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Subject: Re: Test position from Martin Fierz homepage

Author: Vasik Rajlich

Date: 10:05:35 08/16/04

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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.

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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