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Subject: Re: Help needed: How can I search a 6 piece position by Nalimov tablebases?

Author: Eugene Nalimov

Date: 11:23:28 12/04/04

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On December 03, 2004 at 23:30:38, Tansel Turgut wrote:

>I am looking for the evaluation of a specific 6 piece ending position. It is not
>in the available tablebases.
>
>I entered the position on lokosoft website. It says that this position is not
>analyzed.
>
>Does anyone know how I can analyze this position? How can I create a specific
>kind of analysis tool to analyze this position?
>
>The position:
>8/7B/8/n5k1/8/2P5/7P/6K1 b - -
>
>is this a draw (with wrong colored bishop+ pawn)? can black sacrifice his knight
>for the c3 pawn?
>
>best regards,
>Tansel Turgut

Here are results from (old) Crafty running on slow system.

C:\temp\Crafty>wcrafty

Initializing multiple threads.
System is SMP, not NUMA.
unable to open book file [./book.bin].
book is disabled
unable to open book file [./books.bin].

Crafty v19.11 (1 cpus)

White(1): tbpath n:\42p;k:\32;k:\41;k:22;k:\21;k:\31
6 piece tablebase files found
199611kb of RAM used for TB indices and decompression tables
White(1): 8/7B/8/n5k1/8/2P5/7P/6K1 b - -
1. ... Nc4! 2. Bd3! Nb2 3. Be2! Kh4! 4. Kg2! Na4! 5. c4! Nc5! 6.
Bf1 Nb3! 7. Kg1! Kg4 8. Bg2! Kf4! 9. Kf2! Nc1! 10. Ke1! Nb3! 11.
Kd1! Nc5! 12. Ke2 Na4 13. Bf3 Nc3+! 14. Kf2! Na4! 15. Be2! Nc3 16.
Ke1 Na4 17. h4! Nc5 18. h5! Kf5 19. Kf2 Nb3 20. Bg4+ Kf6! 21. Ke3!
Nc5 22. Kd4! Nb7! 23. Kd5! Kg5! 24. Ke5! Nc5 25. Bf3! Kh6! 26. Kd6
Nb3 27. Kd5! Nc1! 28. Be4! Na2! 29. c5! Nb4+! 30. Kd4 Na6! 31. c6!
Kxh5! 32. Bd5 Nc7 33. Bc4 Na8 34. Ke5 Kg4 35. Kd6! Kf3 36. Ba6! Ke3!
37. Bb7! Nb6! 38. c7! Kd4! 39. Ba6! Ke4! 40. Kc5! Nd7+! 41. Kb5 Ne5
42. c8=Q Nd3 43. Bb7+ Kf4! 44. Qd8 Nc1 45. Qc7+ Kg4 46. Qxc1 Kf5!
47. Bc8+ Ke4 48. Qg1 Kd3 49. Qe1! Kc2 50. Bf5+ Kb2 51. Kb4 Ka2 52. Qb1#

Thanks,
Eugene



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