double-beep · January 4, 2025 19:56
diff --git a/all_games.txt b/all_games.txt
 Persistent variable 'ecos': Dictionary with 494 entries:
 <None>: 894
 A00: 691
 A01: 505
 A02: 38
 A03: 62
 A04: 1105
 A05: 2055
 A06: 598
 A07: 2183
 A08: 308
 A09: 422
 A10: 471
 A11: 351
 A12: 63
 A13: 1578
 A14: 466
 A15: 1922
 A16: 722
 A17: 543
 A18: 205
 A19: 64
 A20: 699
 A21: 372
 A22: 314
 A23: 47
 A24: 5
 A25: 268
 A26: 95
 A27: 71
 A28: 818
 A29: 1088
 A30: 1615
 A31: 121
 A32: 80
 A33: 637
 A34: 965
 A35: 317
 A36: 431
 A37: 563
 A38: 140
 A39: 87
 A40: 1116
 A41: 670
 A42: 143
 A43: 256
 A44: 20
 A45: 1392
 A46: 1416
 A47: 89
 A48: 1119
 A49: 452
 A50: 297
 A51: 3
 A52: 70
 A53: 163
 A54: 77
 A55: 60
 A56: 296
 A57: 245
 A58: 176
 A59: 59
 A60: 20
 A61: 220
 A62: 149
 A63: 37
 A64: 60
 A65: 39
 A66: 3
 A67: 44
 A68: 3
 A69: 10
 A70: 189
 A71: 1
 A72: 3
 A73: 11
 A74: 2
 A75: 15
 A77: 33
 A78: 11
 A79: 10
 A80: 266
 A81: 274
 A82: 2
 A83: 4
 A84: 84
 A85: 66
 A86: 20
 A87: 48
 A88: 188
 A89: 29
 A90: 259
 A91: 8
 A92: 12
 A93: 12
 A94: 3
 A95: 6
 A96: 30
 A97: 4
 A98: 2
 A99: 4
 B00: 782
 B01: 781
 B02: 87
 B03: 130
 B04: 283
 B05: 78
 B06: 899
 B07: 549
 B08: 601
 B09: 318
 B10: 1020
 B11: 420
 B12: 2085
 B13: 696
 B14: 551
 B15: 213
 B16: 33
 B17: 561
 B18: 695
 B19: 839
 B20: 382
 B21: 68
 B22: 1597
 B23: 817
 B24: 41
 B25: 81
 B26: 68
 B27: 208
 B28: 139
 B29: 129
 B30: 1696
 B31: 837
 B32: 498
 B33: 1454
 B34: 68
 B35: 357
 B36: 473
 B37: 16
 B38: 181
 B39: 57
 B40: 1776
 B41: 304
 B42: 754
 B43: 541
 B44: 191
 B45: 167
 B46: 599
 B47: 880
 B48: 581
 B49: 63
 B50: 617
 B51: 1027
 B52: 1112
 B53: 310
 B54: 182
 B55: 5
 B56: 272
 B57: 167
 B58: 126
 B59: 29
 B60: 98
 B61: 81
 B62: 40
 B63: 210
 B64: 47
 B65: 145
 B66: 306
 B67: 319
 B68: 26
 B69: 39
 B70: 138
 B71: 4
 B72: 35
 B73: 35
 B74: 26
 B75: 24
 B76: 249
 B77: 64
 B78: 81
 B79: 4
 B80: 150
 B81: 239
 B82: 63
 B83: 252
 B84: 372
 B85: 105
 B86: 14
 B87: 83
 B88: 33
 B89: 98
 B90: 2981
 B91: 291
 B92: 742
 B93: 242
 B94: 173
 B95: 28
 B96: 273
 B97: 253
 B98: 31
 B99: 61
 C00: 426
 C01: 537
 C02: 597
 C03: 423
 C04: 70
 C05: 159
 C06: 219
 C07: 997
 C08: 192
 C09: 227
 C10: 907
 C11: 1477
 C12: 127
 C13: 45
 C14: 82
 C15: 279
 C16: 160
 C17: 129
 C18: 183
 C19: 453
 C20: 27
 C21: 15
 C22: 22
 C23: 6
 C24: 343
 C25: 56
 C26: 193
 C27: 27
 C28: 17
 C29: 35
 C30: 6
 C31: 4
 C33: 27
 C34: 25
 C35: 3
 C36: 29
 C37: 3
 C38: 1
 C39: 12
 C40: 5
 C41: 707
 C42: 2669
 C43: 637
 C44: 202
 C45: 1409
 C46: 26
 C47: 999
 C48: 420
 C49: 223
 C50: 736
 C51: 54
 C52: 28
 C53: 28
 C54: 1947
 C55: 532
 C56: 76
 C57: 5
 C58: 81
 C59: 42
 C60: 252
 C61: 39
 C62: 16
 C63: 135
 C64: 131
 C65: 1750
 C66: 24
 C67: 3023
 C68: 93
 C69: 678
 C70: 191
 C71: 22
 C72: 170
 C73: 37
 C74: 39
 C75: 83
 C76: 117
 C77: 708
 C78: 977
 C79: 39
 C80: 546
 C81: 77
 C82: 95
 C83: 88
 C84: 789
 C85: 171
 C86: 54
 C87: 99
 C88: 940
 C89: 428
 C90: 176
 C91: 327
 C92: 1168
 C93: 45
 C94: 28
 C95: 602
 C96: 310
 C97: 158
 C98: 16
 C99: 201
 D00: 461
 D01: 239
 D02: 1828
 D03: 91
 D04: 82
 D05: 151
 D06: 70
 D07: 126
 D08: 21
 D09: 9
 D10: 1843
 D11: 2202
 D12: 1096
 D13: 311
 D14: 812
 D15: 1322
 D16: 393
 D17: 879
 D18: 87
 D19: 563
 D20: 912
 D21: 146
 D22: 134
 D23: 62
 D24: 72
 D25: 198
 D26: 307
 D27: 1209
 D28: 43
 D29: 49
 D30: 1017
 D31: 1224
 D32: 413
 D33: 74
 D34: 269
 D35: 1058
 D36: 119
 D37: 3555
 D38: 1774
 D39: 140
 D40: 40
 D41: 810
 D42: 85
 D43: 1448
 D44: 236
 D45: 1573
 D46: 823
 D47: 676
 D48: 100
 D49: 54
 D50: 33
 D51: 55
 D52: 296
 D53: 120
 D54: 15
 D55: 352
 D56: 316
 D57: 25
 D58: 656
 D59: 84
 D60: 47
 D61: 62
 D62: 38
 D63: 112
 D64: 7
 D65: 2
 D66: 17
 D67: 29
 D68: 12
 D69: 5
 D70: 90
 D71: 177
 D74: 33
 D75: 32
 D76: 120
 D77: 228
 D78: 418
 D79: 323
 D80: 369
 D81: 61
 D82: 163
 D83: 99
 D84: 50
 D85: 1809
 D86: 245
 D87: 139
 D88: 13
 D89: 35
 D90: 200
 D91: 204
 D92: 130
 D93: 73
 D94: 206
 D95: 28
 D96: 43
 D97: 332
 D98: 42
 D99: 25
 E00: 621
 E01: 154
 E02: 29
 E03: 20
 E04: 1256
 E05: 1663
 E06: 497
 E07: 44
 E08: 367
 E09: 90
 E10: 858
 E11: 2795
 E12: 2075
 E13: 29
 E14: 240
 E15: 2516
 E16: 370
 E17: 584
 E18: 643
 E19: 215
 E20: 545
 E21: 356
 E22: 11
 E23: 18
 E24: 30
 E25: 160
 E26: 18
 E27: 5
 E28: 20
 E29: 44
 E30: 83
 E31: 22
 E32: 1678
 E33: 76
 E34: 270
 E35: 256
 E36: 150
 E37: 147
 E38: 141
 E39: 225
 E40: 74
 E41: 214
 E42: 214
 E43: 211
 E44: 82
 E45: 52
 E46: 514
 E47: 146
 E48: 247
 E49: 126
 E50: 4
 E51: 114
 E52: 202
 E53: 257
 E54: 171
 E55: 150
 E56: 63
 E58: 104
 E59: 79
 E60: 1503
 E61: 213
 E62: 555
 E63: 351
 E64: 98
 E65: 81
 E66: 23
 E67: 114
 E68: 270
 E69: 113
 E70: 346
 E71: 234
 E72: 2
 E73: 277
 E74: 57
 E75: 12
 E76: 63
 E77: 30
 E79: 1
 E80: 46
 E81: 405
 E82: 10
 E83: 40
 E84: 71
 E85: 1
 E86: 43
 E87: 43
 E89: 2
 E90: 264
 E91: 276
 E92: 735
 E93: 14
 E94: 810
 E95: 49
 E96: 20
 E97: 676
 E98: 150
 E99: 24

 Persistent variable 'openings': Dictionary with 1894 entries:
 <None>: 894
 Alekhine Defense: 16
 Alekhine Defense: Balogh Variation: 3
 Alekhine Defense: Brooklyn Variation: 3
 Alekhine Defense: Exchange Variation: 76
 Alekhine Defense: Exchange Variation, Voronezh Variation: 12
 Alekhine Defense: Four Pawns Attack: 10
 Alekhine Defense: Four Pawns Attack, Fianchetto Variation: 2
 Alekhine Defense: Four Pawns Attack, Main Line: 12
 Alekhine Defense: Four Pawns Attack, Trifunovic Variation: 2
 Alekhine Defense: Kmoch Variation: 5
 Alekhine Defense: Maróczy Variation: 9
 Alekhine Defense: Modern Variation: 24
 Alekhine Defense: Modern Variation, Alburt Variation: 55
 Alekhine Defense: Modern Variation, Alekhine Variation: 2
 Alekhine Defense: Modern Variation, Flohr Variation: 12
 Alekhine Defense: Modern Variation, Keres Variation: 7
 Alekhine Defense: Modern Variation, Larsen Variation: 175
 Alekhine Defense: Modern Variation, Larsen-Haakert Variation: 12
 Alekhine Defense: Modern Variation, Main Line: 63
 Alekhine Defense: Modern Variation, Panov Variation: 1
 Alekhine Defense: Modern Variation, Schmid Variation: 10
 Alekhine Defense: Normal Variation: 9
 Alekhine Defense: Scandinavian Variation: 33
 Alekhine Defense: Spielmann Gambit: 2
 Alekhine Defense: Sämisch Attack: 12
 Alekhine Defense: Two Pawns Attack, Lasker Variation: 11
 Amar Opening: 3
 Anderssen's Opening: 25
 Australian Defense: 1
 Barnes Opening: 4
 Benko Gambit: 18
 Benko Gambit Accepted: Dlugy Variation: 26
 Benko Gambit Accepted: Fianchetto Variation: 58
 Benko Gambit Accepted: Fully Accepted Variation: 114
 Benko Gambit Accepted: King Walk Variation: 51
 Benko Gambit Accepted: Modern Variation: 40
 Benko Gambit Accepted: Pawn Return Variation: 58
 Benko Gambit Accepted: Yugoslav: 2
 Benko Gambit Declined: Bishop Attack: 3
 Benko Gambit Declined: Main Line: 76
 Benko Gambit Declined: Pseudo-Sämisch: 1
 Benko Gambit Declined: Quiet Line: 18
 Benko Gambit Declined: Sosonko Variation: 3
 Benko Gambit: Fianchetto Variation: 4
 Benko Gambit: Zaitsev System: 4
 Benko Gambit: Zaitsev Variation, Nescafe Frappe Attack: 4
 Benoni Defense: 300
 Benoni Defense: Benoni Gambit Accepted: 5
 Benoni Defense: Benoni Gambit, Schlenker Defense: 1
 Benoni Defense: Benoni-Indian Defense: 17
 Benoni Defense: Benoni-Indian Defense, Kingside Move Order: 77
 Benoni Defense: Classical Variation: 62
 Benoni Defense: Classical Variation, Argentine Counterattack: 15
 Benoni Defense: Classical Variation, Averbakh-Grivas Attack: 1
 Benoni Defense: Classical Variation, Czerniak Defense: 21
 Benoni Defense: Classical Variation, Czerniak Defense, Tal Line: 33
 Benoni Defense: Classical Variation, Full Line: 2
 Benoni Defense: Classical Variation, Main Line: 11
 Benoni Defense: Classical Variation, New York Variation: 129
 Benoni Defense: Classical Variation, Traditional Variation: 1
 Benoni Defense: Czech Benoni Defense: 72
 Benoni Defense: Fianchetto Variation: 152
 Benoni Defense: Fianchetto Variation, Hastings Defense: 37
 Benoni Defense: Fianchetto Variation, Hastings Defense, Main Line: 60
 Benoni Defense: Four Pawns Attack: 3
 Benoni Defense: Four Pawns Attack, Main Line: 10
 Benoni Defense: French Benoni: 12
 Benoni Defense: Hromádka System: 36
 Benoni Defense: King's Indian System: 9
 Benoni Defense: King's Pawn Line: 39
 Benoni Defense: Knight's Tour Variation: 64
 Benoni Defense: Mikenas Variation: 3
 Benoni Defense: Modern Variation: 6
 Benoni Defense: Modern Variation, Snake Variation: 14
 Benoni Defense: Old Benoni: 75
 Benoni Defense: Old Benoni, Mujannah Formation: 5
 Benoni Defense: Old Benoni, Schmid Variation: 4
 Benoni Defense: Semi-Benoni: 14
 Benoni Defense: Taimanov Variation: 44
 Benoni Defense: Uhlmann Variation: 8
 Benoni Defense: Woozle: 1
 Bird Opening: 33
 Bird Opening: Dutch Variation: 62
 Bird Opening: From's Gambit: 1
 Bird Opening: Horsefly Defense: 1
 Bird Opening: Myers Defense: 2
 Bird Opening: Wagner-Zwitersch Gambit: 1
 Bishop's Opening: 2
 Bishop's Opening: Berlin Defense: 217
 Bishop's Opening: Boden-Kieseritzky Gambit: 1
 Bishop's Opening: Boi Variation: 1
 Bishop's Opening: Philidor Counterattack: 3
 Bishop's Opening: Urusov Gambit: 1
 Bishop's Opening: Urusov Gambit, Panov Variation: 1
 Bishop's Opening: Vienna Hybrid: 125
 Bishop's Opening: Vienna Hybrid, Hromádka Variation: 17
 Bishop's Opening: Vienna Hybrid, Spielmann Attack: 35
 Blackmar-Diemer Gambit: 1
 Blackmar-Diemer Gambit: Reversed Albin Countergambit: 1
 Blumenfeld Countergambit: 11
 Blumenfeld Countergambit Accepted: 23
 Blumenfeld Countergambit: Duz-Khotimirsky Variation: 38
 Blumenfeld Countergambit: Spielmann Variation: 8
 Bogo-Indian Defense: 2
 Bogo-Indian Defense: Exchange Variation: 260
 Bogo-Indian Defense: Grünfeld Variation: 721
 Bogo-Indian Defense: Monticelli Trap: 8
 Bogo-Indian Defense: Nimzowitsch Variation: 384
 Bogo-Indian Defense: Retreat Variation: 947
 Bogo-Indian Defense: Vitolins Variation: 236
 Bogo-Indian Defense: Wade-Smyslov Variation: 237
 Bongcloud Attack: 3
 Borg Defense: 1
 Caro-Kann Defense: 93
 Caro-Kann Defense: Accelerated Panov Attack: 27
 Caro-Kann Defense: Accelerated Panov Attack, Modern Variation: 295
 Caro-Kann Defense: Accelerated Panov Attack, Open Variation: 30
 Caro-Kann Defense: Advance Variation: 338
 Caro-Kann Defense: Advance Variation, Bayonet Attack: 12
 Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense: 258
 Caro-Kann Defense: Advance Variation, Bronstein Variation: 3
 Caro-Kann Defense: Advance Variation, Short Variation: 937
 Caro-Kann Defense: Advance Variation, Tal Variation: 267
 Caro-Kann Defense: Advance Variation, Van der Wiel Attack: 109
 Caro-Kann Defense: Advance Variation, Van der Wiel Attack, Dreyev Defense: 11
 Caro-Kann Defense: Advance, Short Variation: 1
 Caro-Kann Defense: Apocalypse Attack: 36
 Caro-Kann Defense: Breyer Variation: 121
 Caro-Kann Defense: Breyer Variation, Stein Attack: 7
 Caro-Kann Defense: Bronstein-Larsen Variation: 33
 Caro-Kann Defense: Classical Variation: 380
 Caro-Kann Defense: Classical Variation, Flohr Variation: 111
 Caro-Kann Defense: Classical Variation, Lobron System: 241
 Caro-Kann Defense: Classical Variation, Main Line: 235
 Caro-Kann Defense: Classical Variation, Maróczy Attack: 1
 Caro-Kann Defense: Classical Variation, Seirawan Variation: 26
 Caro-Kann Defense: Classical Variation, Spassky Variation: 540
 Caro-Kann Defense: De Bruycker Defense: 7
 Caro-Kann Defense: Edinburgh Variation: 2
 Caro-Kann Defense: Endgame Offer: 71
 Caro-Kann Defense: Endgame Variation: 79
 Caro-Kann Defense: Euwe Attack: 2
 Caro-Kann Defense: Exchange Variation: 299
 Caro-Kann Defense: Exchange Variation, Rubinstein Variation: 97
 Caro-Kann Defense: Forgacs Variation: 34
 Caro-Kann Defense: Goldman Variation: 5
 Caro-Kann Defense: Gurgenidze Counterattack: 2
 Caro-Kann Defense: Gurgenidze System: 28
 Caro-Kann Defense: Hector Gambit: 1
 Caro-Kann Defense: Hillbilly Attack: 1
 Caro-Kann Defense: Hillbilly Attack, Schaeffer Gambit: 1
 Caro-Kann Defense: Karpov Variation: 209
 Caro-Kann Defense: Karpov Variation, Modern Main Line: 154
 Caro-Kann Defense: Karpov Variation, Modern Variation: 29
 Caro-Kann Defense: Karpov Variation, Modern Variation, Ivanchuk Defense: 6
 Caro-Kann Defense: Karpov Variation, Modern Variation, Kasparov Attack: 52
 Caro-Kann Defense: Karpov Variation, Smyslov Variation: 47
 Caro-Kann Defense: Karpov Variation, Smyslov Variation, Main Line: 38
 Caro-Kann Defense: Karpov Variation, Tiviakov-Fischer Attack: 26
 Caro-Kann Defense: Main Line: 4
 Caro-Kann Defense: Maróczy Variation: 111
 Caro-Kann Defense: Maróczy Variation, Maróczy Gambit: 1
 Caro-Kann Defense: Modern Variation: 17
 Caro-Kann Defense: Panov Attack: 103
 Caro-Kann Defense: Panov Attack, Fianchetto Defense: 76
 Caro-Kann Defense: Panov Attack, Fianchetto Defense, Fianchetto Gambit: 7
 Caro-Kann Defense: Panov Attack, Main Line: 371
 Caro-Kann Defense: Panov Attack, Modern Defense: 120
 Caro-Kann Defense: Panov Attack, Modern Defense, Carlsbad Line: 34
 Caro-Kann Defense: Panov Attack, Modern Defense, Czerniak Line: 15
 Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line: 123
 Caro-Kann Defense: Panov-Botvinnik, Herzog Defense: 2
 Caro-Kann Defense: Rasa-Studier Gambit: 1
 Caro-Kann Defense: Tartakower Variation: 137
 Caro-Kann Defense: Toikkanen Gambit: 3
 Caro-Kann Defense: Two Knights Attack: 266
 Caro-Kann Defense: Two Knights Attack, Mindeno Variation: 27
 Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line: 368
 Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Retreat Line: 25
 Carr Defense: 1
 Catalan Opening: 607
 Catalan Opening: Closed: 1035
 Catalan Opening: Closed Variation, Traditional Variation: 46
 Catalan Opening: Closed, Botvinnik Variation: 26
 Catalan Opening: Closed, Main Line: 44
 Catalan Opening: Closed, Spassky Gambit: 1
 Catalan Opening: Open Defense: 1129
 Catalan Opening: Open Defense, Alekhine Variation: 7
 Catalan Opening: Open Defense, Classical Line: 1663
 Catalan Opening: Open Defense, Modern Sharp Variation: 169
 Center Game: Berger Variation: 13
 Center Game: Hall Variation: 4
 Center Game: Kieseritzky Variation: 11
 Center Game: Paulsen Attack Variation: 5
 Clemenz Opening: 4
 Colle System: Rhamphorhynchus Variation: 1
 Czech Defense: 62
 Danish Gambit Accepted: 1
 Danish Gambit Declined: Sörensen Defense: 3
 Dutch Defense: 123
 Dutch Defense: Alapin Variation: 1
 Dutch Defense: Alekhine Variation: 7
 Dutch Defense: Blackburne Variation: 3
 Dutch Defense: Blackmar's Second Gambit: 1
 Dutch Defense: Classical Variation: 157
 Dutch Defense: Classical Variation, Blackburne Attack: 1
 Dutch Defense: Classical Variation, Buenos Aires Variation: 8
 Dutch Defense: Classical Variation, Huisl Variation: 16
 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation: 2
 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Alatortsev-Lisitsyn Line: 2
 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Modern Main Line: 4
 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Winter Variation: 2
 Dutch Defense: Fianchetto Attack: 51
 Dutch Defense: Fianchetto Variation: 2
 Dutch Defense: Hopton Attack: 43
 Dutch Defense: Korchnoi Attack: 1
 Dutch Defense: Leningrad Variation: 66
 Dutch Defense: Leningrad Variation, Carlsbad Variation: 1
 Dutch Defense: Leningrad Variation, Matulovic Variation: 29
 Dutch Defense: Leningrad Variation, Warsaw Variation: 188
 Dutch Defense: Manhattan Gambit, Anti-Classical Line: 3
 Dutch Defense: Nimzo-Dutch Variation: 15
 Dutch Defense: Nimzo-Dutch Variation, Alekhine Variation: 3
 Dutch Defense: Normal Variation: 13
 Dutch Defense: Queen's Knight Variation: 66
 Dutch Defense: Raphael Variation: 68
 Dutch Defense: Rubinstein Variation: 38
 Dutch Defense: Semi-Leningrad Variation: 219
 Dutch Defense: Staunton Gambit: 4
 Dutch Defense: Stonewall Variation: 14
 Dutch Defense: Stonewall Variation, Botvinnik Variation: 12
 Dutch Defense: Stonewall Variation, Modern Variation: 127
 East Indian Defense: 325
 Elephant Gambit: 1
 English Defense: 237
 English Defense: Perrin Variation: 32
 English Opening: 126
 English Opening: Adorjan Defense: 32
 English Opening: Agincourt Defense: 681
 English Opening: Agincourt Defense, Bogoljubow Defense: 2
 English Opening: Agincourt Defense, Catalan Defense: 6
 English Opening: Agincourt Defense, Catalan Defense Accepted: 461
 English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense: 12
 English Opening: Agincourt Defense, Keres Defense: 98
 English Opening: Agincourt Defense, Kurajica Defense: 9
 English Opening: Agincourt Defense, Neo-Catalan Declined: 353
 English Opening: Agincourt Defense, Tarrasch Defense: 17
 English Opening: Agincourt Defense, Wimpy System: 72
 English Opening: Anglo-Dutch Defense: 75
 English Opening: Anglo-Dutch Defense, Hickmann Gambit: 1
 English Opening: Anglo-Grünfeld Defense: 20
 English Opening: Anglo-Indian Defense: 218
 English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation: 556
 English Opening: Anglo-Indian Defense, Anti-Anti-Grünfeld: 39
 English Opening: Anglo-Indian Defense, Flohr-Mikenas-Carls Variation, Nei Gambit: 49
 English Opening: Anglo-Indian Defense, Grünfeld Formation: 4
 English Opening: Anglo-Indian Defense, Hedgehog System: 23
 English Opening: Anglo-Indian Defense, King's Indian Formation: 500
 English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto: 67
 English Opening: Anglo-Indian Defense, King's Knight Variation: 565
 English Opening: Anglo-Indian Defense, Nimzo-English: 397
 English Opening: Anglo-Indian Defense, Old Indian Formation: 18
 English Opening: Anglo-Indian Defense, Queen's Indian Formation: 525
 English Opening: Anglo-Indian Defense, Queen's Indian Variation: 12
 English Opening: Anglo-Indian Defense, Queen's Knight Variation: 146
 English Opening: Anglo-Indian Defense, Romanishin Variation: 31
 English Opening: Anglo-Indian Defense, Scandinavian Defense: 3
 English Opening: Anglo-Indian Defense, Slav Formation: 42
 English Opening: Anglo-Indian Defense, Zvjaginsev-Krasenkow Attack: 21
 English Opening: Anglo-Lithuanian Variation: 2
 English Opening: Anglo-Scandinavian Defense: 1
 English Opening: Carls-Bremen System: 24
 English Opening: Caro-Kann Defensive System: 351
 English Opening: Closed, Taimanov Variation: 2
 English Opening: Drill Variation: 3
 English Opening: Four Knights System, Nimzowitsch Variation: 140
 English Opening: Great Snake Variation: 228
 English Opening: Jaenisch Gambit: 1
 English Opening: King's English Variation: 696
 English Opening: King's English Variation, Adhiban Gambit: 11
 English Opening: King's English Variation, Bellon Gambit: 2
 English Opening: King's English Variation, Botvinnik System: 46
 English Opening: King's English Variation, Botvinnik System, Prickly Pawn Pass System: 5
 English Opening: King's English Variation, Bremen-Hort Variation: 7
 English Opening: King's English Variation, Closed System: 21
 English Opening: King's English Variation, Closed System, Full Symmetry: 49
 English Opening: King's English Variation, Four Knights Variation: 53
 English Opening: King's English Variation, Four Knights Variation, Bradley Beach Variation: 1
 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line: 599
 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, Delayed .. Nc6: 13
 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Bc5: 40
 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6: 436
 English Opening: King's English Variation, Four Knights Variation, Flexible Line: 159
 English Opening: King's English Variation, Four Knights Variation, Korchnoi Line: 166
 English Opening: King's English Variation, Four Knights Variation, Quiet Line: 299
 English Opening: King's English Variation, Hungarian Attack: 71
 English Opening: King's English Variation, Keres Defense: 1
 English Opening: King's English Variation, Kramnik-Shirov Counterattack: 246
 English Opening: King's English Variation, Nimzowitsch Variation: 16
 English Opening: King's English Variation, Nimzowitsch-Flohr Variation: 17
 English Opening: King's English Variation, Reversed Closed Sicilian: 65
 English Opening: King's English Variation, Reversed Sicilian: 79
 English Opening: King's English Variation, Smyslov Defense: 3
 English Opening: King's English Variation, Taimanov Variation: 102
 English Opening: King's English Variation, Three Knights System: 71
 English Opening: King's English Variation, Troger Defense: 10
 English Opening: King's English Variation, Two Knights Variation: 89
 English Opening: King's English Variation, Two Knights Variation, Fianchetto Line: 5
 English Opening: King's English Variation, Two Knights Variation, Keres Variation: 47
 English Opening: King's English Variation, Two Knights Variation, Reversed Dragon: 33
 English Opening: King's English Variation, Two Knights Variation, Smyslov System: 155
 English Opening: Mikenas-Carls Variation: 205
 English Opening: Mikenas-Carls, Sicilian: 15
 English Opening: Neo-Catalan: 210
 English Opening: Neo-Catalan Declined: 13
 English Opening: Romanishin Gambit: 95
 English Opening: Symmetrical Variation: 1042
 English Opening: Symmetrical Variation, Anti-Benoni Variation: 121
 English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation: 148
 English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense: 569
 English Opening: Symmetrical Variation, Botvinnik System: 18
 English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3: 196
 English Opening: Symmetrical Variation, Botvinnik System Reversed, with e3: 28
 English Opening: Symmetrical Variation, Double Fianchetto: 1
 English Opening: Symmetrical Variation, Duchamp Variation: 43
 English Opening: Symmetrical Variation, Fianchetto Variation: 53
 English Opening: Symmetrical Variation, Four Knights Variation: 289
 English Opening: Symmetrical Variation, Full Symmetry Line: 96
 English Opening: Symmetrical Variation, Hedgehog Defense: 569
 English Opening: Symmetrical Variation, Mecking Variation: 87
 English Opening: Symmetrical Variation, Normal Variation: 29
 English Opening: Symmetrical Variation, Rubinstein Variation: 181
 English Opening: Symmetrical Variation, Three Knights Variation: 642
 English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation: 367
 English Opening: Symmetrical Variation, Two Knights Variation: 28
 English Opening: Symmetrical Variation, Two Knights, Fianchetto Variation: 3
 English Opening: Symmetrical Variation, Ultra-Symmetrical Variation: 382
