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

Author: Robert Hyatt

Date: 06:01:53 04/20/01

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On April 19, 2001 at 23:34:48, Chessfun wrote:

>On April 19, 2001 at 21:00:50, Jeff Lischer wrote:
>
>>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.
>
>You are correct Christophe has written on this here before.
>As for the others programs no idea why they had different #s to mate.
>I have all 3,4 and 5 men bases in one directory 7.05 GB.
>All programs ran for about one minute.
>
>Sarah.


7.05 sounds wrong.  I get this:

7411980

and I _know_ I have all the 3-4-5 piece files there...



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