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Subject: Very curious Shredder 8 bug

Author: Mike Hood

Date: 06:54:00 02/18/04

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.

• This Position Has Never Occured in the Thousands of Yrs of Chess. Timothy J. Frohlick 10:20:46 02/19/04
  • Re: This Position Has Never Occured in the Thousands of Yrs of Chess. William Penn 11:56:16 02/19/04
    • Re: This Position Has Never Occured in the Thousands of Yrs of Chess. Uri Blass 12:11:20 02/19/04
      • Re: This Position Has Never Occured in the Thousands of Yrs of Chess. William Penn 21:36:53 02/19/04
• Re: Very curious Shredder 8 bug-confirmed William Penn 22:13:46 02/18/04
  • Re: Very curious Shredder 8 bug-confirmed Mike Hood 03:01:49 02/19/04
• Re: Very curious Shredder 8 bug Anthony Cozzie 08:25:47 02/18/04
  • Re: Very curious Shredder 8 bug Gilles Garrigues 10:18:40 02/18/04
  • No bug at all! Ingo Bauer 09:26:39 02/18/04
    • Re: Yes it is a bug! Look more carefully! Mike Hood 10:29:38 02/18/04
      • how about kknbw.emd and kknbb.emd? William Penn 16:19:50 02/18/04
      • Re: Yes it is a bug! Look more carefully! Ingo Bauer 11:00:13 02/18/04
        • Re: Yes it is a bug! Look more carefully! Ingo Bauer 11:07:47 02/18/04

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