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Subject: Re: Test position from Martin Fierz homepage

Author: Martin Giepmans

Date: 11:40:34 08/16/04

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On August 16, 2004 at 13:05:35, Vasik Rajlich wrote:

>On August 16, 2004 at 08:46:12, Vincent Lejeune wrote:
>
>>I found this position here http://www.fierz.ch/pontresina.htm , after I searched
>>10 min with no board and then 10 with a board and then 20 with chessengine, I
>>gave up ... is this position buggy ??
>>
>>pasting :
>>
>> A cool (and very instructive) position which occurred in round 5: black to move
>>and win! This one is harder than you think :-)
>>Click here for a hint!
>>The obvious 1... c4+ only draws. To win, you need to know something about
>>'corresponding squares'.
>>
>>[d]8/8/4p2p/1kp1P1p1/1p4P1/1P1K2P1/7P/8 b - - 0 1
>
>That is a cool anti-computer problem! White's possibilities with the h-pawn will
>keep any engine from getting it.
>
>Try putting the white h2 pawn on h5 and with a reasonable hash table any engine
>should handle it.

I guess that you mean h4 instead of h5? With the white h2 pawn on h5 the obvious
move (c4) is a clear win. A least that's what my engine thinks. Score jumps to
approx. + 20 within a few seconds, so unless I have a huge bug ... :)

Martin


>
>As for the correspondences, start with
>
>b5 & d3 (else .. c4)
>c6 & e4 (else .. kd5)
>
>and it's easy from there ...
>
>Vas



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