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Subject: Re: A test position(perpetual check),chessmaster and Fritz have problems

Author: Ricardo Gibert

Date: 11:23:17 10/22/00

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On October 21, 2000 at 09:27:22, James T. Walker wrote:

>On October 21, 2000 at 05:28:14, Uri Blass wrote:
>
>>I composed this position to see if chessmaster can see perpetual check.
>>
>>[D]4k3/6RQ/6PP/8/r7/8/r7/7K b - - 0 1
>>
>>The target is to see 0.00 score
>>
>>I found that chessmaster does not see the draw even after some minutes but after
>>Ra1+ Kg2 it can see the draw very quickly in clearly smaller depth.
>>
>>The same after Ra1+ Kh2
>>
>>I tried also Fritz5.32 and it does not see the draw at least after a short time.
>>
>>If I give Fritz5.32 the moves  Ra1+ Kg2 it can see the draw but after Ra1+ Kh2
>>it has problems to see the draw.
>>
>>Fritz5.32 expects Kg2 when it plays Ra1+ and wants to play Kg2 at depth 13 with
>>evaluation 0.00.
>>
>>How many squares can the white king visit before the repetition?(it is clear
>>that the white king cannot visit all the 21 squares (b1-b3... h1-h3))
>>
>>Uri
>
>Hello Uri,
>Why can't the White King visit all 21 squares?  If the King takes the pattern of


>h2,g1,[g2],f1,(f2),e1,{e2},d1,*d2*,c1,$c2$,b1,b2,b3,b2,c3,$c2$,d3,*d2*,e3,{e2},f3,(f2),g3,[g2],h3,h2,h1,[g2],f1,(f2),e1,{e2},d1,*d2*,c1,$c2$,b1,


>it has visited all 21 squares and taken 38 moves without hitting the same square
>3 times.  What did I miss?
>Jim

You visit the c2, d2, e2, f2, & g2 3 times. See my other post for my solution.



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