ecocodes

C Open games and the French Defense

Volume C spreads 1,250 named lines over its 100 codes, from 30 openings. Of these, 1,248 open with 1.e4, and after that the commonest replies are 1...e5 (1033), 1...e6 (212), 1...d6 (2). The busiest code is C44 with 53 lines; six codes hold a single line. The deepest line in the volume, Ruy Lopez: Marshall Attack, Main Line, Spassky Variation (C89), runs to 18...Qh5.

The hundred codes of volume C

  1. C00French Defense
  2. C01French Defense
  3. C02French Defense
  4. C03French Defense
  5. C04French Defense
  6. C05French Defense
  7. C06French Defense
  8. C07French Defense
  9. C08French Defense
  10. C09French Defense
  11. C10French Defense
  12. C11French Defense
  13. C12French Defense
  14. C13French Defense
  15. C14French Defense
  16. C15French Defense
  17. C16French Defense
  18. C17French Defense
  19. C18French Defense
  20. C19French Defense
  21. C20King’s Pawn Game
  22. C21Center Game
  23. C22Center Game
  24. C23Bishop’s Opening
  25. C24Bishop’s Opening
  26. C25Vienna Game
  27. C26Vienna Game
  28. C27Vienna Game
  29. C28Vienna Game
  30. C29Vienna Game
  31. C30King’s Gambit
  32. C31King’s Gambit
  33. C32King’s Gambit
  34. C33King’s Gambit
  35. C34King’s Gambit
  36. C35King’s Gambit
  37. C36King’s Gambit
  38. C37King’s Gambit
  39. C38King’s Gambit
  40. C39King’s Gambit
  41. C40Latvian Gambit
  42. C41Philidor Defense
  43. C42Petrov’s Defense
  44. C43Petrov’s Defense
  45. C44Scotch Game
  46. C45Scotch Game
  47. C46Three Knights Opening
  48. C47Four Knights Game
  49. C48Four Knights Game
  50. C49Four Knights Game
  51. C50Italian Game
  52. C51Italian Game
  53. C52Italian Game
  54. C53Italian Game
  55. C54Italian Game
  56. C55Italian Game
  57. C56Italian Game
  58. C57Italian Game
  59. C58Italian Game
  60. C59Italian Game
  61. C60Ruy Lopez
  62. C61Ruy Lopez
  63. C62Ruy Lopez
  64. C63Ruy Lopez
  65. C64Ruy Lopez
  66. C65Ruy Lopez
  67. C66Ruy Lopez
  68. C67Ruy Lopez
  69. C68Ruy Lopez
  70. C69Ruy Lopez
  71. C70Ruy Lopez
  72. C71Ruy Lopez
  73. C72Ruy Lopez
  74. C73Ruy Lopez
  75. C74Ruy Lopez
  76. C75Ruy Lopez
  77. C76Ruy Lopez
  78. C77Ruy Lopez
  79. C78Ruy Lopez
  80. C79Ruy Lopez
  81. C80Ruy Lopez
  82. C81Ruy Lopez
  83. C82Ruy Lopez
  84. C83Ruy Lopez
  85. C84Ruy Lopez
  86. C85Ruy Lopez
  87. C86Ruy Lopez
  88. C87Ruy Lopez
  89. C88Ruy Lopez
  90. C89Ruy Lopez
  91. C90Ruy Lopez
  92. C91Ruy Lopez
  93. C92Ruy Lopez
  94. C93Ruy Lopez
  95. C94Ruy Lopez
  96. C95Ruy Lopez
  97. C96Ruy Lopez
  98. C97Ruy Lopez
  99. C98Ruy Lopez
  100. C99Ruy Lopez

First moves

First moveLinesShare
1.e41248100%
1.d410%
1.f310%

Openings with most lines here

  1. Ruy Lopez 235
  2. French Defense 211
  3. King’s Gambit 191
  4. Italian Game 187
  5. Scotch Game 53
  6. Petrov’s Defense 50
  7. Four Knights Game 49
  8. Philidor Defense 44
  9. Bishop’s Opening 41
  10. Vienna Game 41
  11. King’s Pawn Game 36
  12. Latvian Gambit 26
  13. Center Game 19
  14. Ponziani Opening 16
  15. Vienna Gambit 15
  16. Danish Gambit 8
  17. Three Knights Opening 6
  18. Elephant Gambit 4
  19. King’s Pawn Opening 3
  20. Portuguese Opening 3
  21. King’s Knight Opening 3
  22. Rat Defense 1
  23. French Defense, Classical, 4. Bg5 1
  24. Barnes Opening 1
  25. Bongcloud Attack 1
  26. English Opening 1
  27. Van Geet Opening 1
  28. Gunderam Defense 1
  29. Dresden Opening 1
  30. Irish Gambit 1

Every code in volume C

Each code’s reference line is its shortest named line; “Deepest” is the length in plies of its longest.

