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Subject: Re: Hiarcs 7.32 and mate announcements

Author: blass uri

Date: 00:33:03 07/14/99

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On July 14, 1999 at 03:19:57, Shep wrote:

>On July 14, 1999 at 01:05:25, Terry Ripple wrote:
>
>>On July 13, 1999 at 23:42:00, Brett Clark wrote:
>>
>>>On July 13, 1999 at 17:30:10, John Wentworth wrote:
>>>
>>>>I have had some games where Hiarcs will first announce mate in 3, then on it's
>>>>next move it announces mate in 5, then back to 3, back up to 6 etc etc. I
>>>>thought when it announced a mate in X number of moves, the moves were forced.
>>>>Doesn't appear that way though. Has anyone else had this problem of am I
>>>>interpreting it wrong?
>>>
>>>
>>>I've had the same problem.  Once, it announced mate in 9, then on the opponent's
>>>next move, it came back with an eval. of about +8.50 with no mate announcement.
>>
>>-------
>>In several of my computer vrs computer matches, i seen Hiarcs announce Mate7-
>>and this was 5-min. Blitz and was correct by its evaluation. I didn`t experience
>>this problem that you are saying, as yet!
>
>Actually, this problem can be observed in quite a lot of chess programs (Junior,
>Fritz, Chess Tiger [rarely] etc.).
>Maybe it has something to do with null-move (?).

Junior is not a null mover and crafty is a null mover so it has nothing to do
with null move.

I do not think it happens very often to Junior.
It is more common with Fritz from my experience in engine-engine games.

Uri



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