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	674	38.0%	50.3%	0.44 MB
A01	Nimzovich-Larsen attack	277	31.0%	52.7%	0.19 MB
A02	Bird's Opening	29	27.6%	58.6%	0.02 MB
A03	Bird's Opening	14	50.0%	39.3%	0.01 MB
A04	Reti Opening	2765	36.1%	54.3%	1.73 MB
A05	Reti Opening, 2..Nf6	1473	38.9%	53.5%	0.93 MB
A06	Reti Opening, 2..d5	615	35.0%	50.2%	0.42 MB
A07	Reti Opening, King's Indian attack (Barcza system)	2591	39.8%	52.7%	1.81 MB
A08	Reti Opening, King's Indian attack	375	37.6%	49.5%	0.27 MB
A09	Reti Opening, 2..d5 3.c4	246	40.2%	49.8%	0.17 MB
A10	English Opening	740	42.7%	53.8%	0.48 MB
A11	English, Caro-Kann defensive system	218	42.2%	57.3%	0.14 MB
A12	English, Caro-Kann defensive system	110	38.2%	48.2%	0.08 MB
A13	English Opening	1304	38.9%	53.3%	0.86 MB
A14	English, Neo-Catalan declined	434	41.0%	54.8%	0.28 MB
A15	English, 1...Nf6 (Anglo-Indian defense)	2352	38.9%	53.8%	1.45 MB
A16	English Opening	377	30.8%	54.1%	0.24 MB
A17	English Opening	528	38.1%	56.5%	0.33 MB
A18	English, Mikenas-Carls variation	43	34.9%	61.6%	0.03 MB
A19	English, Mikenas-Carls, Sicilian variation	44	38.6%	60.2%	0.03 MB
A20	English Opening	1679	36.9%	54.4%	1.09 MB
A21	English Opening	673	31.2%	55.4%	0.44 MB
A22	English Opening	777	36.6%	49.8%	0.50 MB
A23	English Opening, Bremen system, Keres variation	60	26.7%	63.3%	0.04 MB
A24	English Opening, Bremen system with 3...g6	16	56.3%	53.1%	0.01 MB
A25	English Opening, Sicilian Reversed	624	34.6%	53.5%	0.41 MB
A26	English Opening, Closed system	183	37.7%	53.3%	0.12 MB
A27	English Opening, Three knights system	75	24.0%	61.3%	0.06 MB
A28	English Opening, Four knights system	1024	38.2%	51.6%	0.67 MB
A29	English Opening, Four knights, kingside Fianchetto	2290	38.1%	52.1%	1.41 MB
A30	English Opening, Symmetrical variation	2467	38.8%	55.7%	1.55 MB
A31	English Opening, Symmetrical, Benoni formation	235	39.1%	58.3%	0.17 MB
A32	English Opening, Symmetrical	63	36.5%	59.5%	0.05 MB
A33	English Opening, Symmetrical	656	42.5%	56.9%	0.43 MB
A34	English Opening, Symmetrical	733	34.5%	54.8%	0.47 MB
A35	English Opening, Symmetrical	686	39.9%	51.9%	0.45 MB
A36	English Opening, Symmetrical	429	31.7%	55.9%	0.28 MB
A37	English Opening, Symmetrical	322	32.3%	52.5%	0.21 MB
A38	English Opening, Symmetrical	304	43.1%	54.4%	0.21 MB
A39	English Opening, Symmetrical, Main line with d4	241	41.9%	58.7%	0.15 MB
A40	Queen's pawn	1675	36.8%	57.2%	1.09 MB
A41	Queen's pawn	792	34.0%	55.1%	0.53 MB
A42	Modern defense, Averbakh system	333	34.5%	64.1%	0.22 MB
A43	Old Benoni defense	342	30.1%	60.1%	0.20 MB
A44	Old Benoni defence	24	37.5%	56.3%	0.02 MB
A45	Queen's pawn game	1172	35.3%	53.5%	0.74 MB
A46	Queen's pawn game	1147	34.1%	53.7%	0.71 MB
A47	Queen's Indian defense	181	35.4%	55.2%	0.13 MB
A48	King's Indian, East Indian defense	746	37.8%	50.0%	0.48 MB
A49	King's Indian, Fianchetto without c4	328	38.1%	58.1%	0.21 MB
A50	Queen's pawn game	220	37.3%	54.1%	0.16 MB
A51	Budapest defense declined	10	0.0%	60.0%	0.01 MB
A52	Budapest defense	180	41.1%	60.0%	0.13 MB
A53	Old Indian defense	282	36.5%	57.6%	0.19 MB
A54	Old Indian, Ukrainian variation	67	46.3%	63.4%	0.06 MB
A55	Old Indian, Main line	132	47.0%	64.4%	0.10 MB
A56	Benoni defense	447	26.2%	61.6%	0.26 MB
A57	Benko gambit	356	31.7%	53.8%	0.23 MB
A58	Benko gambit accepted	215	38.6%	56.5%	0.13 MB
A59	Benko gambit, 7.e4	71	38.0%	57.0%	0.05 MB
A60	Benoni defense	20	30.0%	70.0%	0.02 MB
A61	Benoni defense	448	21.4%	56.0%	0.25 MB
A62	Benoni, Fianchetto variation	118	33.1%	58.1%	0.08 MB
A63	Benoni, Fianchetto variation, 9...Nbd7	20	40.0%	65.0%	0.02 MB
A64	Benoni, Fianchetto variation, 11...Re8	43	34.9%	43.0%	0.03 MB