CodeReference lineMovesLinesDeepest
C00French Defense1.e4 e64312
C01French Defense: Exchange Variation1.e4 e6 2.d4 d5 3.exd5610
C02French Defense: Advance Variation1.e4 e6 2.d4 d5 3.e52217
C03French Defense: Tarrasch Variation1.e4 e6 2.d4 d5 3.Nd2610
C04French Defense: Tarrasch Variation, Guimard Defense, Main Line1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.Ngf3 Nf618
C05French Defense: Tarrasch Variation, Closed Variation1.e4 e6 2.d4 d5 3.Nd2 Nf6412
C06French Defense: Tarrasch Variation, Closed Variation, Main Line1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3 c5 6.c3 Nc6 7.Ne2 cxd4 8.cxd4216
C07French Defense: Tarrasch Variation, Open System1.e4 e6 2.d4 d5 3.Nd2 c5720
C08French Defense: Tarrasch Variation, Open System1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5210
C09French Defense: Tarrasch Variation, Open System, Main Line1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Ngf3 Nc6217
C10French Defense: Paulsen Variation1.e4 e6 2.d4 d5 3.Nc31013
C11French Defense: Classical Variation1.e4 e6 2.d4 d5 3.Nc3 Nf61518
C12French Defense, Classical, 4. Bg51.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg51417
C13French Defense: Classical Variation, Burn Variation1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe41614
C14French Defense: Classical Variation1.e4 e6 2.d4 d5 3.Nc3 a6 4.Nf3 Nf6 5.e5 Nfd7 6.Bg5820
C15French Defense: Winawer Variation1.e4 e6 2.d4 d5 3.Nc3 Bb41416
C16French Defense: Winawer Variation, Advance Variation1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e528
C17French Defense: Winawer Variation, Advance Variation1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5913
C18French Defense: Winawer Variation, Advance Variation1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc31619
C19French Defense: Winawer Variation, Positional Variation1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Nf31418
C20King’s Pawn Game1.e4 e53012
C21Center Game Accepted1.e4 e5 2.d4 exd41910
C22Center Game: Normal Variation1.e4 e5 2.d4 exd4 3.Qxd4 Nc6717
C23Bishop’s Opening1.e4 e5 2.Bc42417
C24Bishop’s Opening: Berlin Defense1.e4 e5 2.Bc4 Nf61012
C25Vienna Game1.e4 e5 2.Nc33117
C26Vienna Game: Falkbeer Variation1.e4 e5 2.Nc3 Nf61011
C27Vienna Game: Frankenstein-Dracula Variation1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4720
C28Vienna Game: Stanley Variation, Three Knights Variation1.e4 e5 2.Nc3 Nc6 3.Bc4 Nf639
C29Vienna Game: Vienna Gambit1.e4 e5 2.Nc3 Nf6 3.f41015
C30King’s Gambit1.e4 e5 2.f43216
C31King’s Gambit Declined: Falkbeer Countergambit1.e4 e5 2.f4 d51512
C32King’s Gambit Declined: Falkbeer Countergambit, Charousek Gambit Accepted1.e4 e5 2.f4 d5 3.exd5 e4 4.d3 Nf6 5.dxe4817
C33King’s Gambit Accepted1.e4 e5 2.f4 exf44613
C34King’s Gambit Accepted: King’s Knight’s Gambit1.e4 e5 2.f4 exf4 3.Nf31312
C35King’s Gambit Accepted: Cunningham Defense1.e4 e5 2.f4 exf4 3.Nf3 Be7413
C36King’s Gambit Accepted: Modern Defense1.e4 e5 2.f4 exf4 3.Nf3 d5414
C37King’s Gambit Accepted: King’s Knight’s Gambit1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc43421
C38King’s Gambit Accepted: Traditional Variation1.e4 e5 2.f4 exf4 3.Nf3 g5 4.Bc4 Bg7619
C39King’s Gambit Accepted: King’s Knight’s Gambit1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h43019
C40King’s Knight Opening1.e4 e5 2.Nf34014
C41Philidor Defense1.e4 e5 2.Nf3 d64419
C42Petrov’s Defense1.e4 e5 2.Nf3 Nf64020
C43Petrov’s Defense: Modern Attack1.e4 e5 2.Nf3 Nf6 3.d41214
C44King’s Knight Opening: Normal Variation1.e4 e5 2.Nf3 Nc65319
C45Scotch Game1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd42824
C46Three Knights Opening1.e4 e5 2.Nf3 Nc6 3.Nc369
C47Four Knights Game1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf62022
C48Four Knights Game: Spanish Variation1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb51320
C49Four Knights Game: Spanish Variation, Double Spanish1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb41520
C50Italian Game1.e4 e5 2.Nf3 Nc6 3.Bc42212
C51Italian Game: Evans Gambit1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b42926
C52Italian Game: Evans Gambit, Main Line1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba52221
C53Italian Game: Classical Variation1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3817
