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Subject: Re: Depths equivalences

Author: Tord Romstad

Date: 04:55:16 04/22/98

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On April 21, 1998 at 13:01:08, Christophe Theron wrote:
>I did not try your position yet. Anyway I'll do it.
>
>But before that, I want to mention something I noticed with Genius: it
>is able to evaluate sometimes that a position is a mate in 1 without
>having to do the mate move. It is the case in very obvious mate
>situations were you can just mate by putting your queen near a trapped
>king. If you find this situation, you know it is a mate in 1, and you
>don't need to verify that by moving your queen and then try to move the
>king out of check.
>
>I don't know if this mate detection algorithm has been improved in
>recent versions, but it could be the explanation: Genius does not need
>to see the 21th ply to find the mate, because it knows it is mate in 1
>just by looking at the position at the 19th or 20th ply.

I don't think that is the explanation here. If I remember right, Genius
4
finds the mate at depth 3/15, Genius 5 at depth 4/16. I find it hard to
believe that Genius can discover a mate five or six plies in advance...

Tord



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