A65	Benoni, 6.e4	21	19.0%	38.1%	0.01 MB
A67	Benoni, Taimanov variation	19	10.5%	73.7%	0.01 MB
A69	Benoni, Four pawns attack, Main line	14	57.1%	57.1%	0.01 MB
A70	Benoni, Classical with e4 and Nf3	187	34.2%	54.0%	0.12 MB
A71	Benoni, Classical, 8.Bg5	42	14.3%	50.0%	0.03 MB
A72	Benoni, Classical without 9.O-O	20	20.0%	75.0%	0.02 MB
A73	Benoni, Classical, 9.O-O	19	21.1%	73.7%	0.01 MB
A74	Benoni, Classical, 9...a6, 10.a4	2	0.0%	50.0%	0.00 MB
A75	Benoni, Classical with ...a6 and 10...Bg4	22	18.2%	68.2%	0.01 MB
A76	Benoni, Classical, 9...Re8	31	35.5%	56.5%	0.02 MB
A77	Benoni, Classical, 9...Re8, 10.Nd2	59	27.1%	67.8%	0.04 MB
A78	Benoni, Classical with ...Re8 and ...Na6	13	38.5%	50.0%	0.01 MB
A79	Benoni, Classical, 11.f3	27	33.3%	53.7%	0.02 MB
A80	Dutch	459	37.3%	55.4%	0.31 MB
A81	Dutch defense	789	36.5%	56.3%	0.51 MB
A82	Dutch, Staunton gambit	5	40.0%	40.0%	0.00 MB
A83	Dutch, Staunton gambit, Staunton's line	19	42.1%	52.6%	0.01 MB
A84	Dutch defense	250	40.0%	55.6%	0.18 MB
A85	Dutch with 2.c4 & 3.Nc3	58	36.2%	50.9%	0.04 MB
A86	Dutch with 2.c4 & 3.g3	37	48.6%	62.2%	0.03 MB
A87	Dutch, Leningrad, Main variation	106	46.2%	53.3%	0.08 MB
A88	Dutch, Leningrad, Main variation with 7...c6	246	31.3%	59.1%	0.16 MB
A89	Dutch, Leningrad, Main variation with Nc6	153	41.2%	65.7%	0.11 MB
A90	Dutch defense	285	39.3%	60.4%	0.21 MB
A91	Dutch defense	16	37.5%	62.5%	0.01 MB
A92	Dutch defense	55	41.8%	70.0%	0.04 MB
A93	Dutch, Stonewall, Botwinnik variation	32	21.9%	54.7%	0.02 MB
A94	Dutch, Stonewall with Ba3	22	50.0%	65.9%	0.02 MB
A95	Dutch, Stonewall with Nc3	34	26.5%	60.3%	0.03 MB
A96	Dutch, Classical variation	53	30.2%	62.3%	0.05 MB
A97	Dutch, Ilyin-Genevsky variation	41	41.5%	62.2%	0.03 MB
A98	Dutch, Ilyin-Genevsky variation with Qc2	10	40.0%	50.0%	0.01 MB
A99	Dutch, Ilyin-Genevsky variation with b3	44	36.4%	63.6%	0.03 MB
B00	King's pawn Opening	355	34.1%	58.5%	0.25 MB
B01	Scandinavian (centercounter) center defense	500	40.6%	59.1%	0.32 MB
B02	Alekhine's defense	107	43.9%	54.7%	0.08 MB
B03	Alekhine's defense	112	35.7%	58.9%	0.07 MB
B04	Alekhine's defense, Modern variation	164	32.3%	64.9%	0.11 MB
B05	Alekhine's defense, Modern variation, 4...Bg4	170	31.2%	64.4%	0.12 MB
B06	Robatsch (Modern) defense	2339	36.6%	58.5%	1.50 MB
B07	Pirc defense	755	37.0%	58.7%	0.53 MB
B08	Pirc, Classical (Two knights) system	787	36.5%	58.0%	0.53 MB
B09	Pirc, Austrian attack	611	38.6%	60.9%	0.38 MB
B10	Caro-Kann defense	1171	34.0%	56.1%	0.74 MB
B11	Caro-Kann, Two knights, 3...Bg4	164	32.9%	50.0%	0.12 MB
B12	Caro-Kann defense	1863	34.0%	55.6%	1.12 MB
B13	Caro-Kann, Exchange variation	359	45.4%	50.0%	0.24 MB
B14	Caro-Kann, Panov-Botvinnik attack, 5...e6	709	43.2%	52.9%	0.45 MB
B15	Caro-Kann defense	286	31.5%	57.0%	0.19 MB
B16	Caro-Kann, Bronstein-Larsen variation	51	29.4%	59.8%	0.04 MB
B17	Caro-Kann, Steinitz variation	1078	38.0%	53.4%	0.67 MB
B18	Caro-Kann, Classical variation	341	34.9%	54.1%	0.23 MB
B19	Caro-Kann, Classical, 7...Nd7	1262	38.0%	55.6%	0.74 MB
B20	Sicilian defense	612	37.7%	50.9%	0.38 MB
B21	Sicilian, Grand Prix attack	243	37.9%	51.0%	0.15 MB
B22	Sicilian, Alapin's variation (2.c3)	1540	38.0%	54.5%	0.99 MB
B23	Sicilian, Closed	1037	35.7%	53.3%	0.66 MB
B24	Sicilian, Closed	93	30.1%	52.7%	0.06 MB
B25	Sicilian, Closed	151	40.4%	52.6%	0.11 MB
B26	Sicilian, Closed, 6.Be3	95	32.6%	50.0%	0.06 MB
B27	Sicilian defense	2637	40.0%	59.2%	1.70 MB
B28	Sicilian, O'Kelly variation	32	40.6%	51.6%	0.02 MB
B29	Sicilian, Nimzovich-Rubinstein variation	33	24.2%	51.5%	0.02 MB
B30	Sicilian defense	1451	36.3%	56.0%	0.96 MB
B31	Sicilian, Nimzovich-Rossolimo attack (with ...g6, without ...d6)	608	38.0%	55.3%	0.40 MB
