	0.17 MB
D15	QGD; Slav accepted, Exchange variation, 6.Bf4 Bf5	893	36.6%	52.9%	0.62 MB
D16	QGD; Slav accepted, Alapin variation	142	33.1%	64.4%	0.09 MB
D17	QGD; Slav defense, Czech defence	754	40.5%	56.4%	0.46 MB
D18	QGD; Dutch variation	61	36.1%	57.4%	0.04 MB
D19	QGD; Dutch variation	740	38.2%	57.6%	0.46 MB
D20	Queen's Gambit accepted	1012	39.1%	58.4%	0.65 MB
D21	QGA, 3.Nf3	123	39.8%	55.7%	0.08 MB
D22	QGA; Alekhine defense	58	46.6%	54.3%	0.04 MB
D23	Queen's gambit accepted	57	36.8%	50.0%	0.04 MB
D24	QGA, 4.Nc3	124	43.5%	52.4%	0.08 MB
D25	QGA, 4.e3	221	42.5%	59.3%	0.15 MB
D26	QGA; classical variation	549	49.2%	52.6%	0.36 MB
D27	QGA; classical variation	1980	46.1%	54.2%	1.24 MB
D28	QGA; Classical variation 7.Qe2	74	37.8%	60.8%	0.05 MB
D29	QGA; Classical variation 8...Bb7	171	38.0%	44.7%	0.11 MB
D30	QGD	2296	40.3%	55.0%	1.45 MB
D31	QGD, 3.Nc3	833	38.8%	52.2%	0.59 MB
D32	QGD; Tarrasch defense	148	46.6%	54.4%	0.13 MB
D33	QGD; Tarrasch, Schlechter-Rubinstein system	55	45.5%	57.3%	0.04 MB
D34	QGD; Tarrasch, 7...Be7	722	46.3%	56.0%	0.47 MB
D35	QGD; 3...Nf6	605	41.0%	53.7%	0.40 MB
D36	QGD; Exchange, positional line, 6.Qc2	48	39.6%	44.8%	0.04 MB
D37	QGD; 4.Nf3	2678	41.7%	54.4%	1.65 MB
D38	QGD; Ragozin variation	927	43.3%	51.7%	0.60 MB
D39	QGD; Ragozin, Vienna variation	717	49.1%	52.2%	0.41 MB
D40	QGD; Semi-Tarrasch defense	214	42.1%	53.3%	0.15 MB
D41	QGD; Semi-Tarrasch, 5.cd	294	42.2%	58.2%	0.18 MB
D42	QGD; Semi-Tarrasch, 7.Bd3	119	38.7%	59.7%	0.09 MB
D43	QGD; Semi-Slav	2346	37.1%	53.6%	1.46 MB
D44	QGD; Semi-Slav 5.Bg5 dc	609	34.2%	56.2%	0.31 MB
D45	QGD; Semi-Slav 5.e3	6646	40.5%	52.5%	4.03 MB
D46	QGD; Semi-Slav 6.Bd3	391	40.2%	58.4%	0.26 MB
D47	QGD; Semi-Slav 7.Bc4	5276	36.4%	54.4%	3.11 MB
D48	QGD; Meran, 8...a6	1101	38.6%	52.0%	0.66 MB
D49	QGD; Meran, 11. Nxb5	442	42.3%	47.9%	0.25 MB
D50	QGD; 4.Bg5	35	34.3%	45.7%	0.02 MB
D51	QGD; 4.Bg5 Nbd7	48	37.5%	58.3%	0.03 MB
D52	QGD	377	44.3%	52.4%	0.26 MB
D53	QGD; 4.Bg5 Be7	115	40.9%	50.9%	0.08 MB
D54	QGD; Anti-neo-Orthodox variation	21	38.1%	47.6%	0.02 MB
D55	QGD; 6.Nf3	460	45.9%	52.9%	0.29 MB
D56	QGD; Lasker defense	185	39.5%	51.6%	0.12 MB
D57	QGD; Lasker defense, Main line	32	59.4%	54.7%	0.02 MB
D58	QGD; Tartakower (Makagonov-Bondarevsky) system	3523	44.8%	51.7%	2.25 MB
D59	QGD; Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5	170	44.7%	44.7%	0.11 MB
D60	QGD; Orthodox defense	75	28.0%	60.7%	0.06 MB
D61	QGD; Orthodox defense, Rubinstein variation	113	46.0%	50.4%	0.08 MB
D62	QGD; Orthodox defense, 7.Qc2 c5, 8.cd (Rubinstein)	82	52.4%	57.9%	0.06 MB
D63	QGD; Orthodox defense, 7.Rc1	251	39.8%	55.8%	0.17 MB
D64	QGD; Orthodox defense, Rubinstein attack (with Rc1)	73	42.5%	50.0%	0.06 MB
D65	QGD; Orthodox defense, Rubinstein attack, Main line	3	33.3%	83.3%	0.00 MB
D66	QGD; Orthodox defense, Bd3 line	121	37.2%	62.4%	0.09 MB