 English Opening: Symmetrical, Hedgehog, Flexible Formation: 64
 Englund Gambit Declined: Reversed French: 2
 Englund Gambit: Mosquito Gambit: 1
 Four Knights Game: 90
 Four Knights Game: Glek System: 106
 Four Knights Game: Gunsberg Variation: 55
 Four Knights Game: Halloween Gambit: 2
 Four Knights Game: Italian Variation: 7
 Four Knights Game: Scotch Variation: 10
 Four Knights Game: Scotch Variation Accepted: 692
 Four Knights Game: Scotch Variation, Belgrade Gambit: 10
 Four Knights Game: Scotch Variation, Krause Gambit: 10
 Four Knights Game: Scotch Variation, Krause Gambit, Leonhardt Defense: 2
 Four Knights Game: Scotch Variation, Schmid Defense: 16
 Four Knights Game: Spanish Variation: 116
 Four Knights Game: Spanish Variation, Classical Variation: 35
 Four Knights Game: Spanish Variation, Double Spanish: 18
 Four Knights Game: Spanish Variation, Janowski Variation: 12
 Four Knights Game: Spanish Variation, Nimzowitsch Variation: 35
 Four Knights Game: Spanish Variation, Ranken Variation: 1
 Four Knights Game: Spanish Variation, Rubinstein Variation: 143
 Four Knights Game: Spanish Variation, Rubinstein Variation Accepted: 109
 Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation: 28
 Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall Gambit: 27
 Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall Variation: 1
 Four Knights Game: Spanish Variation, Symmetrical Variation: 80
 Four Knights Game: Spanish Variation, Symmetrical Variation, Blake Variation: 3
 Four Knights Game: Spanish Variation, Symmetrical Variation, Metger Unpin: 35
 French Defense: 9
 French Defense: Advance Variation: 50
 French Defense: Advance Variation, Euwe Variation: 219
 French Defense: Advance Variation, Extended Bishop Swap: 4
 French Defense: Advance Variation, Lputian Variation: 56
 French Defense: Advance Variation, Main Line: 100
 French Defense: Advance Variation, Milner-Barry Gambit: 3
 French Defense: Advance Variation, Milner-Barry Gambit, Hector Variation: 7
 French Defense: Advance Variation, Milner-Barry Gambit, Main Line: 6
 French Defense: Advance Variation, Nimzowitsch System: 2
 French Defense: Advance Variation, Paulsen Attack: 79
 French Defense: Advance Variation, Ruisdonk Gambit: 2
 French Defense: Advance Variation, Wade Variation: 69
 French Defense: Alekhine-Chatard Attack: 20
 French Defense: Alekhine-Chatard Attack, Albin-Chatard Gambit: 7
 French Defense: Alekhine-Chatard Attack, Breyer Variation: 5
 French Defense: Alekhine-Chatard Attack, Maróczy Variation: 1
 French Defense: Alekhine-Chatard Attack, Spielmann Variation: 8
 French Defense: Bird Invitation: 1
 French Defense: Burn Variation: 424
 French Defense: Chigorin Variation: 61
 French Defense: Classical Variation: 2
 French Defense: Classical Variation, Alapin Variation: 2
 French Defense: Classical Variation, Burn Variation, Main Line: 67
 French Defense: Classical Variation, Burn Variation, Morozevich Line: 143
 French Defense: Classical Variation, Delayed Exchange Variation: 6
 French Defense: Classical Variation, Pollock Variation: 1
 French Defense: Classical Variation, Richter Attack: 1
 French Defense: Classical Variation, Rubinstein Variation: 2
 French Defense: Classical Variation, Stahlberg Variation: 2
 French Defense: Classical Variation, Steinitz Variation: 157
 French Defense: Classical Variation, Svenonius Variation: 2
 French Defense: Classical Variation, Swiss Variation: 7
 French Defense: Classical Variation, Tartakower Variation: 2
 French Defense: Classical Variation, Vistaneckis Variation: 1
 French Defense: Exchange Variation: 470
 French Defense: Exchange Variation, Monte Carlo Variation: 59
 French Defense: Exchange Variation, Svenonius Variation: 8
 French Defense: Franco-Sicilian Defense: 2
 French Defense: Horwitz Attack: 1
 French Defense: Horwitz Attack, Papa-Ticulat Gambit: 7
 French Defense: King's Indian Attack: 190
 French Defense: Knight Variation: 18
 French Defense: La Bourdonnais Variation: 11
 French Defense: MacCutcheon Variation, Advance Variation: 1
 French Defense: MacCutcheon Variation, Bernstein Variation: 6
 French Defense: MacCutcheon Variation, Dr. Olland Variation: 11
 French Defense: MacCutcheon Variation, Duras Variation: 1
 French Defense: MacCutcheon Variation, Exchange Variation: 13
 French Defense: MacCutcheon Variation, Janowski Variation: 22
 French Defense: MacCutcheon Variation, Lasker Variation: 73
 French Defense: MacCutcheon Variation, Wolf Gambit: 5
 French Defense: Normal Variation: 12
 French Defense: Orthoschnapp Gambit: 1
 French Defense: Paulsen Variation: 80
 French Defense: Pelikan Variation: 1
 French Defense: Reversed Philidor Formation: 2
 French Defense: Rubinstein Variation: 13
 French Defense: Rubinstein Variation, Blackburne Defense: 492
 French Defense: Rubinstein Variation, Capablanca Line: 6
 French Defense: Rubinstein Variation, Fort Knox Variation: 199
 French Defense: Rubinstein Variation, Kasparov Attack: 115
 French Defense: Schlechter Variation: 41
 French Defense: St. George Defense: 9
 French Defense: St. George Defense, Three Pawn Attack: 3
 French Defense: Steiner Variation: 25
 French Defense: Steinitz Variation: 78
 French Defense: Steinitz Variation, Boleslavsky Variation: 667
 French Defense: Steinitz Variation, Gledhill Attack: 1
 French Defense: Tarrasch Variation: 50
 French Defense: Tarrasch Variation, Botvinnik Variation: 20
 French Defense: Tarrasch Variation, Chistyakov Defense: 279
 French Defense: Tarrasch Variation, Chistyakov Defense, Modern Line: 172
 French Defense: Tarrasch Variation, Closed Variation: 107
 French Defense: Tarrasch Variation, Closed Variation, Main Line: 217
 French Defense: Tarrasch Variation, Eliskases Variation: 57
 French Defense: Tarrasch Variation, Guimard Defense: 7
 French Defense: Tarrasch Variation, Guimard Defense, Main Line: 70
 French Defense: Tarrasch Variation, Haberditz Variation: 1
 French Defense: Tarrasch Variation, Leningrad Variation: 2
 French Defense: Tarrasch Variation, Modern System: 140
 French Defense: Tarrasch Variation, Morozevich Variation: 225
 French Defense: Tarrasch Variation, Open System: 189
 French Defense: Tarrasch Variation, Open System, Advance Line: 9
 French Defense: Tarrasch Variation, Open System, Euwe-Keres Line: 478
 French Defense: Tarrasch Variation, Open System, Main Line: 227
 French Defense: Tarrasch Variation, Open System, Süchting Line: 5
 French Defense: Tarrasch Variation, Pawn Center Variation: 32
 French Defense: Two Knights Variation: 26
 French Defense: Winawer Variation: 49
 French Defense: Winawer Variation, Advance Variation: 278
 French Defense: Winawer Variation, Advance Variation, Moscow Variation: 5
 French Defense: Winawer Variation, Alekhine Gambit Accepted: 1
 French Defense: Winawer Variation, Alekhine Gambit, Kan Variation: 13
 French Defense: Winawer Variation, Alekhine-Maróczy Gambit: 54
 French Defense: Winawer Variation, Bogoljubow Variation: 25
 French Defense: Winawer Variation, Bogoljubow Variation, Icelandic Defense: 2
 French Defense: Winawer Variation, Classical Variation: 58
 French Defense: Winawer Variation, Delayed Exchange Variation: 138
 French Defense: Winawer Variation, Eingorn Variation: 30
 French Defense: Winawer Variation, Exchange Variation, Canal Attack: 6
 French Defense: Winawer Variation, Fingerslip Variation: 5
 French Defense: Winawer Variation, Fingerslip Variation, Kunin Double Gambit: 5
 French Defense: Winawer Variation, Fingerslip Variation, Main Line: 1
 French Defense: Winawer Variation, Kondratiyev Variation: 1
 French Defense: Winawer Variation, Maróczy-Wallis Variation: 2
 French Defense: Winawer Variation, Petrosian Variation: 32
 French Defense: Winawer Variation, Poisoned Pawn Variation: 16
 French Defense: Winawer Variation, Poisoned Pawn Variation, Main Line: 51
 French Defense: Winawer Variation, Portisch-Hook Variation: 94
 French Defense: Winawer Variation, Positional Variation: 101
 French Defense: Winawer Variation, Retreat Variation: 22
 French Defense: Winawer Variation, Retreat Variation, Armenian Line: 68
 French Defense: Winawer Variation, Warsaw Variation: 141
 French Defense: Winawer Variation, Winckelmann-Reimer Gambit: 1
 French Defense: Wing Gambit: 5
 Goldsmith Defense: 2
 Grob Opening: 2
 Grob Opening: Grob Gambit: 2
 Grob Opening: Grob Gambit, Fritz Gambit: 1
 Grob Opening: Keene Defense: 1
 Grob Opening: Spike, Hurst Attack: 1
 Grünfeld Defense: 85
 Grünfeld Defense: Botvinnik Variation: 24
 Grünfeld Defense: Brinckmann Attack: 163
 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit: 8
 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit Accepted: 50
 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Botvinnik Variation: 14
 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Capablanca Variation: 70
 Grünfeld Defense: Brinckmann Attack, Reshevsky Gambit: 7
 Grünfeld Defense: Counterthrust Variation: 7
 Grünfeld Defense: Exchange Variation: 856
 Grünfeld Defense: Exchange Variation, Classical Variation: 222
 Grünfeld Defense: Exchange Variation, Larsen Variation: 4
 Grünfeld Defense: Exchange Variation, Modern Exchange Variation: 882
 Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Kramnik's Line: 48
 Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Pawn Grab Line: 5
 Grünfeld Defense: Exchange Variation, Nadanian Attack: 18
 Grünfeld Defense: Exchange Variation, Seville Variation: 32
 Grünfeld Defense: Exchange Variation, Simagin's Improved Variation: 13
 Grünfeld Defense: Exchange Variation, Simagin's Lesser Variation: 6
 Grünfeld Defense: Exchange Variation, Sokolsky Variation: 16
 Grünfeld Defense: Exchange Variation, Spassky Variation: 139
 Grünfeld Defense: Flohr Defense: 1
 Grünfeld Defense: Flohr Variation: 41
 Grünfeld Defense: Lutikov Variation: 1
 Grünfeld Defense: Makogonov Variation: 34
 Grünfeld Defense: Opocensky Variation: 34
 Grünfeld Defense: Pachman Variation: 1
 Grünfeld Defense: Russian Variation: 63
 Grünfeld Defense: Russian Variation, Accelerated Variation: 61
 Grünfeld Defense: Russian Variation, Byrne Variation: 58
 Grünfeld Defense: Russian Variation, Hungarian Variation: 166
 Grünfeld Defense: Russian Variation, Keres Variation: 1
 Grünfeld Defense: Russian Variation, Prins Variation: 76
 Grünfeld Defense: Russian Variation, Smyslov Variation: 61
 Grünfeld Defense: Russian Variation, Szabo Variation: 12
 Grünfeld Defense: Russian Variation, Yugoslav Variation: 5
 Grünfeld Defense: Smyslov Defense: 80
 Grünfeld Defense: Stockholm Variation: 282
 Grünfeld Defense: Three Knights Variation: 159
 Grünfeld Defense: Three Knights Variation, Burille Variation: 57
 Grünfeld Defense: Three Knights Variation, Burille Variation, Reversed Tarrasch: 24
 Grünfeld Defense: Three Knights Variation, Hungarian Attack: 130
 Grünfeld Defense: Three Knights Variation, Hungarian Variation: 73
 Grünfeld Defense: Three Knights Variation, Petrosian System: 204
 Grünfeld Defense: Three Knights Variation, Vienna Variation: 3
 Grünfeld Defense: Zaitsev Gambit: 1
 Gunderam Defense: 2
 Horwitz Defense: 222
 Hungarian Opening: 226
 Hungarian Opening: Catalan Formation: 2
 Hungarian Opening: Dutch Defense: 6
 Hungarian Opening: Indian Defense: 74
 Hungarian Opening: Reversed Modern Defense: 2
 Hungarian Opening: Sicilian Invitation: 45
 Hungarian Opening: Slav Formation: 65
 Hungarian Opening: Symmetrical Variation: 96
 Indian Defense: 367
 Indian Defense: Anti-Grünfeld, Adorjan Gambit: 2
 Indian Defense: Anti-Grünfeld, Advance Variation: 3
 Indian Defense: Anti-Grünfeld, Alekhine Variation: 97
 Indian Defense: Anti-Grünfeld, Alekhine Variation, Leko Gambit: 1
 Indian Defense: Anti-Grünfeld, Basman-Williams Attack: 21
 Indian Defense: Anti-Nimzo-Indian: 718
 Indian Defense: Budapest Defense: 9
 Indian Defense: Budapest Defense, Adler Variation: 25
 Indian Defense: Budapest Defense, Alekhine Variation: 1
 Indian Defense: Budapest Defense, Alekhine Variation, Abonyi Variation: 2
 Indian Defense: Budapest Defense, Fajarowicz Variation: 1
 Indian Defense: Budapest Defense, Rubinstein Variation: 35
 Indian Defense: Czech-Indian: 7
 Indian Defense: Devin Gambit: 2
 Indian Defense: Dzindzi-Indian Defense: 59
 Indian Defense: Döry Indian: 1
 Indian Defense: Gibbins-Weidenhagen Gambit Accepted: 1
 Indian Defense: King's Indian Variation, Fianchetto Variation: 108
 Indian Defense: Knights Variation: 384
 Indian Defense: Knights Variation, Alburt-Miles Variation: 4
 Indian Defense: London System: 273
 Indian Defense: Normal Variation: 46
 Indian Defense: Omega Gambit: 1
 Indian Defense: Polish Variation: 15
 Indian Defense: Przepiorka Variation: 452
 Indian Defense: Pseudo-Benko: 65
 Indian Defense: Reversed Chigorin Defense: 1
 Indian Defense: Seirawan Attack: 12
 Indian Defense: Spielmann-Indian: 69
 Indian Defense: Tartakower Attack: 38
 Indian Defense: Wade-Tartakower Defense: 194
 Indian Defense: West Indian Defense: 17
 Italian Game: 6
 Italian Game: Anti-Fried Liver Defense: 1
 Italian Game: Bird's Attack: 23
 Italian Game: Classical Variation: 3
 Italian Game: Classical Variation, Center Attack: 2
 Italian Game: Classical Variation, Closed Variation: 1
 Italian Game: Classical Variation, Giuoco Pianissimo: 848
 Italian Game: Classical Variation, Giuoco Pianissimo, Albin Variation: 11
 Italian Game: Classical Variation, Giuoco Pianissimo, Main Line: 89
 Italian Game: Classical Variation, Giuoco Pianissimo, with a5: 4
 Italian Game: Classical Variation, Giuoco Pianissimo, with a6: 275
 Italian Game: Classical Variation, Giuoco Pianissimo, with d6: 245
 Italian Game: Classical Variation, Giuoco Pianissimo, with h6: 173
 Italian Game: Classical Variation, Greco Gambit: 159
 Italian Game: Classical Variation, Greco Gambit, Anderssen Variation: 7
 Italian Game: Classical Variation, Greco Gambit, Moeller-Therkatz Attack: 3
 Italian Game: Classical Variation, Greco Gambit, Traditional Line: 130
 Italian Game: Classical Variation, La Bourdonnais Variation: 2
 Italian Game: Deutz Gambit: 11
 Italian Game: Evans Gambit Declined: 9
 Italian Game: Evans Gambit Declined, Showalter Variation: 4
 Italian Game: Evans Gambit, Anderssen Defense: 1
 Italian Game: Evans Gambit, Anderssen Variation: 3
 Italian Game: Evans Gambit, Anderssen Variation, Cordel Line: 31
 Italian Game: Evans Gambit, Bronstein Defense: 1
 Italian Game: Evans Gambit, Leonhardt Countergambit: 1
 Italian Game: Evans Gambit, Main Line: 2
 Italian Game: Evans Gambit, Mieses Defense: 1
 Italian Game: Evans Gambit, Pierce Defense: 4
 Italian Game: Evans Gambit, Stone-Ware Variation: 7
 Italian Game: Evans Gambit, Tartakower Attack: 18
 Italian Game: Giuoco Pianissimo: 15
 Italian Game: Giuoco Pianissimo, Canal Variation: 44
 Italian Game: Giuoco Pianissimo, Italian Four Knights Variation: 136
 Italian Game: Giuoco Pianissimo, Normal: 262
 Italian Game: Giuoco Piano: 227
 Italian Game: Hungarian Defense: 17
 Italian Game: Paris Defense: 16
 Italian Game: Scotch Gambit, Anderssen Attack: 18
 Italian Game: Scotch Gambit, Anderssen Attack, Main Line: 2
 Italian Game: Scotch Gambit, Double Gambit Accepted: 1
 Italian Game: Scotch Gambit, Janowski Defense: 2
 Italian Game: Scotch Gambit, Max Lange Attack: 43
 Italian Game: Scotch Gambit, Nakhmanson Gambit: 1
 Italian Game: Scotch Gambit, Walbrodt-Baird Gambit: 1
 Italian Game: Scotch Invitation Declined: 4
 Italian Game: Two Knights Defense: 7
 Italian Game: Two Knights Defense, Blackburne Variation: 2
 Italian Game: Two Knights Defense, Colman Variation: 4
 Italian Game: Two Knights Defense, Fritz Variation: 2
 Italian Game: Two Knights Defense, Fritz, Gruber Variation: 1
 Italian Game: Two Knights Defense, Knorre Variation: 1
 Italian Game: Two Knights Defense, Max Lange Attack: 2
 Italian Game: Two Knights Defense, Modern Bishop's Opening: 525
 Italian Game: Two Knights Defense, Paoli Variation: 2
 Italian Game: Two Knights Defense, Perreux Variation: 2
 Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line: 69
 Italian Game: Two Knights Defense, Polerio Defense, Bogoljubow Variation: 4
 Italian Game: Two Knights Defense, Polerio Defense, Göring Variation: 1
 Italian Game: Two Knights Defense, Polerio Defense, Suhle Defense: 17
 Italian Game: Two Knights Defense, Steinitz Variation: 23
 Italian Game: Two Knights Defense, Traxler Counterattack, Bishop Sacrifice Line: 2
 Kangaroo Defense: 238
 Kangaroo Defense: Keres Defense, Transpositional Variation: 28
 King's Gambit Accepted: Abbazia Defense: 26
 King's Gambit Accepted: Abbazia Defense, Main Line: 1
 King's Gambit Accepted: Becker Defense: 4
 King's Gambit Accepted: Bishop's Gambit: 2
 King's Gambit Accepted: Bishop's Gambit, Bledow Countergambit: 1
 King's Gambit Accepted: Bishop's Gambit, Bledow Variation: 1
 King's Gambit Accepted: Bishop's Gambit, Bogoljubow Defense: 10
 King's Gambit Accepted: Bishop's Gambit, Bogoljubow Variation: 2
 King's Gambit Accepted: Bishop's Gambit, Cozio Defense: 1
 King's Gambit Accepted: Bishop's Gambit, Cozio Variation: 1
 King's Gambit Accepted: Bishop's Gambit, First Jaenisch Variation: 2
 King's Gambit Accepted: Bishop's Gambit, Paulsen Attack: 1
 King's Gambit Accepted: Bishop's Gambit, Steinitz Defense: 1
 King's Gambit Accepted: Bonsch-Osmolovsky Variation: 10
 King's Gambit Accepted: Breyer Gambit: 1
 King's Gambit Accepted: Cunningham Defense: 1
 King's Gambit Accepted: Cunningham Defense, McCormick Defense: 2
 King's Gambit Accepted: Double Muzio Gambit, Paulsen Defense: 1
 King's Gambit Accepted: Fischer Defense: 8
 King's Gambit Accepted: Greco Gambit: 2
 King's Gambit Accepted: Kieseritzky Gambit, Anderssen Defense: 1
 King's Gambit Accepted: Kieseritzky Gambit, Berlin Defense, Rubinstein Variation: 3
 King's Gambit Accepted: Kieseritzky Gambit, Kolisch Defense: 5
 King's Gambit Accepted: Kieseritzky Gambit, Paulsen Defense Deferred: 2
 King's Gambit Accepted: Kieseritzky Gambit, Rosenthal Defense: 1
 King's Gambit Accepted: Mason-Keres Gambit: 3
 King's Gambit Accepted: Modern Defense: 2
 King's Gambit Accepted: Quaade Gambit: 2
 King's Gambit Accepted: Schallopp Defense: 1
 King's Gambit Accepted: Traditional Variation: 1
 King's Gambit Accepted: Villemson Gambit: 1
 King's Gambit Declined: Classical Variation: 4
 King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Morphy Defense: 2
 King's Gambit Declined: Falkbeer Countergambit, Modern Transfer: 1
 King's Gambit Declined: Falkbeer Countergambit, Nimzowitsch-Marshall Countergambit: 1
 King's Gambit Declined: Petrov's Defense: 2
 King's Indian Attack: 1610
 King's Indian Attack: Double Fianchetto: 426
 King's Indian Attack: French Variation: 30
 King's Indian Attack: Keres Variation: 407
 King's Indian Attack: Pachman System: 87
 King's Indian Attack: Sicilian Variation: 125
 King's Indian Attack: Smyslov Variation: 8
 King's Indian Attack: Spassky Variation: 125
 King's Indian Attack: Symmetrical Defense: 546
 King's Indian Attack: Wahls Defense: 51
 King's Indian Attack: Yugoslav Variation: 399
 King's Indian Defense: 124
 King's Indian Defense: Accelerated Averbakh Variation: 32
 King's Indian Defense: Averbakh Variation: 15
 King's Indian Defense: Averbakh Variation, Benoni Defense: 1
 King's Indian Defense: Averbakh Variation, Benoni Defense, Advance Variation: 49
 King's Indian Defense: Averbakh Variation, Benoni Defense, Exchange Variation: 7
 King's Indian Defense: Averbakh Variation, Flexible Defense: 31
 King's Indian Defense: Averbakh Variation, Geller Defense: 20
 King's Indian Defense: Averbakh Variation, Main Line: 12
 King's Indian Defense: Averbakh Variation, Modern Defense: 76
 King's Indian Defense: Averbakh Variation, Modern Defense, Burgess Line: 5
 King's Indian Defense: Averbakh Variation, Nc6 Defense: 5
 King's Indian Defense: Averbakh Variation, Spanish Defense: 11
 King's Indian Defense: Exchange Variation: 186
 King's Indian Defense: Fianchetto Variation, Benjamin Defense: 48
 King's Indian Defense: Fianchetto Variation, Carlsbad Variation: 57
 King's Indian Defense: Fianchetto Variation, Classical Fianchetto: 108
 King's Indian Defense: Fianchetto Variation, Classical Main Line: 113
 King's Indian Defense: Fianchetto Variation, Classical Variation: 256
 King's Indian Defense: Fianchetto Variation, Debrecen Defense: 6
 King's Indian Defense: Fianchetto Variation, Delayed Fianchetto: 4
 King's Indian Defense: Fianchetto Variation, Double Fianchetto Attack: 18
 King's Indian Defense: Fianchetto Variation, Hungarian Variation: 6
 King's Indian Defense: Fianchetto Variation, Immediate Fianchetto: 369
 King's Indian Defense: Fianchetto Variation, Kavalek Defense: 128
 King's Indian Defense: Fianchetto Variation, Larsen Defense: 116
 King's Indian Defense: Fianchetto Variation, Lesser Simagin (Spassky): 94
 King's Indian Defense: Fianchetto Variation, Long Variation: 14
 King's Indian Defense: Fianchetto Variation, Panno Variation: 338
 King's Indian Defense: Fianchetto Variation, Panno Variation, Blockade Line: 4
 King's Indian Defense: Fianchetto Variation, Panno Variation, Donner Line: 2
 King's Indian Defense: Fianchetto Variation, Panno Variation, Korchnoi Line: 7
 King's Indian Defense: Fianchetto Variation, Pterodactyl Variation: 44
 King's Indian Defense: Fianchetto Variation, Simagin Variation: 29
 King's Indian Defense: Fianchetto Variation, Uhlmann-Szabo System: 127
 King's Indian Defense: Fianchetto Variation, Yugoslav System: 14
 King's Indian Defense: Fianchetto Variation, Yugoslav Variation: 8
 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line: 23
 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line: 73
 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Rare Line: 16
 King's Indian Defense: Four Pawns Attack: 45
 King's Indian Defense: Four Pawns Attack, Dynamic Attack: 18
 King's Indian Defense: Four Pawns Attack, Exchange Variation: 1
 King's Indian Defense: Four Pawns Attack, Normal Attack: 30
 King's Indian Defense: Kazakh Variation: 26
 King's Indian Defense: Kramer Variation: 59
 King's Indian Defense: Larsen Variation: 26
 King's Indian Defense: Makogonov Variation: 234
 King's Indian Defense: Normal Variation: 255
 King's Indian Defense: Normal Variation, Deferred Fianchetto: 1
 King's Indian Defense: Normal Variation, King's Knight Variation: 873
 King's Indian Defense: Normal Variation, Rare Defenses: 237
 King's Indian Defense: Normal Variation, Standard Development: 16
 King's Indian Defense: Orthodox Variation: 503
