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Puzzle 769702: Les blancs défendent et gagnent

FM Lefong Hua (2305) - IM Andrew Brown (2279)
Titled Tue 1st Nov Late chess.com INT (9), 2022.11.01
  2. 1.d4
  3. g6
  4. 2.c4
  5. Fg7
  6. 3.e4
  7. d6
  8. 4.f4
  9. Cd7
  10. 5.Cf3
  11. e5
  12. 6.fxe5
  13. dxe5
  14. 7.d5
  15. Cgf6
  16. 8.Cc3
  17. Cc5
  18. 9.Fg5
  19. h6
  20. 10.Fxf6
  21. Dxf6
  22. 11.b4
  23. Cxe4
  24. 12.Cxe4
  25. Db6
  26. 13.Db3
  27. a5
  28. 14.c5
  29. Dxb4+
  30. 15.Dxb4
  31. axb4
  32. 16.Fb5+
  33. Fd7
  34. 17.Fxd7+
  35. Rxd7
  36. 18.O-O
  37. f5
    1. Solution:18...f5
      1. Menace:
      2. 19...fxe4
    3. 19.Ch4
    4. Re8
      1. Maintenant si19...fxe4
      2. 20.Tf7+
    6. 20.Cxg6
    7. fxe4
    8. 21.Cxh8 White is winning because of White's material advantage, piece activity and better pawn structure.
  39. 19.c6+
  40. bxc6
  41. 20.dxc6+
  42. Rxc6
  43. 21.Tac1+
  44. Rb6
  45. 22.Cc5
  46. e4
  47. 23.Ce5
  48. Txa2
  49. 24.Ccd7+
  50. Rb7
  51. 25.Cc6
  52. Fc3
  53. 26.Cxb4
  54. Fxb4
  55. 27.Tb1
  56. Rc8
  57. 28.Txb4
  58. Rxd7
  59. 29.Td1+
  60. Re7
  61. 30.Tc4
  62. Tc8
  63. 31.Tc6
  64. Rf7
  65. 32.h4
  66. e3
  67. 33.Td7+
  68. Re8
  69. 34.Td5
  70. Ta1+
  71. 35.Rh2
  72. Rf7
  73. 36.Td7+
  74. Rf8
  75. 37.Tf6+
  76. Re8
  77. 38.Tff7
  78. e2
  79. 39.Tfe7+
  80. Rf8
  81. 40.Tf7+
  82. Re8
  83. 41.Tde7+
  84. Rd8
  85. 42.Td7+
  86. Re8
1/2-1/2
Suivant ? Aide