D67	QGD; Orthodox defense, Bd3 line, Capablanca freeing manoever	98	39.8%	55.6%	0.07 MB
D68	QGD; Orthodox defense, Classical variation	108	51.9%	55.6%	0.07 MB
D69	QGD; Orthodox defense, Classical, 13.dxe5	22	59.1%	47.7%	0.01 MB
D70	Neo-Gruenfeld defense	36	36.1%	48.6%	0.03 MB
D71	Neo-Gruenfeld, 5.cd	62	45.2%	54.8%	0.04 MB
D72	Neo-Gruenfeld, 5.cd, Main line	58	31.0%	58.6%	0.04 MB
D73	Neo-Gruenfeld, 5.Nf3	207	51.2%	54.6%	0.18 MB
D74	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O	49	38.8%	54.1%	0.04 MB
D75	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3	32	40.6%	57.8%	0.03 MB
D76	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb6	227	39.6%	55.5%	0.16 MB
D77	Neo-Gruenfeld, 6.O-O	269	47.6%	56.1%	0.19 MB
D78	Neo-Gruenfeld, 6.O-O c6	407	41.0%	55.4%	0.26 MB
D79	Neo-Gruenfeld, 6.O-O, Main line	159	45.3%	50.3%	0.12 MB
D80	Gruenfeld defense	168	38.7%	59.2%	0.12 MB
D81	Gruenfeld; Russian variation	12	58.3%	62.5%	0.01 MB
D82	Gruenfeld 4.Bf4	196	39.8%	56.1%	0.13 MB
D83	Gruenfeld gambit	48	52.1%	61.5%	0.04 MB
D84	Gruenfeld gambit accepted	15	53.3%	53.3%	0.01 MB
D85	Gruenfeld, exchange variation	1946	47.5%	54.3%	1.19 MB
D86	Gruenfeld, Exchange, Classical variation	292	42.5%	55.1%	0.19 MB
D87	Gruenfeld, Exchange, Spassky variation	221	43.0%	56.3%	0.14 MB
D88	Gruenfeld, Spassky variation, Main line, 10...cd, 11.cd	55	36.4%	63.6%	0.04 MB
D89	Gruenfeld, Spassky variation, Main line, 13.Bd3	70	35.7%	46.4%	0.05 MB
D90	Gruenfeld, Three knights variation	120	38.3%	52.5%	0.08 MB
D91	Gruenfeld, Three knights variation	469	36.2%	48.6%	0.33 MB
D92	Gruenfeld, 5.Bf4	232	47.8%	56.3%	0.15 MB
D93	Gruenfeld with 5. Bf4 O-O 6. e3	95	49.5%	56.3%	0.07 MB
D94	Gruenfeld, 5.e3	346	46.5%	56.2%	0.25 MB
D95	Gruenfeld with 5. e3 O-O 6. Qb3	18	33.3%	50.0%	0.02 MB
D96	Gruenfeld, Russian variation	44	38.6%	62.5%	0.03 MB
D97	Gruenfeld, Russian variation with 7. e4	1038	40.4%	52.9%	0.65 MB
D98	Gruenfeld, Russian, Smyslov variation	130	43.1%	59.2%	0.08 MB
D99	Gruenfeld defense, Smyslov, Main line	115	43.5%	55.7%	0.08 MB
E00	Queen's pawn game	1281	36.7%	54.6%	0.83 MB
E01	Catalan, closed	72	38.9%	56.9%	0.06 MB
E02	Catalan, open, 5.Qa4	44	40.9%	61.4%	0.03 MB
E03	Catalan, open, Alekhine variation	5	100.0%	50.0%	0.01 MB
E04	Catalan, Open, 5.Nf3	1156	41.3%	52.0%	0.71 MB
E05	Catalan, Open, Classical line	42	33.3%	52.4%	0.03 MB
E06	Catalan, Closed, 5.Nf3	1010	45.6%	53.5%	0.64 MB
E07	Catalan, Closed, 6...Nbd7	58	41.4%	44.8%	0.05 MB
E08	Catalan, Closed, 7.Qc2	120	37.5%	54.6%	0.08 MB
E09	Catalan, Closed, Main line	79	30.4%	63.3%	0.06 MB
E10	Queen's pawn game 3. Nf3	1256	40.4%	56.6%	0.81 MB
E11	Bogo-Indian defense	1582	36.5%	55.5%	0.99 MB
E12	Queen's Indian defense	4517	37.6%	53.1%	2.83 MB
E13	Queen's Indian, 4.Nc3, Main line	65	30.8%	55.4%	0.04 MB
E14	Queen's Indian, 4.e3	678	38.5%	54.2%	0.45 MB
