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Subject: Re: Fritz5 doesn't find this 'mate-in-2'!

Author: Ernst A. Heinz

Date: 01:14:26 06/18/98

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On June 17, 1998 at 19:53:24, Vincent Diepeveen wrote:

>
>On June 17, 1998 at 19:03:49, Djordje Vidanovic wrote:
>
>>On June 17, 1998 at 18:28:34, Helmut Winkler wrote:
>>
>>>8/8/6Q1/8/8/7k/3p1pp1/3Kbrrb w - -
>>
>>Crafty 14.8p6 does not find the mate either, the latest Winboard versions of
>>Comet and Patzer do so instantly... Don't know about the latest Crafties. It
>>seems that the problem is the old one, present in all the Fritzes so far -- the
>>null-move and the zugzwang...
>>
>>Regards,
>>
>>Djordje
>
>Of course not. It's a nullmove problem. I get kind of sick of this kind of
>problems. Everyone knows that fritz5 does use nullmove without
>zugzwang detection. so does crafty, so what is your problem
>Helmut?
>
>You don't need to test those problems even on it, know
>before you test the problem that it doesn't find it.
>
>Vincent.

No need for null-move zugzwang detection here -- "DarkThought" finds the
mate-in-2 instantly while performing aggressive null-move pruning without
any zugzwang detection ...

=Ernst=



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