C54Italian Game: Classical Variation1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf64627
C55Italian Game: Two Knights Defense1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6614
C56Italian Game: Two Knights Defense, Open Variation1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d42426
C57Italian Game: Two Knights Defense, Knight Attack1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng51722
C58Italian Game: Two Knights Defense, Polerio Defense1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na51019
C59Italian Game: Two Knights Defense, Polerio Defense, Suhle Defense1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.Be2 h6423
C60Ruy Lopez1.e4 e5 2.Nf3 Nc6 3.Bb51916
C61Ruy Lopez: Bird Variation1.e4 e5 2.Nf3 Nc6 3.Bb5 Nd4210
C62Ruy Lopez: Steinitz Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 d6511
C63Ruy Lopez: Schliemann Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 f5914
C64Ruy Lopez: Classical Variation1.e4 e5 2.Nf3 Nc6 3.Bb5 Bc51013
C65Ruy Lopez: Berlin Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf61310
C66Ruy Lopez: Berlin Defense, Improved Steinitz Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O d6714
C67Ruy Lopez: Berlin Defense, Rio Gambit Accepted1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe41626
C68Ruy Lopez: Exchange Variation1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6614
C69Ruy Lopez: Exchange Variation, Normal Variation1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O512
C70Ruy Lopez: Morphy Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a61211
C71Ruy Lopez: Morphy Defense, Modern Steinitz Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6416
C72Ruy Lopez: Morphy Defense, Modern Steinitz Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.O-O218
C73Ruy Lopez: Morphy Defense, Modern Steinitz Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.Bxc6+ bxc6 6.d4212
C74Ruy Lopez: Morphy Defense, Modern Steinitz Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3313
C75Ruy Lopez: Morphy Defense, Modern Steinitz Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 Bd7212
C76Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Fianchetto Variation1.e4 e5 2.Nf3 Nc6 3.Bb5 g6 4.c3 a6 5.Ba4 d6 6.d4 Bd7112
C77Ruy Lopez: Morphy Defense, Anderssen Variation1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d3816
C78Ruy Lopez: Morphy Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O920
C79Ruy Lopez: Morphy Defense, Steinitz Deferred1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O d6419
C80Ruy Lopez: Open1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe41821
C81Ruy Lopez: Open, Howell Attack1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.Qe2324
C82Ruy Lopez: Open1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3722
C83Ruy Lopez: Open, Classical Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Be7625
C84Ruy Lopez: Closed1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7616
C85Ruy Lopez: Closed, Delayed Exchange1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Bxc6111
C86Ruy Lopez: Closed, Worrall Attack1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2417
C87Ruy Lopez: Closed, Averbakh Variation1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6112
C88Ruy Lopez: Closed1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3927
C89Ruy Lopez: Marshall Attack1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5936
C90Ruy Lopez: Closed1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O417
C91Ruy Lopez: Closed, Yates Variation1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.d4319
C92Ruy Lopez: Closed1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3624
C93Ruy Lopez: Closed, Smyslov Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 h6118
C94Ruy Lopez: Closed, Breyer Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8219
C95Ruy Lopez: Closed, Breyer1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Nb8 10.d4424
C96Ruy Lopez: Closed, Chigorin Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2622
C97Ruy Lopez: Closed, Chigorin Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5328
C98Ruy Lopez: Closed, Chigorin Defense1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Nc6225
C99Ruy Lopez: Closed, Chigorin Defense, Panov System1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 cxd4 13.cxd4125