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問題 892279: 黒 が 守って勝つとするために

Petros Rahmanidis (2278) - FM Ioannis Kalogeris (2409)
23rd ch-EUR Indiv 2023 Vrnjacka Banja SRB, 2023.03.13
  2. 1.e4
  3. c6
  4. 2.d4
  5. d5
  6. 3.exd5
  7. cxd5
  8. 4.Bd3
  9. Nf6
  10. 5.h3
  11. Nc6
  12. 6.c3
  13. Ne4
  14. 7.Nd2
  15. f5
  16. 8.Ndf3
  17. e6
  18. 9.Bf4
  19. g5
  20. 10.Bh2
  21. Bg7
  22. 11.Ne5
  23. h5
  24. 12.Nxc6
  25. bxc6
  26. 13.Nf3
  27. g4
  28. 14.Ne5
  29. a5
  30. 15.Bf4
  31. Ba6
  32. 16.Bxa6
  33. Rxa6
  34. 17.Qe2
  35. Rb6
  36. 18.hxg4
  37. hxg4
  38. 19.O-O-O
  39. Rxh1
  40. 20.Rxh1
  41. Qe7
  42. 21.Qc2
  43. Bxe5
  44. 22.Bxe5
  45. Qg5+
  46. 23.Kb1
  47. Nd2+
  48. 24.Ka1
  49. Nc4
  50. 25.b3
  51. Nxe5
  52. 26.dxe5
  53. Qf4
  54. 27.Qe2
  55. Kf7
  56. 28.g3
  57. Qe4
  58. 29.Qxe4
  59. dxe4
  60. 30.c4
  61. Kg6
  62. 31.Rh8
  63. Rb7
  64. 32.Kb2
  65. Rd7
  66. 33.Kc2
  67. c5
  68. 34.Rf8
  69. Rd3
  70. 35.Rf6+
  71. Kg7
  72. 36.Rxe6
  73. Rf3
  74. 37.Re8
  75. Rxf2+
  76. 38.Kd1
  77. Kg6
  78. 39.Rf8
  79. Kg7
  80. 40.Rc8
  81. f4
  82. 41.Ke1
  83. fxg3
  84. 42.e6
  85. e3
  86. 43.e7
    1. 解決策:43.e7
      1. 脅威を与える:
      2. 44.e8=Q
    3. g2
    4. 44.Rg8+
      1. さて、もし44.e8=Q
      2. g1=Q#
    6. 44...Kf6
    7. 45.Rxg4
    8. Kxe7 Black is winning. White's better pawn structure is not enough compensation for Black's passed pawn(s), material advantage and piece activity.
  88. 43...g2
  89. 44.Rg8+
  90. Kf6
0-1
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