 King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense: 157
 King's Indian Defense: Orthodox Variation, Bayonet Attack: 153
 King's Indian Defense: Orthodox Variation, Bayonet Attack, Sokolov's Line: 175
 King's Indian Defense: Orthodox Variation, Bayonet Attack, Yepishin's Line: 7
 King's Indian Defense: Orthodox Variation, Classical System: 103
 King's Indian Defense: Orthodox Variation, Classical System, Benko Attack: 19
 King's Indian Defense: Orthodox Variation, Classical System, Kozul Gambit: 9
 King's Indian Defense: Orthodox Variation, Classical System, Neo-Classical Line: 38
 King's Indian Defense: Orthodox Variation, Classical System, Traditional Line: 5
 King's Indian Defense: Orthodox Variation, Donner Defense: 98
 King's Indian Defense: Orthodox Variation, Glek Defense: 342
 King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System: 399
 King's Indian Defense: Orthodox Variation, Korchnoi Attack: 9
 King's Indian Defense: Orthodox Variation, Modern System: 175
 King's Indian Defense: Orthodox Variation, Positional Defense: 159
 King's Indian Defense: Orthodox Variation, Positional Defense, Closed Line: 8
 King's Indian Defense: Orthodox Variation, Positional Defense, Main Line: 20
 King's Indian Defense: Orthodox Variation, Ukrainian Defense: 2
 King's Indian Defense: Petrosian Variation: 26
 King's Indian Defense: Petrosian Variation, Normal Defense: 14
 King's Indian Defense: Petrosian Variation, Stein Defense: 121
 King's Indian Defense: Pomar System: 1
 King's Indian Defense: Santasiere Variation: 2
 King's Indian Defense: Semi-Averbakh System: 98
 King's Indian Defense: Semi-Classical Variation: 14
 King's Indian Defense: Semi-Classical Variation, Hollywood Variation: 3
 King's Indian Defense: Semi-Classical Variation, Queenside Storm Line: 5
 King's Indian Defense: Smyslov Variation: 22
 King's Indian Defense: Steiner Attack: 85
 King's Indian Defense: Sämisch Variation: 89
 King's Indian Defense: Sämisch Variation, Bobotsov-Korchnoi-Petrosian Variation: 110
 King's Indian Defense: Sämisch Variation, Byrne Defense: 14
 King's Indian Defense: Sämisch Variation, Closed Variation: 39
 King's Indian Defense: Sämisch Variation, Closed Variation, Main Line: 2
 King's Indian Defense: Sämisch Variation, Double Fianchetto: 10
 King's Indian Defense: Sämisch Variation, Normal Defense: 63
 King's Indian Defense: Sämisch Variation, Orthodox Variation: 1
 King's Indian Defense: Sämisch Variation, Orthodox Variation, Bronstein Variation: 4
 King's Indian Defense: Sämisch Variation, Panno Formation: 29
 King's Indian Defense: Sämisch Variation, Panno Main Line: 71
 King's Indian Defense: Sämisch Variation, Ruban Variation: 1
 King's Indian Defense: Sämisch Variation, Sämisch Gambit: 133
 King's Indian Defense: Sämisch Variation, Yates Defense: 10
 King's Indian Defense: Zinnowitz Variation: 1
 King's Knight Opening: 2
 King's Knight Opening: Konstantinopolsky: 35
 King's Knight Opening: Normal Variation: 13
 King's Pawn Game: 55
 King's Pawn Game: Alapin Opening: 3
 King's Pawn Game: King's Head Opening: 2
 King's Pawn Game: Leonardis Variation: 2
 King's Pawn Game: Maróczy Defense: 10
 King's Pawn Game: Tayler Opening: 3
 King's Pawn Game: Tayler Opening, Inverted Hanham: 10
 King's Pawn Game: Wayward Queen Attack: 3
 Kádas Opening: 3
 Lasker Simul Special: 1
 Latvian Gambit: Clam Gambit: 1
 Lemming Defense: 1
 Lion Defense: Anti-Philidor: 1
 Lion Defense: Anti-Philidor, Lion's Cave: 11
 Lion Defense: Bayonet Attack: 3
 Lion Defense: Lion's Jaw: 113
 London System: 258
 London System: Poisoned Pawn Variation: 5
 Marienbad System: 9
 Marienbad System: Berg Variation: 2
 Mexican Defense: 53
 Mieses Opening: 12
 Mieses Opening: Reversed Rat: 2
 Mikenas Defense: 15
 Mikenas Defense: Lithuanian Variation: 3
 Modern Defense: 240
 Modern Defense: Averbakh System: 94
 Modern Defense: Averbakh Variation, Pseudo-Sämisch: 4
 Modern Defense: Beefeater Variation: 10
 Modern Defense: Bishop Attack: 1
 Modern Defense: Geller's System: 137
 Modern Defense: Gurgenidze Defense: 9
 Modern Defense: Kotov Variation: 32
 Modern Defense: Lizard Defense, Mittenberger Gambit: 14
 Modern Defense: Mongredien Defense, with Nf3: 3
 Modern Defense: Neo-Modern Defense: 1
 Modern Defense: Norwegian Defense: 5
 Modern Defense: Norwegian Defense, Norwegian Gambit: 1
 Modern Defense: Pseudo-Austrian Attack: 56
 Modern Defense: Semi-Averbakh Variation, Polish Variation: 29
 Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation: 27
 Modern Defense: Standard Defense: 270
 Modern Defense: Standard Line: 152
 Modern Defense: Three Pawns Attack: 4
 Modern Defense: Two Knights Variation: 57
 Modern Defense: Two Knights Variation, Suttles Variation: 77
 Neo-Grünfeld Defense: Classical Variation: 16
 Neo-Grünfeld Defense: Classical Variation, Modern Defense: 182
 Neo-Grünfeld Defense: Classical Variation, Original Defense: 418
 Neo-Grünfeld Defense: Classical Variation, Polgar Variation: 30
 Neo-Grünfeld Defense: Delayed Exchange Variation: 185
 Neo-Grünfeld Defense: Exchange Variation: 177
 Neo-Grünfeld Defense: Goglidze Attack: 86
 Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation: 323
 Neo-Grünfeld Defense: with g3: 4
 Nimzo-Indian Defense: 56
 Nimzo-Indian Defense: Classical Variation: 1032
 Nimzo-Indian Defense: Classical Variation, Belyavsky Gambit: 2
 Nimzo-Indian Defense: Classical Variation, Berlin Variation: 140
 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System: 73
 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation: 152
 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Steiner Variation: 1
 Nimzo-Indian Defense: Classical Variation, Keres Defense: 597
 Nimzo-Indian Defense: Classical Variation, Milner-Barry Variation: 58
 Nimzo-Indian Defense: Classical Variation, Noa Variation: 812
 Nimzo-Indian Defense: Classical Variation, Noa Variation, Botvinnik Variation: 2
 Nimzo-Indian Defense: Classical Variation, Noa Variation, San Remo Variation: 7
 Nimzo-Indian Defense: Classical Variation, Vitolins-Adorjan Gambit: 49
 Nimzo-Indian Defense: Classical Variation, Zurich Variation: 18
 Nimzo-Indian Defense: Fischer Variation: 82
 Nimzo-Indian Defense: Hübner Variation: 136
 Nimzo-Indian Defense: Hübner Variation, Main Line: 65
 Nimzo-Indian Defense: Hübner Variation, Rubinstein Variation: 135
 Nimzo-Indian Defense: Hübner Variation, Rubinstein Variation, Main Line: 78
 Nimzo-Indian Defense: Hübner Variation, Rubinstein Variation, Sherbakov Attack: 1
 Nimzo-Indian Defense: Kmoch Variation: 227
 Nimzo-Indian Defense: Leningrad Variation: 74
 Nimzo-Indian Defense: Leningrad Variation, Averbakh Gambit: 9
 Nimzo-Indian Defense: Leningrad Variation, Benoni Defense: 22
 Nimzo-Indian Defense: Mikenas Attack: 1
 Nimzo-Indian Defense: Normal Line: 63
 Nimzo-Indian Defense: Normal Variation: 144
 Nimzo-Indian Defense: Normal Variation, Bernstein Defense: 79
 Nimzo-Indian Defense: Normal Variation, Bernstein Defense, Exchange Line: 104
 Nimzo-Indian Defense: Normal Variation, Bishop Attack: 146
 Nimzo-Indian Defense: Normal Variation, Bishop Attack, Classical Defense: 241
 Nimzo-Indian Defense: Normal Variation, Botvinnik System: 126
 Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation: 52
 Nimzo-Indian Defense: Normal Variation, Gligoric System: 242
 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense: 63
 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bronstein Variation: 150
 Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation: 165
 Nimzo-Indian Defense: Normal Variation, Gligoric System, Keres Variation: 15
 Nimzo-Indian Defense: Normal Variation, Gligoric System, Smyslov Variation: 6
 Nimzo-Indian Defense: Normal Variation, Hübner Deferred: 13
 Nimzo-Indian Defense: Normal Variation, Ragozin Variation: 96
 Nimzo-Indian Defense: Normal Variation, Schlechter Defense: 202
 Nimzo-Indian Defense: Normal Variation, Sämisch Deferred: 15
 Nimzo-Indian Defense: Normal Variation, Taimanov Variation: 11
 Nimzo-Indian Defense: Ragozin Defense: 6
 Nimzo-Indian Defense: Ragozin Variation: 3
 Nimzo-Indian Defense: Reshevsky Variation: 287
 Nimzo-Indian Defense: Romanishin Variation: 144
 Nimzo-Indian Defense: Romanishin Variation, English Hybrid: 121
 Nimzo-Indian Defense: Simagin Variation: 83
 Nimzo-Indian Defense: Spielmann Variation: 11
 Nimzo-Indian Defense: Spielmann Variation, Carlsbad Variation: 5
 Nimzo-Indian Defense: Spielmann Variation, Romanovsky Gambit: 13
 Nimzo-Indian Defense: St. Petersburg Variation: 182
 Nimzo-Indian Defense: St. Petersburg Variation, with Ne4: 29
 Nimzo-Indian Defense: Sämisch Variation: 99
 Nimzo-Indian Defense: Sämisch Variation, Accelerated: 30
 Nimzo-Indian Defense: Sämisch Variation, Capablanca Variation: 18
 Nimzo-Indian Defense: Sämisch Variation, Keres Variation: 106
 Nimzo-Indian Defense: Sämisch Variation, O'Kelly Variation: 2
 Nimzo-Indian Defense: Sämisch Variation, Romanovsky Variation: 22
 Nimzo-Indian Defense: Three Knights Variation: 355
 Nimzo-Indian Defense: Three Knights Variation, Duchamp Variation: 343
 Nimzo-Indian Defense: Three Knights Variation, Duchamp Variation, Modern Line: 87
 Nimzo-Indian Defense: Three Knights Variation, Euwe Variation: 1
 Nimzo-Larsen Attack: 32
 Nimzo-Larsen Attack: Classical Variation: 347
 Nimzo-Larsen Attack: English Variation: 26
 Nimzo-Larsen Attack: Indian Variation: 84
 Nimzo-Larsen Attack: Modern Variation: 165
 Nimzo-Larsen Attack: Spike Variation: 2
 Nimzo-Larsen Attack: Symmetrical Variation: 24
 Nimzowitsch Defense: 2
 Nimzowitsch Defense: Declined Variation: 5
 Nimzowitsch Defense: French Connection: 1
 Nimzowitsch Defense: Kennedy Variation, Keres Attack: 2
 Nimzowitsch Defense: Kennedy Variation, Linksspringer Variation: 5
 Nimzowitsch Defense: Kennedy Variation, Paulsen Attack: 3
 Nimzowitsch Defense: Kennedy Variation, Riemann Defense: 3
 Nimzowitsch Defense: Mikenas Variation: 2
 Nimzowitsch Defense: Pseudo-Spanish Variation: 1
 Nimzowitsch Defense: Scandinavian Variation, Advance Variation: 6
 Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Nimzowitsch Gambit: 1
 Nimzowitsch Defense: Williams Variation: 53
 Old Indian Defense: 116
 Old Indian Defense: Czech Variation, with Nc3: 5
 Old Indian Defense: Czech Variation, with Nf3: 27
 Old Indian Defense: Duz-Khotimirsky Variation: 2
 Old Indian Defense: Janowski Variation: 9
 Old Indian Defense: Janowski Variation, Fianchetto Variation: 5
 Old Indian Defense: Janowski Variation, Main Line: 13
 Old Indian Defense: Normal Variation: 60
 Old Indian Defense: Tartakower-Indian: 18
 Old Indian Defense: Two Knights Variation: 40
 Old Indian Defense: Ukrainian Variation: 17
 Owen Defense: 42
 Paleface Attack: 1
 Petrov's Defense: 30
 Petrov's Defense: Classical Attack: 240
 Petrov's Defense: Classical Attack, Berger Variation: 16
 Petrov's Defense: Classical Attack, Chigorin Variation: 118
 Petrov's Defense: Classical Attack, Chigorin Variation, Browne Attack: 32
 Petrov's Defense: Classical Attack, Chigorin Variation, Main Line: 319
 Petrov's Defense: Classical Attack, Closed Variation: 2
 Petrov's Defense: Classical Attack, Jaenisch Variation: 79
 Petrov's Defense: Classical Attack, Krause Variation: 2
 Petrov's Defense: Classical Attack, Marshall Variation: 39
 Petrov's Defense: Classical Attack, Marshall Variation, Chinese Gambit: 3
 Petrov's Defense: Classical Attack, Mason Variation: 19
 Petrov's Defense: Classical Attack, Mason-Showalter Variation: 144
 Petrov's Defense: Classical Attack, Staunton Variation: 283
 Petrov's Defense: Cochrane Gambit: 1
 Petrov's Defense: Cochrane Gambit, Center Variation: 1
 Petrov's Defense: Cozio Attack: 300
 Petrov's Defense: Damiano Variation: 1
 Petrov's Defense: Damiano Variation, Kholmov Gambit: 8
 Petrov's Defense: French Attack: 106
 Petrov's Defense: Karklins-Martinovsky Variation: 45
 Petrov's Defense: Kaufmann Attack: 72
 Petrov's Defense: Millennium Attack: 94
 Petrov's Defense: Modern Attack: 91
 Petrov's Defense: Modern Attack, Center Attack: 39
 Petrov's Defense: Modern Attack, Center Variation: 430
 Petrov's Defense: Modern Attack, Murrey Variation: 63
 Petrov's Defense: Modern Attack, Symmetrical Variation: 1
 Petrov's Defense: Modern Attack, Trifunovic Variation: 12
 Petrov's Defense: Nimzowitsch Attack: 625
 Petrov's Defense: Paulsen Attack: 38
 Petrov's Defense: Stafford Gambit: 1
 Petrov's Defense: Three Knights Game: 51
 Philidor Defense: 24
 Philidor Defense: Exchange Variation: 166
 Philidor Defense: Hanham Variation, Delmar Variation: 1
 Philidor Defense: Hanham Variation, Krause Variation: 1
 Philidor Defense: Hanham Variation, Schlechter Variation: 1
 Philidor Defense: Hanham Variation, Steiner Variation: 2
 Philidor Defense: Larsen Variation: 3
 Philidor Defense: Lion Variation: 472
 Philidor Defense: Lion Variation, Forcing Line: 1
 Philidor Defense: Lion Variation, Lion's Claw, with Bc4 and h6: 1
 Philidor Defense: Lion Variation, Lion's Claw, with Be2 and c6: 1
 Philidor Defense: Lion Variation, Shirov Gambit: 18
 Philidor Defense: Lion Variation, Sozin Variation: 4
 Philidor Defense: Nimzowitsch Variation: 1
 Philidor Defense: Nimzowitsch Variation, Klein Variation: 1
 Philidor Defense: Nimzowitsch Variation, Rellstab Variation: 7
 Philidor Defense: Nimzowitsch Variation, Sokolsky Variation: 1
 Philidor Defense: Steinitz Variation: 2
 Pirc Defense: 579
 Pirc Defense: 150 Attack: 36
 Pirc Defense: 150 Attack, Sveshnikov-Jansa Attack: 37
 Pirc Defense: Austrian Attack: 16
 Pirc Defense: Austrian Attack, Dragon Formation: 126
 Pirc Defense: Austrian Attack, Kurajica Variation: 30
 Pirc Defense: Austrian Attack, Unzicker Attack: 23
 Pirc Defense: Austrian Attack, Unzicker Attack, Bronstein Variation: 3
 Pirc Defense: Austrian Attack, Weiss Variation: 120
 Pirc Defense: Bayonet Attack: 6
 Pirc Defense: Byrne Variation: 72
 Pirc Defense: Chinese Variation: 1
 Pirc Defense: Classical Variation: 69
 Pirc Defense: Classical Variation, Quiet System: 128
 Pirc Defense: Classical Variation, Quiet System, Chigorin Line: 73
 Pirc Defense: Classical Variation, Quiet System, Czech Defense: 144
 Pirc Defense: Classical Variation, Quiet System, Parma Defense: 130
 Pirc Defense: Classical Variation, Schlechter Variation: 57
 Pirc Defense: Kholmov System: 2
 Pirc Defense: Sveshnikov System: 66
 Polish Defense: 11
 Polish Defense: Spassky Gambit Accepted: 2
 Polish Opening: 18
 Polish Opening: King's Indian Variation: 2
 Polish Opening: King's Indian Variation, Sokolsky Attack: 8
 Polish Opening: Outflank Variation: 4
 Polish Opening: Schiffler-Sokolsky Variation: 1
 Polish Opening: Zukertort System: 3
 Ponziani Opening: 5
 Ponziani Opening: Caro Gambit: 4
 Ponziani Opening: Jaenisch Counterattack: 48
 Ponziani Opening: Leonhardt Variation: 2
 Ponziani Opening: Romanishin Variation: 1
 Ponziani Opening: Spanish Variation: 1
 Ponziani Opening: Spanish Variation, Harrwitz Attack, Nikitin Gambit: 2
 Ponziani Opening: Steinitz Variation: 2
 Portuguese Opening: 1
 Pseudo Queen's Indian Defense: 78
 Pterodactyl Defense: 12
 Pterodactyl Defense: Central, Benoni Beefeater Pterodactyl: 1
 Pterodactyl Defense: Central, Bogolubovia: 1
 Pterodactyl Defense: Eastern, Benoni: 9
 Pterodactyl Defense: Queen Pterodactyl, Quiet Line: 5
 Pterodactyl Defense: Sicilian, Rhamphorhynchus: 1
 Pterodactyl Defense: Western, Pterodactyl: 3
 Pterodactyl Defense: Western, Rhamphorhynchus: 10
 Queen's Gambit: 3
 Queen's Gambit Accepted: 19
 Queen's Gambit Accepted: Accelerated Mannheim Variation: 1
 Queen's Gambit Accepted: Alekhine Defense: 44
 Queen's Gambit Accepted: Alekhine Defense, Alatortsev Variation: 1
 Queen's Gambit Accepted: Alekhine Defense, Borisenko-Furman Variation: 7
 Queen's Gambit Accepted: Alekhine Defense, Haberditz Variation: 89
 Queen's Gambit Accepted: Bogoljubow Defense: 41
 Queen's Gambit Accepted: Central Variation, Alekhine System: 306
 Queen's Gambit Accepted: Central Variation, Greco Variation: 34
 Queen's Gambit Accepted: Central Variation, McDonnell Defense: 242
 Queen's Gambit Accepted: Central Variation, Modern Defense: 63
 Queen's Gambit Accepted: Central Variation, Rubinstein Defense: 30
 Queen's Gambit Accepted: Classical Defense: 96
 Queen's Gambit Accepted: Classical Defense, Alekhine System: 43
 Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line: 45
 Queen's Gambit Accepted: Classical Defense, Alekhine System, Smyslov Variation: 4
 Queen's Gambit Accepted: Classical Defense, Main Line: 798
 Queen's Gambit Accepted: Classical Defense, Normal Line: 4
 Queen's Gambit Accepted: Classical Defense, Rubinstein Variation: 166
 Queen's Gambit Accepted: Classical Defense, Russian Gambit: 24
 Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Development Variation: 114
 Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Exchange Variation: 24
 Queen's Gambit Accepted: Classical, Furman Variation: 1
 Queen's Gambit Accepted: Furman Variation: 221
 Queen's Gambit Accepted: Godes Variation: 1
 Queen's Gambit Accepted: Gunsberg Defense: 73
 Queen's Gambit Accepted: Gunsberg Defense, Prianishenmo Gambit: 21
 Queen's Gambit Accepted: Janowski-Larsen Variation: 124
 Queen's Gambit Accepted: Linares Variation: 11
 Queen's Gambit Accepted: Mannheim Variation: 56
 Queen's Gambit Accepted: Normal Variation: 60
 Queen's Gambit Accepted: Normal Variation, Traditional System: 68
 Queen's Gambit Accepted: Old Variation: 212
 Queen's Gambit Accepted: Rosenthal Variation: 56
 Queen's Gambit Accepted: Showalter Variation: 10
 Queen's Gambit Accepted: Smyslov Variation: 13
 Queen's Gambit Accepted: Winawer Defense: 10
 Queen's Gambit Declined: 739
 Queen's Gambit Declined: Albin Countergambit: 5
 Queen's Gambit Declined: Albin Countergambit, Balogh Variation: 1
 Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation: 8
 Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Be6 Line: 1
 Queen's Gambit Declined: Albin Countergambit, Modern Line: 1
 Queen's Gambit Declined: Albin Countergambit, Normal Line: 14
 Queen's Gambit Declined: Anti-Tartakower Variation: 59
 Queen's Gambit Declined: Anti-Tartakower Variation, Petrosian Variation: 168
 Queen's Gambit Declined: Austrian Attack, Salvio Countergambit: 1
 Queen's Gambit Declined: Austrian Defense: 22
 Queen's Gambit Declined: Austrian Defense, Gusev Countergambit: 1
 Queen's Gambit Declined: Baltic Defense: 13
 Queen's Gambit Declined: Baltic Defense, Argentinian Gambit: 6
 Queen's Gambit Declined: Baltic Defense, Pseudo-Chigorin: 20
 Queen's Gambit Declined: Baltic Defense, Pseudo-Slav: 22
 Queen's Gambit Declined: Baltic Defense, Queen Attack: 1
 Queen's Gambit Declined: Barmen Variation: 524
 Queen's Gambit Declined: Been-Koomen Variation: 3
 Queen's Gambit Declined: Cambridge Springs Defense: 29
 Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation: 77
 Queen's Gambit Declined: Cambridge Springs Defense, Capablanca Variation: 5
 Queen's Gambit Declined: Cambridge Springs Defense, Rubinstein Variation: 42
 Queen's Gambit Declined: Cambridge Springs Defense, Yugoslav Variation: 104
 Queen's Gambit Declined: Capablanca Variation: 106
 Queen's Gambit Declined: Capablanca Variation, Anti-Cambridge Springs Variation: 6
 Queen's Gambit Declined: Charousek Variation: 486
 Queen's Gambit Declined: Chigorin Defense: 23
 Queen's Gambit Declined: Chigorin Defense, Exchange Variation: 14
 Queen's Gambit Declined: Chigorin Defense, Exchange Variation, Costa's Line: 16
 Queen's Gambit Declined: Chigorin Defense, Main Line: 49
 Queen's Gambit Declined: Chigorin Defense, Modern Gambit: 24
 Queen's Gambit Declined: Exchange Variation: 164
 Queen's Gambit Declined: Exchange Variation, Chameleon Variation: 1
 Queen's Gambit Declined: Exchange Variation, Positional Variation: 782
 Queen's Gambit Declined: Exchange Variation, Reshevsky Variation: 119
 Queen's Gambit Declined: Exchange Variation, Sämisch Variation: 92
 Queen's Gambit Declined: Harrwitz Attack: 294
 Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense: 135
 Queen's Gambit Declined: Harrwitz Attack, Main Line: 334
 Queen's Gambit Declined: Harrwitz Attack, Orthodox Defense: 11
 Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense: 403
 Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line: 241
 Queen's Gambit Declined: Hastings Variation: 62
 Queen's Gambit Declined: Janowski Variation: 147
 Queen's Gambit Declined: Knight Defense, Alekhine Gambit: 8
 Queen's Gambit Declined: Lasker Defense: 251
 Queen's Gambit Declined: Lasker Defense, Bernstein Variation, Mar del Plata Gambit: 1
 Queen's Gambit Declined: Lasker Defense, Main Line: 24
 Queen's Gambit Declined: Lasker Defense, Teichmann Variation: 66
 Queen's Gambit Declined: Manhattan Variation: 2
 Queen's Gambit Declined: Marshall Defense: 2
 Queen's Gambit Declined: Marshall Defense, Tan Gambit: 1
 Queen's Gambit Declined: Miles Variation: 34
 Queen's Gambit Declined: Modern Variation: 21
 Queen's Gambit Declined: Modern Variation, Knight Defense: 47
 Queen's Gambit Declined: Modern Variation, Normal Line: 31
 Queen's Gambit Declined: Neo-Orthodox Variation: 17
 Queen's Gambit Declined: Neo-Orthodox Variation, Main Line: 92
 Queen's Gambit Declined: Normal Defense: 5
 Queen's Gambit Declined: Orthodox Defense: 28
 Queen's Gambit Declined: Orthodox Defense, Alekhine Variation: 15
 Queen's Gambit Declined: Orthodox Defense, Bd3 Line: 17
 Queen's Gambit Declined: Orthodox Defense, Botvinnik Variation: 17
 Queen's Gambit Declined: Orthodox Defense, Capablanca System: 1
 Queen's Gambit Declined: Orthodox Defense, Classical Variation: 17
 Queen's Gambit Declined: Orthodox Defense, Fianchetto Variation: 1
 Queen's Gambit Declined: Orthodox Defense, Henneberger Variation: 14
 Queen's Gambit Declined: Orthodox Defense, Main Line: 79
 Queen's Gambit Declined: Orthodox Defense, Rauzer Variation: 2
 Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack: 9
 Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation: 62
 Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation, Flohr Line: 38
 Queen's Gambit Declined: Orthodox Defense, Swiss, Carlsbad Variation: 31
 Queen's Gambit Declined: Pseudo-Tarrasch Variation: 6
 Queen's Gambit Declined: Pseudo-Tarrasch Variation, Primitive Pillsbury Variation: 3
 Queen's Gambit Declined: Queen's Knight Variation: 183
 Queen's Gambit Declined: Ragozin Defense: 1431
 Queen's Gambit Declined: Ragozin Defense, Alekhine Variation: 316
