Author: Charlie GOLD
Date: 10:32:12 03/20/99
Go up one level in this thread
On March 20, 1999 at 11:45:28, Bruce Moreland wrote:
>The database for this ending has been generated by others recently, but to my
>knowledge nobody has posted anything about it.
>
>The longest mate for white (the side wth the pawns) is 50 moves, but there is
>also several mates in 17 for the side with the knight.
>
>bruce
>
>---------------
>[Event "?"]
>[Site "?"]
>[Date "????.??.??"]
>[Round "?"]
>[White "?"]
>[Black "?"]
>[Result "1-0"]
>[SetUp "1"]
>[FEN "4n3/2P5/8/8/1P2K3/8/7k/8 w - - 0 1"]
>
>{
> a b c d e f g h
> +---+---+---+---+---+---+---+---+
>8 | |///| |///| n |///| |///| 8
> +---+---+---+---+---+---+---+---+
>7 |///| |/P/| |///| |///| | 7
> +---+---+---+---+---+---+---+---+
>6 | |///| |///| |///| |///| 6
> +---+---+---+---+---+---+---+---+
>5 |///| |///| |///| |///| | 5
> +---+---+---+---+---+---+---+---+
>4 | |/P/| |///| K |///| |///| 4
> +---+---+---+---+---+---+---+---+
>3 |///| |///| |///| |///| | 3
> +---+---+---+---+---+---+---+---+
>2 | |///| |///| |///| |/k/| 2
> +---+---+---+---+---+---+---+---+
>1 |///| |///| |///| |///| | 1
> +---+---+---+---+---+---+---+---+
> a b c d e f g h
>}
>
>1. c8=N! Nc7 2. Ke5 Kg3 3. Kd6 Nb5+ 4. Kc5! Nc7 5. Kc6 Ne6 6. Kd6 Nd4 7. Kd5
>Nb5 8. Nd6 Nc7+ 9. Kc6! Ne6 10. Nb5 Kg4 11. Nc7 { Kd5 } Nd4+ 12. Kd5 Ne2 13.
>Ke4! Nc3+ 14. Kd3! Nd1 15. b5 { Kd4 } Nb2+ 16. Kd4! Na4 17. Na8! Kf5 18. Kc4!
>Ke6 19. Kb4! Nb2 20. b6! Nd3+ 21. Kb5! Ne5 22. b7! Nd7 23. Nb6 { Kc6 } Nb8 24.
>Nc8 { Kc5 } Nd7 25. Kc6 Nb8+ 26. Kb6 Kd7 27. Ka7 Kc7 28. Ne7 Nd7 29. Ng6
>{ Nd5+ } Kc6 30. Ne5+ { Nf8 } Nxe5 31. b8=Q! Nd7 { Kd5 } 32. Qf4 { Qg3, Qh2,
>Qb7+, Qb4, Qb3, Qb2, Qb1, Qa8+, Qc8+, Qd8, Qe8, Qg8, Qh8 } Kd5 33. Qd2+ { Ka6,
>Kb7 } Ke6 34. Ka6 { Kb7 } Nf6 { Nb8+, Ne5, Nc5+, Ke7 } 35. Kb5 { Kb6 } Nd7
>{ Ne4 } 36. Qc3 { Qh6+, Qd1, Kc4, Kc6, Kb4 } Nf6 { Ne5, Kd6 } 37. Kc4 Ne4
>{ Kf5 } 38. Qe1 { Qe3 } Kf5 39. Kd4 Nf6 40. Qe5+ Kg6 41. Qf4 Kg7 42. Qd6 { Qf5,
>Ke5 } Nh5 { Nh7, Ng8, Kf7 } 43. Ke5 Kf7 44. Qd7+ { Qh6 } Kf8 45. Kf5 Kg8 46.
>Qe8+ { Qe7, Kg5 } Kh7 { Kg7 } 47. Qf7+ { Qxh5+, Kg5 } Kh8 48. Kg6 { Kg5 } Nf4+
>49. Qxf4 { Kh6 } Kg8 50. Qb8# 1-0
>
>[Event "?"]
>[Site "?"]
>[Date "????.??.??"]
>[Round "?"]
>[White "?"]
>[Black "?"]
>[Result "0-1"]
>[SetUp "1"]
>[FEN "K1kn4/8/8/8/8/8/P1P b - - 0 1"]
>
>{
> a b c d e f g h
> +---+---+---+---+---+---+---+---+
>8 | K |///| k |/n/| |///| |///| 8
> +---+---+---+---+---+---+---+---+
>7 |///| |///| |///| |///| | 7
> +---+---+---+---+---+---+---+---+
>6 | |///| |///| |///| |///| 6
> +---+---+---+---+---+---+---+---+
>5 |///| |///| |///| |///| | 5
> +---+---+---+---+---+---+---+---+
>4 | |///| |///| |///| |///| 4
> +---+---+---+---+---+---+---+---+
>3 |///| |///| |///| |///| | 3
> +---+---+---+---+---+---+---+---+
>2 | P |///| P |///| |///| |///| 2
> +---+---+---+---+---+---+---+---+
>1 |///| |///| |///| |///| | 1
> +---+---+---+---+---+---+---+---+
> a b c d e f g h
>}
>
>1. ... Nc6! 2. a3 { c3 } Kc7! 3. a4 { c3 } Kb6 { Kc8 } 4. a5+ { c3 } Kc7! 5. a6
>{ c3 } Ne5 { Nb8, Kb6, Kc8 } 6. c3 { Ka7 } Nc4 { Nc6, Nd7 } 7. Ka7 Nb6 8. c4
>Nd7 9. Ka8 Kb6 10. c5+ Kc6! 11. Ka7 Kc7! 12. Ka8 Ne5 13. Ka7 Nc6+ 14. Ka8 Kc8
>15. a7 Ne5 { Na5, Ne7, Nd4, Nb4, Nd8 } 16. c6 Nc4! 17. c7 Nb6#! 0-1
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