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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 | 136057 | Irregular Openings | 1975 | | A01 | 15722 | Larsens Opening | 810 | | A02 | 12072 | Birds Opening | 759 | | A03 | 10704 | Birds Opening, 1...d5 | 722 | | A04 | 56423 | Reti Opening | 632 | | A05 | 101324 | Reti Opening, 2...Nf6 | 598 | | A06 | 31605 | Reti Opening, 2...d5 | 586 | | A07 | 20234 | Reti Opening, Kings Indian attack Barcza system | 518 | | A08 | 2467 | Reti Opening, Kings Indian attack | 707 | | A09 | 22753 | Reti Opening, 2...d5 3.c4 | 632 | | A10 | 31835 | English Opening | 771 | | A11 | 8719 | English, Caro-Kann defensive system | 577 | | A12 | 654 | English, Caro-Kann defensive system | 519 | | A13 | 19752 | English Opening | 526 | | A14 | 435 | English, Neo-Catalan declined | 599 | | A15 | 30572 | English, 1...Nf6 Anglo-Indian defense | 472 | | A16 | 41408 | English Opening | 597 | | A17 | 5501 | English Opening, Hedgehog Defense | 613 | | A18 | 2596 | English, Mikenas-Carls variation | 510 | | A19 | 1131 | English, Mikenas-Carls, Sicilian variation | 583 | | A20 | 14051 | English Opening | 539 | | A21 | 7557 | English Opening | 543 | | A22 | 15474 | English Opening | 601 | | A23 | 1212 | English Opening, Bremen system, Keres variation | 501 | | A24 | 299 | English Opening, Bremen system with 3...g6 | 692 | | A25 | 5495 | English Opening, Sicilian Reversed | 583 | | A26 | 758 | English Opening, Closed system | 545 | | A27 | 1991 | English Opening, Three knights system | 523 | | A28 | 717 | English Opening, Four knights system | 550 | | A29 | 676 | English Opening, Four knights, kingside Fianchetto | 644 | | A30 | 10480 | English Opening, Symmetrical variation | 433 | | A31 | 430 | English Opening, Symmetrical, Benoni formation | 492 | | A32 | 116 | English Opening, Symmetrical | 514 | | A33 | 4619 | English Opening, Symmetrical | 492 | | A34 | 4498 | English Opening, Symmetrical | 443 | | A35 | 1756 | English Opening, Symmetrical | 651 | | A36 | 2200 | English Opening, Symmetrical | 676 | | A37 | 513 | English Opening, Symmetrical | 429 | | A38 | 175 | English Opening, Symmetrical | 552 | | A39 | 146 | English Opening, Symmetrical, Main line with d4 | 487 | | A40 | 73505 | Queens Pawn Game | 600 | | A41 | 12413 | Queens Pawn Game | 571 | | A42 | 6103 | Modern defense, Averbakh system | 548 | | A43 | 9329 | Old Benoni defense | 570 | | A44 | 3185 | Old Benoni defense | 499 | | A45 | 64803 | Queens Pawn Game | 537 | | A46 | 58268 | Queens Pawn Game | 584 | | A47 | 3136 | Queens Indian Defense | 531 | | A48 | 38248 | Kings Indian, East Indian defense | 511 | | A49 | 7473 | Kings Indian, Fianchetto without c4 | 508 | | A50 | 6516 | Queens Pawn Game | 585 | | A51 | 2653 | Budapest Defense declined | 654 | | A52 | 6984 | Budapest defense | 669 | | A53 | 8930 | Old Indian Defense | 430 | | A54 | 699 | Old Indian, Ukrainian variation | 517 | | A55 | 367 | Old Indian, Main line | 505 | | A56 | 17210 | Benoni Defense | 468 | | A57 | 13194 | Benko gambit | 598 | | A58 | 5540 | Benko gambit accepted | 480 | | A59 | 611 | Benko gambit, 7.e4 | 701 | | A60 | 3975 | Benoni defense | 529 | | A61 | 3341 | Benoni defense | 498 | | A62 | 265 | Benoni, Fianchetto variation | 677 | | A63 | 106 | Benoni, Fianchetto variation, 9...Nbd7 | 589 | | A64 | 56 | Benoni, Fianchetto variation, 11...Re8 | 579 | | A65 | 2404 | Benoni, 6.e4 | 539 | | A66 | 307 | Benoni, pawn storm variation | 519 | | A67 | 1648 | Benoni, Taimanov variation | 561 | | A68 | 284 | Benoni, Four pawns attack | 577 | | A69 | 177 | Benoni, Four pawns attack, Main line | 560 | | A70 | 575 | Benoni, Classical with e4 and Nf3 | 485 | | A71 | 179 | Benoni, Classical, 8.Bg5 | 494 | | A72 | 74 | Benoni, Classical without 9.O-O | 501 | | A73 | 103 | Benoni, Classical, 9.O-O | 551 | | A74 | 34 | Benoni, Classical, 9...a6, 10.a4 | 647 | | A75 | 95 | Benoni, Classical with ...a6 and 10...Bg4 | 399 | | A76 | 53 | Benoni, Classical, 9...Re8 | 579 | | A77 | 180 | Benoni, Classical, 9...Re8, 10.Nd2 | 435 | | A78 | 39 | Benoni, Classical with ...Re8 and ...Na6 | 550 | | A79 | 114 | Benoni, Classical, 11.f3 | 514 | | A80 | 12094 | Dutch defense | 738 | | A81 | 9827 | Dutch defense | 568 | | A82 | 1084 | Dutch, Staunton gambit | 563 | | A83 | 4637 | Dutch, Staunton gambit, Stauntons line | 500 | | A84 | 2548 | Dutch defense | 698 | | A85 | 2868 | Dutch with 2.c4 & 3.Nc3 | 544 | | A86 | 470 | Dutch with 2.c4 & 3.g3 | 616 | | A87 | 318 | Dutch, Leningrad, Main variation | 546 | | A88 | 59 | Dutch, Leningrad, Main variation with 7...c6 | 602 | | A89 | 97 | Dutch, Leningrad, Main variation with Nc6 | 592 | | A90 | 250 | Dutch defense | 476 | | A91 | 64 | Dutch defense | 576 | | A92 | 45 | Dutch defense | 647 | | A93 | 6 | Dutch, Stonewall, Botwinnik variation | 498 | | A94 | 11 | Dutch, Stonewall with Ba3 | 589 | | A95 | 9 | Dutch, Stonewall with Nc3 | 532 | | A96 | 18 | Dutch, Classical variation | 528 | | A97 | 11 | Dutch, Ilyin-Genevsky variation | 594 | | A98 | 8 | Dutch, Ilyin-Genevsky variation with Qc2 | 516 | | A99 | 11 | Dutch, Ilyin-Genevsky variation with b3 | 517 | | B00 | 19640 | Kings pawn Opening includes Nimzowitsch Defence, St. George Defense, Owens Defense, Hippopotamus Def | 644 | | B01 | 43771 | Scandinavian Defense Center Counter Defense | 626 | | B02 | 16495 | Alekhines Defence | 591 | | B03 | 8195 | Alekhines Defense 3.d4 | 494 | | B04 | 5966 | Alekhines defense, Modern variation | 658 | | B05 | 5543 | Alekhines defense, Modern variation, 4...Bg4 | 607 | | B06 | 39447 | Robatsch Modern defense | 655 | | B07 | 41595 | Pirc defense | 697 | | B08 | 6830 | Pirc, Classical Two knights system | 616 | | B09 | 8483 | Pirc, Austrian attack | 714 | | B10 | 14614 | Caro-Kann Defense | 608 | | B11 | 6261 | Caro-Kann, Two knights, 3...Bg4 | 551 | | B12 | 36861 | Caro-Kann defense | 704 | | B13 | 13536 | Caro-Kann, Exchange variation | 736 | | B14 | 5368 | Caro-Kann, Panov-Botvinnik attack, 5...e6 | 519 | | B15 | 3965 | Caro-Kann defense | 489 | | B16 | 2465 | Caro-Kann, Bronstein-Larsen variation | 645 | | B17 | 6493 | Caro-Kann, Steinitz variation | 537 | | B18 | 5785 | Caro-Kann, Classical variation | 618 | | B19 | 3171 | Caro-Kann, Classical, 7...Nd7 | 588 | | B20 | 49971 | Sicilian defense | 688 | | B21 | 7497 | Sicilian, Grand Prix attack and Smith-Morra Gambit | 844 | | B22 | 43007 | Sicilian, Alapins variation 2.c3 | 592 | | B23 | 38923 | Sicilian, Closed | 542 | | B24 | 9174 | Sicilian, Closed | 606 | | B25 | 4236 | Sicilian, Closed | 565 | | B26 | 3543 | Sicilian, Closed, 6.Be3 | 546 | | B27 | 7418 | Sicilian defense | 564 | | B28 | 5642 | Sicilian, OKelly variation | 480 | | B29 | 3752 | Sicilian, Nimzovich-Rubinstein variation | 589 | | B30 | 26914 | Sicilian defense | 506 | | B31 | 9845 | Sicilian, Nimzovich-Rossolimo attack with ...g6, without ...d6 | 440 | | B32 | 24237 | Sicilian defense | 677 | | B33 | 49808 | Sicilian, Sveshnikov Lasker-Pelikan variation | 785 | | B34 | 7019 | Sicilian, Accelerated Fianchetto, Exchange variation | 516 | | B35 | 3402 | Sicilian, Accelerated Fianchetto, Modern variation