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Subject: Re: Weird, why cant Deep Fritz8,Hiarcs9 find this mate in 3?

Author: Roman Hartmann

Date: 01:08:22 12/31/05

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On December 31, 2005 at 03:55:39, Uri Blass wrote:

>On December 31, 2005 at 03:34:04, Kurt Utzinger wrote:
>
>>Please post the FEN string of the position
>>you are talking about. Many thanks in advance.
>>Best regards
>>Kurt
>
>[D]7n/5p2/5Np1/5pP1/5pbB/5k2/5Pr1/3K3B w - - 0 1
>
>of course this is zugzwang problem and some null movers can see nothing here.

Yes, thats definitely a null move problem here. You can check this by disabling
null move (i.e. with crafty).

>1.Ke1 Bh3 2.Kf1 Bg4 3.Bxg2#
>
>I believe that most of the programs can find it.
>
>I tested 16 engines
>
>6 could not see the mate:
>
>1)Crafty19.19
>2)Fritz6 Light
>3)Fruit2.1
>4)Glaurung Mainz
>5)Rybka1.0 beta32bit
>6)TogaII0.93

the following engines don't find the mate either:
List 512
Fritz 5.32
Fritz 9
Aristarch

Roman

>10 could see the mate:
>1)Comet
>2)Fritz8
>3)Fruit2.2
>4)GambitFruit1.0beta4x
>5)Junior7
>6)prodeo1.0
>7)Shredder9
>8)Toga1.1
>9)Yace
>10)Movei
>
>
>I am surprised if Deep Fritz8 cannot find it because my fritz8 has no problem to
>find it.
>
>Uri



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