B32	Sicilian defense	747	36.9%	58.9%	0.49 MB
B33	Sicilian defense	2091	33.5%	55.5%	1.20 MB
B34	Sicilian, Accelerated Fianchetto, Exchange variation	147	35.4%	54.4%	0.11 MB
B35	Sicilian, Accelerated Fianchetto, Modern variation with Bc4	785	42.8%	52.0%	0.51 MB
B36	Sicilian, Accelerated Fianchetto, Maroczy bind	477	41.9%	58.9%	0.32 MB
B37	Sicilian, Accelerated Fianchetto, Maroczy bind, 5...Bg7	70	52.9%	59.3%	0.05 MB
B38	Sicilian, Accelerated Fianchetto, Maroczy bind, 6.Be3	715	41.8%	57.6%	0.47 MB
B39	Sicilian, Accelerated Fianchetto, Breyer variation	392	38.5%	56.8%	0.26 MB
B40	Sicilian defense	1497	34.6%	55.2%	0.99 MB
B41	Sicilian, Kan variation	161	33.5%	54.0%	0.11 MB
B42	Sicilian, Kan, 5.Bd3	983	35.5%	56.4%	0.64 MB
B43	Sicilian, Kan, 5.Nc3	586	35.3%	55.7%	0.38 MB
B44	Sicilian defense	534	39.3%	50.7%	0.34 MB
B45	Sicilian, Taimanov variation	862	37.5%	57.1%	0.52 MB
B46	Sicilian, Taimanov variation	1332	38.0%	55.0%	0.80 MB
B47	Sicilian, Taimanov (Bastrikov) variation	1938	38.2%	54.6%	1.20 MB
B48	Sicilian, Taimanov variation	1037	34.9%	52.8%	0.64 MB
B49	Sicilian, Taimanov variation	288	40.3%	56.6%	0.20 MB
B50	Sicilian	622	36.0%	55.8%	0.44 MB
B51	Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack	320	41.9%	54.1%	0.22 MB
B52	Sicilian, Canal-Sokolsky attack, 3...Bd7	454	40.3%	53.2%	0.29 MB
B53	Sicilian, Chekhover variation	147	35.4%	53.1%	0.10 MB
B54	Sicilian	398	35.4%	55.2%	0.28 MB
B55	Sicilian, Prins variation, Venice attack	9	44.4%	66.7%	0.01 MB
B56	Sicilian	472	35.6%	53.0%	0.30 MB
B57	Sicilian, Sozin (not Scheveningen)	571	38.2%	49.6%	0.38 MB
B58	Sicilian, Classical	287	36.6%	46.9%	0.18 MB
B59	Sicilian, Boleslavsky variation, 7.Nb3	32	25.0%	50.0%	0.02 MB
B60	Sicilian, Richter-Rauzer	105	27.6%	59.5%	0.07 MB
B61	Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2	117	31.6%	56.8%	0.08 MB
B62	Sicilian, Richter-Rauzer, 6...e6	87	32.2%	50.6%	0.07 MB
B63	Sicilian, Richter-Rauzer, Rauzer attack	440	29.8%	55.8%	0.27 MB
B64	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f4	176	39.8%	50.0%	0.12 MB
B65	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4	266	37.6%	59.0%	0.16 MB
B66	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6	4069	32.3%	51.6%	2.27 MB
B67	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd7	1242	30.6%	55.0%	0.73 MB
B68	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7	48	35.4%	63.5%	0.04 MB
B69	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf6	77	32.5%	63.0%	0.05 MB
B70	Sicilian, Dragon variation	184	35.9%	49.5%	0.13 MB
B71	Sicilian, Dragon, Levenfish variation	7	28.6%	57.1%	0.01 MB
B72	Sicilian, Dragon, 6.Be3	54	37.0%	48.1%	0.04 MB
B73	Sicilian, Dragon, Classical, 8.O-O	137	42.3%	54.0%	0.10 MB
B74	Sicilian, Dragon, Classical, 9.Nb3	115	39.1%	56.1%	0.09 MB
B75	Sicilian, Dragon, Yugoslav attack	63	34.9%	63.5%	0.04 MB
B76	Sicilian, Dragon, Yugoslav attack, 7...O-O	339	26.5%	63.7%	0.20 MB
B77	Sicilian, Dragon, Yugoslav attack, 9.Bc4	126	40.5%	57.5%	0.08 MB
B78	Sicilian, Dragon, Yugoslav attack, 10.O-O-O	93	23.7%	49.5%	0.06 MB
B79	Sicilian, Dragon, Yugoslav attack, 12.h4	9	22.2%	55.6%	0.01 MB
B80	Sicilian, Scheveningen variation	604	31.6%	52.7%	0.36 MB
B81	Sicilian, Scheveningen, Keres attack	995	30.3%	61.3%	0.56 MB
B82	Sicilian, Scheveningen, 6.f4	204	31.4%	59.8%	0.13 MB
B83	Sicilian, Scheveningen, 6.Be2	655	39.8%	52.9%	0.44 MB
B84	Sicilian, Scheveningen (Paulsen), Classical variation	1893	36.3%	49.9%	1.16 MB
B85	Sicilian, Scheveningen, Classical variation with ...Qc7 and ...Nc6	299	40.8%	54.2%	0.20 MB
B86	Sicilian, Sozin attack	37	35.1%	44.6%	0.03 MB
B87	Sozin with ...a6 and ...b5	408	35.8%	53.4%	0.26 MB
