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Subject: Re: How long to see black is winning + crafty bench

Author: Robert Hyatt

Date: 18:30:04 03/26/05

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On March 26, 2005 at 19:46:58, Vincent Lejeune wrote:

>On March 26, 2005 at 15:34:45, Dieter Buerssner wrote:
>
>>On March 26, 2005 at 15:29:42, Dieter Buerssner wrote:
>>
>>>On March 26, 2005 at 15:20:17, Mike Byrne wrote:
>>>
>>>>after the main line :  Kf2 f5 h3 Kc7 g3 hxg3 is winning no?
>>>>
>>>>Black(2): his
>>>>    white       black
>>>>  1  Kf2         f5
>>>>  2  h3          Kc7
>>>>  3  g3          ...
>>>>               17    25.52  -7.17   3. ... hxg3+ 4. Kxg3 f4+ 5. Kg4 b6
>>>>                                    6. h4 f3 7. Kxf3 gxh4 8. c6 Kxc6 9.
>>>>                                    Kg4 b5 10. a5 b4 11. Kxh4 Kb5 12. Kg4
>>>>
>>>
>>>In this line, Yace says 8. c6? is losing, while 8.cxb6 is draw.
>>
>>It is such an obvious blunder, that it looks like a bug in Crafty.
>>
>>Regards,
>>Dieter
>
>
>Probably a bug in the static eval of the pawn endgame. after 3 min@3 Ghz :

I can't reproduce Mikes PV with this "c6 bug"...  I don't get c6 at any point
that I can see, it always takes...

Any ideas?


>
>[D]8/2k5/1p6/2Pp4/P2P3p/5K2/8/8 w - - 0 1
>
>Analysis by Crafty 19.19:
>
>1. -+ (-6.69): 8.cxb6+ Rxb6 9.Rg4 Ra5 10.Rxh4 Rxa4 11.Rg4 Rb3 12.Rf3 Rc4 13.Re3
>Rc3 14.Re2 Rxd4 15.Rd2 Re4 16.Re2 d4 17.Rf2 Rd3
>2. -+ (-10.70): 8.c6 Rxc6 9.Rg4 b5 10.axb5+ Rxb5 11.Rxh4 Rc4 12.Rh5 Rxd4 13.Rg4
>Re3 14.Rf5 d4 15.Re5 d3 16.Rd5 d2 17.Re5 d1D 18.Re6



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