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» polgar sofia » giardelli sergio » wojtkiewicz alek » adams michael en » uhlmann wolfgang » rinko 11 » basman michael » ilincic zlatko » glek igor v
» polgar sofia » junior » espig lutz » miladinovic igor » deep fritz » sawyer t » hossa » speelman jonatha » berry jonathan
» arkell keith c » uhlmann wolfgang » carlsen magnus » hickl j » shredder » luther thomas » sandkatack deep » gleizerov evgeny » mozes ervin
» galdunts sergey » cech pavel » anand viswanatha

number of chess games per ECO file

ECO Code:	Number of Games	Chess Opening Name	Times Downloaded
A00	136026	Irregular Openings	814
A01	15331	Larsens Opening	185
A02	12071	Birds Opening	190
A03	10704	Birds Opening, 1...d5	130
A04	56422	Reti Opening, Ziegler Variant	113
A05	101322	Reti Opening, 2...Nf6	112
A06	31605	Reti Opening, 2...d5	93
A07	20234	Reti Opening, Kings Indian attack Barcza system	126
A08	2467	Reti Opening, Kings Indian attack	135
A09	22753	Reti Opening, 2...d5 3.c4	96
A10	31835	English Opening	129
A11	8719	English, Caro-Kann defensive system	100
A12	654	English, Caro-Kann defensive system	115
A13	19752	English Opening	120
A14	435	English, Neo-Catalan declined	120
A15	29676	English, 1...Nf6 Anglo-Indian defense	112
A16	41408	English Opening	131
A17	5500	English Opening, Hedgehog Defense	82
A18	2596	English, Mikenas-Carls variation	129
A19	1131	English, Mikenas-Carls, Sicilian variation	137
A20	14007	English Opening	89
A21	7546	English Opening	98
A22	15474	English Opening	86
A23	1212	English Opening, Bremen system, Keres variation	95
A24	299	English Opening, Bremen system with 3...g6	110
A25	5495	English Opening, Sicilian Reversed	79
A26	758	English Opening, Closed system	91
A27	1991	English Opening, Three knights system	112
A28	717	English Opening, Four knights system	103
A29	676	English Opening, Four knights, kingside Fianchetto	100
A30	10480	English Opening, Symmetrical variation	92
A31	430	English Opening, Symmetrical, Benoni formation	87
A32	116	English Opening, Symmetrical	83
A33	4619	English Opening, Symmetrical	70
A34	4498	English Opening, Symmetrical	102
A35	1756	English Opening, Symmetrical	103
A36	2200	English Opening, Symmetrical	109
A37	513	English Opening, Symmetrical	86
A38	175	English Opening, Symmetrical	100
A39	146	English Opening, Symmetrical, Main line with d4	76
A40	73076	Queens Pawn Game	102
A41	12413	Queens Pawn Game	77
A42	6103	Modern defense, Averbakh system	103
A43	9328	Old Benoni defense	71
A44	3185	Old Benoni defense	104
A45	51255	Queens Pawn Game	117
A46	58211	Queens Pawn Game	89
A47	3132	Queens Indian Defense	79
A48	38204	Kings Indian, East Indian defense	98
A49	7469	Kings Indian, Fianchetto without c4	77
A50	6515	Queens Pawn Game	84
A51	2653	Budapest Defense declined	214
A52	6982	Budapest defense	114
A53	8923	Old Indian Defense	91
A54	699	Old Indian, Ukrainian variation	75
A55	367	Old Indian, Main line	103
A56	17198	Benoni Defense	88
