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Puzzle 992019: Zwart naar winst in het eindspel

IM Nikolai Vlassov (2283) - GM Yi Xu (2507)
Titled Tue 19th Jul Early chess.com INT (3), 2022.07.19
  2. 1.e4
  3. c5
  4. 2.c3
  5. Nf6
  6. 3.e5
  7. Nd5
  8. 4.d4
  9. cxd4
  10. 5.cxd4
  11. d6
  12. 6.Bc4
  13. Nb6
  14. 7.Bb3
  15. Nc6
  16. 8.e6
  17. Bxe6
  18. 9.d5
  19. Bxd5
  20. 10.Bxd5
  21. Nxd5
  22. 11.Qxd5
  23. e6
  24. 12.Qb5
  25. Qd7
  26. 13.Nf3
  27. d5
  28. 14.O-O
  29. Bd6
  30. 15.Nc3
  31. O-O
  32. 16.Bg5
  33. a6
  34. 17.Qd3
  35. h6
  36. 18.Bh4
  37. Rae8
  38. 19.Bg3
  39. Bc5
  40. 20.Rad1
  41. f6
  42. 21.Nh4
  43. g5
  44. 22.Nf3
  45. Qh7
  46. 23.Nxd5
  47. Qxd3
  48. 24.Nxf6+
  49. Rxf6
  50. 25.Rxd3
  51. e5
  52. 26.Rd7
  53. e4
  54. 27.Nd2
  55. e3
  56. 28.fxe3
  57. Rxe3
  58. 29.Kh1
  59. Rxf1+
  60. 30.Nxf1
  61. Re7
  62. 31.Rxe7
  63. Bxe7
  64. 32.Kg1
  65. Kf7
  66. 33.Kf2
  67. Nb4
  68. 34.Ne3
  69. Ke6
  70. 35.Kf3
  71. Nxa2
  72. 36.Kg4
  73. Bf6
  74. 37.b3
  75. Nc1
  76. 38.b4
  77. Nd3
  78. 39.Nc2
  79. Bc3
  80. 40.Kh5
  81. Nxb4
  82. 41.Na3
  83. b5
  84. 42.Kxh6
  85. Bd2
  86. 43.Kg6
  87. Bc1
  88. 44.Nb1
  89. a5
  90. 45.Be1
  91. Nc6
  92. 46.g3
  93. b4
  94. 47.h4
  95. gxh4
  96. 48.gxh4
  97. a4
  98. 49.Bxb4
  99. Nxb4
  100. 50.h5
  101. Ke5
  102. 51.h6
  103. Bxh6
  104. 52.Kxh6
  105. Kd4
  106. 53.Kg5
  107. Kd3
  108. 54.Kf4
  109. Kc2
  110. 55.Na3+
  111. Kb2
  112. 56.Nb5
  113. Na2
  114. 57.Ke3
  115. Nc3
  116. 58.Nd6
  117. Kb3
  118. 59.Kd3
    1. Oplossing:59.Kd3
    2. a3
    3. 60.Nf5 with a winning endgame, for example:
      1. 60.Nc4
      2. a2
      3. 61.Na5+ with a winning endgame, for example:
      4. Ka4
      5. 62.Nc6
      6. a1=Q
      1. 60.Nb7 with a winning endgame, for example:
      2. a2
      3. 61.Na5+
      4. Ka4
      5. 62.Nc6
      6. a1=Q
    5. 60...a2
    6. 61.Nd4+
    7. Kb2
    8. 62.Nc2
    9. Ne4
    10. 63.Nd4
    11. Nf2+
    12. 64.Ke3
    13. a1=Q
  120. 59...a3
  121. 60.Nc4
  122. a2
  123. 61.Nd2+
  124. Kb2
  125. 62.Nc4+
  126. Kc1
  127. 63.Kxc3
  128. a1=Q+
  129. 64.Kd3
  130. Qf6
  131. 65.Ne3
  132. Qd6+
  133. 66.Ke4
  134. Qe7+
  135. 67.Kd4
  136. Kd2
  137. 68.Nc4+
  138. Kc2
  139. 69.Ne3+
  140. Kb3
  141. 70.Nd5
  142. Qh4+
  143. 71.Kc5
  144. Qc4+
  145. 72.Kd6
  146. Qd4
  147. 73.Kc6
  148. Ka4
  149. 74.Kd6
  150. Kb5
  151. 75.Ke6
  152. Kc5
  153. 76.Nf6
  154. Qe3+
  155. 77.Kf5
  156. Kd4
  157. 78.Ng4
  158. Qe4+
  159. 79.Kg5
  160. Qf3
  161. 80.Nf6
  162. Ke5
  163. 81.Ng4+
  164. Ke6
  165. 82.Nh6
  166. Qf6+
  167. 83.Kh5
  168. Qg7
  169. 84.Ng4
  170. Kf5
  171. 85.Ne3+
  172. Ke4
  173. 86.Ng4
  174. Kf4
  175. 87.Nh6
  176. Qg5#
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