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Subject: Re: Why Tiger calls it Mate in 25?

Author: Jeff Lischer

Date: 18:00:50 04/19/01

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On April 19, 2001 at 10:23:47, Robert Hyatt wrote:

>
>Somebody's confused somewhere.  It is a mate in 26 starting with Ne4.  IE
>counting Ne4, white needs exactly 26 moves to force mate.  What's with all
>the other numbers these programs are getting???

I did some experimenting Tiger and it seems that Tiger rounds down! If the mate
is in 1 ply (or 0.5 moves) Tiger calls it Mate in 0. Tiger calls mate in 2 plies
(1.0 moves) Mate in 1. And so on. Since the position above is mate in 51 plies
(25.5 moves), Tiger calls it Mate in 25. :)

I don't know about the other programs.



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