E15	Queen's Indian, 4.g3	8616	36.5%	56.5%	5.26 MB
E16	Queen's Indian, Capablanca variation	276	37.0%	56.5%	0.18 MB
E17	Queen's Indian, 5.Bg2 Be7	512	40.6%	54.3%	0.33 MB
E18	Queen's Indian, Old Main line, 7.Nc3	867	42.6%	56.9%	0.53 MB
E19	Queen's Indian, Old Main line, 9.Qxc3	562	40.2%	58.4%	0.36 MB
E20	Nimzo-Indian defense	341	40.5%	54.0%	0.25 MB
E21	Nimzo-Indian, Three knights variation	646	39.6%	52.5%	0.43 MB
E22	Nimzo-Indian, Spielmann variation	22	59.1%	47.7%	0.02 MB
E23	Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc6	28	42.9%	60.7%	0.02 MB
E24	Nimzo-Indian, Saemisch variation	32	43.8%	28.1%	0.02 MB
E25	Nimzo-Indian, Saemisch variation, Keres variation	127	50.4%	50.4%	0.09 MB
E26	Nimzo-Indian, Saemisch variation, 4. a3 Bxc3+ 5. bxc3 c5 6. e3	32	28.1%	39.1%	0.02 MB
E27	Nimzo-Indian, Saemisch variation, 5...0-0	6	50.0%	41.7%	0.00 MB
E28	Nimzo-Indian, Saemisch variation, 6. e3	17	17.6%	55.9%	0.01 MB
E29	Nimzo-Indian, Saemisch variation, Main line	49	34.7%	50.0%	0.03 MB
E30	Nimzo-Indian, Leningrad variation,	239	34.7%	48.7%	0.15 MB
E31	Nimzo-Indian, Leningrad variation, main line	63	33.3%	54.8%	0.04 MB
E32	Nimzo-Indian, Classical variation	2524	40.1%	53.8%	1.55 MB
E33	Nimzo-Indian, Classical variation, 4...Nc6	134	41.8%	53.0%	0.10 MB
E34	Nimzo-Indian, Classical, Noa variation	252	51.6%	51.6%	0.18 MB
E35	Nimzo-Indian, Classical, Noa variation, 5. cxd5 exd5	117	40.2%	54.3%	0.08 MB
E36	Nimzo-Indian, Classical, Noa variation, 5. a3	30	20.0%	53.3%	0.02 MB
E37	Nimzo-Indian, Classical, Noa variation, Main line, 7.Qc2	45	37.8%	74.4%	0.03 MB
E38	Nimzo-Indian, Classical, 4...c5	164	39.0%	65.9%	0.12 MB
E39	Nimzo-Indian, Classical, Pirc variation	277	40.8%	55.1%	0.18 MB
E40	Nimzo-Indian, 4.e3	92	29.3%	58.2%	0.07 MB
E41	Nimzo-Indian, 4.e3 c5	525	37.3%	52.4%	0.35 MB
E42	Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein)	286	41.3%	50.3%	0.19 MB
E43	Nimzo-Indian, Fischer variation	282	38.7%	54.1%	0.19 MB
E44	Nimzo-Indian, Fischer variation, 5.Ne2	115	36.5%	56.5%	0.08 MB
E45	Nimzo-Indian, 4.e3, Bronstein (Byrne) variation	84	46.4%	58.9%	0.06 MB
E46	Nimzo-Indian, 4.e3 O-O	202	35.1%	50.7%	0.15 MB
E47	Nimzo-Indian, 4.e3 O-O, 5.Bd3	120	50.8%	56.3%	0.09 MB
E48	Nimzo-Indian, 4.e3 O-O, 5.Bd3 d5	153	42.5%	48.7%	0.11 MB
E49	Nimzo-Indian, 4.e3, Botvinnik system	81	43.2%	62.3%	0.06 MB
E50	Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d5	37	40.5%	52.7%	0.03 MB
E51	Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d5	40	55.0%	55.0%	0.03 MB
E52	Nimzo-Indian, 4.e3, Main line with ...b6	141	42.6%	57.4%	0.10 MB
E53	Nimzo-Indian, 4.e3, Main line with ...c5	193	38.9%	56.7%	0.12 MB
E54	Nimzo-Indian, 4.e3, Gligoric system with 7...dc	377	46.7%	57.0%	0.24 MB
E55	Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation	1227	46.7%	54.3%	0.79 MB
E56	Nimzo-Indian, 4.e3, Main line with 7...Nc6	75	48.0%	56.0%	0.05 MB
