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Subject: Re: Only fruit finds the draw in this position

Author: Paul Jacobean Sacral

Date: 04:00:13 09/22/05

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On September 22, 2005 at 05:39:07, Mahesh Jeswin wrote:

>Only Fruit 2.1 seems to find the draw in this position without egtb.
>Any other engine comes close to finding the draw ?
>
>[D] 7k/7P/8/6N1/7K/8/8/8 w - - 0 1

I didn't find any! Good test position. At least engines which do not use egtb in
the search, should probably have code for that type of position, or a "no
progress" rule. Engines quickly reach depths of 20+ in this position. With a
material balance of +4 and no progress at all after 20 plies, it is most
probably a dead draw. I think that could be a "safe" rule, if the opponent has
only the king (maybe even 10 plies are enough already, in those cases).

Yours truly Paul J. Sacral



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