A57	13189	Benko gambit	82
A58	5539	Benko gambit accepted	86
A59	611	Benko gambit, 7.e4	172
A60	3975	Benoni defense	112
A61	3341	Benoni defense	107
A62	265	Benoni, Fianchetto variation	125
A63	106	Benoni, Fianchetto variation, 9...Nbd7	100
A64	56	Benoni, Fianchetto variation, 11...Re8	95
A65	2393	Benoni, 6.e4	67
A66	307	Benoni, pawn storm variation	93
A67	1648	Benoni, Taimanov variation	92
A68	284	Benoni, Four pawns attack	88
A69	177	Benoni, Four pawns attack, Main line	84
A70	575	Benoni, Classical with e4 and Nf3	97
A71	179	Benoni, Classical, 8.Bg5	76
A72	74	Benoni, Classical without 9.O-O	77
A73	103	Benoni, Classical, 9.O-O	90
A74	34	Benoni, Classical, 9...a6, 10.a4	79
A75	95	Benoni, Classical with ...a6 and 10...Bg4	86
A76	53	Benoni, Classical, 9...Re8	99
A77	180	Benoni, Classical, 9...Re8, 10.Nd2	103
A78	39	Benoni, Classical with ...Re8 and ...Na6	102
A79	114	Benoni, Classical, 11.f3	121
A80	12094	Dutch defense	91
A81	9827	Dutch defense	76
A82	1084	Dutch, Staunton gambit	102
A83	4636	Dutch, Staunton gambit, Stauntons line	78
A84	2548	Dutch defense	110
A85	2868	Dutch with 2.c4 & 3.Nc3	93
A86	470	Dutch with 2.c4 & 3.g3	83
A87	318	Dutch, Leningrad, Main variation	83
A88	59	Dutch, Leningrad, Main variation with 7...c6	105
A89	97	Dutch, Leningrad, Main variation with Nc6	68
A90	250	Dutch defense	90
A91	64	Dutch defense	82
A92	45	Dutch defense	104
A93	6	Dutch, Stonewall, Botwinnik variation	95
A94	11	Dutch, Stonewall with Ba3	77
A95	9	Dutch, Stonewall with Nc3	106
A96	18	Dutch, Classical variation	99
A97	11	Dutch, Ilyin-Genevsky variation	84
A98	8	Dutch, Ilyin-Genevsky variation with Qc2	87
A99	11	Dutch, Ilyin-Genevsky variation with b3	76
B00	19193	Kings pawn Opening includes Nimzowitsch Defence, St. George Defense, Owens Defense, Hippopotamus Def	142
B01	43699	Scandinavian Defense Center Counter Defense	137
B02	16494	Alekhines Defence	114
B03	8195	Alekhines Defense 3.d4	117
B04	5966	Alekhines defense, Modern variation	86
B05	5543	Alekhines defense, Modern variation, 4...Bg4	91
B06	39383	Robatsch Modern defense	110
B07	41594	Pirc defense	139
B08	6830	Pirc, Classical Two knights system	161
B09	8483	Pirc, Austrian attack	127
B10	14603	Caro-Kann Defense	149
B11	6257	Caro-Kann, Two knights, 3...Bg4	97
B12	32037	Caro-Kann defense	106
B13	13526	Caro-Kann, Exchange variation	169
B14	5363	Caro-Kann, Panov-Botvinnik attack, 5...e6	98
B15	3960	Caro-Kann defense	106
B16	2462	Caro-Kann, Bronstein-Larsen variation	122
B17	6486	Caro-Kann, Steinitz variation	115
B18	5777	Caro-Kann, Classical variation	138
B19	3170	Caro-Kann, Classical, 7...Nd7	120
B20	46727	Sicilian defense	145
B21	7497	Sicilian, Grand Prix attack and Smith-Morra Gambit	150
B22	41426	Sicilian, Alapins variation 2.c3	134
B23	38921	Sicilian, Closed	89
B24	9174	Sicilian, Closed	81
B25	4236	Sicilian, Closed	137
B26	3543	Sicilian, Closed, 6.Be3	91
B27	7417	Sicilian defense	86
B28	5642	Sicilian, OKelly variation	87
B29	3751	Sicilian, Nimzovich-Rubinstein variation	112