 Queen's Gambit Declined: Ragozin Defense, Vienna Variation: 140
 Queen's Gambit Declined: Semi-Slav, Abrahams Variation: 29
 Queen's Gambit Declined: Semi-Slav, Junge Variation: 1
 Queen's Gambit Declined: Semi-Slav, Koomen Variation: 2
 Queen's Gambit Declined: Semi-Tarrasch Defense: 434
 Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation: 349
 Queen's Gambit Declined: Semi-Tarrasch Defense, Kmoch Variation: 7
 Queen's Gambit Declined: Semi-Tarrasch Defense, Main Line: 85
 Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation: 60
 Queen's Gambit Declined: Semmering Variation: 7
 Queen's Gambit Declined: Tarrasch Defense: 2
 Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch: 38
 Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch Bishop Attack: 22
 Queen's Gambit Declined: Tartakower Defense: 681
 Queen's Gambit Declined: Tartakower Defense, Exchange Variation: 2
 Queen's Gambit Declined: Tartakower Defense, Makogonov Exchange Variation: 57
 Queen's Gambit Declined: Three Knights Variation: 678
 Queen's Gambit Declined: Three Knights, Vienna Variation: 627
 Queen's Gambit Declined: Traditional Variation: 141
 Queen's Gambit Declined: Uhlmann Variation: 27
 Queen's Gambit Declined: Vienna Variation: 37
 Queen's Gambit Declined: Vienna Variation, Quiet Variation: 280
 Queen's Gambit Declined: Westphalian Variation: 27
 Queen's Indian Accelerated: 82
 Queen's Indian Defense: 17
 Queen's Indian Defense: Anti-Queen's Indian System: 67
 Queen's Indian Defense: Buerger Variation: 6
 Queen's Indian Defense: Capablanca Variation: 153
 Queen's Indian Defense: Classical Variation: 48
 Queen's Indian Defense: Classical Variation, Polugaevsky Gambit: 63
 Queen's Indian Defense: Classical Variation, Taimanov Gambit: 6
 Queen's Indian Defense: Classical Variation, Tiviakov Defense: 29
 Queen's Indian Defense: Classical Variation, Traditional Variation: 589
 Queen's Indian Defense: Classical Variation, Traditional Variation, Main Line: 215
 Queen's Indian Defense: Classical Variation, Traditional Variation, Nimzowitsch Line: 25
 Queen's Indian Defense: Euwe Variation: 32
 Queen's Indian Defense: Fianchetto Variation: 279
 Queen's Indian Defense: Fianchetto Variation, Check Variation: 32
 Queen's Indian Defense: Fianchetto Variation, Check Variation, Intermezzo Line: 889
 Queen's Indian Defense: Fianchetto Variation, Check Variation, Modern Line: 1
 Queen's Indian Defense: Fianchetto Variation, Kramnik Variation: 208
 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation: 440
 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Nimzowitsch Attack: 255
 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Quiet Line: 394
 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Timman's Line: 141
 Queen's Indian Defense: Fianchetto Variation, Rubinstein Variation: 20
 Queen's Indian Defense: Fianchetto Variation, Sämisch Variation: 16
 Queen's Indian Defense: Fianchetto Variation, Traditional Line: 43
 Queen's Indian Defense: Kasparov Variation: 168
 Queen's Indian Defense: Kasparov Variation, Botvinnik Attack: 9
 Queen's Indian Defense: Kasparov-Petrosian Variation: 3
 Queen's Indian Defense: Kasparov-Petrosian Variation, Andersson Variation: 68
 Queen's Indian Defense: Kasparov-Petrosian Variation, Classical Variation: 100
 Queen's Indian Defense: Kasparov-Petrosian Variation, Hedgehog Variation: 72
 Queen's Indian Defense: Kasparov-Petrosian Variation, Kasparov Attack: 207
 Queen's Indian Defense: Kasparov-Petrosian Variation, Main Line: 341
 Queen's Indian Defense: Kasparov-Petrosian Variation, Marco Defense: 10
 Queen's Indian Defense: Kasparov-Petrosian Variation, Modern Variation: 1
 Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack: 139
 Queen's Indian Defense: Kasparov-Petrosian Variation, Rashkovsky Attack: 19
 Queen's Indian Defense: Kasparov-Petrosian Variation, Romanishin Attack: 71
 Queen's Indian Defense: Miles Variation: 62
 Queen's Indian Defense: Opocensky Variation: 156
 Queen's Indian Defense: Petrosian Variation: 179
 Queen's Indian Defense: Petrosian Variation, Farago Defense: 208
 Queen's Indian Defense: Riumin Variation: 74
 Queen's Indian Defense: Spassky System: 240
 Queen's Indian Defense: Traditional Variation: 4
 Queen's Indian Defense: Yates Variation: 143
 Queen's Pawn Game: 337
 Queen's Pawn Game: Accelerated London System: 222
 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit: 92
 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit Accepted: 2
 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit: 4
 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit Accepted: 3
 Queen's Pawn Game: Anglo-Slav Opening: 1
 Queen's Pawn Game: Anti-Torre: 5
 Queen's Pawn Game: Barry Attack: 57
 Queen's Pawn Game: Barry Attack, Grünfeld Variation: 32
 Queen's Pawn Game: Barry Attack, Tarzan Attack: 14
 Queen's Pawn Game: Chigorin Variation: 49
 Queen's Pawn Game: Chigorin Variation, Alburt Defense: 8
 Queen's Pawn Game: Chigorin Variation, Irish Gambit: 3
 Queen's Pawn Game: Colle System: 143
 Queen's Pawn Game: Colle System, Anti-Colle: 11
 Queen's Pawn Game: Colle System, Grünfeld Formation: 2
 Queen's Pawn Game: Colle System, Traditional Colle: 9
 Queen's Pawn Game: Krause Variation: 51
 Queen's Pawn Game: Levitsky Attack: 93
 Queen's Pawn Game: Levitsky Attack, Euwe Variation, Modern Line: 27
 Queen's Pawn Game: London System: 653
 Queen's Pawn Game: London System, with e6: 40
 Queen's Pawn Game: Modern Defense: 255
 Queen's Pawn Game: Symmetrical Variation: 585
 Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan: 109
 Queen's Pawn Game: Torre Attack: 36
 Queen's Pawn Game: Torre Attack, Breyer Variation: 2
 Queen's Pawn Game: Torre Attack, Gossip Variation: 50
 Queen's Pawn Game: Torre Attack, Grünfeld Variation: 5
 Queen's Pawn Game: Torre Attack, Grünfeld Variation, Main Line: 88
 Queen's Pawn Game: Veresov Attack, Classical Defense: 2
 Queen's Pawn Game: Veresov Attack, Dutch System: 30
 Queen's Pawn Game: Veresov, Richter Attack: 1
 Queen's Pawn Game: Zukertort Variation: 296
 Rapport-Jobava System: 176
 Rapport-Jobava System, with e6: 3
 Rat Defense: Accelerated Gurgenidze: 23
 Rat Defense: Balogh Defense: 1
 Rat Defense: English Rat: 126
 Rat Defense: Fuller Gambit: 4
 Rat Defense: Harmonist: 5
 Rat Defense: Small Center Defense: 1
 Richter-Veresov Attack: 43
 Richter-Veresov Attack: Richter Variation: 1
 Richter-Veresov Attack: Two Knights System: 11
 Richter-Veresov Attack: Two Knights System, Grünfeld Defense: 5
 Robatsch Defense: 33
 Rubinstein Opening: 36
 Rubinstein Opening: Bogoljubow Defense: 18
 Rubinstein Opening: Classical Defense: 12
 Ruy Lopez: 5
 Ruy Lopez: Alapin Defense: 2
 Ruy Lopez: Berlin Defense: 1671
 Ruy Lopez: Berlin Defense, Anderssen Variation: 1
 Ruy Lopez: Berlin Defense, Berlin Wall: 126
 Ruy Lopez: Berlin Defense, Beverwijk Variation: 37
 Ruy Lopez: Berlin Defense, Closed Showalter Variation: 2
 Ruy Lopez: Berlin Defense, Closed Wolf Variation: 6
 Ruy Lopez: Berlin Defense, Cordel Variation: 6
 Ruy Lopez: Berlin Defense, Duras Variation: 3
 Ruy Lopez: Berlin Defense, Hedgehog Variation: 9
 Ruy Lopez: Berlin Defense, Improved Steinitz Defense: 7
 Ruy Lopez: Berlin Defense, Kaufmann Variation: 3
 Ruy Lopez: Berlin Defense, Minckwitz Variation: 10
 Ruy Lopez: Berlin Defense, Mortimer Variation: 10
 Ruy Lopez: Berlin Defense, Nyholm Attack: 18
 Ruy Lopez: Berlin Defense, Pillsbury Variation: 4
 Ruy Lopez: Berlin Defense, Rio Gambit Accepted: 1339
 Ruy Lopez: Berlin Defense, Rio de Janeiro Variation: 37
 Ruy Lopez: Berlin Defense, Rosenthal Variation: 4
 Ruy Lopez: Berlin Defense, Trifunovic Variation: 2
 Ruy Lopez: Berlin Defense, Winawer Attack: 5
 Ruy Lopez: Berlin Defense, Zukertort Variation: 6
 Ruy Lopez: Berlin Defense, l'Hermet Variation: 17
 Ruy Lopez: Berlin Defense, l'Hermet Variation, Berlin Wall Defense: 1018
 Ruy Lopez: Berlin Defense, l'Hermet Variation, Westerinen Line: 15
 Ruy Lopez: Bird Variation: 39
 Ruy Lopez: Bulgarian Variation: 1
 Ruy Lopez: Classical Defense, Benelux Variation: 25
 Ruy Lopez: Classical Variation: 48
 Ruy Lopez: Classical Variation, Central Variation: 21
 Ruy Lopez: Classical Variation, Charousek Variation: 4
 Ruy Lopez: Classical Variation, Cordel Gambit: 8
 Ruy Lopez: Classical Variation, Modern Main Line: 25
 Ruy Lopez: Classical Variation, Zukertort Gambit: 7
 Ruy Lopez: Closed: 615
 Ruy Lopez: Closed, Anti-Marshall: 401
 Ruy Lopez: Closed, Averbakh Variation: 99
 Ruy Lopez: Closed, Balla Variation: 3
 Ruy Lopez: Closed, Bogoljubow Variation: 320
 Ruy Lopez: Closed, Borisenko Variation: 24
 Ruy Lopez: Closed, Breyer: 1
 Ruy Lopez: Closed, Breyer Defense: 29
 Ruy Lopez: Closed, Breyer Defense, Quiet Variation: 25
 Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid: 575
 Ruy Lopez: Closed, Center Attack: 12
 Ruy Lopez: Closed, Chigorin Defense: 260
 Ruy Lopez: Closed, Chigorin Defense, Gajewski Gambit: 25
 Ruy Lopez: Closed, Chigorin Defense, Panov System: 201
 Ruy Lopez: Closed, Delayed Exchange: 171
 Ruy Lopez: Closed, Flohr System: 656
 Ruy Lopez: Closed, Karpov Variation: 104
 Ruy Lopez: Closed, Keres Defense: 174
 Ruy Lopez: Closed, Kholmov Variation: 54
 Ruy Lopez: Closed, Martinez Variation: 760
 Ruy Lopez: Closed, Morphy Attack: 16
 Ruy Lopez: Closed, Pilnik Variation: 135
 Ruy Lopez: Closed, Rossolimo Defense: 1
 Ruy Lopez: Closed, Smyslov Defense: 45
 Ruy Lopez: Closed, Smyslov-Breyer-Zaitsev Hybrid: 109
 Ruy Lopez: Closed, Suetin Variation: 20
 Ruy Lopez: Closed, Trajkovic Counterattack: 14
 Ruy Lopez: Closed, Worrall Attack: 4
 Ruy Lopez: Closed, Worrall Attack, Castling Line: 33
 Ruy Lopez: Closed, Worrall Attack, Delayed Castling Line: 17
 Ruy Lopez: Closed, Yates Variation: 2
 Ruy Lopez: Closed, Yates Variation, Short Attack: 5
 Ruy Lopez: Closed, Zaitsev System: 174
 Ruy Lopez: Cozio Defense: 93
 Ruy Lopez: Cozio Defense, Paulsen Variation: 10
 Ruy Lopez: Exchange Variation: 17
 Ruy Lopez: Exchange Variation, Alapin Gambit: 149
 Ruy Lopez: Exchange Variation, Alekhine Variation: 3
 Ruy Lopez: Exchange Variation, Bronstein Variation: 77
 Ruy Lopez: Exchange Variation, Gligoric Variation: 225
 Ruy Lopez: Exchange Variation, Keres Variation: 55
 Ruy Lopez: Exchange Variation, King's Bishop Variation: 59
 Ruy Lopez: Exchange Variation, Normal Variation: 168
 Ruy Lopez: Exchange Variation, Romanovsky Variation: 1
 Ruy Lopez: Exchange, Alekhine Variation: 17
 Ruy Lopez: Fianchetto Defense: 140
 Ruy Lopez: Marshall Attack: 59
 Ruy Lopez: Marshall Attack, Main Line: 9
 Ruy Lopez: Marshall Attack, Main Line, Spassky Variation: 21
 Ruy Lopez: Marshall Attack, Modern Main Line: 121
 Ruy Lopez: Marshall Attack, Modern Variation: 198
 Ruy Lopez: Marshall Attack, Re3 Variation: 20
 Ruy Lopez: Morphy Defense: 504
 Ruy Lopez: Morphy Defense, Anderssen Variation: 422
 Ruy Lopez: Morphy Defense, Arkhangelsk Variation: 218
 Ruy Lopez: Morphy Defense, Bayreuth Variation: 22
 Ruy Lopez: Morphy Defense, Caro Variation: 6
 Ruy Lopez: Morphy Defense, Classical Defense Deferred: 39
 Ruy Lopez: Morphy Defense, Cozio Defense: 83
 Ruy Lopez: Morphy Defense, Duras Variation: 28
 Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred: 30
 Ruy Lopez: Morphy Defense, Jaffe Gambit: 1
 Ruy Lopez: Morphy Defense, Mackenzie Variation: 36
 Ruy Lopez: Morphy Defense, Modern Steinitz Defense: 345
 Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Fianchetto Variation: 117
 Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Siesta Variation: 6
 Ruy Lopez: Morphy Defense, Neo-Arkhangelsk Variation: 263
 Ruy Lopez: Morphy Defense, Norwegian Variation: 14
 Ruy Lopez: Morphy Defense, Norwegian Variation, Nightingale Gambit: 2
 Ruy Lopez: Morphy Defense, Schliemann Defense Deferred: 7
 Ruy Lopez: Morphy Defense, Steinitz Deferred: 38
 Ruy Lopez: Morphy Defense, Tarrasch Variation: 123
 Ruy Lopez: Morphy Defense, Wing Attack: 2
 Ruy Lopez: Morphy Defense, Wormald Attack: 74
 Ruy Lopez: Open: 61
 Ruy Lopez: Open Berlin Defense, Showalter Variation: 25
 Ruy Lopez: Open Berlin Defense, l'Hermet Variation: 409
 Ruy Lopez: Open, Berlin Variation: 5
 Ruy Lopez: Open, Bernstein Variation: 330
 Ruy Lopez: Open, Bernstein Variation, Luther Line: 1
 Ruy Lopez: Open, Breslau Variation: 1
 Ruy Lopez: Open, Classical Defense: 71
 Ruy Lopez: Open, Classical Defense, Main Line: 10
 Ruy Lopez: Open, Dilworth Variation: 25
 Ruy Lopez: Open, Howell Attack: 74
 Ruy Lopez: Open, Howell Attack, Ekstrom Variation: 3
 Ruy Lopez: Open, Italian Variation: 6
 Ruy Lopez: Open, Karpov Gambit: 19
 Ruy Lopez: Open, Main Line: 132
 Ruy Lopez: Open, Malkin Variation: 6
 Ruy Lopez: Open, Motzko Attack: 15
 Ruy Lopez: Open, Motzko Attack, Nenarokov Variation: 8
 Ruy Lopez: Open, Riga Variation: 3
 Ruy Lopez: Open, St. Petersburg Variation: 36
 Ruy Lopez: Schliemann Defense: 60
 Ruy Lopez: Schliemann Defense, Classical Variation: 8
 Ruy Lopez: Schliemann Defense, Dyckhoff Variation: 16
 Ruy Lopez: Schliemann Defense, Exchange Variation: 3
 Ruy Lopez: Schliemann Defense, Schönemann Attack: 3
 Ruy Lopez: Schliemann Defense, Tartakower Variation: 45
 Ruy Lopez: Steinitz Defense: 16
 Ruy Lopez: Steinitz Defense Deferred, Lipnitsky Variation: 1
 Ruy Lopez: Vinogradov Variation: 1
 Ruy Lopez: Wormald Attack, Grünfeld Variation: 2
 Réti Opening: 181
 Réti Opening: Advance Variation: 180
 Réti Opening: Advance Variation, Michel Gambit: 17
 Réti Opening: Anglo-Slav Variation, Bled Variation: 7
 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation: 15
 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation, Stonewall Line: 15
 Réti Opening: Anglo-Slav Variation, Capablanca Variation: 18
 Réti Opening: Anglo-Slav Variation, London Defensive System: 7
 Réti Opening: Anglo-Slav Variation, New York System: 4
 Réti Opening: Anglo-Slav Variation, Torre System: 12
 Réti Opening: Reversed Blumenfeld Gambit: 8
 Réti Opening: Réti Accepted: 31
 Réti Opening: Réti Gambit, Keres Variation: 5
 Saragossa Opening: 11
 Scandinavian Defense: 12
 Scandinavian Defense: Blackburne Gambit: 1
 Scandinavian Defense: Bronstein Variation: 53
 Scandinavian Defense: Classical Variation: 45
 Scandinavian Defense: Grünfeld Variation: 1
 Scandinavian Defense: Gubinsky-Melts Defense: 192
 Scandinavian Defense: Icelandic-Palme Gambit: 3
 Scandinavian Defense: Lasker Variation: 8
 Scandinavian Defense: Main Line: 107
 Scandinavian Defense: Main Line, Mieses Variation: 109
 Scandinavian Defense: Marshall Variation: 9
 Scandinavian Defense: Mieses-Kotroc Variation: 72
 Scandinavian Defense: Modern Variation: 17
 Scandinavian Defense: Modern Variation, Gipslis Variation: 12
 Scandinavian Defense: Panov Transfer: 28
 Scandinavian Defense: Portuguese Gambit, Banker Variation: 3
 Scandinavian Defense: Portuguese Gambit, Classical Variation: 2
 Scandinavian Defense: Portuguese Gambit, Wuss Variation: 5
 Scandinavian Defense: Richter Variation: 17
 Scandinavian Defense: Schiller-Pytel Variation: 25
 Scandinavian Defense: Schiller-Pytel Variation, Modern Variation: 1
 Scandinavian Defense: Valencian Variation: 37
 Scandinavian Defense: Valencian Variation, Ilundain Variation: 7
 Scandinavian Defense: Valencian Variation, Main Line: 14
 Scotch Game: 36
 Scotch Game: Benima Defense: 4
 Scotch Game: Blumenfeld Attack: 1
 Scotch Game: Classical Variation: 194
 Scotch Game: Classical Variation, Blackburne Attack: 6
 Scotch Game: Classical Variation, Intermezzo Variation: 261
 Scotch Game: Classical Variation, Millennium Variation: 7
 Scotch Game: Cochrane-Shumov Defense: 10
 Scotch Game: Göring Gambit: 3
 Scotch Game: Göring Gambit, Double Pawn Sacrifice: 1
 Scotch Game: Göring Gambit, Main Line: 1
 Scotch Game: Haxo Gambit: 1
 Scotch Game: Lolli Variation: 1
 Scotch Game: Malaniuk Variation: 77
 Scotch Game: Meitner Variation: 10
 Scotch Game: Mieses Variation: 416
 Scotch Game: Paulsen Attack: 8
 Scotch Game: Potter Variation: 135
 Scotch Game: Romanishin Variation: 22
 Scotch Game: Schmidt Variation: 210
 Scotch Game: Scotch Gambit: 1
 Scotch Game: Scotch Gambit, Advance Variation: 28
 Scotch Game: Scotch Gambit, Cochrane-Anderssen Variation: 2
 Scotch Game: Scotch Gambit, Göring Gambit Declined: 4
 Scotch Game: Scotch Gambit, Kingside Variation: 15
 Scotch Game: Scotch Gambit, Sarratt Variation: 3
 Scotch Game: Tartakower Variation: 27
 Semi-Slav Defense: 1158
 Semi-Slav Defense Accepted: 42
 Semi-Slav Defense: Accelerated Meran Variation: 449
 Semi-Slav Defense: Accelerated Move Order: 170
 Semi-Slav Defense: Anti-Moscow Gambit: 228
 Semi-Slav Defense: Anti-Noteboom, Stonewall Variation, Portisch Gambit: 4
 Semi-Slav Defense: Bogoljubow Variation: 13
 Semi-Slav Defense: Botvinnik Variation: 143
 Semi-Slav Defense: Botvinnik Variation, Alatortsev System: 2
 Semi-Slav Defense: Botvinnik Variation, Ekstrom Variation: 9
 Semi-Slav Defense: Botvinnik Variation, Lilienthal Variation: 40
 Semi-Slav Defense: Chigorin Defense: 775
 Semi-Slav Defense: Main Line: 45
 Semi-Slav Defense: Marshall Gambit: 21
 Semi-Slav Defense: Marshall Gambit, Forgotten Variation: 37
 Semi-Slav Defense: Marshall Gambit, Main Line: 77
 Semi-Slav Defense: Marshall Gambit, Tolush Variation: 1
 Semi-Slav Defense: Meran Variation: 274
 Semi-Slav Defense: Meran Variation, Blumenfeld Variation: 23
 Semi-Slav Defense: Meran Variation, Lundin Variation: 92
 Semi-Slav Defense: Meran Variation, Old Variation: 4
 Semi-Slav Defense: Meran Variation, Rabinovich Variation: 17
 Semi-Slav Defense: Meran Variation, Rellstab Attack: 2
 Semi-Slav Defense: Meran Variation, Reynolds' Variation: 66
 Semi-Slav Defense: Meran Variation, Sozin Variation: 12
 Semi-Slav Defense: Meran Variation, Wade Variation: 252
 Semi-Slav Defense: Meran Variation, Wade Variation, Kaidanov Gambit: 12
 Semi-Slav Defense: Meran Variation, Wade Variation, Larsen Variation: 74
 Semi-Slav Defense: Normal Variation: 186
 Semi-Slav Defense: Noteboom Variation: 19
 Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Gambit: 4
 Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation: 14
 Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation, Belyavsky Line: 2
 Semi-Slav Defense: Quiet Variation: 85
 Semi-Slav Defense: Romih Variation: 7
 Semi-Slav Defense: Rubinstein System: 4
 Semi-Slav Defense: Semi-Meran Variation: 2
 Semi-Slav Defense: Stoltz Variation: 758
 Semi-Slav Defense: Stoltz Variation, Center Variation: 31
 Semi-Slav Defense: Stoltz Variation, Center Variation, Mikhalchishin Line: 2
 Semi-Slav Defense: Stoltz Variation, Shabalov Attack: 126
 Sicilian Defense: 171
 Sicilian Defense: Accelerated Dragon: 9
 Sicilian Defense: Accelerated Dragon, Exchange Variation: 1
 Sicilian Defense: Accelerated Dragon, Maróczy Bind: 527
 Sicilian Defense: Accelerated Dragon, Maróczy Bind, Breyer Variation: 57
 Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze Variation: 143
 Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation: 341
 Sicilian Defense: Accelerated Dragon, Modern Variation: 67
 Sicilian Defense: Alapin Variation: 550
 Sicilian Defense: Alapin Variation, Barmen Defense: 168
 Sicilian Defense: Alapin Variation, Barmen Defense, Endgame Variation: 1
 Sicilian Defense: Alapin Variation, Barmen Defense, Milner-Barry Attack: 2
 Sicilian Defense: Alapin Variation, Barmen Defense, Modern Line: 120
 Sicilian Defense: Alapin Variation, Smith-Morra Declined: 264
 Sicilian Defense: Alapin Variation, Stoltz Attack: 113
 Sicilian Defense: Alapin Variation, Stoltz Attack, Ivanchuk Line: 33
 Sicilian Defense: Boleslavsky Variation: 112
 Sicilian Defense: Bowdler Attack: 2
 Sicilian Defense: Brick Variation: 1
 Sicilian Defense: Brussels Gambit: 1
 Sicilian Defense: Chekhover Variation: 305
 Sicilian Defense: Chekhover Variation, Zaitsev Defense: 5
 Sicilian Defense: Classical Variation: 194
 Sicilian Defense: Classical Variation, Anti-Sozin Variation: 130
 Sicilian Defense: Classical Variation, Dragon Transfer: 3
 Sicilian Defense: Classical Variation, Fianchetto Variation: 57
 Sicilian Defense: Classical Variation, Sozin Attack: 37
 Sicilian Defense: Closed: 652
 Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line: 32
 Sicilian Defense: Closed, Anti-Sveshnikov Variation, with Nf6: 45
 Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d6: 135
 Sicilian Defense: Closed, Botvinnik Defense, Edge Variation: 3
 Sicilian Defense: Closed, Botvinnik Defense, with Nge2: 10
 Sicilian Defense: Closed, Botvinnik Defense, with f4: 6
 Sicilian Defense: Closed, Chameleon Variation: 51
 Sicilian Defense: Closed, Fianchetto Variation: 4
 Sicilian Defense: Closed, Grob Attack: 1
 Sicilian Defense: Closed, Korchnoi Defense: 17
 Sicilian Defense: Closed, Smyslov Variation: 2
 Sicilian Defense: Closed, Traditional: 217
 Sicilian Defense: Delayed Alapin Variation: 343
 Sicilian Defense: Delayed Alapin Variation, with d6: 277
 Sicilian Defense: Delayed Alapin Variation, with e6: 392
 Sicilian Defense: Dragon Variation: 42
 Sicilian Defense: Dragon Variation, Classical Variation: 77
 Sicilian Defense: Dragon Variation, Classical Variation, Alekhine Line: 3
 Sicilian Defense: Dragon Variation, Classical Variation, Amsterdam Variation: 4
 Sicilian Defense: Dragon Variation, Classical Variation, Battery Variation: 34
 Sicilian Defense: Dragon Variation, Classical Variation, Grigoriev Variation: 14
 Sicilian Defense: Dragon Variation, Classical Variation, Maróczy Line: 2
 Sicilian Defense: Dragon Variation, Classical Variation, Normal Line: 7
 Sicilian Defense: Dragon Variation, Classical Variation, Spielmann Variation: 2
 Sicilian Defense: Dragon Variation, Classical Variation, Tartakower Line: 12
 Sicilian Defense: Dragon Variation, Fianchetto Variation: 37
 Sicilian Defense: Dragon Variation, Levenfish Variation: 4
 Sicilian Defense: Dragon Variation, Modern Bc4 Variation: 16
 Sicilian Defense: Dragon Variation, Yugoslav Attack: 100
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Belezky Line: 10
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Czerniak Variation: 6
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations: 14
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line: 2
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line: 196
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Old Line: 41
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Panov Variation: 44
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Soltis Variation: 1
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Sosonko Variation: 8
