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Subject: Re: Very curious Shredder 8 bug

Author: Anthony Cozzie

Date: 08:25:47 02/18/04

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On February 18, 2004 at 09:54:00, Mike Hood wrote:

>Shredder 8 gives the following information in "infinite analysis" mode, even
>though I have all the 3/4/5-piece tablebases.
>
>[D] 4k3/8/8/8/8/8/3q4/4K3 w - - 0 1
>
>Analysis by Shredder 8:
>
>1. = (0.00): 1.Kxd2
>2. = (0.00): 1.Kf1 Kf7
>
>We get a small clue what is happening, when we look at Fritz 8's analysis of the
>same position:
>
>Analysis by Fritz 8:
>
>1. = (0.00): 1.Kxd2
>2. -+ (-10.66): 1.Kf1 Kd7
>
>This is the analysis after 10 seconds. If I wait a few minutes Fritz finds a
>mate in 11. It looks like the tablebase engine goes on strike in positions which
>are a potential transition to K-K.

While Shredder 8 is probably the strongest engine currently available, there is
no question it is the buggiest.  I've seen more Shredder bug reports to this
forum than all other engines combined.

anthony



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