B30	26913	Sicilian defense	74
B31	9845	Sicilian, Nimzovich-Rossolimo attack with ...g6, without ...d6	99
B32	24237	Sicilian defense	104
B33	49804	Sicilian, Sveshnikov Lasker-Pelikan variation	156
B34	7019	Sicilian, Accelerated Fianchetto, Exchange variation	101
B35	3402	Sicilian, Accelerated Fianchetto, Modern variation with Bc4	94
B36	1821	Sicilian, Accelerated Fianchetto, Maroczy bind	92
B37	311	Sicilian, Accelerated Fianchetto, Maroczy bind, 5...Bg7	72
B38	2134	Sicilian, Accelerated Fianchetto, Maroczy bind, 6.Be3	91
B39	1239	Sicilian, Accelerated Fianchetto, Breyer variation	91
B40	21574	Sicilian defense	81
B41	28644	Sicilian, Kan variation	96
B42	10252	Sicilian, Kan, 5.Bd3	77
B43	10007	Sicilian, Kan, 5.Nc3	95
B44	4451	Sicilian defense	88
B45	2281	Sicilian, Taimanov variation	80
B46	2824	Sicilian, Taimanov variation	80
B47	3962	Sicilian, Taimanov Bastrikov variation	63
B48	1705	Sicilian, Taimanov variation	68
B49	385	Sicilian, Taimanov variation	67
B50	17360	Sicilian	90
B51	5295	Sicilian, Canal-Sokolsky attack	85
B52	7453	Sicilian, Canal-Sokolsky attack, 3...Bd7	72
B53	10004	Sicilian, Chekhover variation	151
B54	3117	Sicilian	63
B55	2443	Sicilian, Prins variation, Venice attack	76
B56	3938	Sicilian	58
B57	4513	Sicilian, Sozin not Scheveningen	76
B58	1851	Sicilian, Classical	105
B59	617	Sicilian, Boleslavsky variation, 7.Nb3	95
B60	814	Sicilian, Richter-Rauzer	58
B61	510	Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2	94
B62	464	Sicilian, Richter-Rauzer, 6...e6	58
B63	1342	Sicilian, Richter-Rauzer, Rauzer attack	77
B64	411	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f4	65
B65	354	Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4	69
B66	4791	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6	73
B67	1603	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd7	95
B68	145	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7	67
B69	158	Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf6	85
B70	9436	Sicilian, Dragon variation	137
B71	1283	Sicilian, Dragon, Levenfish variation	92
B72	2582	Sicilian, Dragon, 6.Be3	94
B73	162	Sicilian, Dragon, Classical, 8.O-O	114
B74	81	Sicilian, Dragon, Classical, 9.Nb3	81
B75	5748	Sicilian, Dragon, Yugoslav attack	102
B76	10603	Sicilian, Dragon, Yugoslav attack, 7...O-O	105
B77	2638	Sicilian, Dragon, Yugoslav attack, 9.Bc4	106
B78	2184	Sicilian, Dragon, Yugoslav attack, 10.O-O-O	108
B79	424	Sicilian, Dragon, Yugoslav attack, 12.h4	96
B80	2469	Sicilian Defence, Scheveningen Variation	95
B81	1897	Sicilian, Scheveningen, Keres attack	78
B82	540	Sicilian, Scheveningen, 6.f4	107
B83	1202	Sicilian, Scheveningen, 6.Be2	116
B84	323	Sicilian, Scheveningen Paulsen, Classical variation	74
B85	508	Sicilian, Scheveningen, Classical variation with ...Qc7 and ...Nc6	122
B86	494	Sicilian, Sozin attack	91
B87	107	Sozin with ...a6 and ...b5	81
B88	48	Sicilian, Sozin, Leonhardt variation	83
B89	71	Sicilian, Sozin, 7.Be3	82
