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Subject: Re: Mate in 16 mystery

Author: Dieter Buerssner

Date: 19:09:34 09/05/03

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On September 05, 2003 at 22:03:02, Christophe Theron wrote:

>I seem to remember that Genius 3 and Genius 5 have a 32 plies absolute limit.
>
>I assume that Genius 7 has the same limit.
>
>It can see *SOME* mate in 16 (33 plies deep)

Why do you think, a mate in 16 is 33 plies deep?

Mate in 16 has a 31 (not 33) plies long PV. Perhaps an engine will need 32 ply,
to see that it is mate. Of course, with pruning, things will be different. But I
would guess the limit for a mate with a maximum ply of 32 for most engines
should be 16 and not less.

Regards,
Dieter




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