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Chess Database containing over 3 million free PGN chess games. | 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 | |
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