B88	Sicilian, Sozin, Leonhardt variation	230	40.0%	57.8%	0.14 MB
B89	Sicilian, Sozin, 7.Be3	911	30.7%	51.3%	0.53 MB
B90	Sicilian, Najdorf	7522	30.7%	52.9%	4.20 MB
B91	Sicilian, Najdorf, Zagreb (Fianchetto) variation	123	35.0%	54.9%	0.08 MB
B92	Sicilian, Najdorf, Zagreb (Fianchetto) variation	1421	37.8%	52.3%	0.91 MB
B93	Sicilian, Najdorf, 6.f4	552	40.8%	51.0%	0.34 MB
B94	Sicilian, Najdorf, 6.Bg5	50	24.0%	62.0%	0.03 MB
B95	Sicilian, Najdorf, 6...e6	74	29.7%	40.5%	0.05 MB
B96	Sicilian, Najdorf, 7.f4	187	36.9%	45.2%	0.13 MB
B97	Sicilian, Najdorf, 7...Qb6	936	36.6%	47.0%	0.50 MB
B98	Sicilian, Najdorf, 7...Be7	154	33.8%	58.4%	0.09 MB
B99	Sicilian, Najdorf, 7...Be7 Main line	339	24.5%	54.4%	0.18 MB
C00	French defense	1694	37.8%	50.4%	1.13 MB
C01	French, Exchange variation	450	39.1%	53.3%	0.31 MB
C02	French, Advance variation	1022	32.4%	53.8%	0.64 MB
C03	French, Tarrasch	480	39.0%	58.2%	0.33 MB
C04	French, Tarrasch, Guimard Main line	69	18.8%	57.2%	0.05 MB
C05	French, Tarrasch, Closed variation	306	31.7%	57.4%	0.19 MB
C06	French, Tarrasch, Closed variation, Main line	568	36.8%	60.3%	0.35 MB
C07	French, Tarrasch, Open variation	1034	47.1%	51.7%	0.66 MB
C08	French, Tarrasch, Open, 4.exd5 exd5	488	49.6%	54.3%	0.31 MB
C09	French, Tarrasch, Open variation, Main line	495	46.7%	57.7%	0.33 MB
C10	French, Paulsen variation	979	37.2%	53.7%	0.59 MB
C11	French defense	2410	36.5%	55.5%	1.43 MB
C12	French, MacCutcheon variation	321	29.3%	55.1%	0.20 MB
C13	French, Classical	64	28.1%	59.4%	0.05 MB
C14	French, Classical variation	171	35.7%	57.6%	0.11 MB
C15	French, Winawer (Nimzovich) variation	228	38.6%	53.1%	0.16 MB
C16	French, Winawer, Advance variation	285	33.7%	57.5%	0.18 MB
C17	French, Winawer, Advance variation	330	30.9%	55.5%	0.20 MB
C18	French, Winawer, Advance variation	118	26.3%	58.1%	0.08 MB
C19	French, Winawer, Advance, 6...Ne7	1934	30.1%	59.3%	1.21 MB
C20	King's pawn game	12	25.0%	54.2%	0.01 MB
C21	center game	64	45.3%	71.1%	0.05 MB
C22	center game	79	26.6%	66.5%	0.05 MB
C23	Bishop's Opening	160	37.5%	58.8%	0.10 MB
C24	Bishop's Opening, Berlin defense	155	35.5%	52.6%	0.11 MB
C25	Vienna game	132	34.8%	59.1%	0.09 MB
C26	Vienna, Falkbeer variation	143	37.1%	53.5%	0.10 MB
C27	Vienna game	20	30.0%	45.0%	0.02 MB
C28	Vienna game	61	34.4%	45.1%	0.05 MB
C29	Vienna gambit, Kaufmann variation	39	33.3%	60.3%	0.03 MB
C30	King's gambit	29	34.5%	65.5%	0.02 MB
C31	KGD, Falkbeer counter-gambit	5	80.0%	60.0%	0.00 MB
C32	KGD, Falkbeer, 5. dxe4	1	0.0%	100.0%	0.00 MB
C33	King's gambit accepted	37	37.8%	45.9%	0.03 MB
C34	King's knight's gambit	20	30.0%	60.0%	0.01 MB
C35	KGA, Cunningham defense	7	14.3%	50.0%	0.01 MB
C36	KGA, Abbazia defense (Classical defense, Modern defense)	13	23.1%	65.4%	0.01 MB
C37	KGA, Quaade gambit	4	75.0%	37.5%	0.01 MB
C38	King's knight's gambit	5	0.0%	0.0%	0.00 MB
C39	King's knight's gambit	33	27.3%	31.8%	0.02 MB
C40	King's knight Opening	45	35.6%	64.4%	0.03 MB
C41	Philidor's defense	355	37.7%	56.1%	0.24 MB
C42	Petrov's defense	2190	39.7%	57.3%	1.34 MB
C43	Petrov, Modern (Steinitz) attack	677	40.0%	52.4%	0.41 MB
C44	King's pawn game	239	36.4%	48.7%	0.17 MB
C45	Scotch game	1679	39.5%	52.5%	1.02 MB
C46	Three knights game	264	44.7%	48.9%	0.18 MB
C47	Four knights, Scotch variation	142	47.9%	54.9%	0.10 MB
C48	Four knights, Spanish variation	438	40.4%	55.8%	0.29 MB
C49	Four knights, double Ruy Lopez	337	39.2%	55.2%	0.24 MB
C50	King's pawn game	766	37.5%	53.3%	0.50 MB
C51	Evans gambit declined	137	35.8%	45.6%	0.08 MB
C52	Evans gambit	45	35.6%	48.9%	0.03 MB
C53	Giuoco piano	838	35.7%	55.7%	0.54 MB
C54	Guioco piano	50	46.0%	43.0%	0.03 MB
C55	Two knights defense	376	36.2%	58.2%	0.25 MB
