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

Author: Vincent Lejeune

Date: 16:46:58 03/26/05

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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 :

[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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