Computer Chess Club Archives




Subject: Re: mate threat extension/null move

Author: Michael Henderson

Date: 11:49:29 10/07/04

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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.

Hi Stuart,

How do you handle mate scores (probe/store) in the hash table?  That is a tricky
concept sometimes and can lead to bugs :) Also, if you use "bounded" mate scores
in the hash table your scores will not be exact.  Exact mate scores are
necessary for the mate threat detection.


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