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Subject: Re: mate threat extension/null move

Author: Uri Blass

Date: 02:19:27 10/06/04

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On October 05, 2004 at 18:41:58, Stuart Cracraft wrote:

>On October 04, 2004 at 20:23:27, Don Beal wrote:
>
>>Hmmm.  It's very helpful to post the actual code.
>>My time is limited though.
>
>No problem -- you've made good comments and de-lurked
>and everyone enjoys that.
>
>The bet was to decrease the WAC #141 problem down to <= 10
>seconds without turning off the null move as one
>claimant had done.
>
>Although I am now at 49 seconds for WAC 141 solution with
>null move enabled and not limited compared to the earlier 95
>seconds, the <= 10 bet is still open. I'll hereby double the
>bet to $100 to the first person who helps me achieve it directly.

If you use mate threat extension(and if I understand correctly you use it) then
I suggest to limit it to the case when
the following conditions happens:
1)There is no another extension for the last 2 plies.
2)The side that threats the mate has not a big advantage of more than 2 pawns
and it means that the evaluation is better than 2 pawns against the side to
move.

I hope it can help you.

I believe that
these ideas also should be productive for real games.

Uri



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