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Subject: Re: Null move mate extension

Author: James Robertson

Date: 08:30:04 06/25/99

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On June 25, 1999 at 09:22:44, Robert Hyatt wrote:

>On June 25, 1999 at 02:29:45, James Robertson wrote:
>>I implemented the threat exension in the null move (if the null move returns
>>that we were mated, then extend), and I almost _never_ get any extensions this
>>way. Maybe 3 or 4 times in an entire search, if that many. How many is normal?
>>Do I have a bug? Any help is appreciated.
>What happens if you call Search(-500,-400,etc)?  Can you (from the next
>ply) return a value > -400, so that you can actually pass the MATE score
>back to the previous ply (fail-soft) or do you just return -400 (beta)
>which won't trigger the extension?

I think I smell a rat....


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