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Puzzle 1002506: Zwart naar Verdedigen en winnen

COMP Ostrich - COMP Chess 4.7
ACM Washington DC Washington D.C., 1978
  2. 1.e4
  3. e5
  4. 2.Nf3
  5. Nf6
  6. 3.Nxe5
  7. d6
  8. 4.Nf3
  9. Nxe4
  10. 5.Qe2
  11. Qe7
  12. 6.d3
  13. Nf6
  14. 7.Bg5
  15. Nbd7
  16. 8.Nc3
  17. Qxe2+
  18. 9.Kxe2
  19. h6
  20. 10.Be3
  21. b6
  22. 11.Nb5
  23. Nd5
  24. 12.c4
  25. a6
  26. 13.Nxd6+
  27. Bxd6
  28. 14.cxd5
  29. Bb7
  30. 15.Nd4
  31. Bxd5
  32. 16.Ke1
  33. Be5
  34. 17.f4
  35. Bf6
  36. 18.Kd2
  37. c5
  38. 19.Nc2
  39. Bxb2
  40. 20.Rb1
    1. Oplossing:20.Rb1
      1. Dreigend:
      2. 21.Rxb2
    3. Bf6 Black is winning because of Black's material advantage, better king safety, better pawn structure and piece activity.
      1. Niet20...Bd4 vanwege
      2. 21.Nxd4
    5. Nu als21.Rb2
    6. Bxb2
  42. 20...Bf6
  43. 21.a3
  44. O-O
  45. 22.Kd1
  46. Ba2
  47. 23.Bxc5
  48. Rfc8
  49. 24.Rxb6
  50. Nxb6
  51. 25.d4
  52. Bb3
  53. 26.Ke1
  54. Na4
  55. 27.Nb4
  56. Nxc5
  57. 28.dxc5
  58. Rxc5
  59. 29.Rg1
  60. Rc1+
  61. 30.Kd2
  62. Rd8+
  63. 31.Ke2
  64. Bd4
  65. 32.Rh1
  66. Re8+
  67. 33.Kf3
  68. Bd1+
  69. 34.Kg3
  70. Re3+
  71. 35.Kf2
  72. Rd3+
  73. 36.Ke1
  74. Bg4#
0-1
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