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Subject: Re: Test - The Hidden Secret of the Chain

Author: Sune Larsson

Date: 08:18:58 02/27/01

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On February 27, 2001 at 11:02:34, Ricardo Gibert wrote:

>On February 27, 2001 at 10:14:04, Sune Larsson wrote:
>
>>
>>  [D]r7/7k/5R2/p3p3/Pp1pPp2/1PpP1Pp1/K1P3P1/8 w - - 0 1
>>
>>
>>  White to move and make it for the draw. Normal play like 1.Rf5? Kg6!
>>  2.Rxe5 Rh8! followed by Rh2 gives the full point to black. 1.Re6? makes
>>  no difference after 1.-Rh8! But the pawnchain carries some hidden secrets...
>>  To be honest, this is more a test of one's own limitations of the mind.
>>  I think it's too difficult for any chessprogram (but who knows?. Then
>>  again, it's possible to test the programs when 1/3,1/2 or 2/3 of the
>>  solution is performed. A human can solve it by trial and error. If
>>  normal play doesn't work, one is forced to think in new patterns...
>>
>>  Sune
>
>Cute problem. Yes, it looks too difficult for computers: 1.Kb1! Kg7 (or 1...Rh8
>2.Rf8!) 2.Rh6! Kxh6 and White has bought enough time to get his King into
>position 3.Kc1 Kg5 4.Kd1 Rh8 5.Ke2 drawing due to a stalemate theme.

 Yes, and then there is another one to check out, when black takes on g2 -
 following your line - 5.-Rh2 6.Kf1 Rxg2 7.Kxg2 Kh4 8. Kg1! and black can
 make no progress. Buying time instead of chopping wood...;)

 Sune



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