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giovedì 10 giugno 2010

Re, Alfiere e Cavallo contro pedone (promosso a Cavallo!)

Re, Alfiere e Cavallo contro pedone (promosso a Cavallo!)

Una posizione rara in cui il Nero, promuovendo a Cavallo, prende matto in 73 mosse dopo la promozione.


Il Bianco vince in 75 mosse.
FEN "8/8/8/2N5/2K5/8/1p6/1k3B2 w - -"

1. Bd3+ Ka2 2. Na4 b1=N (2... b1=Q 3. Nc3+ Ka1 4. Nxb1 Kb2
5. Nd2 Ka2 6. Nb3 Ka3 7. Kc3 Ka2 8. Bc2 Ka3 9. Bb1 Ka4
10. Nd4 Ka5 11. Be4 Ka4 12. Bd5 Ka3 13. Nb5+ Ka4 14. Kc4
Ka5 15. Kc5 Ka4 16. Bc4 Ka5 17. Bb3 Ka6 18. Nd6 Ka5
19. Nb7+ Ka6 20. Kc6 Ka7 21. Bc4 Ka8 22. Nd6 Ka7 23. Kc7
Ka8 24. Bb5 Ka7 25. Nc8+ Ka8 26. Bc6#) 3. Kb5 Ka1 4. Kb4
Ka2 5. Bc4+ Ka1 6. Bd5 Nd2 7. Kc3 Nb1+ 8. Kc2 Na3+ 9. Kb3
Nb5 10. Nc5 Nd4+ 11. Kc4 Nf5 12. Kc3 Nd6 13. Ne6 Ne8
14. Nd4 Nf6 15. Be6 Kb1 16. Ne2 Ne4+ 17. Kd4 Nd2 18. Kd3
Nf3 19. Bd5 Nh2 20. Kc3 Ng4 21. Kb3 Ka1 22. Be4 Nf6 23. Bf5
Ne8 24. Nd4 Ng7 25. Bg4 Ne8 26. Bh5 Nd6 27. Bg6 Nb5
28. Nc2+ Kb1 29. Kc4 Nc7 30. Nb4+ Kb2 31. Nd3+ Ka3 32. Nc5
Kb2 33. Bf5 Ne8 34. Ne4 Ng7 35. Bg4 Kc2 36. Nd6 Kb2 37. Kd5
Kc3 38. Nb5+ Kb3 39. Nc7 Kb4 40. Kd6 Kc4 41. Ke7 Kc5
42. Na8 Kd4 43. Kf8 Nf5 44. Bxf5 Ke5 45. Bc2 Kd4 46. Bh7
Kc4 47. Nc7 Kb3 48. Ne6 Kb2 49. Ke7 Kc3 50. Kd6 Kc4 51. Kc6
Kc3 52. Kc5 Kb3 53. Kd4 Kb2 54. Nc5 Ka2 55. Kc3 Ka1 56. Bc2
Ka2 57. Nb3 Ka3 58. Bb1 Ka4 59. Nd4 Ka5 60. Be4 Kb6 61. Ne6
Kb5 62. Kb3 Ka5 63. Bg6 Kb5 64. Be8+ Ka5 65. Ka3 Kb6
66. Ka4 Ka6 67. Bb5+ Kb6 68. Kb4 Ka7 69. Ka5 Kb7 70. Bd7
Ka7 71. Nc5 Kb8 72. Kb6 Ka8 73. Bh3 Kb8 74. Na6+ Ka8
75. Bg2# *

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