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問題 858846: 白 が 終盤で引き分けとするために

GM S. Ganguly (2625) - GM T. Banusz (2631)
54th Biel Master Open Biel SUI, 2021.08.01
  2. 1.Nf3
  3. d5
  4. 2.e3
  5. Nf6
  6. 3.c4
  7. e6
  8. 4.Nc3
  9. Nbd7
  10. 5.b3
  11. b6
  12. 6.Bb2
  13. Bb7
  14. 7.cxd5
  15. exd5
  16. 8.Rc1
  17. a6
  18. 9.d4
  19. Bd6
  20. 10.g3
  21. Qe7
  22. 11.Bg2
  23. O-O-O
  24. 12.Qc2
  25. Kb8
  26. 13.a3
  27. Ne4
  28. 14.Nxe4
  29. dxe4
  30. 15.Nd2
  31. f5
  32. 16.Nc4
  33. g5
  34. 17.Nxd6
  35. Qxd6
  36. 18.Bc3
  37. Rc8
  38. 19.Bb4
  39. Qg6
  40. 20.Qe2
  41. Nf6
  42. 21.h4
  43. h6
  44. 22.Bd2
  45. Nd5
  46. 23.Kd1
  47. Qd6
  48. 24.b4
  49. f4
  50. 25.gxf4
  51. gxf4
  52. 26.Bh3
  53. Rcf8
  54. 27.Kc2
  55. Rf6
  56. 28.Kb2
  57. Rhf8
  58. 29.Qe1
  59. Bc6
  60. 30.Bf1
  61. fxe3
  62. 31.fxe3
  63. Bb5
  64. 32.Bxb5
  65. axb5
  66. 33.Rc2
  67. Rf2
  68. 34.Bc1
  69. Qg3
  70. 35.Kb3
  71. Kb7
  72. 36.Rxf2
  73. Rxf2
  74. 37.Rf1
  75. Rf3
  76. 38.Qxg3
  77. Rxg3
  78. 39.Rf5
  79. Nxe3
  80. 40.Bxe3
  81. Rxe3+
  82. 41.Kb2
  83. Kc6
  84. 42.Re5
  85. Kd6
  86. 43.Rxb5
  87. Rd3
  88. 44.Rh5
  89. e3
  90. 45.Rxh6+
  91. Kd5
  92. 46.Rh7
  93. Kxd4
  94. 47.Rd7+
  95. Ke4
  96. 48.Re7+
  97. Kf3
  98. 49.h5
  99. Rd6
  100. 50.Kc2
  101. e2
  102. 51.Rf7+
  103. Kg2
  104. 52.Rg7+
  105. Kf2
  106. 53.Rf7+
  107. Ke1
  108. 54.b5
  109. c6
  110. 55.a4
  111. cxb5
  112. 56.axb5
  113. Rh6
  114. 57.Rf6
  115. Rxh5
  116. 58.Rxb6
  117. Rf5
  118. 59.Kd3
  119. Rf3+
  120. 60.Kc4
  121. Kf2
  122. 61.Re6
  123. Re3
  124. 62.Rf6+
  125. Kg3
  126. 63.Rg6+
  127. Kf4
  128. 64.Rg1
  129. e1=Q
  130. 65.Rxe1
  131. Rxe1
  132. 66.Kd5
  133. Kf5
  134. 67.b6
  135. Rb1
    1. 解決策:67...Rb1
    2. 68.Kc6
    3. Ke6
      1. 68...Ke4 with a drawn endgame, for example:
      2. 69.Kc7
      3. Kd5
      4. 70.b7
      5. Kc5
      6. 71.b8=Q
      7. Rxb8
      8. 72.Kxb8
    5. 69.b7
      1. 69.Kc7
      2. Rc1+
      3. 70.Kd8
      4. Rd1+
        1. 70...Rb1
        2. 71.Kc7
        3. Rc1+ 反復による引き分け
      6. 71.Kc7
      7. Rc1+
        1. 71...Ke7
        2. 72.b7
        3. Rc1+ 反復による引き分け
        1. 71...Kd5 with a drawn endgame, for example:
        2. 72.b7
        3. Rb1
        4. 73.b8=Q
        5. Rxb8
        6. 74.Kxb8
      9. 72.Kd8
      10. Rd1+
        1. 72...Rb1
        2. 73.Kc7