 Sicilian Defense: Drazic Variation: 1
 Sicilian Defense: Flohr Variation: 19
 Sicilian Defense: Four Knights Variation: 234
 Sicilian Defense: Four Knights Variation, Cobra Variation: 36
 Sicilian Defense: Four Knights Variation, Exchange Variation: 153
 Sicilian Defense: French Variation: 625
 Sicilian Defense: French Variation, Normal: 10
 Sicilian Defense: French Variation, Open: 14
 Sicilian Defense: French Variation, Westerinen Attack: 142
 Sicilian Defense: Gaw-Paw Variation: 2
 Sicilian Defense: Godiva Variation: 123
 Sicilian Defense: Grand Prix Attack: 40
 Sicilian Defense: Grand Prix Attack, Schofman Variation: 4
 Sicilian Defense: Heidenfeld Variation: 3
 Sicilian Defense: Hyperaccelerated Dragon: 85
 Sicilian Defense: Hyperaccelerated Fianchetto: 56
 Sicilian Defense: Hyperaccelerated Pterodactyl: 28
 Sicilian Defense: Hyperaccelerated Pterodactyl, Exchange Variation: 2
 Sicilian Defense: Kalashnikov Variation: 282
 Sicilian Defense: Kan Variation: 71
 Sicilian Defense: Kan Variation, Gipslis Variation: 15
 Sicilian Defense: Kan Variation, Knight Variation: 340
 Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein Variation: 13
 Sicilian Defense: Kan Variation, Maróczy Bind, Hedgehog Variation: 1
 Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation: 219
 Sicilian Defense: Kan Variation, Modern Variation: 344
 Sicilian Defense: Kan Variation, Polugaevsky Variation: 340
 Sicilian Defense: Kan Variation, Swiss Cheese Variation: 55
 Sicilian Defense: Kan Variation, Wing Attack: 148
 Sicilian Defense: Kan Variation, Wing Attack, Christiansen's Dream: 4
 Sicilian Defense: Kan Variation, Wing Attack, Fianchetto Variation: 8
 Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack: 49
 Sicilian Defense: Katalimov Variation: 15
 Sicilian Defense: Keres Variation: 82
 Sicilian Defense: Kopec System: 6
 Sicilian Defense: Kramnik Variation: 140
 Sicilian Defense: Kronberger Variation: 23
 Sicilian Defense: Kupreichik Variation: 54
 Sicilian Defense: Kveinis Variation: 33
 Sicilian Defense: Lasker-Dunne Attack: 38
 Sicilian Defense: Lasker-Pelikan Variation: 139
 Sicilian Defense: Lasker-Pelikan Variation, Bird Variation: 26
 Sicilian Defense: Lasker-Pelikan Variation, Schlechter Variation: 1
 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation: 280
 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation: 810
 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Novosibirsk Variation: 128
 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Peresypkin's Sacrifice: 7
 Sicilian Defense: Löwenthal Variation: 45
 Sicilian Defense: Marshall Counterattack: 1
 Sicilian Defense: McDonnell Attack: 40
 Sicilian Defense: McDonnell Attack, Tal Gambit: 13
 Sicilian Defense: Mengarini Variation: 7
 Sicilian Defense: Modern Variations: 264
 Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order: 38
 Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order Accepted: 13
 Sicilian Defense: Modern Variations, Ginsberg Gambit: 1
 Sicilian Defense: Modern Variations, Main Line: 25
 Sicilian Defense: Moscow Variation: 1014
 Sicilian Defense: Moscow Variation, Haag Gambit: 18
 Sicilian Defense: Moscow Variation, Main Line: 690
 Sicilian Defense: Moscow Variation, Moscow Gambit: 13
 Sicilian Defense: Moscow Variation, Sokolsky Variation: 404
 Sicilian Defense: Najdorf Variation: 1099
 Sicilian Defense: Najdorf Variation, Adams Attack: 421
 Sicilian Defense: Najdorf Variation, Amsterdam Variation: 242
 Sicilian Defense: Najdorf Variation, Browne Variation: 10
 Sicilian Defense: Najdorf Variation, English Attack: 1137
 Sicilian Defense: Najdorf Variation, English Attack, Anti-English: 226
 Sicilian Defense: Najdorf Variation, Freak Attack: 41
 Sicilian Defense: Najdorf Variation, Goteborg Variation: 6
 Sicilian Defense: Najdorf Variation, Lipnitsky Attack: 150
 Sicilian Defense: Najdorf Variation, Main Line: 61
 Sicilian Defense: Najdorf Variation, Neo-Classical Defense: 24
 Sicilian Defense: Najdorf Variation, Opocensky Variation: 321
 Sicilian Defense: Najdorf Variation, Opocensky Variation, Modern Line: 50
 Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line: 371
 Sicilian Defense: Najdorf Variation, Poisoned Pawn Accepted: 130
 Sicilian Defense: Najdorf Variation, Poisoned Pawn Variation: 123
 Sicilian Defense: Najdorf Variation, Polugaevsky Variation: 10
 Sicilian Defense: Najdorf Variation, Polugaevsky Variation, Simagin Line: 5
 Sicilian Defense: Najdorf Variation, Scheveningen Variation: 2
 Sicilian Defense: Najdorf Variation, Traditional Line: 8
 Sicilian Defense: Najdorf Variation, Zagreb Variation: 291
 Sicilian Defense: Nimzo-American Variation: 5
 Sicilian Defense: Nimzowitsch Variation: 3
 Sicilian Defense: Nimzowitsch Variation, Advance Variation: 26
 Sicilian Defense: Nimzowitsch Variation, Closed Variation: 48
 Sicilian Defense: Nimzowitsch Variation, Exchange Variation: 30
 Sicilian Defense: Nimzowitsch Variation, Main Line: 22
 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack: 1172
 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation: 814
 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Gufeld Gambit: 7
 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Lutikov Gambit: 5
 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Totsky Attack: 6
 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Gurgenidze Variation: 5
 Sicilian Defense: O'Kelly Variation, Aronin System: 2
 Sicilian Defense: O'Kelly Variation, Maróczy Bind: 4
 Sicilian Defense: O'Kelly Variation, Maróczy Bind, Geller Line: 8
 Sicilian Defense: O'Kelly Variation, Maróczy Bind, Paulsen Line: 21
 Sicilian Defense: O'Kelly Variation, Maróczy Bind, Robatsch Line: 8
 Sicilian Defense: O'Kelly Variation, Normal System: 1
 Sicilian Defense: O'Kelly Variation, Normal System, Taimanov Line: 1
 Sicilian Defense: O'Kelly Variation, Normal System, Zagorovsky Line: 1
 Sicilian Defense: O'Kelly Variation, Réti System: 9
 Sicilian Defense: O'Kelly Variation, Venice System: 54
 Sicilian Defense: O'Kelly Variation, Venice System, Barcza Line: 2
 Sicilian Defense: O'Kelly Variation, Venice System, Gambit Line: 10
 Sicilian Defense: O'Kelly Variation, Venice System, Ljubojevic Line: 1
 Sicilian Defense: O'Kelly Variation, Venice System, Steiner Line: 1
 Sicilian Defense: O'Kelly Variation, Wing Gambit: 1
 Sicilian Defense: O'Kelly Variation, Yerevan System: 23
 Sicilian Defense: Old Sicilian: 311
 Sicilian Defense: Open: 34
 Sicilian Defense: Paulsen-Basman Defense: 10
 Sicilian Defense: Pin Variation, Koch Variation: 7
 Sicilian Defense: Portsmouth Gambit: 1
 Sicilian Defense: Prins Variation: 156
 Sicilian Defense: Prins Variation, Venice Attack: 5
 Sicilian Defense: Quinteros Variation: 1
 Sicilian Defense: Richter-Rauzer Variation: 76
 Sicilian Defense: Richter-Rauzer Variation, Classical Variation: 291
 Sicilian Defense: Richter-Rauzer Variation, Classical Variation, Kantscher Line: 49
 Sicilian Defense: Richter-Rauzer Variation, Dragon Variation: 21
 Sicilian Defense: Richter-Rauzer Variation, Ivanov Variation: 53
 Sicilian Defense: Richter-Rauzer Variation, Modern Variation: 110
 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation: 345
 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations: 306
 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Nyezhmetdinov Attack: 39
 Sicilian Defense: Richter-Rauzer Variation, Podebrady Variation: 1
 Sicilian Defense: Richter-Rauzer Variation, Traditional Variation: 9
 Sicilian Defense: Richter-Rauzer Variation, Vitolins Variation: 11
 Sicilian Defense: Scheveningen Variation: 92
 Sicilian Defense: Scheveningen Variation, Classical Main Line: 74
 Sicilian Defense: Scheveningen Variation, Classical Variation: 439
 Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation: 31
 Sicilian Defense: Scheveningen Variation, Delayed Keres Attack: 82
 Sicilian Defense: Scheveningen Variation, Delayed Keres Attack, Perenyi Gambit: 19
 Sicilian Defense: Scheveningen Variation, English Attack, with Qd2: 27
 Sicilian Defense: Scheveningen Variation, English Attack, with f3: 248
 Sicilian Defense: Scheveningen Variation, Fianchetto Variation: 31
 Sicilian Defense: Scheveningen Variation, Keres Attack: 239
 Sicilian Defense: Scheveningen Variation, Matanovic Attack: 44
 Sicilian Defense: Scheveningen Variation, Modern Variation: 183
 Sicilian Defense: Scheveningen Variation, Tal Variation: 19
 Sicilian Defense: Smith-Morra Gambit: 3
 Sicilian Defense: Smith-Morra Gambit Accepted: 2
 Sicilian Defense: Smith-Morra Gambit Accepted, Classical Formation: 2
 Sicilian Defense: Smith-Morra Gambit Accepted, Paulsen Formation: 3
 Sicilian Defense: Smith-Morra Gambit Accepted, Scheveningen Formation: 1
 Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation: 1
 Sicilian Defense: Smith-Morra Gambit Declined, Center Formation: 1
 Sicilian Defense: Smith-Morra Gambit Declined, Scandinavian Formation: 2
 Sicilian Defense: Smith-Morra Gambit Deferred: 1
 Sicilian Defense: Snyder Variation: 60
 Sicilian Defense: Snyder Variation, Queen Fianchetto Variation: 6
 Sicilian Defense: Sozin Attack: 14
 Sicilian Defense: Sozin Attack, Fischer Variation: 4
 Sicilian Defense: Sozin Attack, Flank Variation: 83
 Sicilian Defense: Sozin Attack, Leonhardt Variation: 29
 Sicilian Defense: Sozin Attack, Main Line: 58
 Sicilian Defense: Spielmann Variation: 2
 Sicilian Defense: Staunton-Cochrane Variation: 14
 Sicilian Defense: Taimanov Variation: 629
 Sicilian Defense: Taimanov Variation, Bastrikov Variation: 940
 Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack: 581
 Sicilian Defense: Taimanov Variation, Bastrikov Variation, Ponomariov Gambit: 3
 Sicilian Defense: Taimanov Variation, Gary Gambit: 3
 Sicilian Defense: Taimanov Variation, Modern Line: 56
 Sicilian Defense: Taimanov Variation, Normal Variation: 167
 Sicilian Defense: Taimanov Variation, Szén Variation: 102
 Sicilian Defense: Velimirovic Attack: 40
 Sicilian Defense: Venice Attack: 5
 Sicilian Defense: Wing Gambit: 1
 Sicilian Defense: Wing Gambit Deferred: 3
 Sicilian Defense: Wing Gambit, Deferred Variation: 2
 Slav Defense: 1129
 Slav Defense: Alapin Variation: 23
 Slav Defense: Alekhine Variation: 44
 Slav Defense: Breyer Variation: 65
 Slav Defense: Chebanenko Variation: 834
 Slav Defense: Chebanenko Variation, Advance System: 340
 Slav Defense: Czech Variation: 8
 Slav Defense: Czech Variation, Bled Attack: 137
 Slav Defense: Czech Variation, Carlsbad Variation: 91
 Slav Defense: Czech Variation, Carlsbad Variation, Morozevich Variation: 113
 Slav Defense: Czech Variation, Classical System: 87
 Slav Defense: Czech Variation, Classical System, Main Line: 147
 Slav Defense: Czech Variation, Dutch Variation: 414
 Slav Defense: Czech Variation, Dutch Variation, Sämisch Variation: 2
 Slav Defense: Czech Variation, Krause Attack: 314
 Slav Defense: Czech Variation, Wiesbaden Variation: 107
 Slav Defense: Czech Variation, Wiesbaden Variation, Sharp Line: 109
 Slav Defense: Exchange Variation: 943
 Slav Defense: Exchange Variation, Schallopp Variation: 6
 Slav Defense: Exchange Variation, Symmetrical Line: 714
 Slav Defense: Exchange Variation, Trifunovic Variation: 98
 Slav Defense: Geller Gambit: 39
 Slav Defense: Modern Line: 797
 Slav Defense: Quiet Variation: 698
 Slav Defense: Quiet Variation, Amsterdam Variation: 8
 Slav Defense: Quiet Variation, Pin Defense: 642
 Slav Defense: Quiet Variation, Schallopp Defense: 1088
 Slav Defense: Schlechter Variation: 28
 Slav Defense: Slav Gambit, Alekhine Attack: 53
 Slav Defense: Smyslov Variation: 24
 Slav Defense: Soultanbeieff Variation: 308
 Slav Defense: Steiner Variation: 38
 Slav Defense: Süchting Variation: 16
 Slav Defense: Three Knights Variation: 5
 Slav Defense: Two Knights Attack: 16
 Slav Defense: Winawer Countergambit: 23
 Slav Indian: 116
 Slav Indian: Kudischewitsch Gambit: 8
 St. George Defense: 7
 St. George Defense: Polish Variation: 5
 Tarrasch Defense: 16
 Tarrasch Defense: Classical Variation: 98
 Tarrasch Defense: Classical Variation, Advance Variation: 42
 Tarrasch Defense: Classical Variation, Carlsbad Variation: 21
 Tarrasch Defense: Classical Variation, Chandler Variation: 1
 Tarrasch Defense: Classical Variation, Endgame Variation: 2
 Tarrasch Defense: Classical Variation, Main Line: 57
 Tarrasch Defense: Classical Variation, Petursson Variation: 7
 Tarrasch Defense: Classical Variation, Réti Variation: 26
 Tarrasch Defense: Classical Variation, Spassky Variation: 10
 Tarrasch Defense: Dubov Tarrasch: 57
 Tarrasch Defense: Grünfeld Gambit: 2
 Tarrasch Defense: Prague Variation: 7
 Tarrasch Defense: Prague Variation, Main Line: 5
 Tarrasch Defense: Schara Gambit: 23
 Tarrasch Defense: Swedish Variation: 8
 Tarrasch Defense: Symmetrical Variation: 303
 Tarrasch Defense: Two Knights Variation: 67
 Tarrasch Defense: Wagner Variation: 2
 Three Knights Opening: 22
 Three Knights Opening: Steinitz Defense: 3
 Three Knights Opening: Winawer Defense: 1
 Torre Attack: Classical Defense: 169
 Torre Attack: Classical Defense, Nimzowitsch Variation: 84
 Torre Attack: Classical Defense, Petrosian Gambit: 4
 Torre Attack: Fianchetto Defense: 310
 Torre Attack: Fianchetto Defense, Euwe Variation: 35
 Trompowsky Attack: 718
 Trompowsky Attack: Classical Defense: 104
 Trompowsky Attack: Classical Defense, Big Center Variation: 111
 Trompowsky Attack: Edge Variation: 19
 Trompowsky Attack: Poisoned Pawn Variation: 8
 Trompowsky Attack: Raptor Variation: 20
 Van Geet Opening: 27
 Van Geet Opening: Berlin Gambit: 1
 Van Geet Opening: Grünfeld Defense: 1
 Van Geet Opening: Napoleon Attack: 4
 Van Geet Opening: Sicilian Two Knights: 1
 Van't Kruijs Opening: 23
 Vienna Gambit, with Max Lange Defense: 1
 Vienna Gambit, with Max Lange Defense: Knight Variation: 1
 Vienna Gambit, with Max Lange Defense: Pierce Gambit: 1
 Vienna Gambit, with Max Lange Defense: Quelle Gambit: 1
 Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Paulsen Defense: 2
 Vienna Game: 2
 Vienna Game: Anderssen Defense: 8
 Vienna Game: Falkbeer Variation: 13
 Vienna Game: Frankenstein-Dracula Variation: 17
 Vienna Game: Hamppe-Meitner Variation: 4
 Vienna Game: Max Lange Defense: 2
 Vienna Game: Mengarini Variation: 1
 Vienna Game: Mieses Variation: 131
 Vienna Game: Omaha Gambit: 1
 Vienna Game: Paulsen Variation: 32
 Vienna Game: Paulsen Variation, Mariotti Gambit: 1
 Vienna Game: Stanley Variation: 5
 Vienna Game: Stanley Variation, Alekhine Variation: 2
 Vienna Game: Stanley Variation, Monster Declined: 7
 Vienna Game: Stanley Variation, Reversed Spanish: 8
 Vienna Game: Vienna Gambit: 1
 Vienna Game: Vienna Gambit, Bardeleben Variation: 1
 Vienna Game: Vienna Gambit, Breyer Variation: 5
 Vienna Game: Vienna Gambit, Kaufmann Variation: 1
 Vienna Game: Vienna Gambit, Main Line: 6
 Vienna Game: Vienna Gambit, Modern Variation: 4
 Vienna Game: Vienna Gambit, Paulsen Attack: 17
 Wade Defense: 196
 Ware Opening: 14
 Ware Opening: Symmetric Variation: 1
 Yusupov-Rubinstein System: 209
 Zukertort Opening: 740
 Zukertort Opening: Basman Defense: 2
 Zukertort Opening: Black Mustang Defense: 2
 Zukertort Opening: Double Fianchetto Attack: 7
 Zukertort Opening: Dutch Variation: 194
 Zukertort Opening: Kingside Fianchetto: 265
 Zukertort Opening: Lemberger Gambit: 2
 Zukertort Opening: Lisitsyn Gambit: 3
 Zukertort Opening: Lisitsyn Gambit Deferred: 2
 Zukertort Opening: Nimzo-Larsen Variation: 191
 Zukertort Opening: Old Indian Attack: 17
 Zukertort Opening: Pirc Invitation: 63
 Zukertort Opening: Polish Defense: 11
 Zukertort Opening: Queen's Gambit Invitation: 59
 Zukertort Opening: Queenside Fianchetto Variation: 66
 Zukertort Opening: Quiet System: 34
 Zukertort Opening: Reversed Grünfeld: 160
 Zukertort Opening: Reversed Mexican Defense: 2
 Zukertort Opening: Santasiere's Folly: 2
 Zukertort Opening: Sicilian Invitation: 372
 Zukertort Opening: Slav Invitation: 3
 Zukertort Opening: Wade Defense: 3
 Zukertort Opening: Wade Defense, Chigorin Plan: 9
diff --git a/short_games.txt b/short_games.txt
 Persistent variable 'ecos': Dictionary with 456 entries:
 <None>: 690
 A00: 123
 A01: 51
 A02: 8
 A03: 12
 A04: 160
 A05: 317
 A06: 47
 A07: 280
 A08: 29
 A09: 48
 A10: 62
 A11: 40
 A12: 13
 A13: 178
 A14: 57
 A15: 297
 A16: 95
 A17: 49
 A18: 14
 A19: 4
 A20: 47
 A21: 39
 A22: 36
 A23: 3
 A25: 33
 A26: 15
 A27: 11
 A28: 69
 A29: 105
 A30: 228
 A31: 14
 A32: 11
 A33: 74
 A34: 117
 A35: 46
 A36: 130
 A37: 104
 A38: 56
 A39: 32
 A40: 159
 A41: 86
 A42: 15
 A43: 23
 A44: 3
 A45: 150
 A46: 260
 A47: 17
 A48: 133
 A49: 76
 A50: 47
 A52: 5
 A53: 28
 A54: 11
 A55: 9
 A56: 36
 A57: 18
 A58: 12
 A59: 4
 A60: 1
 A61: 12
 A62: 12
 A63: 5
 A64: 4
 A65: 5
 A67: 2
 A70: 7
 A74: 1
 A75: 1
 A77: 3
 A80: 21
 A81: 27
 A83: 1
 A84: 10
 A85: 13
 A86: 1
 A87: 8
 A88: 15
 A89: 5
 A90: 32
 A91: 2
 A94: 1
 A96: 2
 B00: 184
 B01: 110
 B02: 22
 B03: 11
 B04: 39
 B05: 11
 B06: 83
 B07: 66
 B08: 99
 B09: 59
 B10: 117
 B11: 56
 B12: 147
 B13: 114
 B14: 73
 B15: 32
 B16: 3
 B17: 101
 B18: 114
 B19: 125
 B20: 36
 B21: 11
 B22: 260
 B23: 75
 B24: 8
 B25: 19
 B26: 8
 B27: 32
 B28: 23
 B29: 11
 B30: 197
 B31: 66
 B32: 44
 B33: 181
 B34: 8
 B35: 30
 B36: 50
 B37: 3
 B38: 22
 B39: 8
 B40: 211
 B41: 31
 B42: 103
 B43: 56
 B44: 20
 B45: 13
 B46: 48
 B47: 83
 B48: 37
 B49: 4
 B50: 84
 B51: 107
 B52: 265
 B53: 27
 B54: 20
 B55: 2
 B56: 39
 B57: 17
 B58: 36
 B59: 8
 B60: 14
 B61: 6
 B62: 2
 B63: 16
 B64: 4
 B65: 7
 B66: 22
 B67: 15
 B68: 1
 B69: 1
 B70: 14
 B71: 2
 B72: 3
 B73: 5
 B74: 3
 B75: 6
 B76: 11
 B77: 4
 B78: 4
 B80: 19
 B81: 16
 B82: 6
 B83: 35
 B84: 40
 B85: 7
 B86: 4
 B87: 5
 B88: 3
 B89: 9
 B90: 218
 B91: 18
 B92: 70
 B93: 21
 B94: 3
 B96: 21
 B97: 4
 B98: 3
 B99: 5
 C00: 57
 C01: 228
 C02: 53
 C03: 53
 C04: 7
 C05: 24
 C06: 19
 C07: 128
 C08: 38
 C09: 25
 C10: 137
 C11: 146
 C12: 4
 C13: 2
 C14: 14
 C15: 47
 C16: 19
 C17: 6
 C18: 12
 C19: 34
 C20: 18
 C21: 1
 C22: 2
 C24: 30
 C25: 9
 C26: 17
 C27: 4
 C28: 1
 C29: 7
 C30: 1
 C31: 1
 C33: 3
 C34: 1
 C40: 4
 C41: 83
 C42: 404
 C43: 75
 C44: 27
 C45: 162
 C46: 7
 C47: 205
 C48: 98
 C49: 53
 C50: 64
 C51: 4
 C54: 205
 C55: 55
 C56: 10
 C58: 3
 C59: 3
 C60: 25
 C61: 12
 C62: 5
 C63: 14
 C64: 13
 C65: 110
 C66: 3
 C67: 596
 C68: 37
 C69: 171
 C70: 23
 C71: 6
 C72: 13
 C74: 1
 C75: 8
 C76: 13
 C77: 61
 C78: 52
 C79: 2
 C80: 17
 C81: 3
 C82: 2
 C83: 2
 C84: 29
 C85: 37
 C86: 7
 C87: 6
 C88: 59
 C89: 10
 C90: 21
 C91: 25
 C92: 412
 C93: 3
 C94: 5
 C95: 37
 C96: 29
 C97: 25
 C98: 4
 C99: 16
 D00: 75
 D01: 17
 D02: 280
 D03: 21
 D04: 16
 D05: 17
 D06: 16
 D07: 22
 D08: 2
 D09: 1
 D10: 395
 D11: 264
 D12: 158
 D13: 153
 D14: 527
 D15: 191
 D16: 45
 D17: 65
 D18: 18
 D19: 66
 D20: 216
 D21: 20
 D22: 17
 D23: 11
 D24: 5
 D25: 41
 D26: 56
 D27: 251
 D28: 9
 D29: 11
 D30: 141
 D31: 159
 D32: 74
 D33: 1
 D34: 30
 D35: 107
 D36: 5
 D37: 402
 D38: 171
 D39: 12
 D40: 2
 D41: 61
 D42: 11
 D43: 148
 D44: 14
 D45: 181
 D46: 90
 D47: 77
 D48: 6
 D49: 1
 D50: 3
 D51: 5
 D52: 27
 D53: 9
 D54: 1
 D55: 90
 D56: 61
 D57: 3
 D58: 122
 D59: 30
 D60: 12
 D61: 11
 D62: 7
 D63: 16
 D64: 1
 D65: 1
 D66: 3
 D67: 10
 D68: 6
 D69: 4
 D70: 1
 D71: 8
 D74: 2
 D75: 6
 D76: 10
 D77: 42
 D78: 59
 D79: 132
 D80: 34
 D81: 4
 D82: 18
 D83: 5
 D84: 1
 D85: 166
 D86: 19
 D87: 5
 D88: 1
 D90: 19
 D91: 29
 D92: 18
 D93: 9
 D94: 28
 D95: 3
 D97: 18
 D98: 3
 D99: 1
 E00: 73
 E01: 8
 E02: 9
 E03: 2
 E04: 91
 E05: 216
 E06: 45
 E07: 5
 E08: 47
 E09: 9
 E10: 117
 E11: 443
 E12: 228
 E13: 4
 E14: 54
 E15: 368
 E16: 68
 E17: 78
 E18: 256
 E19: 47
 E20: 50
 E21: 29
 E22: 2
 E23: 1
 E25: 8
 E26: 1
 E27: 1
 E28: 1
 E29: 5
 E30: 5
 E31: 4
 E32: 154
 E33: 8
 E34: 31
 E35: 28
 E36: 10
 E37: 9
 E38: 27
 E39: 36
 E40: 9
 E41: 22
 E42: 28
 E43: 20
 E44: 10
 E45: 1
 E46: 44
 E47: 14
 E48: 16
 E49: 6
 E50: 1
 E51: 10
 E52: 12
 E53: 21
 E54: 11
 E55: 17
 E56: 3
 E58: 13
 E59: 6
 E60: 217
 E61: 32
 E62: 74
 E63: 48
 E64: 11
 E65: 16
 E66: 3
 E67: 15
 E68: 23
 E69: 10
 E70: 30
 E71: 15
 E73: 21
 E74: 6
 E75: 1
 E76: 7
 E77: 3
 E80: 3
 E81: 28
 E83: 6
 E84: 6
 E86: 9
 E87: 7
 E90: 21
 E91: 44
 E92: 131
 E94: 65
 E95: 3
 E96: 3
 E97: 43
 E98: 12
 E99: 1

 Persistent variable 'openings': Dictionary with 1336 entries:
 <None>: 690
 Alekhine Defense: 1
 Alekhine Defense: Exchange Variation: 7
 Alekhine Defense: Exchange Variation, Voronezh Variation: 1
 Alekhine Defense: Four Pawns Attack: 1
 Alekhine Defense: Four Pawns Attack, Main Line: 1
 Alekhine Defense: Four Pawns Attack, Trifunovic Variation: 1
 Alekhine Defense: Kmoch Variation: 5
 Alekhine Defense: Maróczy Variation: 1
 Alekhine Defense: Modern Variation: 4
 Alekhine Defense: Modern Variation, Alburt Variation: 4
 Alekhine Defense: Modern Variation, Flohr Variation: 3
 Alekhine Defense: Modern Variation, Keres Variation: 3
 Alekhine Defense: Modern Variation, Larsen Variation: 26
 Alekhine Defense: Modern Variation, Larsen-Haakert Variation: 1
 Alekhine Defense: Modern Variation, Main Line: 8
 Alekhine Defense: Modern Variation, Schmid Variation: 1
 Alekhine Defense: Normal Variation: 2
 Alekhine Defense: Scandinavian Variation: 7
 Alekhine Defense: Spielmann Gambit: 1
 Alekhine Defense: Sämisch Attack: 3
 Alekhine Defense: Two Pawns Attack, Lasker Variation: 2
 Anderssen's Opening: 5
 Barnes Opening: 1
 Benko Gambit: 1
 Benko Gambit Accepted: Dlugy Variation: 1
 Benko Gambit Accepted: Fianchetto Variation: 4
 Benko Gambit Accepted: Fully Accepted Variation: 8
 Benko Gambit Accepted: King Walk Variation: 4
 Benko Gambit Accepted: Pawn Return Variation: 7
 Benko Gambit Declined: Main Line: 8
 Benko Gambit Declined: Quiet Line: 1
 Benoni Defense: 22
 Benoni Defense: Benoni Gambit Accepted: 1
 Benoni Defense: Benoni-Indian Defense, Kingside Move Order: 9
 Benoni Defense: Classical Variation: 1
 Benoni Defense: Classical Variation, Argentine Counterattack: 1
 Benoni Defense: Classical Variation, Czerniak Defense, Tal Line: 3
 Benoni Defense: Classical Variation, Full Line: 1
 Benoni Defense: Classical Variation, New York Variation: 6
 Benoni Defense: Czech Benoni Defense: 7
 Benoni Defense: Fianchetto Variation: 12
 Benoni Defense: Fianchetto Variation, Hastings Defense: 5
 Benoni Defense: Fianchetto Variation, Hastings Defense, Main Line: 4
 Benoni Defense: French Benoni: 1
 Benoni Defense: Hromádka System: 2
 Benoni Defense: King's Indian System: 2
 Benoni Defense: King's Pawn Line: 5
 Benoni Defense: Knight's Tour Variation: 4
