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

Author: Tansel Turgut

Date: 13:08:12 12/04/04

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On December 04, 2004 at 14:23:28, Eugene Nalimov wrote:

>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

Thanks Eugene,
it is extremely difficult to find so many "only moves" for either side. is there
a way i can make my own tablebases for this position?

best regards,
Tansel



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