        3. Rc1+ 反復による引き分け
      12. 73.Kc7
      13. Ke7
        1. 73...Kd5 with a drawn endgame, for example:
        2. 74.b7
        3. Rb1
        4. 75.b8=Q
        5. Rxb8
        6. 76.Kxb8
      15. 74.b7
      16. Rc1+ 反復による引き分け
        1. 74...Rb1 with a drawn endgame, for example:
        2. 75.b8=Q
        3. Rxb8
        4. 76.Kxb8
    7. 69...Ke7
      1. 69...Rxb7
      2. 70.Kxb7
    9. 70.Kc7
    10. Rc1+
    11. 71.Kb6
    12. Rb1+
      1. 71...Re1 with a drawn endgame, for example:
      2. 72.b8=Q
      3. Rb1+
      1. 71...Kd7 with a drawn endgame, for example:
      2. 72.b8=R
      3. Rb1+
    14. 72.Ka7
      1. 72.Kc7 反復による引き分け
    16. 72...Ra1+
    17. 73.Kb6
      1. 73.Kb8
      2. Rb1 with a drawn endgame, for example:
        1. 73...Kd6
        2. 74.Kc8
        3. Rc1+
        4. 75.Kd8
        5. Rb1
        6. 76.Kc8
        7. Rc1+
        8. 77.Kd8
        9. Rb1
        10. 78.Kc8
        11. Rc1+ 反復による引き分け
        1. 73...Ke8
        2. 74.Kc7
        3. Rc1+
        4. 75.Kb6
        5. Kd7 with a drawn endgame, for example:
        6. 76.b8=R
        7. Rb1+
      4. 74.Kc7
    19. 73...Rb1+
      1. 73...Rc1 with a drawn endgame, for example:
      2. 74.b8=R
      3. Rb1+
      1. 73...Kd7 with a drawn endgame, for example:
      2. 74.b8=Q
      3. Rb1+
    21. 74.Ka7
      1. 74.Kc7
      2. Rc1+
      3. 75.Kb6
      4. Rb1+ 反復による引き分け
        1. 75...Re1 with a drawn endgame, for example:
        2. 76.b8=Q
        3. Rb1+
        1. 75...Kd7 with a drawn endgame, for example:
        2. 76.b8=R
        3. Rb1+
    23. 74...Ra1+
    24. 75.Kb6
      1. 75.Kb8
      2. Rb1 with a drawn endgame, for example:
        1. 75...Kd6
        2. 76.Kc8
        3. Rc1+
        4. 77.Kd8
        5. Rb1
        6. 78.Kc8
        7. Rc1+
        8. 79.Kd8
        9. Rb1
        10. 80.Kc8
        11. Rc1+ 反復による引き分け
        1. 75...Ke8
        2. 76.Kc7
        3. Rc1+
        4. 77.Kb6
        5. Kd7 with a drawn endgame, for example:
        6. 78.b8=R
        7. Rb1+
      4. 76.Kc7
      5. Rd1
      6. 77.b8=Q
      7. Rc1+
    26. 75...Rb1+ 反復による引き分け
      1. 75...Rc1 with a drawn endgame, for example:
      2. 76.b8=R
      3. Rb1+
      1. 75...Kd7 with a drawn endgame, for example:
      2. 76.b8=Q
      3. Rb1+
  137. 68.Kc6
  138. Ke6
  139. 69.b7
  140. Rxb7
  141. 70.Kxb7
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