 Benoni Defense: Modern Variation, Snake Variation: 1
 Benoni Defense: Old Benoni: 7
 Benoni Defense: Old Benoni, Mujannah Formation: 1
 Benoni Defense: Semi-Benoni: 3
 Benoni Defense: Taimanov Variation: 2
 Bird Opening: 7
 Bird Opening: Dutch Variation: 12
 Bird Opening: From's Gambit: 1
 Bishop's Opening: Berlin Defense: 16
 Bishop's Opening: Boden-Kieseritzky Gambit: 1
 Bishop's Opening: Vienna Hybrid: 14
 Bishop's Opening: Vienna Hybrid, Hromádka Variation: 1
 Bishop's Opening: Vienna Hybrid, Spielmann Attack: 4
 Blackmar-Diemer Gambit: 1
 Blumenfeld Countergambit: 1
 Blumenfeld Countergambit Accepted: 3
 Blumenfeld Countergambit: Duz-Khotimirsky Variation: 3
 Bogo-Indian Defense: 2
 Bogo-Indian Defense: Exchange Variation: 67
 Bogo-Indian Defense: Grünfeld Variation: 74
 Bogo-Indian Defense: Monticelli Trap: 2
 Bogo-Indian Defense: Nimzowitsch Variation: 92
 Bogo-Indian Defense: Retreat Variation: 121
 Bogo-Indian Defense: Vitolins Variation: 41
 Bogo-Indian Defense: Wade-Smyslov Variation: 44
 Bongcloud Attack: 3
 Borg Defense: 1
 Caro-Kann Defense: 17
 Caro-Kann Defense: Accelerated Panov Attack: 3
 Caro-Kann Defense: Accelerated Panov Attack, Modern Variation: 49
 Caro-Kann Defense: Accelerated Panov Attack, Open Variation: 3
 Caro-Kann Defense: Advance Variation: 23
 Caro-Kann Defense: Advance Variation, Bayonet Attack: 1
 Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense: 17
 Caro-Kann Defense: Advance Variation, Bronstein Variation: 1
 Caro-Kann Defense: Advance Variation, Short Variation: 62
 Caro-Kann Defense: Advance Variation, Tal Variation: 13
 Caro-Kann Defense: Advance Variation, Van der Wiel Attack: 10
 Caro-Kann Defense: Advance Variation, Van der Wiel Attack, Dreyev Defense: 2
 Caro-Kann Defense: Apocalypse Attack: 3
 Caro-Kann Defense: Breyer Variation: 17
 Caro-Kann Defense: Breyer Variation, Stein Attack: 1
 Caro-Kann Defense: Bronstein-Larsen Variation: 3
 Caro-Kann Defense: Classical Variation: 70
 Caro-Kann Defense: Classical Variation, Flohr Variation: 15
 Caro-Kann Defense: Classical Variation, Lobron System: 19
 Caro-Kann Defense: Classical Variation, Main Line: 33
 Caro-Kann Defense: Classical Variation, Spassky Variation: 102
 Caro-Kann Defense: De Bruycker Defense: 2
 Caro-Kann Defense: Endgame Offer: 4
 Caro-Kann Defense: Endgame Variation: 5
 Caro-Kann Defense: Euwe Attack: 1
 Caro-Kann Defense: Exchange Variation: 51
 Caro-Kann Defense: Exchange Variation, Rubinstein Variation: 18
 Caro-Kann Defense: Forgacs Variation: 8
 Caro-Kann Defense: Goldman Variation: 1
 Caro-Kann Defense: Gurgenidze System: 5
 Caro-Kann Defense: Karpov Variation: 70
 Caro-Kann Defense: Karpov Variation, Modern Main Line: 7
 Caro-Kann Defense: Karpov Variation, Modern Variation: 3
 Caro-Kann Defense: Karpov Variation, Modern Variation, Kasparov Attack: 6
 Caro-Kann Defense: Karpov Variation, Smyslov Variation: 5
 Caro-Kann Defense: Karpov Variation, Smyslov Variation, Main Line: 3
 Caro-Kann Defense: Karpov Variation, Tiviakov-Fischer Attack: 7
 Caro-Kann Defense: Main Line: 1
 Caro-Kann Defense: Maróczy Variation: 10
 Caro-Kann Defense: Modern Variation: 1
 Caro-Kann Defense: Panov Attack: 21
 Caro-Kann Defense: Panov Attack, Fianchetto Defense: 8
 Caro-Kann Defense: Panov Attack, Fianchetto Defense, Fianchetto Gambit: 1
 Caro-Kann Defense: Panov Attack, Main Line: 46
 Caro-Kann Defense: Panov Attack, Modern Defense: 21
 Caro-Kann Defense: Panov Attack, Modern Defense, Carlsbad Line: 1
 Caro-Kann Defense: Panov Attack, Modern Defense, Czerniak Line: 3
 Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line: 16
 Caro-Kann Defense: Panov-Botvinnik, Herzog Defense: 1
 Caro-Kann Defense: Tartakower Variation: 17
 Caro-Kann Defense: Two Knights Attack: 19
 Caro-Kann Defense: Two Knights Attack, Mindeno Variation: 6
 Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line: 49
 Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Retreat Line: 1
 Catalan Opening: 72
 Catalan Opening: Closed: 103
 Catalan Opening: Closed Variation, Traditional Variation: 6
 Catalan Opening: Closed, Botvinnik Variation: 2
 Catalan Opening: Closed, Main Line: 3
 Catalan Opening: Open Defense: 85
 Catalan Opening: Open Defense, Classical Line: 216
 Catalan Opening: Open Defense, Modern Sharp Variation: 17
 Center Game: Berger Variation: 2
 Center Game: Kieseritzky Variation: 1
 Clemenz Opening: 1
 Colle System: Rhamphorhynchus Variation: 1
 Czech Defense: 12
 Dutch Defense: 13
 Dutch Defense: Classical Variation: 16
 Dutch Defense: Classical Variation, Buenos Aires Variation: 1
 Dutch Defense: Classical Variation, Huisl Variation: 1
 Dutch Defense: Fianchetto Attack: 5
 Dutch Defense: Fianchetto Variation: 1
 Dutch Defense: Hopton Attack: 4
 Dutch Defense: Leningrad Variation: 8
 Dutch Defense: Leningrad Variation, Matulovic Variation: 5
 Dutch Defense: Leningrad Variation, Warsaw Variation: 15
 Dutch Defense: Normal Variation: 1
 Dutch Defense: Queen's Knight Variation: 13
 Dutch Defense: Raphael Variation: 2
 Dutch Defense: Rubinstein Variation: 6
 Dutch Defense: Semi-Leningrad Variation: 22
 Dutch Defense: Staunton Gambit: 1
 Dutch Defense: Stonewall Variation: 1
 Dutch Defense: Stonewall Variation, Modern Variation: 21
 East Indian Defense: 23
 Elephant Gambit: 1
 English Defense: 21
 English Defense: Perrin Variation: 5
 English Opening: 18
 English Opening: Adorjan Defense: 4
 English Opening: Agincourt Defense: 76
 English Opening: Agincourt Defense, Bogoljubow Defense: 1
 English Opening: Agincourt Defense, Catalan Defense: 1
 English Opening: Agincourt Defense, Catalan Defense Accepted: 41
 English Opening: Agincourt Defense, Keres Defense: 15
 English Opening: Agincourt Defense, Kurajica Defense: 1
 English Opening: Agincourt Defense, Neo-Catalan Declined: 37
 English Opening: Agincourt Defense, Tarrasch Defense: 4
 English Opening: Agincourt Defense, Wimpy System: 4
 English Opening: Anglo-Dutch Defense: 8
 English Opening: Anglo-Grünfeld Defense: 1
 English Opening: Anglo-Indian Defense: 25
 English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation: 68
 English Opening: Anglo-Indian Defense, Anti-Anti-Grünfeld: 2
 English Opening: Anglo-Indian Defense, Flohr-Mikenas-Carls Variation, Nei Gambit: 1
 English Opening: Anglo-Indian Defense, King's Indian Formation: 76
 English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto: 13
 English Opening: Anglo-Indian Defense, King's Knight Variation: 86
 English Opening: Anglo-Indian Defense, Nimzo-English: 42
 English Opening: Anglo-Indian Defense, Old Indian Formation: 4
 English Opening: Anglo-Indian Defense, Queen's Indian Formation: 83
 English Opening: Anglo-Indian Defense, Queen's Knight Variation: 26
 English Opening: Anglo-Indian Defense, Romanishin Variation: 7
 English Opening: Anglo-Indian Defense, Scandinavian Defense: 1
 English Opening: Anglo-Indian Defense, Slav Formation: 6
 English Opening: Anglo-Indian Defense, Zvjaginsev-Krasenkow Attack: 1
 English Opening: Anglo-Scandinavian Defense: 1
 English Opening: Carls-Bremen System: 7
 English Opening: Caro-Kann Defensive System: 40
 English Opening: Closed, Taimanov Variation: 1
 English Opening: Four Knights System, Nimzowitsch Variation: 5
 English Opening: Great Snake Variation: 30
 English Opening: King's English Variation: 50
 English Opening: King's English Variation, Botvinnik System: 7
 English Opening: King's English Variation, Botvinnik System, Prickly Pawn Pass System: 1
 English Opening: King's English Variation, Closed System: 7
 English Opening: King's English Variation, Closed System, Full Symmetry: 8
 English Opening: King's English Variation, Four Knights Variation: 4
 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line: 62
 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6: 43
 English Opening: King's English Variation, Four Knights Variation, Flexible Line: 24
 English Opening: King's English Variation, Four Knights Variation, Korchnoi Line: 12
 English Opening: King's English Variation, Four Knights Variation, Quiet Line: 24
 English Opening: King's English Variation, Hungarian Attack: 2
 English Opening: King's English Variation, Kramnik-Shirov Counterattack: 22
 English Opening: King's English Variation, Nimzowitsch-Flohr Variation: 1
 English Opening: King's English Variation, Reversed Closed Sicilian: 10
 English Opening: King's English Variation, Reversed Sicilian: 12
 English Opening: King's English Variation, Taimanov Variation: 13
 English Opening: King's English Variation, Three Knights System: 11
 English Opening: King's English Variation, Troger Defense: 1
 English Opening: King's English Variation, Two Knights Variation: 7
 English Opening: King's English Variation, Two Knights Variation, Keres Variation: 3
 English Opening: King's English Variation, Two Knights Variation, Reversed Dragon: 3
 English Opening: King's English Variation, Two Knights Variation, Smyslov System: 19
 English Opening: Mikenas-Carls Variation: 14
 English Opening: Mikenas-Carls, Sicilian: 3
 English Opening: Neo-Catalan: 31
 English Opening: Neo-Catalan Declined: 2
 English Opening: Romanishin Gambit: 17
 English Opening: Symmetrical Variation: 136
 English Opening: Symmetrical Variation, Anti-Benoni Variation: 14
 English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation: 7
 English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense: 78
 English Opening: Symmetrical Variation, Botvinnik System: 9
 English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3: 31
 English Opening: Symmetrical Variation, Botvinnik System Reversed, with e3: 10
 English Opening: Symmetrical Variation, Double Fianchetto: 1
 English Opening: Symmetrical Variation, Duchamp Variation: 35
 English Opening: Symmetrical Variation, Fianchetto Variation: 8
 English Opening: Symmetrical Variation, Four Knights Variation: 41
 English Opening: Symmetrical Variation, Full Symmetry Line: 20
 English Opening: Symmetrical Variation, Hedgehog Defense: 84
 English Opening: Symmetrical Variation, Mecking Variation: 32
 English Opening: Symmetrical Variation, Normal Variation: 7
 English Opening: Symmetrical Variation, Rubinstein Variation: 17
 English Opening: Symmetrical Variation, Three Knights Variation: 84
 English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation: 73
 English Opening: Symmetrical Variation, Two Knights Variation: 5
 English Opening: Symmetrical Variation, Ultra-Symmetrical Variation: 111
 English Opening: Symmetrical, Hedgehog, Flexible Formation: 9
 Englund Gambit Declined: Reversed French: 1
 Englund Gambit: Mosquito Gambit: 1
 Four Knights Game: 11
 Four Knights Game: Glek System: 16
 Four Knights Game: Gunsberg Variation: 10
 Four Knights Game: Italian Variation: 2
 Four Knights Game: Scotch Variation: 4
 Four Knights Game: Scotch Variation Accepted: 158
 Four Knights Game: Scotch Variation, Krause Gambit: 1
 Four Knights Game: Scotch Variation, Krause Gambit, Leonhardt Defense: 1
 Four Knights Game: Scotch Variation, Schmid Defense: 3
 Four Knights Game: Spanish Variation: 20
 Four Knights Game: Spanish Variation, Classical Variation: 1
 Four Knights Game: Spanish Variation, Double Spanish: 6
 Four Knights Game: Spanish Variation, Janowski Variation: 3
 Four Knights Game: Spanish Variation, Nimzowitsch Variation: 13
 Four Knights Game: Spanish Variation, Rubinstein Variation: 18
 Four Knights Game: Spanish Variation, Rubinstein Variation Accepted: 64
 Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation: 2
 Four Knights Game: Spanish Variation, Symmetrical Variation: 16
 Four Knights Game: Spanish Variation, Symmetrical Variation, Metger Unpin: 8
 French Defense: 5
 French Defense: Advance Variation: 7
 French Defense: Advance Variation, Euwe Variation: 17
 French Defense: Advance Variation, Extended Bishop Swap: 2
 French Defense: Advance Variation, Lputian Variation: 2
 French Defense: Advance Variation, Main Line: 9
 French Defense: Advance Variation, Nimzowitsch System: 1
 French Defense: Advance Variation, Paulsen Attack: 7
 French Defense: Advance Variation, Wade Variation: 8
 French Defense: Alekhine-Chatard Attack: 2
 French Defense: Burn Variation: 61
 French Defense: Chigorin Variation: 7
 French Defense: Classical Variation, Burn Variation, Main Line: 14
 French Defense: Classical Variation, Burn Variation, Morozevich Line: 14
 French Defense: Classical Variation, Pollock Variation: 1
 French Defense: Classical Variation, Rubinstein Variation: 1
 French Defense: Classical Variation, Steinitz Variation: 16
 French Defense: Classical Variation, Swiss Variation: 3
 French Defense: Exchange Variation: 206
 French Defense: Exchange Variation, Monte Carlo Variation: 22
 French Defense: Franco-Sicilian Defense: 1
 French Defense: Horwitz Attack, Papa-Ticulat Gambit: 1
 French Defense: King's Indian Attack: 26
 French Defense: Knight Variation: 4
 French Defense: MacCutcheon Variation, Exchange Variation: 1
 French Defense: MacCutcheon Variation, Lasker Variation: 3
 French Defense: MacCutcheon Variation, Wolf Gambit: 2
 French Defense: Normal Variation: 1
 French Defense: Paulsen Variation: 19
 French Defense: Rubinstein Variation: 2
 French Defense: Rubinstein Variation, Blackburne Defense: 68
 French Defense: Rubinstein Variation, Capablanca Line: 1
 French Defense: Rubinstein Variation, Fort Knox Variation: 31
 French Defense: Rubinstein Variation, Kasparov Attack: 16
 French Defense: Schlechter Variation: 5
 French Defense: St. George Defense: 1
 French Defense: Steiner Variation: 5
 French Defense: Steinitz Variation: 10
 French Defense: Steinitz Variation, Boleslavsky Variation: 40
 French Defense: Tarrasch Variation: 8
 French Defense: Tarrasch Variation, Botvinnik Variation: 6
 French Defense: Tarrasch Variation, Chistyakov Defense: 59
 French Defense: Tarrasch Variation, Chistyakov Defense, Modern Line: 9
 French Defense: Tarrasch Variation, Closed Variation: 14
 French Defense: Tarrasch Variation, Closed Variation, Main Line: 19
 French Defense: Tarrasch Variation, Eliskases Variation: 9
 French Defense: Tarrasch Variation, Guimard Defense: 1
 French Defense: Tarrasch Variation, Guimard Defense, Main Line: 7
 French Defense: Tarrasch Variation, Haberditz Variation: 1
 French Defense: Tarrasch Variation, Modern System: 17
 French Defense: Tarrasch Variation, Morozevich Variation: 26
 French Defense: Tarrasch Variation, Open System: 38
 French Defense: Tarrasch Variation, Open System, Advance Line: 1
 French Defense: Tarrasch Variation, Open System, Euwe-Keres Line: 49
 French Defense: Tarrasch Variation, Open System, Main Line: 25
 French Defense: Tarrasch Variation, Open System, Süchting Line: 1
 French Defense: Tarrasch Variation, Pawn Center Variation: 4
 French Defense: Two Knights Variation: 1
 French Defense: Winawer Variation: 6
 French Defense: Winawer Variation, Advance Variation: 23
 French Defense: Winawer Variation, Advance Variation, Moscow Variation: 1
 French Defense: Winawer Variation, Alekhine Gambit, Kan Variation: 3
 French Defense: Winawer Variation, Alekhine-Maróczy Gambit: 8
 French Defense: Winawer Variation, Bogoljubow Variation: 2
 French Defense: Winawer Variation, Classical Variation: 3
 French Defense: Winawer Variation, Delayed Exchange Variation: 24
 French Defense: Winawer Variation, Eingorn Variation: 3
 French Defense: Winawer Variation, Exchange Variation, Canal Attack: 1
 French Defense: Winawer Variation, Fingerslip Variation, Kunin Double Gambit: 2
 French Defense: Winawer Variation, Fingerslip Variation, Main Line: 1
 French Defense: Winawer Variation, Petrosian Variation: 4
 French Defense: Winawer Variation, Poisoned Pawn Variation: 1
 French Defense: Winawer Variation, Poisoned Pawn Variation, Main Line: 1
 French Defense: Winawer Variation, Portisch-Hook Variation: 5
 French Defense: Winawer Variation, Positional Variation: 17
 French Defense: Winawer Variation, Retreat Variation, Armenian Line: 3
 French Defense: Winawer Variation, Warsaw Variation: 8
 Grob Opening: Spike, Hurst Attack: 1
 Grünfeld Defense: 15
 Grünfeld Defense: Botvinnik Variation: 3
 Grünfeld Defense: Brinckmann Attack: 18
 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit Accepted: 1
 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Capablanca Variation: 3
 Grünfeld Defense: Brinckmann Attack, Reshevsky Gambit: 2
 Grünfeld Defense: Counterthrust Variation: 2
 Grünfeld Defense: Exchange Variation: 74
 Grünfeld Defense: Exchange Variation, Classical Variation: 15
 Grünfeld Defense: Exchange Variation, Modern Exchange Variation: 85
 Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Kramnik's Line: 3
 Grünfeld Defense: Exchange Variation, Nadanian Attack: 4
 Grünfeld Defense: Exchange Variation, Seville Variation: 1
 Grünfeld Defense: Exchange Variation, Simagin's Improved Variation: 2
 Grünfeld Defense: Exchange Variation, Simagin's Lesser Variation: 2
 Grünfeld Defense: Exchange Variation, Spassky Variation: 5
 Grünfeld Defense: Flohr Variation: 2
 Grünfeld Defense: Makogonov Variation: 1
 Grünfeld Defense: Opocensky Variation: 6
 Grünfeld Defense: Russian Variation: 1
 Grünfeld Defense: Russian Variation, Accelerated Variation: 4
 Grünfeld Defense: Russian Variation, Byrne Variation: 3
 Grünfeld Defense: Russian Variation, Hungarian Variation: 4
 Grünfeld Defense: Russian Variation, Prins Variation: 9
 Grünfeld Defense: Russian Variation, Smyslov Variation: 4
 Grünfeld Defense: Russian Variation, Szabo Variation: 1
 Grünfeld Defense: Smyslov Defense: 17
 Grünfeld Defense: Stockholm Variation: 19
 Grünfeld Defense: Three Knights Variation: 17
 Grünfeld Defense: Three Knights Variation, Burille Variation: 4
 Grünfeld Defense: Three Knights Variation, Burille Variation, Reversed Tarrasch: 11
 Grünfeld Defense: Three Knights Variation, Hungarian Attack: 18
 Grünfeld Defense: Three Knights Variation, Hungarian Variation: 9
 Grünfeld Defense: Three Knights Variation, Petrosian System: 29
 Gunderam Defense: 1
 Horwitz Defense: 30
 Hungarian Opening: 31
 Hungarian Opening: Catalan Formation: 1
 Hungarian Opening: Indian Defense: 9
 Hungarian Opening: Sicilian Invitation: 5
 Hungarian Opening: Slav Formation: 8
 Hungarian Opening: Symmetrical Variation: 20
 Indian Defense: 47
 Indian Defense: Anti-Grünfeld, Alekhine Variation: 4
 Indian Defense: Anti-Nimzo-Indian: 102
 Indian Defense: Budapest Defense: 1
 Indian Defense: Budapest Defense, Adler Variation: 1
 Indian Defense: Budapest Defense, Alekhine Variation: 1
 Indian Defense: Budapest Defense, Rubinstein Variation: 2
 Indian Defense: Dzindzi-Indian Defense: 8
 Indian Defense: King's Indian Variation, Fianchetto Variation: 9
 Indian Defense: Knights Variation: 77
 Indian Defense: Knights Variation, Alburt-Miles Variation: 1
 Indian Defense: London System: 41
 Indian Defense: Normal Variation: 15
 Indian Defense: Omega Gambit: 1
 Indian Defense: Polish Variation: 3
 Indian Defense: Przepiorka Variation: 76
 Indian Defense: Pseudo-Benko: 4
 Indian Defense: Seirawan Attack: 1
 Indian Defense: Spielmann-Indian: 15
 Indian Defense: Tartakower Attack: 6
 Indian Defense: Wade-Tartakower Defense: 26
 Indian Defense: West Indian Defense: 2
 Italian Game: 1
 Italian Game: Classical Variation, Giuoco Pianissimo: 54
 Italian Game: Classical Variation, Giuoco Pianissimo, Albin Variation: 2
 Italian Game: Classical Variation, Giuoco Pianissimo, Main Line: 7
 Italian Game: Classical Variation, Giuoco Pianissimo, with a6: 36
 Italian Game: Classical Variation, Giuoco Pianissimo, with d6: 31
 Italian Game: Classical Variation, Giuoco Pianissimo, with h6: 5
 Italian Game: Classical Variation, Greco Gambit: 3
 Italian Game: Classical Variation, Greco Gambit, Moeller-Therkatz Attack: 1
 Italian Game: Classical Variation, Greco Gambit, Traditional Line: 66
 Italian Game: Evans Gambit Declined: 3
 Italian Game: Evans Gambit, Anderssen Variation, Cordel Line: 1
 Italian Game: Giuoco Pianissimo: 2
 Italian Game: Giuoco Pianissimo, Canal Variation: 8
 Italian Game: Giuoco Pianissimo, Italian Four Knights Variation: 14
 Italian Game: Giuoco Pianissimo, Normal: 19
 Italian Game: Giuoco Piano: 14
 Italian Game: Hungarian Defense: 3
 Italian Game: Paris Defense: 2
 Italian Game: Scotch Gambit, Anderssen Attack: 5
 Italian Game: Scotch Gambit, Anderssen Attack, Main Line: 2
 Italian Game: Scotch Gambit, Double Gambit Accepted: 1
 Italian Game: Scotch Gambit, Max Lange Attack: 2
 Italian Game: Two Knights Defense: 2
 Italian Game: Two Knights Defense, Modern Bishop's Opening: 53
 Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line: 3
 Italian Game: Two Knights Defense, Polerio Defense, Suhle Defense: 1
 Italian Game: Two Knights Defense, Steinitz Variation: 2
 Kangaroo Defense: 33
 Kangaroo Defense: Keres Defense, Transpositional Variation: 2
 King's Gambit Accepted: Bishop's Gambit, Bogoljubow Defense: 1
 King's Gambit Accepted: Bishop's Gambit, Cozio Defense: 1
 King's Gambit Accepted: Bonsch-Osmolovsky Variation: 1
 King's Gambit Accepted: Mason-Keres Gambit: 1
 King's Gambit Declined: Classical Variation: 1
 King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Morphy Defense: 1
 King's Indian Attack: 205
 King's Indian Attack: Double Fianchetto: 34
 King's Indian Attack: French Variation: 7
 King's Indian Attack: Keres Variation: 50
 King's Indian Attack: Pachman System: 7
 King's Indian Attack: Sicilian Variation: 10
 King's Indian Attack: Spassky Variation: 23
 King's Indian Attack: Symmetrical Defense: 109
 King's Indian Attack: Wahls Defense: 7
 King's Indian Attack: Yugoslav Variation: 75
 King's Indian Defense: 16
 King's Indian Defense: Accelerated Averbakh Variation: 4
 King's Indian Defense: Averbakh Variation: 1
 King's Indian Defense: Averbakh Variation, Benoni Defense, Advance Variation: 4
 King's Indian Defense: Averbakh Variation, Benoni Defense, Exchange Variation: 2
 King's Indian Defense: Averbakh Variation, Flexible Defense: 2
 King's Indian Defense: Averbakh Variation, Main Line: 1
 King's Indian Defense: Averbakh Variation, Modern Defense: 10
 King's Indian Defense: Exchange Variation: 89
 King's Indian Defense: Fianchetto Variation, Benjamin Defense: 11
 King's Indian Defense: Fianchetto Variation, Carlsbad Variation: 5
 King's Indian Defense: Fianchetto Variation, Classical Fianchetto: 13
 King's Indian Defense: Fianchetto Variation, Classical Main Line: 10
 King's Indian Defense: Fianchetto Variation, Classical Variation: 21