with Bc4 | 600 | | B36 | 1821 | Sicilian, Accelerated Fianchetto, Maroczy bind | 462 | | B37 | 311 | Sicilian, Accelerated Fianchetto, Maroczy bind, 5...Bg7 | 468 | | B38 | 2134 | Sicilian, Accelerated Fianchetto, Maroczy bind, 6.Be3 | 474 | | B39 | 1239 | Sicilian, Accelerated Fianchetto, Breyer variation | 605 | | B40 | 21923 | Sicilian defense | 473 | | B41 | 28644 | Sicilian, Kan variation | 557 | | B42 | 10252 | Sicilian, Kan, 5.Bd3 | 632 | | B43 | 10007 | Sicilian, Kan, 5.Nc3 | 562 | | B44 | 4451 | Sicilian defense | 584 | | B45 | 2281 | Sicilian, Taimanov variation | 624 | | B46 | 2824 | Sicilian, Taimanov variation | 556 | | B47 | 3962 | Sicilian, Taimanov Bastrikov variation | 519 | | B48 | 1705 | Sicilian, Taimanov variation | 491 | | B49 | 385 | Sicilian, Taimanov variation | 508 | | B50 | 17376 | Sicilian | 492 | | B51 | 5296 | Sicilian, Canal-Sokolsky attack | 545 | | B52 | 7453 | Sicilian, Canal-Sokolsky attack, 3...Bd7 | 612 | | B53 | 10115 | Sicilian, Chekhover variation | 594 | | B54 | 3117 | Sicilian | 542 | | B55 | 2443 | Sicilian, Prins variation, Venice attack | 459 | | B56 | 3938 | Sicilian | 455 | | B57 | 4513 | Sicilian, Sozin not Scheveningen | 587 | | B58 | 1851 | Sicilian, Classical | 662 | | B59 | 617 | Sicilian, Boleslavsky variation, 7.Nb3 | 517 | | B60 | 814 | Sicilian, Richter-Rauzer | 484 | | B61 | 510 | Sicilian, Richter-Rauzer, Larsen variation, 7.Qd2 | 499 | | B62 | 464 | Sicilian, Richter-Rauzer, 6...e6 | 596 | | B63 | 1342 | Sicilian, Richter-Rauzer, Rauzer attack | 688 | | B64 | 411 | Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f4 | 410 | | B65 | 354 | Sicilian, Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4 | 521 | | B66 | 4791 | Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 | 449 | | B67 | 1603 | Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd7 | 516 | | B68 | 145 | Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7 | 502 | | B69 | 158 | Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf6 | 511 | | B70 | 9436 | Sicilian, Dragon variation | 641 | | B71 | 1283 | Sicilian, Dragon, Levenfish variation | 497 | | B72 | 2582 | Sicilian, Dragon, 6.Be3 | 702 | | B73 | 162 | Sicilian, Dragon, Classical, 8.O-O | 596 | | B74 | 81 | Sicilian, Dragon, Classical, 9.Nb3 | 435 | | B75 | 5748 | Sicilian, Dragon, Yugoslav attack | 526 | | B76 | 10603 | Sicilian, Dragon, Yugoslav attack, 7...O-O | 519 | | B77 | 2638 | Sicilian, Dragon, Yugoslav attack, 9.Bc4 | 623 | | B78 | 2184 | Sicilian, Dragon, Yugoslav attack, 10.O-O-O | 676 | | B79 | 424 | Sicilian, Dragon, Yugoslav attack, 12.h4 | 533 | | B80 | 2469 | Sicilian Defence, Scheveningen Variation | 539 | | B81 | 1897 | Sicilian, Scheveningen, Keres attack | 582 | | B82 | 540 | Sicilian, Scheveningen, 6.f4 | 550 | | B83 | 1202 | Sicilian, Scheveningen, 6.Be2 | 605 | | B84 | 323 | Sicilian, Scheveningen Paulsen, Classical variation | 517 | | B85 | 508 | Sicilian, Scheveningen, Classical variation with ...Qc7 and ...Nc6 | 503 | | B86 | 494 | Sicilian, Sozin attack | 574 | | B87 | 107 | Sozin with ...a6 and ...b5 | 517 | | B88 | 48 | Sicilian, Sozin, Leonhardt variation | 597 | | B89 | 71 | Sicilian, Sozin, 7.Be3 | 585 | | B90 | 35192 | Sicilian, Najdorf | 600 | | B91 | 1981 | Sicilian, Najdorf, Zagreb Fianchetto variation | 598 | | B92 | 15236 | Sicilian, Najdorf, Zagreb Fianchetto variation | 525 | | B93 | 5829 | Sicilian, Najdorf, 6.f4 | 544 | | B94 | 1929 | Sicilian, Najdorf, 6.Bg5 | 495 | | B95 | 2709 | Sicilian, Najdorf, 6...e6 | 535 | | B96 | 4983 | Sicilian, Najdorf, 7.f4 | 701 | | B97 | 4845 | Sicilian, Najdorf, 7...Qb6 | 592 | | B98 | 2416 | Sicilian, Najdorf, 7...Be7 | 539 | | B99 | 3703 | Sicilian, Najdorf, 7...Be7 Main line | 526 | | C00 | 27955 | French Defence | 682 | | C01 | 18884 | French, Exchange Variation, Kingston Defence | 521 | | C02 | 24337 | French, Advance Variation | 659 | | C03 | 7444 | French, Tarrasch | 572 | | C04 | 2617 | French, Tarrasch, Guimard Main line | 569 | | C05 | 9284 | French, Tarrasch, Closed Variation | 532 | | C06 | 9422 | French, Tarrasch, Closed Variation, Main line | 590 | | C07 | 7065 | French, Tarrasch, Open Variation | 543 | | C08 | 2402 | French, Tarrasch, Open, 4.exd5 exd5 | 570 | | C09 | 1407 | French, Tarrasch, Open Variation, Main line | 583 | | C10 | 6848 | French, Paulsen Variation | 586 | | C11 | 7959 | French Defense | 618 | | C12 | 7914 | French, MacCutcheon Variation | 608 | | C13 | 611 | French, Classical | 504 | | C14 | 5475 | French, Classical Variation | 480 | | C15 | 9392 | French, Winawer Nimzovich Variation | 656 | | C16 | 7330 | French, Winawer, Advance Variation | 607 | | C17 | 2964 | French, Winawer, Advance Variation | 526 | | C18 | 13713 | French, Winawer, Advance Variation | 472 | | C19 | 3735 | French, Winawer, Advance, 6...Ne7 | 492 | | C20 | 4126 | Kings Pawn Game includes Alapins Opening | 680 | | C21 | 4254 | Center Game | 571 | | C22 | 2636 | Center Game | 614 | | C23 | 4411 | Bishops Opening | 494 | | C24 | 9262 | Bishops Opening, Berlin Defense | 570 | | C25 | 6157 | Vienna Game | 389 | | C26 | 3767 | Vienna Game, Falkbeer Variation | 664 | | C27 | 1865 | Vienna Game | 427 | | C28 | 1016 | Vienna Game | 479 | | C29 | 3674 | Vienna Gambit, Kaufmann Variation | 449 | | C30 | 6690 | Kings Gambit | 527 | | C31 | 2833 | Kings Gambit Declined, Falkbeer Countergambit | 539 | | C32 | 1742 | Kings Gambit Declined, Falkbeer, 5. dxe4 | 607 | | C33 | 2609 | Kings Gambit Accepted | 685 | | C34 | 4415 | Kings Gambit Accepted | 621 | | C35 | 1260 | Kings Gambit Accepted, Cunningham Defense | 545 | | C36 | 1677 | Kings Gambit Accepted, Abbazia Defense Classical Defense, Modern Defense | 564 | | C37 | 2596 | Kings Gambit Accepted, Quaade Gambit | 576 | | C38 | 826 | Kings Gambit Accepted | 465 | | C39 | 2313 | KGA, Allagier & Kiesertisky Gambits | 531 | | C40 | 9991 | Kings Knight Opening includes Gunderam Defense, Greco Defense, Damiano Defense, Elephant Gambit, and | 515 | | C41 | 13169 | Philidor Defense | 637 | | C42 | 25134 | Petrovs Defense | 674 | | C43 | 5984 | Petrovs Defense, Modern Steinitz Attack | 539 | | C44 | 16389 | Kings Pawn Game includes Ponziani Opening, some Scotch Game | 576 | | C45 | 19024 | Scotch Game | 630 | | C46 | 3891 | Three Knights Game | 606 | | C47 | 9864 | Four Knights Game, Scotch Variation | 561 | | C48 | 2860 | Four Knights Game, Spanish Variation | 582 | | C49 | 1934 | Four Knights Game, Double Ruy Lopez | 517 | | C50 | 16046 | Kings Pawn Game includes Hungarian Defence and Giuoco Pianissimo | 694 | | C51 | 2191 | Evans Gambit | 511 | | C52 | 1884 | Evans Gambit with 4...Bxb4 5.c3 Ba5 | 519 | | C53 | 2304 | Giuoco Piano | 527 | | C54 | 8156 | Giuoco Piano | 507 | | C55 | 10820 | Two Knights Defense | 604 | | C56 | 3558 | Two Knights Defense | 513 | | C57 | 4462 | Two Knights Defense | 632 | | C58 | 1763 | Two Knights Defense | 479 | | C59 | 1557 | Two Knights Defense | 558 | | C60 | 4476 | Ruy Lopez | 589 | | C61 | 2347 | Ruy Lopez, Birds Defense | 628 | | C62 | 4535 | Ruy Lopez, Old Steinitz Defense | 510 | | C63 | 6416 | Ruy Lopez, Schliemann Defense | 643 | | C64 | 5151 | Ruy Lopez, Classical Cordel Defense | 689 | | C65 | 6186 | Ruy Lopez, Berlin Defense | 477 | | C66 | 988 | Ruy Lopez, Berlin Defense, 4.O-O, d6 | 662 | | C67 | 4352 | Ruy Lopez, Berlin Defense, Open variation | 489 | | C68 | 8919 | Ruy Lopez, Exchange Variation | 617 | | C69 | 2550 | Ruy Lopez, Exchange Variation, 5.O-O | 569 | | C70 | 4309 | Ruy Lopez | 546 | | C71 | 1040 | Ruy Lopez, Modern Steinitz Defense | 511 | | C72 | 2002 | Ruy Lopez, Modern Steinitz Defense 5.0-0 | 575 | | C73 | 1101 | Ruy Lopez, Modern Steinitz Defense, Richter variation | 606 | | C74 | 1079 | Ruy Lopez, Modern Steinitz Defense | 559 | | C75 | 978 | Ruy Lopez, Modern Steinitz Defense | 525 | | C76 | 232 | Ruy Lopez, Modern Steinitz Defense, Fianchetto Bronstein variation | 462 | | C77 | 10588 | Ruy Lopez, Morphy Defense | 516 | | C78 | 9583 | Ruy Lopez, 5.O-O | 650 | | C79 | 1118 | Ruy Lopez, Steinitz Defense Deferred Russian Defense | 556 | | C80 | 13293 | Ruy Lopez, Open Tarrasch Defense | 543 | | C81 | 962 | Ruy Lopez, Open, Howell Attack | 526 | | C82 | 1812 | Ruy Lopez, Open, 9.c3 | 568 | | C83 | 1143 | Ruy Lopez, Open, Classical Defense | 564 | | C84 | 1587 | Ruy Lopez, Closed Defense | 530 | | C85 | 1813 | Ruy Lopez, Exchange Variation Doubly Deferred DERLD | 525 | | C86 | 1247 | Ruy Lopez, Worrall Attack | 535 | | C87 | 798 | Ruy Lopez, Closed, Averbach Variation | 529 | | C88 | 5265 | Ruy Lopez, Closed | 531 | | C89 | 7206 | Ruy Lopez, Marshall Counterattack | 508 | | C90 | 2684 | Ruy Lopez, Closed with ...d6 | 565 | | C91 | 1586 | Ruy Lopez, Closed, 9.d4 | 615 | | C92 | 3961 | Ruy Lopez, Closed, 9.h3 | 467 | | C93 | 635 | Ruy Lopez, Closed, Smyslov Defense | 498 | | C94 | 191 | Ruy Lopez, Closed, Breyer Defense | 405 | | C95 | 1824 | Ruy Lopez, Closed, Breyer, 10.d4 | 515 | | C96 | 1432 | Ruy Lopez, Closed, 8...Na5 | 450 | | C97 | 1206 | Ruy Lopez, Closed, Chigorin Defense | 652 | | C98 | 612 | Ruy Lopez, Closed, Chigorin, 12...Nc6 | 487 | | C99 | 1846 | Ruy Lopez, Closed, Chigorin, 12...c5d4 | 552 | | D00 | 26501 | Queens Pawn Game including Blackmar-Diemer Gambit and others | 789 | | D01 | 4643 | Richter-Veresov Attack | 603 | | D02 | 43046 | Queens Pawn Game, 2. Nf3 | 492 | | D03 | 3102 | Torre Attack, Tartakower variation | 511 | | D04 | 3202 | Queens Pawn Game | 481 | | D05 | 1920 | Queens Pawn Game, Zukertort variation | 686 | | D06 | 5888 | Queens Gambit | 550 | | D07 | 4352 | Queens Gambit Declined, Chigorin defense | 620 | | D08 | 2354 | Queens Gambit Declined, Albin Countergambit | 671 | | D09 | 1574 | Queens Gambit Declined, Albin Countergambit, 5.g3 | 525 | | D10 | 22569 | Queens Gambit Declined, Slav Defense | 559 | | D11 | 4901 | Queens Gambit Declined, Slav defense, 3.Nf3 | 505 | | D12 | 3227 | Queens Gambit Declined, Slav defense, 4.e3 Bf5 | 579 | | D13 | 527 | Queens Gambit Declined, Slav defense, Exchange variation | 521 | | D14 | 218 | Queens Gambit Declined, Slav defense, Exchange variation | 459 | | D15 | 11031 | Queens Gambit Declined, Slav, 4.Nc3 | 570 | | D16 | 1011 | Queens Gambit Declined, Slav accepted, Alapin variation | 594 | | D17 | 1819 | Queens Gambit Declined, Slav defense, Czech defense | 518 | | D18 | 2178 | Queens Gambit Declined, Dutch variation | 448 | | D19 | 584 | Queens Gambit Declined, Dutch variation | 586 | | D20 | 9658 | Queens Gambit Accepted | 537 | | D21 | 2250 | Queens Gambit Accepted, 3.Nf3 | 523 | | D22 | 1464 | Queens Gambit Accepted, Alekhine defense | 511 | | D23 | 401 | Queens gambit accepted | 535 | | D24 | 1575 | Queens Gambit Accepted, 4.Nc3 | 566 | | D25 | 1747 | Queens Gambit Accepted, 4.e3 | 425 | | D26 | 1026 | Queens Gambit Accepted, classical variation | 414 | | D27 | 2017 | Queens Gambit Accepted, classical variation | 487 | | D28 | 107 | Queens Gambit Accepted, Classical variation 7.Qe2 | 445 | | D29 | 582 | Queens Gambit Accepted, Classical variation 8...Bb7 | 617 | | D30 | 17542 | Queens Gambit Declined | 451 | | D31 | 14245 | Queens Gambit Declined, 3.Nc3 | 611 | | D32 | 3283 | Queens Gambit Declined, Tarrasch Defense | 501 | | D33 | 323 | Queens Gambit Declined, Tarrasch, Schlechter-Rubinstein system | 554 | | D34 | 1816 | Queens Gambit Declined, Tarrasch, 7...Be7 | 454 | | D35 | 5912 | Queens Gambit Declined, Exchange Variation | 557 | | D36 | 453 | Queens Gambit Declined, Exchange, positional line, 6.Qc2 | 544 | | D37 | 3453 | Queens Gambit Declined, 4.Nf3 | 513 | | D38 | 198 | Queens Gambit Declined, Ragozin variation | 527 | | D39 | 116 | Queens Gambit Declined, Ragozin, Vienna variation | 605 | | D40 | 161 | Queens Gambit Declined, Semi-Tarrasch defense | 525 | | D41 | 365 | Queens Gambit Declined, Semi-Tarrasch, 5.cd | 474 | | D42 | 53 | Queens Gambit Declined, Semi-Tarrasch, 7.Bd3 | 405 | | D43 | 407 | Queens Gambit Declined, Semi-Slav Defense | 524 | | D44 | 117 | Queens Gambit Declined, Semi-Slav 5.Bg5 dxc4 | 505 | | D45 | 349 | Queens Gambit Declined, Semi-Slav 5.e3 | 538 | | D46 | 93 | Queens Gambit Declined, Semi-Slav 6.Bd3 | 355 | | D47 | 115 | Queens Gambit Declined, Semi-Slav 7.Bc4 | 644 | | D48 | 44 | Queens Gambit Declined, Meran, 8...a6 | 709 | | D49 | 30 | Queens Gambit Declined, Meran, 11.Nxb5 | 604 | | D50 | 1457 | Queens Gambit Declined, 4.Bg5 | 452 | | D51 | 3056 | Queens Gambit Declined, 4.Bg5 Nbd7 Cambridge Springs Defense | 460 | | D52 | 898 | Queens Gambit Declined | 509 | | D53 | 2415 | Queens Gambit Declined, 4.Bg5 Be7 | 409 | | D54 | 2589 | Queens Gambit Declined, Anti-neo-Orthodox variation | 503 | | D55 | 687 | Queens Gambit Declined, 6.Nf3 | 436 | | D56 | 169 | Queens Gambit Declined, Lasker defense | 464 | | D57 | 57 | Queens Gambit Declined, Lasker defense, Main line | 443 | | D58 | 387 | Queens Gambit Declined, Tartakower Makagonov-Bondarevsky system | 456 | | D59 | 232 | Queens Gambit Declined, Tartakower Makagonov-Bondarevsky system, 8.cd Nxd5 | 517 | | D60 | 244 | Queens Gambit Declined, Orthodox defense | 569 | | D61 | 185 | Queens Gambit Declined, Orthodox defense, Rubinstein variation | 485 | | D62 | 25 | Queens Gambit Declined, Orthodox defense, 7.Qc2 c5, 8.cd Rubinstein | 471 | | D63 | 150 | Queens Gambit Declined, Orthodox defense, 7.Rc1 | 538 | | D64 | 76 | Queens Gambit Declined, Orthodox defense, Rubinstein attack with Rc1 | 512 | | D65 | 2 | Queens Gambit Declined, Orthodox defense, Rubinstein attack, Main line | 523 | | D66 | 80 | Queens Gambit Declined, Orthodox defense, Bd3 line | 378 | | D67 | 47 | Queens Gambit Declined, Orthodox defense, Bd3 line, Capablanca freeing manoeuver | 501 | | D68 | 86 | Queens Gambit Declined, Orthodox defense, Classical variation | 547 | | D69 | 39 | Queens Gambit Declined, Orthodox defense, Classical, 13.dxe5 | 432 | | D70 | 1215 | Neo-Grunfeld Defence, Ziegler Variant | 535 | | D71 | 259 | Neo-Grunfeld, 5.cd | 514 | | D72 | 29 | Neo-Grunfeld, 5.cd, Main line | 472 | | D73 | 3 | Neo-Grunfeld, 5.Nf3 | 603 | | D74 | 3 | Neo-Grunfeld, 6.cd Nxd5, 7.O-O | 401 | | D75 | 3 | Neo-Grunfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3 | 552 | | D76 | 4 | Neo-Grunfeld, 6.cd Nxd5, 7.O-O Nb6 | 380 | | D77 | 8 | Neo-Grunfeld, 6.O-O | 627 | | D78 | 4 | Neo-Grunfeld, 6.O-O c6 | 464 | | D79 | 10 | Neo-Grunfeld, 6.O-O, Main line | 480 | | D80 | 2626 | Grunfeld Defence | 582 | | D81 | 299 | Grunfeld, Russian variation | 484 | | D82 | 1647 | Grunfeld 4.Bf4, Eskimo variant | 466 | | D83 | 562 | Grunfeld gambit | 501 | | D84 | 272 | Grunfeld gambit accepted | 448 | | D85 | 8743 | Grunfeld, exchange variation | 573 | | D86 | 4551 | Grunfeld, Exchange, Classical variation | 551 | | D87 | 907 | Grunfeld, Exchange, Spassky variation | 545 | | D88 | 109 | Grunfeld, Spassky variation, Main line, 10...cd, 11.cd | 559 | | D89 | 65 | Grunfeld, Spassky variation, Main line, 13.Bd3 | 561 | | D90 | 1959 | Grunfeld, Three knights variation | 581 | | D91 | 2056 | Grunfeld, Three knights variation | 448 | | D92 | 649 | Grunfeld, 5.Bf4 | 453 | | D93 | 353 | Grunfeld with 5.Bf4 O-O 6.e3 | 612 | | D94 | 946 | Grunfeld, 5.e3 | 443 | | D95 | 185 | Grunfeld with 5.e3 O-O 6.Qb3 | 485 | | D96 | 190 | Grunfeld, Russian variation | 515 | | D97 | 2450 | Grunfeld, Russian variation with 7.e4 | 406 | | D98 | 301 | Grunfeld, Russian, Smyslov variation | 460 | | D99 | 225 | Grunfeld Defense, Smyslov, Main line | 540 | | E00 | 6591 | Queens Pawn Game including Neo-Indian Attack, Trompowski Attack, Catalan Opening and others | 507 | | E01 | 3772 | Catalan, closed | 573 | | E02 | 251 | Catalan, open, 5.Qa4 | 688 | | E03 | 104 | Catalan, open, Alekhine variation | 522 | | E04 | 808 | Catalan, Open, 5.Nf3 | 561 | | E05 | 928 | Catalan, Open, Classical line | 527 | | E06 | 1216 | Catalan, Closed, 5.Nf3 | 643 | | E07 | 87 | Catalan, Closed, 6...Nbd7 | 542 | | E08 | 121 | Catalan, Closed, 7.Qc2 | 586 | | E09 | 49 | Catalan, Closed, Main line | 459 | | E10 | 19211 | Queens Pawn Game 3.Nf3 | 562 | | E11 | 7589 | Bogo-Indian Defense | 489 | | E12 | 15571 | Queens Indian Defense | 484 | | E13 | 707 | Queens Indian, 4.Nc3, Main line | 467 | | E14 | 1713 | Queens Indian, 4.e3 | 566 | | E15 | 7394 | Queens Indian, 4.g3 | 468 | | E16 | 1397 | Queens Indian, Capablanca variation | 518 | | E17 | 1485 | Queens Indian, 5.Bg2 Be7 | 451 | | E18 | 860 | Queens Indian, Old Main line, 7.Nc3 | 636 | | E19 | 736 | Queens Indian, Old Main line, 9.Qxc3 | 587 | | E20 | 19827 | Nimzo-Indian Defense | 457 | | E21 | 3546 | Nimzo-Indian, Three knights variation | 450 | | E22 | 184 | Nimzo-Indian, Spielmann Variation | 498 | | E23 | 456 | Nimzo-Indian, Spielmann, 4...c5, 5.dc Nc6 | 614 | | E24 | 852 | Nimzo-Indian, Saemisch variation | 532 | | E25 | 774 | Nimzo-Indian, Saemisch variation, Keres variation | 531 | | E26 | 784 | Nimzo-Indian, Saemisch variation, 4.a3 Bxc3+ 5.bxc3 c5 6.e3 | 530 | | E27 | 305 | Nimzo-Indian, Saemisch variation, 5...0-0 | 492 | | E28 | 80 | Nimzo-Indian, Saemisch variation, 6.e3 | 725 | | E29 | 46 | Nimzo-Indian, Saemisch variation, Main line | 510 | | E30 | 2637 | Nimzo-Indian, Leningrad variation, | 487 | | E31 | 411 | Nimzo-Indian, Leningrad variation, main line | 644 | | E32 | 7754 | Nimzo-Indian, Classical variation | 572 | | E33 | 799 | Nimzo-Indian, Classical variation, 4...Nc6 | 479 | | E34 | 818 | Nimzo-Indian, Classical, Noa variation | 464 | | E35 | 700 | Nimzo-Indian, Classical, Noa variation, 5.cxd5 exd5 | 471 | | E36 | 252 | Nimzo-Indian, Classical, Noa variation, 5.a3 | 570 | | E37 | 365 | Nimzo-Indian, Classical, Noa variation, Main line, 7.Qc2 | 483 | | E38 | 2903 | Nimzo-Indian, Classical, 4...c5 | 460 | | E39 | 1488 | Nimzo-Indian, Classical, Pirc variation | 487 | | E40 | 1310 | Nimzo-Indian, 4.e3 | 495 | | E41 | 5193 | Nimzo-Indian, 4.e3 c5 | 476 | | E42 | 1833 | Nimzo-Indian, 4.e3 c5, 5.Ne2 Rubinstein | 569 | | E43 | 1755 | Nimzo-Indian, Fischer variation | 514 | | E44 | 1029 | Nimzo-Indian, Fischer variation, 5.Ne2 | 484 | | E45 | 749 | Nimzo-Indian, 4.e3, Bronstein Byrne variation | 381 | | E46 | 2019 | Nimzo-Indian, 4.e3 O-O | 477 | | E47 | 2129 | Nimzo-Indian, 4.e3 O-O, 5.Bd3 | 502 | | E48 | 3670 | Nimzo-Indian, 4.e3 O-O, 5.Bd3 d5 | 557 | | E49 | 581 | Nimzo-Indian, 4.e3, Botvinnik system | 556 | | E50 | 305 | Nimzo-Indian, 4.e3 e8g8, 5.Nf3, without ...d5 | 579 | | E51 | 93 | Nimzo-Indian, 4.e3 e8g8, 5.Nf3 d7d5 | 550 | | E52 | 38 | Nimzo-Indian, 4.e3, Main line with ...b6 | 618 | | E53 | 25 | Nimzo-Indian, 4.e3, Main line with ...c5 | 504 | | E54 | 41 | Nimzo-Indian, 4.e3, Gligoric system with 7...dc | 501 | | E55 | 42 | Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation | 486 | | E56 | 11 | Nimzo-Indian, 4.e3, Main line with 7...Nc6 | 583 | | E57 | 4 | Nimzo-Indian, 4.e3, Main line with 8...dxc4 and 9...Bxc4 cxd4 | 584 | | E58 | 32 | Nimzo-Indian, 4.e3, Main line with 8...Bxc3 | 469 | | E59 | 89 | Nimzo-Indian, 4.e3, Main line | 357 | | E60 | 15839 | Kings Indian Defense | 535 | | E61 | 7882 | Kings Indian Defense, 3.Nc3 | 422 | | E62 | 302 | Kings Indian, Fianchetto variation | 536 | | E63 | 218 | Kings Indian, Fianchetto, Panno variation | 583 | | E64 | 19 | Kings Indian, Fianchetto, Yugoslav system | 551 | | E65 | 15 | Kings Indian, Yugoslav, 7.O-O | 502 | | E66 | 18 | Kings Indian, Fianchetto, Yugoslav Panno | 481 | | E67 | 127 | Kings Indian, Fianchetto with ...Nd7 | 559 | | E68 | 104 | Kings Indian, Fianchetto, Classical variation, 8.e4 | 528 | | E69 | 83 | Kings Indian, Fianchetto, Classical Main line | 483 | | E70 | 9661 | Kings Indian, 4.e4 | 622 | | E71 | 8412 | Kings Indian, Makagonov system 5.h3 | 500 | | E72 | 395 | Kings Indian with e4 & g3 | 544 | | E73 | 11040 | Kings Indian, 5.Be2 | 595 | | E74 | 1729 | Kings Indian, Averbakh, 6...c5 | 509 | | E75 | 317 | Kings Indian, Averbakh, Main line | 474 | | E76 | 5440 | Kings Indian Defence, Four Pawns Attack | 551 | | E77 | 248 | Kings Indian, Four pawns attack, 6.Be2 | 556 | | E78 | 9 | Kings Indian, Four pawns attack, with Be2 and Nf3 | 635 | | E79 | 17 | Kings Indian, Four pawns attack, Main line | 521 | | E80 | 2096 | Kings Indian, Juarez variation | 535 | | E81 | 7103 | Kings Indian, Gonzales, 5...O-O | 440 | | E82 | 529 | Kings Indian, Smisch, double Fianchetto variation | 413 | | E83 | 1860 | Kings Indian, Smisch, 6...Nc6 | 401 | | E84 | 1107 | Kings Indian, Flank Panno Main line | 490 | | E85 | 683 | Kings Indian, Bezerker, Orthodox variation | 685 | | E86 | 811 | Kings Indian, Maniac, Orthodox, 7.Nge2 c6 | 459 | | E87 | 2037 | Kings Indian, Smisch, Orthodox, 7.d5 | 424 | | E88 | 1295 | Kings Indian, Smisch, Orthodox, 7.d5 c6 | 572 | | E89 | 101 | Kings Indian, Smisch, Orthodox Main line | 564 | | E90 | 2381 | Kings Indian, 5.Nf3 | 502 | | E91 | 3413 | Kings Indian, 6.Be2 | 523 | | E92 | 3598 | Kings Indian, Classical variation | 492 | | E93 | 425 | Kings Indian, Petrosian system, Main line | 518 | | E94 | 1177 | Kings Indian, Orthodox variation | 409 | | E95 | 453 | Kings Indian, Orthodox, 7...Nbd7, 8.Re1 | 473 | | E96 | 272 | Kings Indian, Orthodox, 7...Nbd7, Main line | 448 | | E97 | 4138 | Kings Indian, Orthodox, Aronin-Taimanov variation Yugoslav attack Mar del Plata variation | 494 | | E98 | 2461 | Kings Indian, Orthodox, Aronin-Taimanov, 9.Ne1 | 504 | | E99 | 376 | Kings Indian, Orthodox, Aronin-Taimanov, Main | 534 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