B90	35192	Sicilian, Najdorf	137
B91	1981	Sicilian, Najdorf, Zagreb Fianchetto variation	111
B92	15236	Sicilian, Najdorf, Zagreb Fianchetto variation	70
B93	5829	Sicilian, Najdorf, 6.f4	78
B94	1929	Sicilian, Najdorf, 6.Bg5	104
B95	2708	Sicilian, Najdorf, 6...e6	71
B96	4982	Sicilian, Najdorf, 7.f4	108
B97	4845	Sicilian, Najdorf, 7...Qb6	103
B98	2416	Sicilian, Najdorf, 7...Be7	112
B99	3703	Sicilian, Najdorf, 7...Be7 Main line	101
C00	27947	French Defence	133
C01	18884	French, Exchange Variation, Kingston Defence	120
C02	24334	French, Advance Variation	131
C03	7440	French, Tarrasch	99
C04	2613	French, Tarrasch, Guimard Main line	83
C05	9274	French, Tarrasch, Closed Variation	85
C06	9420	French, Tarrasch, Closed Variation, Main line	132
C07	7057	French, Tarrasch, Open Variation	108
C08	2400	French, Tarrasch, Open, 4.exd5 exd5	94
C09	1404	French, Tarrasch, Open Variation, Main line	77
C10	6847	French, Paulsen Variation	79
C11	7954	French Defense	117
C12	7913	French, MacCutcheon Variation	107
C13	611	French, Classical	78
C14	5475	French, Classical Variation	67
C15	9392	French, Winawer Nimzovich Variation	80
C16	7321	French, Winawer, Advance Variation	65
C17	2964	French, Winawer, Advance Variation	70
C18	13705	French, Winawer, Advance Variation	80
C19	3735	French, Winawer, Advance, 6...Ne7	70
C20	3930	Kings Pawn Game includes Alapins Opening	199
C21	4045	Center Game	97
C22	2560	Center Game	125
C23	4411	Bishops Opening	73
C24	9260	Bishops Opening, Berlin Defense	113
C25	6156	Vienna Game	67
C26	3766	Vienna Game, Falkbeer Variation	57
C27	1864	Vienna Game	58
C28	1016	Vienna Game	89
C29	3674	Vienna Gambit, Kaufmann Variation	71
C30	5399	Kings Gambit	79
C31	1821	Kings Gambit Declined, Falkbeer Countergambit	98
C32	1674	Kings Gambit Declined, Falkbeer, 5. dxe4	93
C33	2593	Kings Gambit Accepted	147
C34	4316	Kings Gambit Accepted	80
C35	1251	Kings Gambit Accepted, Cunningham Defense	65
C36	1676	Kings Gambit Accepted, Abbazia Defense Classical Defense, Modern Defense	80
C37	1182	Kings Gambit Accepted, Quaade Gambit	147
C38	826	Kings Gambit Accepted	113
C39	2297	KGA, Allagier & Kiesertisky Gambits	96
C40	9990	Kings Knight Opening includes Gunderam Defense, Greco Defense, Damiano Defense, Elephant Gambit, and	110
C41	13167	Philidor Defense	190
C42	25126	Petrovs Defense	120
C43	5983	Petrovs Defense, Modern Steinitz Attack	184
C44	16388	Kings Pawn Game includes Ponziani Opening, some Scotch Game	98
C45	19023	Scotch Game	117
C46	3890	Three Knights Game	73
C47	9863	Four Knights Game, Scotch Variation	92
C48	2860	Four Knights Game, Spanish Variation	125
C49	1934	Four Knights Game, Double Ruy Lopez	90
C50	16044	Kings Pawn Game includes Hungarian Defence and Giuoco Pianissimo	96
C51	2191	Evans Gambit	115
C52	1884	Evans Gambit with 4...Bxb4 5.c3 Ba5	109
C53	2304	Giuoco Piano	67
C54	8155	Giuoco Piano	119
C55	10819	Two Knights Defense	78
C56	3558	Two Knights Defense	83
C57	4462	Two Knights Defense	109
C58	1763	Two Knights Defense	74