 King's Indian Defense: Fianchetto Variation, Debrecen Defense: 2
 King's Indian Defense: Fianchetto Variation, Double Fianchetto Attack: 3
 King's Indian Defense: Fianchetto Variation, Hungarian Variation: 2
 King's Indian Defense: Fianchetto Variation, Immediate Fianchetto: 55
 King's Indian Defense: Fianchetto Variation, Kavalek Defense: 24
 King's Indian Defense: Fianchetto Variation, Larsen Defense: 17
 King's Indian Defense: Fianchetto Variation, Lesser Simagin (Spassky): 14
 King's Indian Defense: Fianchetto Variation, Long Variation: 2
 King's Indian Defense: Fianchetto Variation, Panno Variation: 46
 King's Indian Defense: Fianchetto Variation, Panno Variation, Blockade Line: 1
 King's Indian Defense: Fianchetto Variation, Panno Variation, Korchnoi Line: 1
 King's Indian Defense: Fianchetto Variation, Pterodactyl Variation: 4
 King's Indian Defense: Fianchetto Variation, Simagin Variation: 3
 King's Indian Defense: Fianchetto Variation, Uhlmann-Szabo System: 11
 King's Indian Defense: Fianchetto Variation, Yugoslav System: 1
 King's Indian Defense: Fianchetto Variation, Yugoslav Variation: 3
 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line: 3
 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line: 13
 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Rare Line: 1
 King's Indian Defense: Four Pawns Attack: 6
 King's Indian Defense: Four Pawns Attack, Dynamic Attack: 1
 King's Indian Defense: Four Pawns Attack, Normal Attack: 3
 King's Indian Defense: Kazakh Variation: 3
 King's Indian Defense: Kramer Variation: 2
 King's Indian Defense: Larsen Variation: 3
 King's Indian Defense: Makogonov Variation: 15
 King's Indian Defense: Normal Variation: 24
 King's Indian Defense: Normal Variation, King's Knight Variation: 144
 King's Indian Defense: Normal Variation, Rare Defenses: 18
 King's Indian Defense: Normal Variation, Standard Development: 2
 King's Indian Defense: Orthodox Variation: 64
 King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense: 19
 King's Indian Defense: Orthodox Variation, Bayonet Attack: 8
 King's Indian Defense: Orthodox Variation, Bayonet Attack, Sokolov's Line: 8
 King's Indian Defense: Orthodox Variation, Classical System: 11
 King's Indian Defense: Orthodox Variation, Classical System, Benko Attack: 1
 King's Indian Defense: Orthodox Variation, Classical System, Neo-Classical Line: 1
 King's Indian Defense: Orthodox Variation, Donner Defense: 11
 King's Indian Defense: Orthodox Variation, Glek Defense: 21
 King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System: 24
 King's Indian Defense: Orthodox Variation, Modern System: 8
 King's Indian Defense: Orthodox Variation, Positional Defense: 13
 King's Indian Defense: Orthodox Variation, Positional Defense, Closed Line: 1
 King's Indian Defense: Orthodox Variation, Positional Defense, Main Line: 3
 King's Indian Defense: Petrosian Variation: 5
 King's Indian Defense: Petrosian Variation, Stein Defense: 12
 King's Indian Defense: Santasiere Variation: 1
 King's Indian Defense: Semi-Averbakh System: 6
 King's Indian Defense: Semi-Classical Variation: 2
 King's Indian Defense: Smyslov Variation: 3
 King's Indian Defense: Steiner Attack: 7
 King's Indian Defense: Sämisch Variation: 12
 King's Indian Defense: Sämisch Variation, Bobotsov-Korchnoi-Petrosian Variation: 8
 King's Indian Defense: Sämisch Variation, Byrne Defense: 1
 King's Indian Defense: Sämisch Variation, Closed Variation: 7
 King's Indian Defense: Sämisch Variation, Normal Defense: 6
 King's Indian Defense: Sämisch Variation, Panno Formation: 3
 King's Indian Defense: Sämisch Variation, Panno Main Line: 6
 King's Indian Defense: Sämisch Variation, Sämisch Gambit: 6
 King's Indian Defense: Sämisch Variation, Yates Defense: 3
 King's Knight Opening: 2
 King's Knight Opening: Konstantinopolsky: 1
 King's Knight Opening: Normal Variation: 10
 King's Pawn Game: 55
 King's Pawn Game: Alapin Opening: 1
 King's Pawn Game: King's Head Opening: 1
 King's Pawn Game: Maróczy Defense: 2
 King's Pawn Game: Tayler Opening, Inverted Hanham: 1
 Lasker Simul Special: 1
 Lemming Defense: 1
 Lion Defense: Anti-Philidor, Lion's Cave: 1
 Lion Defense: Lion's Jaw: 19
 London System: 30
 London System: Poisoned Pawn Variation: 1
 Marienbad System: 3
 Marienbad System: Berg Variation: 1
 Mexican Defense: 5
 Mieses Opening: 5
 Mikenas Defense: 4
 Modern Defense: 24
 Modern Defense: Averbakh System: 7
 Modern Defense: Beefeater Variation: 1
 Modern Defense: Geller's System: 20
 Modern Defense: Kotov Variation: 5
 Modern Defense: Lizard Defense, Mittenberger Gambit: 2
 Modern Defense: Pseudo-Austrian Attack: 2
 Modern Defense: Semi-Averbakh Variation, Polish Variation: 3
 Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation: 2
 Modern Defense: Standard Defense: 26
 Modern Defense: Standard Line: 9
 Modern Defense: Three Pawns Attack: 2
 Modern Defense: Two Knights Variation: 7
 Modern Defense: Two Knights Variation, Suttles Variation: 8
 Neo-Grünfeld Defense: Classical Variation: 5
 Neo-Grünfeld Defense: Classical Variation, Modern Defense: 36
 Neo-Grünfeld Defense: Classical Variation, Original Defense: 59
 Neo-Grünfeld Defense: Classical Variation, Polgar Variation: 1
 Neo-Grünfeld Defense: Delayed Exchange Variation: 18
 Neo-Grünfeld Defense: Exchange Variation: 8
 Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation: 132
 Neo-Grünfeld Defense: with g3: 1
 Nimzo-Indian Defense: 10
 Nimzo-Indian Defense: Classical Variation: 98
 Nimzo-Indian Defense: Classical Variation, Belyavsky Gambit: 1
 Nimzo-Indian Defense: Classical Variation, Berlin Variation: 27
 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System: 8
 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation: 28
 Nimzo-Indian Defense: Classical Variation, Keres Defense: 51
 Nimzo-Indian Defense: Classical Variation, Milner-Barry Variation: 6
 Nimzo-Indian Defense: Classical Variation, Noa Variation: 77
 Nimzo-Indian Defense: Classical Variation, Vitolins-Adorjan Gambit: 5
 Nimzo-Indian Defense: Classical Variation, Zurich Variation: 2
 Nimzo-Indian Defense: Fischer Variation: 10
 Nimzo-Indian Defense: Hübner Variation: 14
 Nimzo-Indian Defense: Hübner Variation, Main Line: 6
 Nimzo-Indian Defense: Hübner Variation, Rubinstein Variation: 18
 Nimzo-Indian Defense: Hübner Variation, Rubinstein Variation, Main Line: 10
 Nimzo-Indian Defense: Kmoch Variation: 12
 Nimzo-Indian Defense: Leningrad Variation: 5
 Nimzo-Indian Defense: Leningrad Variation, Benoni Defense: 4
 Nimzo-Indian Defense: Normal Line: 8
 Nimzo-Indian Defense: Normal Variation: 5
 Nimzo-Indian Defense: Normal Variation, Bernstein Defense: 6
 Nimzo-Indian Defense: Normal Variation, Bernstein Defense, Exchange Line: 13
 Nimzo-Indian Defense: Normal Variation, Bishop Attack: 14
 Nimzo-Indian Defense: Normal Variation, Bishop Attack, Classical Defense: 16
 Nimzo-Indian Defense: Normal Variation, Botvinnik System: 6
 Nimzo-Indian Defense: Normal Variation, Bronstein (Byrne) Variation: 1
 Nimzo-Indian Defense: Normal Variation, Gligoric System: 20
 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense: 3
 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bronstein Variation: 17
 Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation: 11
 Nimzo-Indian Defense: Normal Variation, Gligoric System, Keres Variation: 1
 Nimzo-Indian Defense: Normal Variation, Hübner Deferred: 2
 Nimzo-Indian Defense: Normal Variation, Ragozin Variation: 10
 Nimzo-Indian Defense: Normal Variation, Schlechter Defense: 12
 Nimzo-Indian Defense: Normal Variation, Taimanov Variation: 1
 Nimzo-Indian Defense: Reshevsky Variation: 24
 Nimzo-Indian Defense: Romanishin Variation: 18
 Nimzo-Indian Defense: Romanishin Variation, English Hybrid: 11
 Nimzo-Indian Defense: Simagin Variation: 15
 Nimzo-Indian Defense: Spielmann Variation: 2
 Nimzo-Indian Defense: Spielmann Variation, Romanovsky Gambit: 1
 Nimzo-Indian Defense: St. Petersburg Variation: 14
 Nimzo-Indian Defense: St. Petersburg Variation, with Ne4: 6
 Nimzo-Indian Defense: Sämisch Variation: 9
 Nimzo-Indian Defense: Sämisch Variation, Capablanca Variation: 2
 Nimzo-Indian Defense: Sämisch Variation, Keres Variation: 5
 Nimzo-Indian Defense: Three Knights Variation: 29
 Nimzo-Indian Defense: Three Knights Variation, Duchamp Variation: 33
 Nimzo-Indian Defense: Three Knights Variation, Duchamp Variation, Modern Line: 5
 Nimzo-Larsen Attack: 4
 Nimzo-Larsen Attack: Classical Variation: 28
 Nimzo-Larsen Attack: English Variation: 3
 Nimzo-Larsen Attack: Indian Variation: 8
 Nimzo-Larsen Attack: Modern Variation: 13
 Nimzo-Larsen Attack: Spike Variation: 1
 Nimzo-Larsen Attack: Symmetrical Variation: 6
 Nimzowitsch Defense: Declined Variation: 2
 Nimzowitsch Defense: Mikenas Variation: 1
 Nimzowitsch Defense: Williams Variation: 8
 Old Indian Defense: 9
 Old Indian Defense: Czech Variation, with Nf3: 6
 Old Indian Defense: Janowski Variation: 3
 Old Indian Defense: Janowski Variation, Main Line: 10
 Old Indian Defense: Normal Variation: 9
 Old Indian Defense: Tartakower-Indian: 1
 Old Indian Defense: Two Knights Variation: 5
 Old Indian Defense: Ukrainian Variation: 5
 Owen Defense: 4
 Paleface Attack: 1
 Petrov's Defense: 7
 Petrov's Defense: Classical Attack: 18
 Petrov's Defense: Classical Attack, Berger Variation: 3
 Petrov's Defense: Classical Attack, Chigorin Variation: 11
 Petrov's Defense: Classical Attack, Chigorin Variation, Browne Attack: 2
 Petrov's Defense: Classical Attack, Chigorin Variation, Main Line: 14
 Petrov's Defense: Classical Attack, Jaenisch Variation: 10
 Petrov's Defense: Classical Attack, Marshall Variation: 7
 Petrov's Defense: Classical Attack, Mason Variation: 4
 Petrov's Defense: Classical Attack, Mason-Showalter Variation: 6
 Petrov's Defense: Classical Attack, Staunton Variation: 14
 Petrov's Defense: Cozio Attack: 186
 Petrov's Defense: Damiano Variation: 1
 Petrov's Defense: French Attack: 23
 Petrov's Defense: Karklins-Martinovsky Variation: 9
 Petrov's Defense: Kaufmann Attack: 9
 Petrov's Defense: Millennium Attack: 13
 Petrov's Defense: Modern Attack: 9
 Petrov's Defense: Modern Attack, Center Attack: 8
 Petrov's Defense: Modern Attack, Center Variation: 51
 Petrov's Defense: Modern Attack, Murrey Variation: 7
 Petrov's Defense: Nimzowitsch Attack: 51
 Petrov's Defense: Paulsen Attack: 9
 Petrov's Defense: Three Knights Game: 7
 Philidor Defense: 5
 Philidor Defense: Exchange Variation: 29
 Philidor Defense: Lion Variation: 44
 Philidor Defense: Lion Variation, Forcing Line: 1
 Philidor Defense: Lion Variation, Lion's Claw, with Be2 and c6: 1
 Philidor Defense: Lion Variation, Shirov Gambit: 1
 Philidor Defense: Lion Variation, Sozin Variation: 1
 Philidor Defense: Nimzowitsch Variation, Rellstab Variation: 1
 Pirc Defense: 109
 Pirc Defense: 150 Attack: 3
 Pirc Defense: 150 Attack, Sveshnikov-Jansa Attack: 3
 Pirc Defense: Austrian Attack: 2
 Pirc Defense: Austrian Attack, Dragon Formation: 42
 Pirc Defense: Austrian Attack, Kurajica Variation: 3
 Pirc Defense: Austrian Attack, Unzicker Attack: 2
 Pirc Defense: Austrian Attack, Unzicker Attack, Bronstein Variation: 1
 Pirc Defense: Austrian Attack, Weiss Variation: 9
 Pirc Defense: Bayonet Attack: 1
 Pirc Defense: Byrne Variation: 6
 Pirc Defense: Classical Variation: 5
 Pirc Defense: Classical Variation, Quiet System: 20
 Pirc Defense: Classical Variation, Quiet System, Chigorin Line: 12
 Pirc Defense: Classical Variation, Quiet System, Czech Defense: 17
 Pirc Defense: Classical Variation, Quiet System, Parma Defense: 38
 Pirc Defense: Classical Variation, Schlechter Variation: 7
 Pirc Defense: Sveshnikov System: 8
 Polish Opening: 5
 Polish Opening: King's Indian Variation: 1
 Polish Opening: King's Indian Variation, Sokolsky Attack: 1
 Polish Opening: Outflank Variation: 1
 Polish Opening: Schiffler-Sokolsky Variation: 1
 Polish Opening: Zukertort System: 1
 Ponziani Opening: Caro Gambit: 1
 Ponziani Opening: Jaenisch Counterattack: 7
 Pseudo Queen's Indian Defense: 13
 Pterodactyl Defense: 3
 Pterodactyl Defense: Eastern, Benoni: 1
 Pterodactyl Defense: Queen Pterodactyl, Quiet Line: 1
 Queen's Gambit: 3
 Queen's Gambit Accepted: 3
 Queen's Gambit Accepted: Alekhine Defense: 4
 Queen's Gambit Accepted: Alekhine Defense, Borisenko-Furman Variation: 1
 Queen's Gambit Accepted: Alekhine Defense, Haberditz Variation: 13
 Queen's Gambit Accepted: Bogoljubow Defense: 3
 Queen's Gambit Accepted: Central Variation, Alekhine System: 135
 Queen's Gambit Accepted: Central Variation, McDonnell Defense: 31
 Queen's Gambit Accepted: Central Variation, Modern Defense: 5
 Queen's Gambit Accepted: Central Variation, Rubinstein Defense: 8
 Queen's Gambit Accepted: Classical Defense: 22
 Queen's Gambit Accepted: Classical Defense, Alekhine System: 9
 Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line: 7
 Queen's Gambit Accepted: Classical Defense, Alekhine System, Smyslov Variation: 4
 Queen's Gambit Accepted: Classical Defense, Main Line: 144
 Queen's Gambit Accepted: Classical Defense, Normal Line: 4
 Queen's Gambit Accepted: Classical Defense, Rubinstein Variation: 46
 Queen's Gambit Accepted: Classical Defense, Russian Gambit: 4
 Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Development Variation: 16
 Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Exchange Variation: 5
 Queen's Gambit Accepted: Furman Variation: 57
 Queen's Gambit Accepted: Gunsberg Defense: 11
 Queen's Gambit Accepted: Janowski-Larsen Variation: 25
 Queen's Gambit Accepted: Linares Variation: 2
 Queen's Gambit Accepted: Mannheim Variation: 10
 Queen's Gambit Accepted: Normal Variation: 11
 Queen's Gambit Accepted: Normal Variation, Traditional System: 9
 Queen's Gambit Accepted: Old Variation: 33
 Queen's Gambit Accepted: Rosenthal Variation: 7
 Queen's Gambit Accepted: Showalter Variation: 2
 Queen's Gambit Accepted: Smyslov Variation: 1
 Queen's Gambit Accepted: Winawer Defense: 5
 Queen's Gambit Declined: 107
 Queen's Gambit Declined: Albin Countergambit: 1
 Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation: 1
 Queen's Gambit Declined: Albin Countergambit, Modern Line: 1
 Queen's Gambit Declined: Anti-Tartakower Variation: 17
 Queen's Gambit Declined: Anti-Tartakower Variation, Petrosian Variation: 42
 Queen's Gambit Declined: Austrian Defense: 1
 Queen's Gambit Declined: Austrian Defense, Gusev Countergambit: 1
 Queen's Gambit Declined: Baltic Defense: 4
 Queen's Gambit Declined: Baltic Defense, Argentinian Gambit: 1
 Queen's Gambit Declined: Baltic Defense, Pseudo-Chigorin: 6
 Queen's Gambit Declined: Baltic Defense, Pseudo-Slav: 6
 Queen's Gambit Declined: Barmen Variation: 56
 Queen's Gambit Declined: Cambridge Springs Defense: 3
 Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation: 11
 Queen's Gambit Declined: Cambridge Springs Defense, Capablanca Variation: 2
 Queen's Gambit Declined: Cambridge Springs Defense, Rubinstein Variation: 3
 Queen's Gambit Declined: Cambridge Springs Defense, Yugoslav Variation: 4
 Queen's Gambit Declined: Capablanca Variation: 12
 Queen's Gambit Declined: Charousek Variation: 63
 Queen's Gambit Declined: Chigorin Defense: 3
 Queen's Gambit Declined: Chigorin Defense, Exchange Variation: 5
 Queen's Gambit Declined: Chigorin Defense, Exchange Variation, Costa's Line: 4
 Queen's Gambit Declined: Chigorin Defense, Main Line: 8
 Queen's Gambit Declined: Chigorin Defense, Modern Gambit: 2
 Queen's Gambit Declined: Exchange Variation: 13
 Queen's Gambit Declined: Exchange Variation, Positional Variation: 79
 Queen's Gambit Declined: Exchange Variation, Reshevsky Variation: 5
 Queen's Gambit Declined: Exchange Variation, Sämisch Variation: 13
 Queen's Gambit Declined: Harrwitz Attack: 39
 Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense: 10
 Queen's Gambit Declined: Harrwitz Attack, Main Line: 40
 Queen's Gambit Declined: Harrwitz Attack, Orthodox Defense: 2
 Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense: 31
 Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line: 19
 Queen's Gambit Declined: Hastings Variation: 3
 Queen's Gambit Declined: Janowski Variation: 9
 Queen's Gambit Declined: Knight Defense, Alekhine Gambit: 1
 Queen's Gambit Declined: Lasker Defense: 43
 Queen's Gambit Declined: Lasker Defense, Bernstein Variation, Mar del Plata Gambit: 1
 Queen's Gambit Declined: Lasker Defense, Main Line: 2
 Queen's Gambit Declined: Lasker Defense, Teichmann Variation: 18
 Queen's Gambit Declined: Manhattan Variation: 1
 Queen's Gambit Declined: Miles Variation: 6
 Queen's Gambit Declined: Modern Variation: 2
 Queen's Gambit Declined: Modern Variation, Knight Defense: 4
 Queen's Gambit Declined: Modern Variation, Normal Line: 10
 Queen's Gambit Declined: Neo-Orthodox Variation: 1
 Queen's Gambit Declined: Neo-Orthodox Variation, Main Line: 21
 Queen's Gambit Declined: Normal Defense: 2
 Queen's Gambit Declined: Orthodox Defense: 6
 Queen's Gambit Declined: Orthodox Defense, Alekhine Variation: 3
 Queen's Gambit Declined: Orthodox Defense, Bd3 Line: 4
 Queen's Gambit Declined: Orthodox Defense, Botvinnik Variation: 6
 Queen's Gambit Declined: Orthodox Defense, Capablanca System: 1
 Queen's Gambit Declined: Orthodox Defense, Classical Variation: 10
 Queen's Gambit Declined: Orthodox Defense, Henneberger Variation: 1
 Queen's Gambit Declined: Orthodox Defense, Main Line: 14
 Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack: 2
 Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation: 11
 Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation, Flohr Line: 7
 Queen's Gambit Declined: Orthodox Defense, Swiss, Carlsbad Variation: 6
 Queen's Gambit Declined: Pseudo-Tarrasch Variation: 1
 Queen's Gambit Declined: Queen's Knight Variation: 25
 Queen's Gambit Declined: Ragozin Defense: 146
 Queen's Gambit Declined: Ragozin Defense, Alekhine Variation: 22
 Queen's Gambit Declined: Ragozin Defense, Vienna Variation: 12
 Queen's Gambit Declined: Semi-Slav, Abrahams Variation: 1
 Queen's Gambit Declined: Semi-Tarrasch Defense: 31
 Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation: 28
 Queen's Gambit Declined: Semi-Tarrasch Defense, Kmoch Variation: 1
 Queen's Gambit Declined: Semi-Tarrasch Defense, Main Line: 11
 Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation: 3
 Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch: 4
 Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch Bishop Attack: 2
 Queen's Gambit Declined: Tartakower Defense: 128
 Queen's Gambit Declined: Tartakower Defense, Makogonov Exchange Variation: 24
 Queen's Gambit Declined: Three Knights Variation: 100
 Queen's Gambit Declined: Three Knights, Vienna Variation: 36
 Queen's Gambit Declined: Traditional Variation: 13
 Queen's Gambit Declined: Uhlmann Variation: 6
 Queen's Gambit Declined: Vienna Variation: 3
 Queen's Gambit Declined: Vienna Variation, Quiet Variation: 62
 Queen's Gambit Declined: Westphalian Variation: 3
 Queen's Indian Accelerated: 5
 Queen's Indian Defense: 4
 Queen's Indian Defense: Anti-Queen's Indian System: 13
 Queen's Indian Defense: Capablanca Variation: 28
 Queen's Indian Defense: Classical Variation: 9
 Queen's Indian Defense: Classical Variation, Polugaevsky Gambit: 5
 Queen's Indian Defense: Classical Variation, Tiviakov Defense: 3
 Queen's Indian Defense: Classical Variation, Traditional Variation: 252
 Queen's Indian Defense: Classical Variation, Traditional Variation, Main Line: 47
 Queen's Indian Defense: Classical Variation, Traditional Variation, Nimzowitsch Line: 1
 Queen's Indian Defense: Euwe Variation: 7
 Queen's Indian Defense: Fianchetto Variation: 40
 Queen's Indian Defense: Fianchetto Variation, Check Variation: 12
 Queen's Indian Defense: Fianchetto Variation, Check Variation, Intermezzo Line: 150
 Queen's Indian Defense: Fianchetto Variation, Kramnik Variation: 17
 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation: 37
 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Nimzowitsch Attack: 33
 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Quiet Line: 74
 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Timman's Line: 12
 Queen's Indian Defense: Fianchetto Variation, Rubinstein Variation: 2
 Queen's Indian Defense: Fianchetto Variation, Traditional Line: 8
 Queen's Indian Defense: Kasparov Variation: 32
 Queen's Indian Defense: Kasparov Variation, Botvinnik Attack: 2
 Queen's Indian Defense: Kasparov-Petrosian Variation: 1
 Queen's Indian Defense: Kasparov-Petrosian Variation, Andersson Variation: 2
 Queen's Indian Defense: Kasparov-Petrosian Variation, Classical Variation: 14
 Queen's Indian Defense: Kasparov-Petrosian Variation, Hedgehog Variation: 6
 Queen's Indian Defense: Kasparov-Petrosian Variation, Kasparov Attack: 23
 Queen's Indian Defense: Kasparov-Petrosian Variation, Main Line: 43
 Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack: 19
 Queen's Indian Defense: Kasparov-Petrosian Variation, Romanishin Attack: 8
 Queen's Indian Defense: Miles Variation: 6
 Queen's Indian Defense: Opocensky Variation: 24
 Queen's Indian Defense: Petrosian Variation: 21
 Queen's Indian Defense: Petrosian Variation, Farago Defense: 13
 Queen's Indian Defense: Riumin Variation: 17
 Queen's Indian Defense: Spassky System: 54
 Queen's Indian Defense: Traditional Variation: 3
 Queen's Indian Defense: Yates Variation: 23
 Queen's Pawn Game: 65
 Queen's Pawn Game: Accelerated London System: 31
 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit: 11
 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit: 1
 Queen's Pawn Game: Anti-Torre: 1
 Queen's Pawn Game: Barry Attack: 7
 Queen's Pawn Game: Barry Attack, Grünfeld Variation: 7
 Queen's Pawn Game: Barry Attack, Tarzan Attack: 3
 Queen's Pawn Game: Chigorin Variation: 8
 Queen's Pawn Game: Chigorin Variation, Alburt Defense: 2
 Queen's Pawn Game: Colle System: 21
 Queen's Pawn Game: Colle System, Anti-Colle: 3
 Queen's Pawn Game: Colle System, Grünfeld Formation: 2
 Queen's Pawn Game: Krause Variation: 7
 Queen's Pawn Game: Levitsky Attack: 21
 Queen's Pawn Game: Levitsky Attack, Euwe Variation, Modern Line: 4
 Queen's Pawn Game: London System: 76
 Queen's Pawn Game: London System, with e6: 4
 Queen's Pawn Game: Modern Defense: 30
 Queen's Pawn Game: Symmetrical Variation: 106
 Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan: 13
 Queen's Pawn Game: Torre Attack: 8
 Queen's Pawn Game: Torre Attack, Breyer Variation: 1