C56	Two knights defense	30	53.3%	46.7%	0.02 MB
C57	Two knights defense	11	18.2%	45.5%	0.01 MB
C58	Two knights defense	33	36.4%	63.6%	0.03 MB
C59	Two knights defense	323	31.9%	51.5%	0.19 MB
C60	Ruy Lopez	93	35.5%	52.2%	0.07 MB
C61	Ruy Lopez, Bird's defense	29	34.5%	58.6%	0.02 MB
C62	Ruy Lopez, Old Steinitz defence	132	26.5%	55.7%	0.10 MB
C63	Ruy Lopez, Schilemann defense	42	26.2%	58.3%	0.03 MB
C64	Ruy Lopez, Classical (Cordel) defence	306	35.3%	55.9%	0.20 MB
C65	Ruy Lopez, Berlin defense	423	32.2%	50.4%	0.30 MB
C66	Ruy Lopez, Berlin defence, 4.O-O, d6	224	52.7%	55.8%	0.15 MB
C67	Ruy Lopez, Berlin defence, Open variation	976	42.1%	53.2%	0.61 MB
C68	Ruy Lopez, Exchange variation	64	57.8%	47.7%	0.05 MB
C69	Ruy Lopez, Exchange variation, 5.O-O	465	32.7%	56.8%	0.30 MB
C70	Ruy Lopez,	174	36.8%	60.3%	0.13 MB
C71	Ruy Lopez, Modern Steinitz defense	78	37.2%	53.2%	0.06 MB
C72	Ruy Lopez, Modern Steinitz defense 5.0-0	102	41.2%	59.8%	0.07 MB
C73	Ruy Lopez, Modern Steinitz defense, Richter variation	67	37.3%	56.0%	0.05 MB
C74	Ruy Lopez, Modern Steinitz defense	40	30.0%	55.0%	0.03 MB
C75	Ruy Lopez, Modern Steinitz defense	54	38.9%	56.5%	0.04 MB
C76	Ruy Lopez, Modern Steinitz defense, Fianchetto (Bronstein) variation	119	35.3%	54.6%	0.09 MB
C77	Ruy Lopez, Morphy defence	355	41.4%	55.4%	0.26 MB
C78	Ruy Lopez, 5.O-O	796	39.1%	57.0%	0.50 MB
C79	Ruy Lopez, Steinitz defense deferred (Russian defence)	125	36.8%	53.6%	0.09 MB
C80	Ruy Lopez, Open (Tarrasch) defence	616	35.9%	54.3%	0.37 MB
C81	Ruy Lopez, Open, Howell attack	22	40.9%	47.7%	0.02 MB
C82	Ruy Lopez, Open, 9.c3	98	35.7%	57.7%	0.06 MB
C83	Ruy Lopez, Open, Classical defence	70	42.9%	54.3%	0.05 MB
C84	Ruy Lopez, Closed defense	544	39.3%	52.6%	0.34 MB
C85	Ruy Lopez, Exchange variation doubly deferred (DERLD)	543	35.7%	49.4%	0.35 MB
C86	Worrall attack	95	35.8%	55.8%	0.07 MB
C87	Ruy Lopez, Closed, Averbach variation	113	35.4%	60.2%	0.08 MB
C88	Ruy Lopez, Closed	2097	36.0%	53.1%	1.33 MB
C89	Ruy Lopez, Marshall counter-attack	328	40.2%	54.6%	0.21 MB
C90	Ruy Lopez, closed (with ...d6)	1041	34.3%	50.5%	0.70 MB
C91	Ruy Lopez, closed, 9.d4	2489	37.3%	54.9%	1.61 MB
C92	Ruy Lopez, closed, 9.d4	1848	39.1%	56.3%	1.14 MB
C93	Ruy Lopez, closed, Smyslov defense	72	43.1%	56.3%	0.05 MB
C94	Ruy Lopez, Closed, Breyer defense	18	33.3%	61.1%	0.02 MB
C95	Ruy Lopez, closed, Breyer, 10.d4	618	39.0%	57.0%	0.41 MB
C96	Ruy Lopez, closed, 8...Na5	454	33.7%	60.0%	0.31 MB
C97	Ruy Lopez, Closed, Chigorin defense	519	31.6%	63.8%	0.35 MB
C98	Ruy Lopez, Closed, Chigorin, 12...Nc6	148	31.1%	60.8%	0.11 MB
C99	Ruy Lopez, Closed, Chigorin, 12...c5d4	867	40.4%	62.7%	0.55 MB
D00	Queen's pawn game	540	37.2%	50.8%	0.35 MB
D01	Richter-Veresov attack	94	33.0%	41.0%	0.06 MB
D02	Queen's pawn game, 2. Nf3	2502	36.5%	52.6%	1.61 MB
D03	Torre attack, Tartakower variation	94	38.3%	48.9%	0.07 MB
D04	Queen's pawn game	173	35.8%	49.1%	0.13 MB
D05	Queen's pawn game, Zukertort variation	184	33.2%	54.6%	0.12 MB
D06	Queen's Gambit	67	41.8%	62.7%	0.05 MB
D07	QGD; Chigorin defense	371	34.5%	57.7%	0.22 MB
D08	QGD; Albin counter-gambit	3	33.3%	50.0%	0.00 MB
D09	QGD; Albin counter-gambit, 5.g3	4	25.0%	37.5%	0.01 MB
D10	QGD; Slav defense	1203	35.7%	52.9%	0.79 MB
D11	QGD; Slav defense, 3.Nf3	758	36.5%	55.9%	0.51 MB
D12	QGD; Slav defense, 4.e3 Bf5	714	37.4%	52.6%	0.47 MB
D13	QGD; Slav defense, Exchange variation	237	40.1%	58.0%	0.15 MB
D14	QGD; Slav defense, Exchange variation	229	42.8%	49.8%	0.14 MB
D15	QGD; Slav accepted, Exchange variation, 6.Bf4 Bf5	726	35.8%	53.0%	0.49 MB
D16	QGD; Slav accepted, Alapin variation	104	28.8%	67.3%	0.07 MB
D17	QGD; Slav defense, Czech defence	625	38.1%	56.2%	0.38 MB
