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Puzzle 990209: Zwart naar winst in het eindspel

FM Ashot Parvanyan (2374) - GM Alexa Donchenko (2554)
GRENKE Chess Open 2017 Karlsruhe GER, 2017.04.15
  2. 1.Nf3
  3. Nf6
  4. 2.c4
  5. e6
  6. 3.g3
  7. a6
  8. 4.Bg2
  9. b5
  10. 5.b3
  11. c5
  12. 6.O-O
  13. Bb7
  14. 7.d4
  15. bxc4
  16. 8.bxc4
  17. cxd4
  18. 9.Bb2
  19. Be7
  20. 10.Nxd4
  21. Bxg2
  22. 11.Kxg2
  23. Qc7
  24. 12.Qb3
  25. O-O
  26. 13.Nd2
  27. Nc6
  28. 14.Qa4
  29. Rfc8
  30. 15.Nxc6
  31. Qxc6+
  32. 16.Qxc6
  33. Rxc6
  34. 17.Bxf6
  35. Bxf6
  36. 18.Rab1
  37. Kf8
  38. 19.Rfd1
  39. Ke7
  40. 20.Rb7
  41. Be5
  42. 21.e3
  43. Kd8
  44. 22.Nb3
  45. Bc7
  46. 23.c5
  47. Rb8
  48. 24.Rxb8+
  49. Bxb8
  50. 25.Na5
  51. Rc7
  52. 26.c6
  53. Ba7
  54. 27.cxd7
  55. Bb6
  56. 28.Nb3
  57. Rxd7
  58. 29.Rxd7+
  59. Kxd7
  60. 30.Kf3
  61. Kc6
  62. 31.Ke4
  63. Kb5
  64. 32.Kd3
  65. Kb4
  66. 33.Kc2
  67. f5
  68. 34.Nc1
  69. g5
  70. 35.Nd3+
  71. Ka3
  72. 36.Kb1
  73. g4
  74. 37.Nf4
  75. e5
  76. 38.Nd3
  77. e4
  78. 39.Ne5
  79. Bc5
  80. 40.Nc6
  81. h5
  82. 41.Kc2
  83. Kxa2
  84. 42.Nd4
  85. a5
  86. 43.Nxf5
  87. Bf8
  88. 44.Nd4
  89. Bb4
  90. 45.Ne2
  91. Be1
  92. 46.Nf4
  93. h4
  94. 47.gxh4
  95. Bxf2
  96. 48.Nd5
  97. Bg1
  98. 49.Nf6
  99. Bxe3
  100. 50.Nxe4
  101. Ka3
  102. 51.Kc3
  103. Bf4
  104. 52.Nf2
  105. Be5+
  106. 53.Kc2
  107. Bd4
  108. 54.Nxg4
  109. a4
  110. 55.Nh6
  111. Kb4
  112. 56.Nf5
  113. Bh8
  114. 57.Ne3
  115. a3
  116. 58.Kb1
  117. Kb3
  118. 59.Nc2
  119. a2+
  120. 60.Kc1
  121. Bg7
  122. 61.Kd1
  123. Kb2
  124. 62.h5
  125. Kb1
  126. 63.h3
  127. Kb2
  128. 64.h4
  129. Bc3
  130. 65.h6
  131. Ba5
  132. 66.h7
    1. Oplossing:66.h7
    2. Bc3
    3. 67.h8=Q
      1. 67.h5
      2. Be5
      3. 68.Kd2
      4. Bg7
    5. 67...Bxh8
    6. 68.Kd2 with a winning endgame, for example:
      1. 68.h5 with a winning endgame, for example:
      2. Bg7
      3. 69.Kd2
      4. Bh6+
      5. 70.Kd3
      6. Bc1
      7. 71.Nd4
      8. a1=Q
    8. 68...Bf6
    9. 69.Kd1
    10. Bxh4
    11. 70.Kd2
    12. Bg5+
    13. 71.Kd3
    14. Bf4
    15. 72.Nd4
    16. a1=Q
  134. 66...Bc3
  135. 67.h5
  136. Be5
  137. 68.Kd2
  138. Bf4+
  139. 69.Kd3
  140. Be5
  141. 70.Kd2
  142. Bg7
  143. 71.Kd3
  144. Kb1
  145. 72.Kd2
  146. Bh6+
  147. 73.Kd3
  148. Bg7
  149. 74.Kd2
  150. Bh8
  151. 75.Kd3
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