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Subject: Re: How many programs can select the 1......h6! drawish move ?

Author: Robert Hyatt

Date: 05:55:07 05/06/03

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On May 06, 2003 at 07:05:02, Jarkko Pesonen wrote:

>Crafty 19.3 ends up in this position
>    white       black
>  1  d5          e5
>  2  c6+         bxc6
>  3  bxc6+       Kc8
>  4  d6          e4
>  5  Kd4         h5
>  6  g4          hxg4
>  7  hxg4        f4
>  8  Kxe4        ...
>
>[D]2k5/8/2PP4/6p1/4KpP1/8/8/8 b
>
> 21->   1:40   6.47   1. ... Kd8 2. Kd4 Kc8 3. Kd3 Kd8 4.
>                     Ke4 Kc8 5. Kf3 Kd8 6. Kf2 Kc8 7. Ke2
>                     Kd8 8. Kd3 Kc8 9. Kc3 Kd8 10. Kd2 Kc8
>                     11. Ke1 f3
>
>Seems that crafty isn't doing any progress and score is totally wrong(seems to
>be draw).
>
>Is there an easy way to fix this?
>Or is this some kind off odd situation that is so rare that it is not
>worth fixing?
>
>Jarkko


That can be fixed.  It is the classic problem of two connected passed pawns
being valued too high in a king and pawn ending.  If they were separated,
white would win easily.  But together, they can be stopped.  I will look
at this and fix it.  The code is already there, it just has a hole that I
apparently overlooked.





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