E57	Nimzo-Indian, 4. e3, Main line with 8...dxc4 and 9...Bxc4 cxd4	5	60.0%	30.0%	0.00 MB
E58	Nimzo-Indian, 4.e3, Main line with 8...Bxc3	613	36.2%	53.2%	0.39 MB
E59	Nimzo-Indian, 4.e3, Main line	631	41.7%	53.0%	0.40 MB
E60	King's Indian defense	1760	37.6%	56.1%	1.25 MB
E61	King's Indian defense, 3.Nc3	295	36.3%	56.1%	0.21 MB
E62	King's Indian, Fianchetto variation	840	35.5%	59.9%	0.56 MB
E63	King's Indian, Fianchetto, Panno variation	1278	36.0%	57.6%	0.83 MB
E64	King's Indian, Fianchetto, Yugoslav system	45	28.9%	61.1%	0.03 MB
E65	King's Indian, Yugoslav, 7.O-O	57	56.1%	52.6%	0.04 MB
E66	King's Indian, Fianchetto, Yugoslav Panno	119	32.8%	56.7%	0.08 MB
E67	King's Indian, Fianchetto with ...Nd7	243	36.6%	56.6%	0.17 MB
E68	King's Indian, Fianchetto, Classical variation, 8.e4	715	37.3%	59.2%	0.46 MB
E69	King's Indian, Fianchetto, Classical Main line	340	31.2%	61.8%	0.21 MB
E70	King's Indian, 4.e4	408	24.5%	59.1%	0.26 MB
E71	King's Indian, Makagonov system (5.h3)	186	26.3%	63.2%	0.14 MB
E72	King's Indian with e4 & g3	15	46.7%	56.7%	0.01 MB
E73	King's Indian, 5.Be2	322	28.6%	53.7%	0.20 MB
E74	King's Indian, Averbakh, 6...c5	41	39.0%	53.7%	0.03 MB
E75	King's Indian, Averbakh, Main line	26	11.5%	51.9%	0.02 MB
E76	King's Indian, Four pawns attack	106	34.9%	58.0%	0.07 MB
E77	King's Indian, Four pawns attack, 6.Be2	47	21.3%	57.4%	0.03 MB
E79	King's Indian, Four pawns attack, Main line	7	14.3%	50.0%	0.01 MB
E80	King's Indian, Saemisch variation	82	35.4%	61.6%	0.07 MB
E81	King's Indian, Saemisch, 5...O-O	648	35.2%	53.2%	0.40 MB
E82	King's Indian, Saemisch, double Fianchetto variation	29	27.6%	58.6%	0.02 MB
E83	King's Indian, Saemisch, 6...Nc6	47	34.0%	53.2%	0.04 MB
E84	King's Indian, Saemisch, Panno Main line	163	36.2%	51.8%	0.10 MB
E85	King's Indian, Saemisch, Orthodox variation	4	25.0%	37.5%	0.00 MB
E86	King's Indian, Saemisch, Orthodox, 7.Nge2 c6	147	29.9%	51.7%	0.09 MB
E87	King's Indian, Saemisch, Orthodox, 7.d5	82	28.0%	55.5%	0.06 MB
E88	King's Indian, Saemisch, Orthodox, 7.d5 c6	140	32.9%	54.3%	0.09 MB
E89	King's Indian, Saemisch, Orthodox Main line	14	42.9%	50.0%	0.01 MB
E90	King's Indian, 5.Nf3	299	32.1%	56.2%	0.21 MB
E91	King's Indian, 6.Be2	402	33.3%	61.7%	0.29 MB
E92	King's Indian, Classical variation	1027	31.9%	55.2%	0.66 MB
E93	King's Indian, Petrosian system, Main line	40	40.0%	55.0%	0.03 MB
E94	King's Indian, Orthodox variation	960	35.8%	57.6%	0.64 MB
E95	King's Indian, Orthodox, 7...Nbd7, 8.Re1	199	36.2%	55.3%	0.14 MB
E96	King's Indian, Orthodox, 7...Nbd7, Main line	36	38.9%	58.3%	0.03 MB
E97	King's Indian, Orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)	3000	33.4%	56.4%	1.84 MB
E98	King's Indian, Orthodox, Aronin-Taimanov, 9.Ne1	663	25.3%	60.6%	0.42 MB
E99	King's Indian, Orthodox, Aronin-Taimanov, Main line	29	17.2%	60.3%	0.02 MB