D18	QGD; Dutch variation	44	36.4%	54.5%	0.03 MB
D19	QGD; Dutch variation	657	37.7%	57.7%	0.41 MB
D20	Queen's Gambit accepted	835	38.2%	58.7%	0.53 MB
D21	QGA, 3.Nf3	110	37.3%	56.8%	0.07 MB
D22	QGA; Alekhine defense	42	45.2%	56.0%	0.03 MB
D23	Queen's gambit accepted	39	35.9%	46.2%	0.03 MB
D24	QGA, 4.Nc3	81	43.2%	54.9%	0.05 MB
D25	QGA, 4.e3	172	42.4%	59.0%	0.12 MB
D26	QGA; classical variation	489	49.7%	52.0%	0.32 MB
D27	QGA; classical variation	1745	45.8%	54.8%	1.08 MB
D28	QGA; Classical variation 7.Qe2	68	36.8%	61.0%	0.05 MB
D29	QGA; Classical variation 8...Bb7	158	38.6%	44.6%	0.11 MB
D30	QGD	2055	40.6%	55.3%	1.29 MB
D31	QGD, 3.Nc3	640	38.3%	52.4%	0.44 MB
D32	QGD; Tarrasch defense	120	45.8%	56.3%	0.09 MB
D33	QGD; Tarrasch, Schlechter-Rubinstein system	50	46.0%	57.0%	0.04 MB
D34	QGD; Tarrasch, 7...Be7	637	45.4%	55.3%	0.41 MB
D35	QGD; 3...Nf6	484	39.7%	53.9%	0.31 MB
D36	QGD; Exchange, positional line, 6.Qc2	42	40.5%	46.4%	0.03 MB
D37	QGD; 4.Nf3	2241	41.4%	54.8%	1.38 MB
D38	QGD; Ragozin variation	803	42.8%	51.4%	0.52 MB
D39	QGD; Ragozin, Vienna variation	673	48.7%	52.5%	0.38 MB
D40	QGD; Semi-Tarrasch defense	195	42.6%	52.6%	0.14 MB
D41	QGD; Semi-Tarrasch, 5.cd	229	43.2%	59.2%	0.14 MB
D42	QGD; Semi-Tarrasch, 7.Bd3	104	38.5%	58.7%	0.08 MB
D43	QGD; Semi-Slav	2047	36.7%	54.0%	1.26 MB
D44	QGD; Semi-Slav 5.Bg5 dc	556	33.5%	56.3%	0.28 MB
D45	QGD; Semi-Slav 5.e3	6155	40.3%	52.5%	3.73 MB
D46	QGD; Semi-Slav 6.Bd3	350	39.7%	57.6%	0.23 MB
D47	QGD; Semi-Slav 7.Bc4	4960	36.0%	54.6%	2.91 MB
D48	QGD; Meran, 8...a6	1015	38.2%	51.8%	0.61 MB
D49	QGD; Meran, 11. Nxb5	389	40.4%	47.9%	0.22 MB
D50	QGD; 4.Bg5	31	35.5%	46.8%	0.02 MB
D51	QGD; 4.Bg5 Nbd7	40	40.0%	60.0%	0.03 MB
D52	QGD	324	45.1%	52.2%	0.22 MB
D53	QGD; 4.Bg5 Be7	71	32.4%	48.6%	0.05 MB
D54	QGD; Anti-neo-Orthodox variation	14	35.7%	46.4%	0.01 MB
D55	QGD; 6.Nf3	396	46.2%	53.4%	0.25 MB
D56	QGD; Lasker defense	142	33.1%	51.8%	0.10 MB
D57	QGD; Lasker defense, Main line	19	68.4%	50.0%	0.01 MB
D58	QGD; Tartakower (Makagonov-Bondarevsky) system	3282	44.4%	51.9%	2.10 MB
D59	QGD; Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5	142	43.7%	44.4%	0.09 MB
D60	QGD; Orthodox defense	52	32.7%	58.7%	0.04 MB
D61	QGD; Orthodox defense, Rubinstein variation	93	45.2%	49.5%	0.07 MB
D62	QGD; Orthodox defense, 7.Qc2 c5, 8.cd (Rubinstein)	64	51.6%	58.6%	0.04 MB
D63	QGD; Orthodox defense, 7.Rc1	222	39.6%	54.5%	0.15 MB
D64	QGD; Orthodox defense, Rubinstein attack (with Rc1)	68	42.6%	50.7%	0.05 MB
D65	QGD; Orthodox defense, Rubinstein attack, Main line	1	0.0%	100.0%	0.00 MB
D66	QGD; Orthodox defense, Bd3 line	104	37.5%	63.0%	0.08 MB
D67	QGD; Orthodox defense, Bd3 line, Capablanca freeing manoever	85	42.4%	56.5%	0.06 MB
D68	QGD; Orthodox defense, Classical variation	103	49.5%	55.8%	0.07 MB
D69	QGD; Orthodox defense, Classical, 13.dxe5	21	57.1%	47.6%	0.01 MB
D70	Neo-Gruenfeld defense	30	33.3%	50.0%	0.02 MB
D71	Neo-Gruenfeld, 5.cd	47	44.7%	58.5%	0.03 MB
D72	Neo-Gruenfeld, 5.cd, Main line	41	29.3%	56.1%	0.03 MB
D73	Neo-Gruenfeld, 5.Nf3	166	52.4%	57.5%	0.13 MB
D74	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O	40	37.5%	53.8%	0.03 MB
D75	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3	28	35.7%	57.1%	0.02 MB
D76	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb6	185	37.8%	55.7%	0.13 MB
D77	Neo-Gruenfeld, 6.O-O	204	48.5%	54.7%	0.14 MB
D78	Neo-Gruenfeld, 6.O-O c6	332	41.3%	54.4%	0.21 MB
D79	Neo-Gruenfeld, 6.O-O, Main line	121	47.1%	45.9%	0.09 MB
D80	Gruenfeld defense	147	37.4%	59.5%	0.10 MB
D81	Gruenfeld; Russian variation	10	50.0%	65.0%	0.01 MB
D82	Gruenfeld 4.Bf4	163	40.5%	57.1%	0.11 MB
