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Subject: Re: How long does it take your program to find this simple mate in 4?

Author: Colin Frayn

Date: 01:55:21 02/09/00

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On February 09, 2000 at 01:13:59, Dave Gomboc wrote:

>No, it can be a major problem.  This kind of thing locks your program into
>stasis.  I've seen Crafty do it in other positions too.

I know the problem.  Program spots a mate in x then plays a move, gets a reply,
and then spots a new mate in >=x still, so goes off and does that, then 2 ply
later spots a different mate in x.

However, I think Crafty will always check for that (I presume) in that if it has
found a mate in x then that will be flagged as so in the hashtable, so it'll
search no deeper than that.

If not then it shouldn't be a problem, because by the laws of probability,
there'll be a short mate sooner or later.  Provided you don't run out of time.

Cheers,
Col



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