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Subject: Re: mate threat extension/null move

Author: Stuart Cracraft

Date: 21:09:10 09/25/04

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On September 25, 2004 at 16:08:10, Zach Wegner wrote:

>>But doesn't returning -MATE+ply from search() mean that the program
>>might postpone making a mate since it is not returning -MATE+depth
>>and so the ply is increasing and so more credit for deeper mates
>>whereas depth is decreasing so more credit for more shallow mates?
>No, because we want the value to be smaller for being mated closer (it is worse
>to be mated sooner). From the other side's point of view, the score is MATE -
>ply. We want ply to be smallest (close to the root) so that this value is closer
>to mate.

Good explanation. I've reverted to -MATE+ply and see that of course you
are right.

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