D83	Gruenfeld gambit	34	47.1%	64.7%	0.03 MB
D84	Gruenfeld gambit accepted	13	53.8%	57.7%	0.01 MB
D85	Gruenfeld, exchange variation	1726	46.9%	53.9%	1.05 MB
D86	Gruenfeld, Exchange, Classical variation	258	45.0%	54.3%	0.17 MB
D87	Gruenfeld, Exchange, Spassky variation	203	41.4%	57.1%	0.13 MB
D88	Gruenfeld, Spassky variation, Main line, 10...cd, 11.cd	52	38.5%	61.5%	0.04 MB
D89	Gruenfeld, Spassky variation, Main line, 13.Bd3	68	35.3%	47.1%	0.04 MB
D90	Gruenfeld, Three knights variation	106	34.0%	52.8%	0.07 MB
D91	Gruenfeld, Three knights variation	417	36.0%	48.2%	0.29 MB
D92	Gruenfeld, 5.Bf4	199	46.2%	55.8%	0.13 MB
D93	Gruenfeld with 5. Bf4 O-O 6. e3	94	48.9%	55.3%	0.07 MB
D94	Gruenfeld, 5.e3	298	46.6%	54.9%	0.21 MB
D95	Gruenfeld with 5. e3 O-O 6. Qb3	13	38.5%	57.7%	0.01 MB
D96	Gruenfeld, Russian variation	38	36.8%	60.5%	0.03 MB
D97	Gruenfeld, Russian variation with 7. e4	958	40.8%	52.9%	0.60 MB
D98	Gruenfeld, Russian, Smyslov variation	114	39.5%	61.8%	0.08 MB
D99	Gruenfeld defense, Smyslov, Main line	107	43.9%	54.7%	0.07 MB
E00	Queen's pawn game	1107	36.1%	53.8%	0.73 MB
E01	Catalan, closed	58	32.8%	54.3%	0.05 MB
E02	Catalan, open, 5.Qa4	31	38.7%	64.5%	0.02 MB
E03	Catalan, open, Alekhine variation	5	100.0%	50.0%	0.01 MB
E04	Catalan, Open, 5.Nf3	1009	40.8%	51.9%	0.62 MB
E05	Catalan, Open, Classical line	36	27.8%	52.8%	0.03 MB
E06	Catalan, Closed, 5.Nf3	859	45.6%	53.3%	0.55 MB
E07	Catalan, Closed, 6...Nbd7	41	41.5%	47.6%	0.03 MB
E08	Catalan, Closed, 7.Qc2	90	36.7%	52.8%	0.06 MB
E09	Catalan, Closed, Main line	65	32.3%	65.4%	0.05 MB
E10	Queen's pawn game 3. Nf3	1111	41.1%	57.1%	0.72 MB
E11	Bogo-Indian defense	1269	35.3%	55.1%	0.79 MB
E12	Queen's Indian defense	3968	37.0%	53.0%	2.45 MB
E13	Queen's Indian, 4.Nc3, Main line	54	33.3%	53.7%	0.04 MB
E14	Queen's Indian, 4.e3	587	37.3%	54.8%	0.39 MB
E15	Queen's Indian, 4.g3	8010	36.2%	56.5%	4.89 MB
E16	Queen's Indian, Capablanca variation	222	33.3%	57.2%	0.15 MB
E17	Queen's Indian, 5.Bg2 Be7	430	41.2%	55.5%	0.27 MB
E18	Queen's Indian, Old Main line, 7.Nc3	724	42.1%	57.8%	0.43 MB
E19	Queen's Indian, Old Main line, 9.Qxc3	481	39.9%	59.3%	0.31 MB
E20	Nimzo-Indian defense	266	35.0%	55.8%	0.18 MB
E21	Nimzo-Indian, Three knights variation	544	38.6%	51.8%	0.36 MB
E22	Nimzo-Indian, Spielmann variation	17	64.7%	55.9%	0.01 MB
E23	Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc6	17	47.1%	52.9%	0.01 MB
E24	Nimzo-Indian, Saemisch variation	29	48.3%	31.0%	0.02 MB
E25	Nimzo-Indian, Saemisch variation, Keres variation	111	49.5%	50.9%	0.08 MB
E26	Nimzo-Indian, Saemisch variation, 4. a3 Bxc3+ 5. bxc3 c5 6. e3	27	29.6%	37.0%	0.02 MB
E27	Nimzo-Indian, Saemisch variation, 5...0-0	3	33.3%	16.7%	0.00 MB
E28	Nimzo-Indian, Saemisch variation, 6. e3	15	20.0%	56.7%	0.01 MB
E29	Nimzo-Indian, Saemisch variation, Main line	38	34.2%	51.3%	0.02 MB
E30	Nimzo-Indian, Leningrad variation,	204	34.3%	49.0%	0.13 MB
E31	Nimzo-Indian, Leningrad variation, main line	49	30.6%	58.2%	0.03 MB
E32	Nimzo-Indian, Classical variation	2278	39.5%	53.6%	1.39 MB
E33	Nimzo-Indian, Classical variation, 4...Nc6	122	42.6%	54.1%	0.09 MB
E34	Nimzo-Indian, Classical, Noa variation	216	51.9%	50.5%	0.14 MB
E35	Nimzo-Indian, Classical, Noa variation, 5. cxd5 exd5	106	40.6%	55.2%	0.07 MB
E36	Nimzo-Indian, Classical, Noa variation, 5. a3	25	20.0%	54.0%	0.02 MB
E37	Nimzo-Indian, Classical, Noa variation, Main line, 7.Qc2	33	33.3%	77.3%	0.02 MB
E38	Nimzo-Indian, Classical, 4...c5	132	42.4%	62.1%	0.10 MB
E39	Nimzo-Indian, Classical, Pirc variation	235	40.4%	56.0%	0.16 MB
E40	Nimzo-Indian, 4.e3	73	28.8%	56.8%	0.05 MB
E41	Nimzo-Indian, 4.e3 c5	439	36.7%	51.1%	0.29 MB