C59	1556	Two Knights Defense	105
C60	4476	Ruy Lopez	76
C61	2347	Ruy Lopez, Birds Defense	100
C62	4534	Ruy Lopez, Old Steinitz Defense	97
C63	6414	Ruy Lopez, Schliemann Defense	150
C64	5149	Ruy Lopez, Classical Cordel Defense	85
C65	6184	Ruy Lopez, Berlin Defense	65
C66	988	Ruy Lopez, Berlin Defense, 4.O-O, d6	122
C67	4351	Ruy Lopez, Berlin Defense, Open variation	87
C68	8918	Ruy Lopez, Exchange Variation	65
C69	2548	Ruy Lopez, Exchange Variation, 5.O-O	127
C70	4305	Ruy Lopez	55
C71	1039	Ruy Lopez, Modern Steinitz Defense	102
C72	2001	Ruy Lopez, Modern Steinitz Defense 5.0-0	130
C73	1099	Ruy Lopez, Modern Steinitz Defense, Richter variation	68
C74	1078	Ruy Lopez, Modern Steinitz Defense	58
C75	978	Ruy Lopez, Modern Steinitz Defense	47
C76	232	Ruy Lopez, Modern Steinitz Defense, Fianchetto Bronstein variation	70
C77	8793	Ruy Lopez, Morphy Defense	98
C78	9580	Ruy Lopez, 5.O-O	57
C79	1117	Ruy Lopez, Steinitz Defense Deferred Russian Defense	95
C80	13288	Ruy Lopez, Open Tarrasch Defense	90
C81	962	Ruy Lopez, Open, Howell Attack	54
C82	1812	Ruy Lopez, Open, 9.c3	120
C83	1143	Ruy Lopez, Open, Classical Defense	88
C84	1586	Ruy Lopez, Closed Defense	80
C85	1794	Ruy Lopez, Exchange Variation Doubly Deferred DERLD	73
C86	1247	Ruy Lopez, Worrall Attack	104
C87	798	Ruy Lopez, Closed, Averbach Variation	137
C88	5265	Ruy Lopez, Closed	60
C89	7206	Ruy Lopez, Marshall Counterattack	100
C90	2684	Ruy Lopez, Closed with ...d6	58
C91	1586	Ruy Lopez, Closed, 9.d4	67
C92	3961	Ruy Lopez, Closed, 9.h3	71
C93	635	Ruy Lopez, Closed, Smyslov Defense	84
C94	191	Ruy Lopez, Closed, Breyer Defense	72
C95	1824	Ruy Lopez, Closed, Breyer, 10.d4	81
C96	1432	Ruy Lopez, Closed, 8...Na5	108
C97	1206	Ruy Lopez, Closed, Chigorin Defense	73
C98	612	Ruy Lopez, Closed, Chigorin, 12...Nc6	72
C99	1846	Ruy Lopez, Closed, Chigorin, 12...c5d4	100
D00	26289	Queens Pawn Game including Blackmar-Diemer Gambit and others	238
D01	4641	Richter-Veresov Attack	85
D02	43045	Queens Pawn Game, 2. Nf3	83
D03	3100	Torre Attack, Tartakower variation	112
D04	3202	Queens Pawn Game	62
D05	1920	Queens Pawn Game, Zukertort variation	96
D06	5888	Queens Gambit	81
D07	4351	Queens Gambit Declined, Chigorin defense	99
D08	2354	Queens Gambit Declined, Albin Countergambit	79
D09	1574	Queens Gambit Declined, Albin Countergambit, 5.g3	67
D10	22569	Queens Gambit Declined, Slav Defense	63
D11	4901	Queens Gambit Declined, Slav defense, 3.Nf3	75
D12	3227	Queens Gambit Declined, Slav defense, 4.e3 Bf5	91
D13	527	Queens Gambit Declined, Slav defense, Exchange variation	54
D14	218	Queens Gambit Declined, Slav defense, Exchange variation	85
D15	11031	Queens Gambit Declined, Slav, 4.Nc3	80
D16	1011	Queens Gambit Declined, Slav accepted, Alapin variation	86
D17	1819	Queens Gambit Declined, Slav defense, Czech defense	61
D18	2178	Queens Gambit Declined, Dutch variation	65
D19	584	Queens Gambit Declined, Dutch variation	63
D20	9658	Queens Gambit Accepted	106