 Queen's Pawn Game: Torre Attack, Gossip Variation: 13
 Queen's Pawn Game: Torre Attack, Grünfeld Variation, Main Line: 17
 Queen's Pawn Game: Veresov Attack, Dutch System: 2
 Queen's Pawn Game: Zukertort Variation: 54
 Rapport-Jobava System: 10
 Rat Defense: Accelerated Gurgenidze: 3
 Rat Defense: English Rat: 17
 Rat Defense: Fuller Gambit: 1
 Rat Defense: Harmonist: 3
 Richter-Veresov Attack: 6
 Richter-Veresov Attack: Two Knights System: 1
 Robatsch Defense: 1
 Rubinstein Opening: 2
 Rubinstein Opening: Bogoljubow Defense: 4
 Rubinstein Opening: Classical Defense: 1
 Ruy Lopez: 5
 Ruy Lopez: Alapin Defense: 1
 Ruy Lopez: Berlin Defense: 100
 Ruy Lopez: Berlin Defense, Berlin Wall: 6
 Ruy Lopez: Berlin Defense, Beverwijk Variation: 7
 Ruy Lopez: Berlin Defense, Closed Wolf Variation: 2
 Ruy Lopez: Berlin Defense, Cordel Variation: 1
 Ruy Lopez: Berlin Defense, Hedgehog Variation: 1
 Ruy Lopez: Berlin Defense, Kaufmann Variation: 1
 Ruy Lopez: Berlin Defense, Minckwitz Variation: 3
 Ruy Lopez: Berlin Defense, Nyholm Attack: 2
 Ruy Lopez: Berlin Defense, Rio Gambit Accepted: 213
 Ruy Lopez: Berlin Defense, Rio de Janeiro Variation: 5
 Ruy Lopez: Berlin Defense, Trifunovic Variation: 1
 Ruy Lopez: Berlin Defense, l'Hermet Variation: 4
 Ruy Lopez: Berlin Defense, l'Hermet Variation, Berlin Wall Defense: 67
 Ruy Lopez: Bird Variation: 12
 Ruy Lopez: Classical Variation: 8
 Ruy Lopez: Classical Variation, Central Variation: 1
 Ruy Lopez: Classical Variation, Charousek Variation: 1
 Ruy Lopez: Classical Variation, Cordel Gambit: 1
 Ruy Lopez: Classical Variation, Modern Main Line: 2
 Ruy Lopez: Closed: 91
 Ruy Lopez: Closed, Anti-Marshall: 19
 Ruy Lopez: Closed, Averbakh Variation: 6
 Ruy Lopez: Closed, Balla Variation: 1
 Ruy Lopez: Closed, Bogoljubow Variation: 22
 Ruy Lopez: Closed, Breyer: 1
 Ruy Lopez: Closed, Breyer Defense: 1
 Ruy Lopez: Closed, Breyer Defense, Quiet Variation: 4
 Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid: 36
 Ruy Lopez: Closed, Center Attack: 3
 Ruy Lopez: Closed, Chigorin Defense: 50
 Ruy Lopez: Closed, Chigorin Defense, Gajewski Gambit: 2
 Ruy Lopez: Closed, Chigorin Defense, Panov System: 16
 Ruy Lopez: Closed, Delayed Exchange: 37
 Ruy Lopez: Closed, Flohr System: 300
 Ruy Lopez: Closed, Karpov Variation: 4
 Ruy Lopez: Closed, Keres Defense: 6
 Ruy Lopez: Closed, Kholmov Variation: 7
 Ruy Lopez: Closed, Martinez Variation: 25
 Ruy Lopez: Closed, Pilnik Variation: 15
 Ruy Lopez: Closed, Smyslov Defense: 3
 Ruy Lopez: Closed, Trajkovic Counterattack: 1
 Ruy Lopez: Closed, Worrall Attack, Castling Line: 5
 Ruy Lopez: Closed, Worrall Attack, Delayed Castling Line: 2
 Ruy Lopez: Closed, Yates Variation: 2
 Ruy Lopez: Closed, Yates Variation, Short Attack: 1
 Ruy Lopez: Closed, Zaitsev System: 55
 Ruy Lopez: Cozio Defense: 5
 Ruy Lopez: Cozio Defense, Paulsen Variation: 1
 Ruy Lopez: Exchange Variation: 9
 Ruy Lopez: Exchange Variation, Alapin Gambit: 82
 Ruy Lopez: Exchange Variation, Alekhine Variation: 3
 Ruy Lopez: Exchange Variation, Bronstein Variation: 6
 Ruy Lopez: Exchange Variation, Gligoric Variation: 42
 Ruy Lopez: Exchange Variation, Keres Variation: 16
 Ruy Lopez: Exchange Variation, King's Bishop Variation: 12
 Ruy Lopez: Exchange Variation, Normal Variation: 29
 Ruy Lopez: Exchange, Alekhine Variation: 9
 Ruy Lopez: Fianchetto Defense: 13
 Ruy Lopez: Marshall Attack: 4
 Ruy Lopez: Marshall Attack, Main Line: 2
 Ruy Lopez: Marshall Attack, Modern Main Line: 2
 Ruy Lopez: Marshall Attack, Modern Variation: 2
 Ruy Lopez: Morphy Defense: 31
 Ruy Lopez: Morphy Defense, Anderssen Variation: 34
 Ruy Lopez: Morphy Defense, Arkhangelsk Variation: 16
 Ruy Lopez: Morphy Defense, Bayreuth Variation: 2
 Ruy Lopez: Morphy Defense, Caro Variation: 1
 Ruy Lopez: Morphy Defense, Classical Defense Deferred: 2
 Ruy Lopez: Morphy Defense, Cozio Defense: 10
 Ruy Lopez: Morphy Defense, Duras Variation: 4
 Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred: 1
 Ruy Lopez: Morphy Defense, Mackenzie Variation: 3
 Ruy Lopez: Morphy Defense, Modern Steinitz Defense: 28
 Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Fianchetto Variation: 13
 Ruy Lopez: Morphy Defense, Neo-Arkhangelsk Variation: 13
 Ruy Lopez: Morphy Defense, Schliemann Defense Deferred: 1
 Ruy Lopez: Morphy Defense, Steinitz Deferred: 2
 Ruy Lopez: Morphy Defense, Tarrasch Variation: 11
 Ruy Lopez: Morphy Defense, Wormald Attack: 7
 Ruy Lopez: Open: 5
 Ruy Lopez: Open Berlin Defense, Showalter Variation: 2
 Ruy Lopez: Open Berlin Defense, l'Hermet Variation: 294
 Ruy Lopez: Open, Bernstein Variation: 5
 Ruy Lopez: Open, Classical Defense: 2
 Ruy Lopez: Open, Dilworth Variation: 1
 Ruy Lopez: Open, Howell Attack: 3
 Ruy Lopez: Open, Main Line: 6
 Ruy Lopez: Open, Motzko Attack, Nenarokov Variation: 1
 Ruy Lopez: Open, Riga Variation: 1
 Ruy Lopez: Schliemann Defense: 6
 Ruy Lopez: Schliemann Defense, Classical Variation: 1
 Ruy Lopez: Schliemann Defense, Dyckhoff Variation: 3
 Ruy Lopez: Schliemann Defense, Tartakower Variation: 4
 Ruy Lopez: Steinitz Defense: 5
 Réti Opening: 23
 Réti Opening: Advance Variation: 18
 Réti Opening: Anglo-Slav Variation, Bled Variation: 1
 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation: 4
 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation, Stonewall Line: 5
 Réti Opening: Anglo-Slav Variation, Capablanca Variation: 2
 Réti Opening: Anglo-Slav Variation, London Defensive System: 3
 Réti Opening: Anglo-Slav Variation, New York System: 2
 Réti Opening: Anglo-Slav Variation, Torre System: 1
 Réti Opening: Réti Accepted: 6
 Réti Opening: Réti Gambit, Keres Variation: 1
 Saragossa Opening: 3
 Scandinavian Defense: 3
 Scandinavian Defense: Bronstein Variation: 5
 Scandinavian Defense: Classical Variation: 7
 Scandinavian Defense: Gubinsky-Melts Defense: 26
 Scandinavian Defense: Icelandic-Palme Gambit: 1
 Scandinavian Defense: Lasker Variation: 1
 Scandinavian Defense: Main Line: 15
 Scandinavian Defense: Main Line, Mieses Variation: 17
 Scandinavian Defense: Marshall Variation: 2
 Scandinavian Defense: Mieses-Kotroc Variation: 11
 Scandinavian Defense: Modern Variation: 4
 Scandinavian Defense: Panov Transfer: 5
 Scandinavian Defense: Portuguese Gambit, Banker Variation: 1
 Scandinavian Defense: Portuguese Gambit, Wuss Variation: 1
 Scandinavian Defense: Richter Variation: 1
 Scandinavian Defense: Schiller-Pytel Variation: 5
 Scandinavian Defense: Valencian Variation: 3
 Scandinavian Defense: Valencian Variation, Ilundain Variation: 1
 Scandinavian Defense: Valencian Variation, Main Line: 1
 Scotch Game: 6
 Scotch Game: Benima Defense: 1
 Scotch Game: Classical Variation: 33
 Scotch Game: Classical Variation, Intermezzo Variation: 37
 Scotch Game: Classical Variation, Millennium Variation: 2
 Scotch Game: Cochrane-Shumov Defense: 1
 Scotch Game: Malaniuk Variation: 10
 Scotch Game: Meitner Variation: 1
 Scotch Game: Mieses Variation: 23
 Scotch Game: Potter Variation: 9
 Scotch Game: Romanishin Variation: 3
 Scotch Game: Schmidt Variation: 33
 Scotch Game: Scotch Gambit, Advance Variation: 1
 Scotch Game: Scotch Gambit, Göring Gambit Declined: 1
 Scotch Game: Scotch Gambit, Kingside Variation: 1
 Scotch Game: Scotch Gambit, Sarratt Variation: 1
 Scotch Game: Tartakower Variation: 6
 Semi-Slav Defense: 137
 Semi-Slav Defense Accepted: 7
 Semi-Slav Defense: Accelerated Meran Variation: 49
 Semi-Slav Defense: Accelerated Move Order: 36
 Semi-Slav Defense: Anti-Moscow Gambit: 8
 Semi-Slav Defense: Bogoljubow Variation: 5
 Semi-Slav Defense: Botvinnik Variation: 7
 Semi-Slav Defense: Chigorin Defense: 81
 Semi-Slav Defense: Main Line: 9
 Semi-Slav Defense: Marshall Gambit, Forgotten Variation: 6
 Semi-Slav Defense: Marshall Gambit, Main Line: 7
 Semi-Slav Defense: Meran Variation: 38
 Semi-Slav Defense: Meran Variation, Blumenfeld Variation: 1
 Semi-Slav Defense: Meran Variation, Lundin Variation: 12
 Semi-Slav Defense: Meran Variation, Reynolds' Variation: 3
 Semi-Slav Defense: Meran Variation, Wade Variation: 27
 Semi-Slav Defense: Meran Variation, Wade Variation, Larsen Variation: 3
 Semi-Slav Defense: Normal Variation: 20
 Semi-Slav Defense: Noteboom Variation: 3
 Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation: 3
 Semi-Slav Defense: Quiet Variation: 13
 Semi-Slav Defense: Romih Variation: 1
 Semi-Slav Defense: Stoltz Variation: 90
 Semi-Slav Defense: Stoltz Variation, Center Variation: 6
 Semi-Slav Defense: Stoltz Variation, Shabalov Attack: 10
 Sicilian Defense: 29
 Sicilian Defense: Accelerated Dragon: 2
 Sicilian Defense: Accelerated Dragon, Maróczy Bind: 64
 Sicilian Defense: Accelerated Dragon, Maróczy Bind, Breyer Variation: 8
 Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze Variation: 11
 Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation: 27
 Sicilian Defense: Accelerated Dragon, Modern Variation: 8
 Sicilian Defense: Alapin Variation: 85
 Sicilian Defense: Alapin Variation, Barmen Defense: 33
 Sicilian Defense: Alapin Variation, Barmen Defense, Modern Line: 27
 Sicilian Defense: Alapin Variation, Smith-Morra Declined: 50
 Sicilian Defense: Alapin Variation, Stoltz Attack: 6
 Sicilian Defense: Alapin Variation, Stoltz Attack, Ivanchuk Line: 4
 Sicilian Defense: Boleslavsky Variation: 34
 Sicilian Defense: Brussels Gambit: 1
 Sicilian Defense: Chekhover Variation: 26
 Sicilian Defense: Chekhover Variation, Zaitsev Defense: 1
 Sicilian Defense: Classical Variation: 32
 Sicilian Defense: Classical Variation, Anti-Sozin Variation: 10
 Sicilian Defense: Classical Variation, Dragon Transfer: 1
 Sicilian Defense: Classical Variation, Fianchetto Variation: 6
 Sicilian Defense: Classical Variation, Sozin Attack: 7
 Sicilian Defense: Closed: 70
 Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line: 1
 Sicilian Defense: Closed, Anti-Sveshnikov Variation, with Nf6: 4
 Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d6: 12
 Sicilian Defense: Closed, Botvinnik Defense, Edge Variation: 1
 Sicilian Defense: Closed, Botvinnik Defense, with Nge2: 2
 Sicilian Defense: Closed, Botvinnik Defense, with f4: 2
 Sicilian Defense: Closed, Chameleon Variation: 6
 Sicilian Defense: Closed, Fianchetto Variation: 1
 Sicilian Defense: Closed, Korchnoi Defense: 2
 Sicilian Defense: Closed, Traditional: 23
 Sicilian Defense: Delayed Alapin Variation: 54
 Sicilian Defense: Delayed Alapin Variation, with d6: 36
 Sicilian Defense: Delayed Alapin Variation, with e6: 48
 Sicilian Defense: Dragon Variation: 6
 Sicilian Defense: Dragon Variation, Classical Variation: 7
 Sicilian Defense: Dragon Variation, Classical Variation, Battery Variation: 5
 Sicilian Defense: Dragon Variation, Classical Variation, Maróczy Line: 1
 Sicilian Defense: Dragon Variation, Classical Variation, Normal Line: 1
 Sicilian Defense: Dragon Variation, Classical Variation, Tartakower Line: 1
 Sicilian Defense: Dragon Variation, Fianchetto Variation: 4
 Sicilian Defense: Dragon Variation, Levenfish Variation: 2
 Sicilian Defense: Dragon Variation, Modern Bc4 Variation: 3
 Sicilian Defense: Dragon Variation, Yugoslav Attack: 4
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Belezky Line: 5
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations: 1
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line: 1
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line: 10
 Sicilian Defense: Dragon Variation, Yugoslav Attack, Old Line: 4
 Sicilian Defense: Flohr Variation: 1
 Sicilian Defense: Four Knights Variation: 19
 Sicilian Defense: Four Knights Variation, Cobra Variation: 3
 Sicilian Defense: Four Knights Variation, Exchange Variation: 8
 Sicilian Defense: French Variation: 73
 Sicilian Defense: French Variation, Normal: 2
 Sicilian Defense: French Variation, Open: 4
 Sicilian Defense: French Variation, Westerinen Attack: 14
 Sicilian Defense: Godiva Variation: 11
 Sicilian Defense: Grand Prix Attack: 3
 Sicilian Defense: Heidenfeld Variation: 1
 Sicilian Defense: Hyperaccelerated Dragon: 12
 Sicilian Defense: Hyperaccelerated Fianchetto: 9
 Sicilian Defense: Hyperaccelerated Pterodactyl: 4
 Sicilian Defense: Kalashnikov Variation: 24
 Sicilian Defense: Kan Variation: 9
 Sicilian Defense: Kan Variation, Gipslis Variation: 2
 Sicilian Defense: Kan Variation, Knight Variation: 38
 Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein Variation: 1
 Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation: 21
 Sicilian Defense: Kan Variation, Modern Variation: 54
 Sicilian Defense: Kan Variation, Polugaevsky Variation: 39
 Sicilian Defense: Kan Variation, Swiss Cheese Variation: 8
 Sicilian Defense: Kan Variation, Wing Attack: 15
 Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack: 3
 Sicilian Defense: Keres Variation: 5
 Sicilian Defense: Kramnik Variation: 27
 Sicilian Defense: Kronberger Variation: 4
 Sicilian Defense: Kupreichik Variation: 10
 Sicilian Defense: Kveinis Variation: 12
 Sicilian Defense: Lasker-Dunne Attack: 3
 Sicilian Defense: Lasker-Pelikan Variation: 14
 Sicilian Defense: Lasker-Pelikan Variation, Bird Variation: 3
 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation: 7
 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation: 147
 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Novosibirsk Variation: 4
 Sicilian Defense: Löwenthal Variation: 3
 Sicilian Defense: McDonnell Attack: 7
 Sicilian Defense: McDonnell Attack, Tal Gambit: 2
 Sicilian Defense: Modern Variations: 32
 Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order: 6
 Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order Accepted: 2
 Sicilian Defense: Modern Variations, Main Line: 5
 Sicilian Defense: Moscow Variation: 106
 Sicilian Defense: Moscow Variation, Main Line: 190
 Sicilian Defense: Moscow Variation, Moscow Gambit: 1
 Sicilian Defense: Moscow Variation, Sokolsky Variation: 75
 Sicilian Defense: Najdorf Variation: 84
 Sicilian Defense: Najdorf Variation, Adams Attack: 15
 Sicilian Defense: Najdorf Variation, Amsterdam Variation: 21
 Sicilian Defense: Najdorf Variation, Browne Variation: 1
 Sicilian Defense: Najdorf Variation, English Attack: 84
 Sicilian Defense: Najdorf Variation, English Attack, Anti-English: 31
 Sicilian Defense: Najdorf Variation, Freak Attack: 3
 Sicilian Defense: Najdorf Variation, Goteborg Variation: 1
 Sicilian Defense: Najdorf Variation, Lipnitsky Attack: 5
 Sicilian Defense: Najdorf Variation, Main Line: 5
 Sicilian Defense: Najdorf Variation, Neo-Classical Defense: 3
 Sicilian Defense: Najdorf Variation, Opocensky Variation: 31
 Sicilian Defense: Najdorf Variation, Opocensky Variation, Modern Line: 6
 Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line: 33
 Sicilian Defense: Najdorf Variation, Poisoned Pawn Accepted: 3
 Sicilian Defense: Najdorf Variation, Poisoned Pawn Variation: 1
 Sicilian Defense: Najdorf Variation, Polugaevsky Variation, Simagin Line: 1
 Sicilian Defense: Najdorf Variation, Zagreb Variation: 18
 Sicilian Defense: Nimzowitsch Variation, Advance Variation: 2
 Sicilian Defense: Nimzowitsch Variation, Closed Variation: 5
 Sicilian Defense: Nimzowitsch Variation, Exchange Variation: 2
 Sicilian Defense: Nimzowitsch Variation, Main Line: 2
 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack: 139
 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation: 66
 Sicilian Defense: O'Kelly Variation, Maróczy Bind, Geller Line: 1
 Sicilian Defense: O'Kelly Variation, Maróczy Bind, Paulsen Line: 5
 Sicilian Defense: O'Kelly Variation, Maróczy Bind, Robatsch Line: 2
 Sicilian Defense: O'Kelly Variation, Réti System: 1
 Sicilian Defense: O'Kelly Variation, Venice System: 9
 Sicilian Defense: O'Kelly Variation, Venice System, Gambit Line: 1
 Sicilian Defense: O'Kelly Variation, Yerevan System: 5
 Sicilian Defense: Old Sicilian: 41
 Sicilian Defense: Open: 5
 Sicilian Defense: Paulsen-Basman Defense: 2
 Sicilian Defense: Pin Variation, Koch Variation: 1
 Sicilian Defense: Prins Variation: 15
 Sicilian Defense: Prins Variation, Venice Attack: 2
 Sicilian Defense: Richter-Rauzer Variation: 11
 Sicilian Defense: Richter-Rauzer Variation, Classical Variation: 21
 Sicilian Defense: Richter-Rauzer Variation, Classical Variation, Kantscher Line: 3
 Sicilian Defense: Richter-Rauzer Variation, Dragon Variation: 4
 Sicilian Defense: Richter-Rauzer Variation, Ivanov Variation: 2
 Sicilian Defense: Richter-Rauzer Variation, Modern Variation: 7
 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation: 16
 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations: 22
 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Nyezhmetdinov Attack: 1
 Sicilian Defense: Richter-Rauzer Variation, Traditional Variation: 1
 Sicilian Defense: Scheveningen Variation: 8
 Sicilian Defense: Scheveningen Variation, Classical Main Line: 2
 Sicilian Defense: Scheveningen Variation, Classical Variation: 48
 Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation: 5
 Sicilian Defense: Scheveningen Variation, Delayed Keres Attack: 5
 Sicilian Defense: Scheveningen Variation, Delayed Keres Attack, Perenyi Gambit: 1
 Sicilian Defense: Scheveningen Variation, English Attack, with Qd2: 5
 Sicilian Defense: Scheveningen Variation, English Attack, with f3: 11
 Sicilian Defense: Scheveningen Variation, Fianchetto Variation: 6
 Sicilian Defense: Scheveningen Variation, Keres Attack: 16
 Sicilian Defense: Scheveningen Variation, Matanovic Attack: 6
 Sicilian Defense: Scheveningen Variation, Modern Variation: 27
 Sicilian Defense: Smith-Morra Gambit Accepted: 1
 Sicilian Defense: Smith-Morra Gambit Declined, Scandinavian Formation: 1
 Sicilian Defense: Snyder Variation: 7
 Sicilian Defense: Sozin Attack: 4
 Sicilian Defense: Sozin Attack, Fischer Variation: 1
 Sicilian Defense: Sozin Attack, Flank Variation: 5
 Sicilian Defense: Sozin Attack, Leonhardt Variation: 2
 Sicilian Defense: Sozin Attack, Main Line: 7
 Sicilian Defense: Staunton-Cochrane Variation: 2
 Sicilian Defense: Taimanov Variation: 51
 Sicilian Defense: Taimanov Variation, Bastrikov Variation: 86
 Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack: 37
 Sicilian Defense: Taimanov Variation, Bastrikov Variation, Ponomariov Gambit: 1
 Sicilian Defense: Taimanov Variation, Modern Line: 5
 Sicilian Defense: Taimanov Variation, Normal Variation: 13
 Sicilian Defense: Taimanov Variation, Szén Variation: 12
 Sicilian Defense: Velimirovic Attack: 2
 Sicilian Defense: Wing Gambit Deferred: 1
 Slav Defense: 180
 Slav Defense: Alapin Variation: 6
 Slav Defense: Alekhine Variation: 4
 Slav Defense: Breyer Variation: 9
 Slav Defense: Chebanenko Variation: 102
 Slav Defense: Chebanenko Variation, Advance System: 71
 Slav Defense: Czech Variation: 7
 Slav Defense: Czech Variation, Bled Attack: 17
 Slav Defense: Czech Variation, Carlsbad Variation: 5
 Slav Defense: Czech Variation, Carlsbad Variation, Morozevich Variation: 2
 Slav Defense: Czech Variation, Classical System: 18
 Slav Defense: Czech Variation, Classical System, Main Line: 15
 Slav Defense: Czech Variation, Dutch Variation: 51
 Slav Defense: Czech Variation, Krause Attack: 16
 Slav Defense: Czech Variation, Wiesbaden Variation: 4
 Slav Defense: Czech Variation, Wiesbaden Variation, Sharp Line: 14
 Slav Defense: Exchange Variation: 361
 Slav Defense: Exchange Variation, Schallopp Variation: 1
 Slav Defense: Exchange Variation, Symmetrical Line: 495
 Slav Defense: Exchange Variation, Trifunovic Variation: 32
 Slav Defense: Geller Gambit: 3
 Slav Defense: Modern Line: 108
 Slav Defense: Quiet Variation: 73
 Slav Defense: Quiet Variation, Amsterdam Variation: 3
 Slav Defense: Quiet Variation, Pin Defense: 74
 Slav Defense: Quiet Variation, Schallopp Defense: 155
 Slav Defense: Schlechter Variation: 8
 Slav Defense: Slav Gambit, Alekhine Attack: 3
 Slav Defense: Smyslov Variation: 3
 Slav Defense: Soultanbeieff Variation: 36
 Slav Defense: Süchting Variation: 2
 Slav Defense: Two Knights Attack: 1
 Slav Defense: Winawer Countergambit: 3
 Slav Indian: 22
 Slav Indian: Kudischewitsch Gambit: 1
 St. George Defense: 1
 St. George Defense: Polish Variation: 2
 Tarrasch Defense: 3
 Tarrasch Defense: Classical Variation: 18
 Tarrasch Defense: Classical Variation, Advance Variation: 4
 Tarrasch Defense: Classical Variation, Carlsbad Variation: 6
 Tarrasch Defense: Classical Variation, Main Line: 1
 Tarrasch Defense: Classical Variation, Réti Variation: 1
 Tarrasch Defense: Dubov Tarrasch: 1
 Tarrasch Defense: Symmetrical Variation: 68
 Tarrasch Defense: Two Knights Variation: 3
 Three Knights Opening: 7
 Torre Attack: Classical Defense: 42
 Torre Attack: Classical Defense, Nimzowitsch Variation: 20
 Torre Attack: Fianchetto Defense: 41
 Torre Attack: Fianchetto Defense, Euwe Variation: 5
 Trompowsky Attack: 63
 Trompowsky Attack: Classical Defense: 17
 Trompowsky Attack: Classical Defense, Big Center Variation: 9
 Trompowsky Attack: Edge Variation: 4
 Trompowsky Attack: Poisoned Pawn Variation: 1
 Trompowsky Attack: Raptor Variation: 1
 Van Geet Opening: 6
 Van't Kruijs Opening: 4
 Vienna Game: 2
 Vienna Game: Anderssen Defense: 2
 Vienna Game: Falkbeer Variation: 2
 Vienna Game: Frankenstein-Dracula Variation: 3
 Vienna Game: Mieses Variation: 9
 Vienna Game: Paulsen Variation: 5
 Vienna Game: Stanley Variation: 1
 Vienna Game: Stanley Variation, Reversed Spanish: 1
 Vienna Game: Vienna Gambit, Bardeleben Variation: 1
 Vienna Game: Vienna Gambit, Breyer Variation: 1
 Vienna Game: Vienna Gambit, Kaufmann Variation: 1
 Vienna Game: Vienna Gambit, Modern Variation: 3
 Vienna Game: Vienna Gambit, Paulsen Attack: 1
 Wade Defense: 37
 Ware Opening: 13
 Yusupov-Rubinstein System: 34
 Zukertort Opening: 100
 Zukertort Opening: Black Mustang Defense: 1
 Zukertort Opening: Double Fianchetto Attack: 1
 Zukertort Opening: Dutch Variation: 19
 Zukertort Opening: Kingside Fianchetto: 49
 Zukertort Opening: Lemberger Gambit: 1
 Zukertort Opening: Nimzo-Larsen Variation: 17
 Zukertort Opening: Old Indian Attack: 2
 Zukertort Opening: Pirc Invitation: 10
 Zukertort Opening: Polish Defense: 5
 Zukertort Opening: Queen's Gambit Invitation: 4
 Zukertort Opening: Queenside Fianchetto Variation: 13
 Zukertort Opening: Quiet System: 2
 Zukertort Opening: Reversed Grünfeld: 12
 Zukertort Opening: Santasiere's Folly: 1
 Zukertort Opening: Sicilian Invitation: 48
 Zukertort Opening: Slav Invitation: 1
 Zukertort Opening: Wade Defense: 1
 Zukertort Opening: Wade Defense, Chigorin Plan: 2