E42	Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein)	272	41.2%	50.4%	0.18 MB
E43	Nimzo-Indian, Fischer variation	236	39.0%	53.4%	0.15 MB
E44	Nimzo-Indian, Fischer variation, 5.Ne2	106	36.8%	55.2%	0.07 MB
E45	Nimzo-Indian, 4.e3, Bronstein (Byrne) variation	83	47.0%	58.4%	0.06 MB
E46	Nimzo-Indian, 4.e3 O-O	184	35.9%	50.5%	0.13 MB
E47	Nimzo-Indian, 4.e3 O-O, 5.Bd3	92	50.0%	59.8%	0.06 MB
E48	Nimzo-Indian, 4.e3 O-O, 5.Bd3 d5	122	40.2%	50.4%	0.08 MB
E49	Nimzo-Indian, 4.e3, Botvinnik system	68	45.6%	59.6%	0.05 MB
E50	Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d5	31	38.7%	54.8%	0.03 MB
E51	Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d5	30	56.7%	58.3%	0.02 MB
E52	Nimzo-Indian, 4.e3, Main line with ...b6	124	41.1%	56.0%	0.09 MB
E53	Nimzo-Indian, 4.e3, Main line with ...c5	151	39.7%	59.6%	0.10 MB
E54	Nimzo-Indian, 4.e3, Gligoric system with 7...dc	316	44.3%	57.3%	0.20 MB
E55	Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation	1150	46.6%	54.3%	0.74 MB
E56	Nimzo-Indian, 4.e3, Main line with 7...Nc6	69	47.8%	55.8%	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	537	35.8%	53.3%	0.34 MB
E59	Nimzo-Indian, 4.e3, Main line	608	41.8%	52.8%	0.38 MB
E60	King's Indian defense	1438	36.9%	56.5%	1.01 MB
E61	King's Indian defense, 3.Nc3	260	33.5%	56.0%	0.19 MB
E62	King's Indian, Fianchetto variation	645	35.3%	59.8%	0.42 MB
E63	King's Indian, Fianchetto, Panno variation	1181	35.2%	57.5%	0.77 MB
E64	King's Indian, Fianchetto, Yugoslav system	39	25.6%	66.7%	0.03 MB
E65	King's Indian, Yugoslav, 7.O-O	45	57.8%	51.1%	0.03 MB
E66	King's Indian, Fianchetto, Yugoslav Panno	92	32.6%	56.5%	0.06 MB
E67	King's Indian, Fianchetto with ...Nd7	202	35.6%	56.4%	0.14 MB
E68	King's Indian, Fianchetto, Classical variation, 8.e4	632	37.0%	59.5%	0.40 MB
E69	King's Indian, Fianchetto, Classical Main line	315	31.7%	63.2%	0.20 MB
E70	King's Indian, 4.e4	326	25.5%	61.8%	0.21 MB
E71	King's Indian, Makagonov system (5.h3)	135	25.2%	63.0%	0.10 MB
E72	King's Indian with e4 & g3	11	45.5%	59.1%	0.01 MB
E73	King's Indian, 5.Be2	240	27.9%	54.4%	0.15 MB
E74	King's Indian, Averbakh, 6...c5	33	39.4%	53.0%	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	90	36.7%	58.3%	0.06 MB
E77	King's Indian, Four pawns attack, 6.Be2	45	22.2%	57.8%	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	60	31.7%	64.2%	0.05 MB
E81	King's Indian, Saemisch, 5...O-O	535	34.8%	53.6%	0.33 MB
E82	King's Indian, Saemisch, double Fianchetto variation	27	29.6%	55.6%	0.02 MB
E83	King's Indian, Saemisch, 6...Nc6	40	35.0%	50.0%	0.03 MB
E84	King's Indian, Saemisch, Panno Main line	150	35.3%	51.7%	0.10 MB
E85	King's Indian, Saemisch, Orthodox variation	2	50.0%	25.0%	0.00 MB
E86	King's Indian, Saemisch, Orthodox, 7.Nge2 c6	119	28.6%	50.4%	0.07 MB
E87	King's Indian, Saemisch, Orthodox, 7.d5	74	27.0%	54.1%	0.05 MB
E88	King's Indian, Saemisch, Orthodox, 7.d5 c6	121	30.6%	55.0%	0.08 MB
E89	King's Indian, Saemisch, Orthodox Main line	12	41.7%	45.8%	0.01 MB
E90	King's Indian, 5.Nf3	257	33.1%	56.6%	0.18 MB
E91	King's Indian, 6.Be2	319	32.3%	62.5%	0.22 MB
E92	King's Indian, Classical variation	847	31.3%	55.4%	0.55 MB
E93	King's Indian, Petrosian system, Main line	33	36.4%	54.5%	0.03 MB
E94	King's Indian, Orthodox variation	828	35.1%	57.8%	0.55 MB
E95	King's Indian, Orthodox, 7...Nbd7, 8.Re1	177	36.2%	55.4%	0.12 MB
E96	King's Indian, Orthodox, 7...Nbd7, Main line	33	33.3%	56.1%	0.02 MB
E97	King's Indian, Orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)	2783	32.7%	56.3%	1.70 MB
E98	King's Indian, Orthodox, Aronin-Taimanov, 9.Ne1	624	25.2%	61.0%	0.40 MB
E99	King's Indian, Orthodox, Aronin-Taimanov, Main line	30	16.7%	61.7%	0.02 MB