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Subject: Re: A Rykba bug ?

Author: David Dahlem

Date: 18:33:36 12/23/05

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On December 23, 2005 at 20:56:51, Djordje Vidanovic wrote:

>On December 23, 2005 at 20:35:34, Arnon Yogev wrote:
>
>>Kh7 is the only playable move.
>>
>>[D]2r4k/6p1/6N1/p6p/P7/1B6/1KP4r/2B5 b - - 0 45
>>
>>Rybka (beta version) can't analyse this position(no PV).
>>
>>1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5.
>>Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Nb3 Be7 9. Qf3 h6 10. Bh4 Qc7 11. O-O-O Nbd7 12.
>>a4 b6 13. Bd3 Bb7 14. Bg3 O-O 15. Rhe1 Nc5 16. Nxc5 bxc5 17. Bc4 Qb6 18. f5
>>exf5 19. Qxf5 Qb4 20. Bb3 c4 21. Rd4 Rac8 22. h4 Rc5 23. Qf1 Rfc8 24. Ba2 a5
>>25. Rxd6 Nh5 26. Bh2 Bxh4 27. Red1 Bf6 28. e5 Bg5+ 29. Kb1 Rb8 30. e6 fxe6 31.
>>Rd7 Nf4 32. Bxf4 Bxg2 33. Rd8+ Bxd8 34. Rxd8+ Rxd8 35. Qxg2 Rh5 36. Qe4 Kh8 37.
>>Bc1 Qc5 38. Qxe6 Rh1 39. Ne2 c3 40. Bc4 cxb2 41. Kxb2 Rh2 42. Bb3 Qc8 43. Qxc8
>>Rxc8 44. Nf4 h5 45. Ng6+ *
>>
>>AY.
>
>
>This has been fixed in the later Betas:
>
>New game,
>2r4k/6p1/6N1/p6p/P7/1B6/1KP4r/2B5 b - - 0 1
>
>Analysis by Rybka 1.01 Beta XX 32-bit:

What is this Rybka 1.01 Beta XX and where did you get it? Mine is called Rybka
1.01 Preview 2, and i wouldn't call it a beta, since i paid for it. :-)

Regards
Dave

>
>1...Kh7
>  -+  (-2.17)   Depth: 3   00:00:00
>1...Kh7
>  -+  (-1.98)   Depth: 4   00:00:00
>1...Kh7 2.Ne7
>  -+  (-1.97)   Depth: 5   00:00:00
>1...Kh7 2.Ne7 Re8
>  -+  (-2.05)   Depth: 6   00:00:00  4kN
>1...Kh7 2.Ne7 Re8 3.Bf4
>  -+  (-2.23)   Depth: 7   00:00:00  6kN
>1...Kh7 2.Ne7 Re8 3.Bf4 Rf2
>  -+  (-2.01)   Depth: 8   00:00:00  11kN
>1...Kh7 2.Ne7 Re8 3.Bf4 Rf2 4.Bg3
>  -+  (-2.06)   Depth: 9   00:00:00  21kN
>1...Kh7 2.Ne7 Re8 3.Bf4 Re2 4.Nd5 h4
>  -+  (-2.13)   Depth: 10   00:00:00  39kN
>1...Kh7 2.Ne7 Re8 3.Bf4 Rf2 4.Bg3 Rf3 5.Bh4
>  -+  (-2.25)   Depth: 11   00:00:00  137kN
>1...Kh7 2.Ne7 Re8 3.Bf4 Rg2 4.Nc6 h4 5.Bf7 Ree2
>  -+  (-2.33)   Depth: 12   00:00:01  228kN
>1...Kh7 2.Ne7 Re8 3.Bf4 Rg2 4.Nc6 h4 5.Bf7 Ree2 6.Bd5
>  -+  (-2.19)   Depth: 13   00:00:01  361kN
>1...Kh7 2.Ne5 h4 3.Nf3 Rh1 4.Be3 h3 5.Bd5 Rd1 6.Be6 Re8
>  -+  (-2.49)   Depth: 14   00:00:06  1547kN
>1...Kh7 2.Ne5 h4 3.Nf3 Rh1 4.Bd2 h3 5.Be6 Rb8+ 6.Kc3 Kg6 7.Ne5+ Kf6 8.Bd5
>  -+  (-2.51)   Depth: 15   00:00:11  2563kN
>1...Kh7 2.Ne5 h4 3.Nf3 Rh1 4.Bd2 h3 5.Be6 Rb8+ 6.Kc3 Kg6 7.Ne5+ Kf6 8.Bd5
>  -+  (-2.62)   Depth: 16   00:00:18  4223kN
>
>(Vidanovic, Home 24.12.2005)



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