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問題 761851: 白 が 防御とするために

FM Luis Enrique Valle Maytin (2268) - FM Danila Bilan (2303)
Titled Tue 25th Oct Early chess.com INT (6), 2022.10.25
  2. 1.e4
  3. c6
  4. 2.d4
  5. d5
  6. 3.e5
  7. c5
  8. 4.dxc5
  9. e6
  10. 5.a3
  11. Bxc5
  12. 6.b4
  13. Bb6
  14. 7.Nf3
  15. Ne7
  16. 8.Bd3
  17. a5
  18. 9.Bb2
  19. axb4
  20. 10.axb4
  21. Rxa1
  22. 11.Bxa1
  23. Nbc6
  24. 12.b5
  25. Na7
  26. 13.O-O
  27. Bd7
  28. 14.Na3
  29. Qc7
  30. 15.c4
  31. Bc5
  32. 16.Qa4
  33. b6
  34. 17.cxd5
  35. Nxd5
  36. 18.Nd4
  37. O-O
  38. 19.Rc1
  39. Qb7
  40. 20.Nac2
  41. Ra8
  42. 21.Qb3
  43. Rc8
  44. 22.Rd1
  45. Bf8
  46. 23.Be4
  47. Qc7
  48. 24.Bxd5
  49. exd5
  50. 25.Qxd5
  51. Bxb5
  52. 26.e6
  53. Bc4
  54. 27.exf7+
  55. Qxf7
  56. 28.Qxf7+
  57. Bxf7
  58. 29.Ne3
  59. b5
  60. 30.Rb1
  61. b4
  62. 31.h4
  63. Nc6
  64. 32.Nxc6
  65. Rxc6
  66. 33.Be5
  67. h6
  68. 34.g3
  69. b3
  70. 35.Kg2
  71. Bc5
  72. 36.Kf3
  73. Bxe3
  74. 37.fxe3
  75. Rc2
  76. 38.Rb2
  77. Bh5+
  78. 39.g4
  79. Bf7
  80. 40.Rxc2
  81. bxc2
    1. 解決策:40...bxc2
      1. 脅威を与える:
      2. 41...c1=Q
    3. 41.Bb2
    4. さて、もしc1=Q
    5. 42.Bxc1
  83. 41.Bb2
  84. g5
  85. 42.hxg5
  86. hxg5
  87. 43.e4
  88. Kh7
  89. 44.Bc1
  90. Kg6
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