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Subject: Re: Relatively simple position but not for Rybka

Author: Uri Blass

Date: 06:06:19 12/23/05

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On December 23, 2005 at 08:54:06, Vincent Lejeune wrote:

>On December 23, 2005 at 08:47:15, piet de hoop wrote:
>
>>Sorry forgot:
>>
>>black to play and white wins
>
>So , all moves are losing for black ! What to find ?

This is the right position when rybka has problems

[D]1r6/3N4/8/p5p1/k5P1/P7/1K2B3/8 w - - 0 1 bm Bb5+

Rybka is too aggresive with null move pruning so it does not find Bb5+ because
it does not analyze Bb5+ Rxb5 Ka2

Uri



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