D21	2250	Queens Gambit Accepted, 3.Nf3	79
D22	1464	Queens Gambit Accepted, Alekhine defense	76
D23	401	Queens gambit accepted	65
D24	1575	Queens Gambit Accepted, 4.Nc3	60
D25	1747	Queens Gambit Accepted, 4.e3	55
D26	1026	Queens Gambit Accepted, classical variation	63
D27	2017	Queens Gambit Accepted, classical variation	54
D28	107	Queens Gambit Accepted, Classical variation 7.Qe2	50
D29	582	Queens Gambit Accepted, Classical variation 8...Bb7	135
D30	16271	Queens Gambit Declined	55
D31	14245	Queens Gambit Declined, 3.Nc3	76
D32	3283	Queens Gambit Declined, Tarrasch Defense	103
D33	323	Queens Gambit Declined, Tarrasch, Schlechter-Rubinstein system	59
D34	1816	Queens Gambit Declined, Tarrasch, 7...Be7	81
D35	5912	Queens Gambit Declined, Exchange Variation	94
D36	453	Queens Gambit Declined, Exchange, positional line, 6.Qc2	62
D37	3453	Queens Gambit Declined, 4.Nf3	71
D38	198	Queens Gambit Declined, Ragozin variation	64
D39	116	Queens Gambit Declined, Ragozin, Vienna variation	103
D40	161	Queens Gambit Declined, Semi-Tarrasch defense	63
D41	365	Queens Gambit Declined, Semi-Tarrasch, 5.cd	55
D42	53	Queens Gambit Declined, Semi-Tarrasch, 7.Bd3	69
D43	407	Queens Gambit Declined, Semi-Slav Defense	134
D44	117	Queens Gambit Declined, Semi-Slav 5.Bg5 dxc4	61
D45	349	Queens Gambit Declined, Semi-Slav 5.e3	77
D46	93	Queens Gambit Declined, Semi-Slav 6.Bd3	56
D47	115	Queens Gambit Declined, Semi-Slav 7.Bc4	133
D48	44	Queens Gambit Declined, Meran, 8...a6	60
D49	30	Queens Gambit Declined, Meran, 11.Nxb5	104
D50	1457	Queens Gambit Declined, 4.Bg5	58
D51	3056	Queens Gambit Declined, 4.Bg5 Nbd7 Cambridge Springs Defense	83
D52	898	Queens Gambit Declined	78
D53	2415	Queens Gambit Declined, 4.Bg5 Be7	54
D54	2589	Queens Gambit Declined, Anti-neo-Orthodox variation	51
D55	687	Queens Gambit Declined, 6.Nf3	56
D56	169	Queens Gambit Declined, Lasker defense	66
D57	57	Queens Gambit Declined, Lasker defense, Main line	95
D58	387	Queens Gambit Declined, Tartakower Makagonov-Bondarevsky system	79
D59	232	Queens Gambit Declined, Tartakower Makagonov-Bondarevsky system, 8.cd Nxd5	77
D60	244	Queens Gambit Declined, Orthodox defense	59
D61	185	Queens Gambit Declined, Orthodox defense, Rubinstein variation	47
D62	25	Queens Gambit Declined, Orthodox defense, 7.Qc2 c5, 8.cd Rubinstein	81
D63	150	Queens Gambit Declined, Orthodox defense, 7.Rc1	61
D64	76	Queens Gambit Declined, Orthodox defense, Rubinstein attack with Rc1	80
D65	2	Queens Gambit Declined, Orthodox defense, Rubinstein attack, Main line	65
D66	80	Queens Gambit Declined, Orthodox defense, Bd3 line	50
D67	47	Queens Gambit Declined, Orthodox defense, Bd3 line, Capablanca freeing manoeuver	64
D68	86	Queens Gambit Declined, Orthodox defense, Classical variation	82
D69	39	Queens Gambit Declined, Orthodox defense, Classical, 13.dxe5	61
D70	1214	Neo-Grunfeld Defence, Ziegler Variant	92
D71	259	Neo-Grunfeld, 5.cd	85
D72	29	Neo-Grunfeld, 5.cd, Main line	53
D73	3	Neo-Grunfeld, 5.Nf3	135
D74	3