Author: James B. Shearer
Date: 14:08:01 01/12/98
Go up one level in this thread
On January 11, 1998 at 10:45:20, Robert Hyatt wrote:
>On January 11, 1998 at 08:51:06, Carsten Kossendey wrote:
>
>>On January 11, 1998 at 01:07:46, Stuart Cracraft wrote:
>>
>>>Someone on this newsgroup wrote about a useful extension
>>>that went something like "If the null move search returns
>>>a mate score, e.g. n moves to mate, then extend."
>>
>>If you use recursive null moves, you will want to limit it to small N's
>>since otherwise you start extending lines where your opponent moves 6
>>times in a row or something, and even the most quiet positions look like
>>mates then ;)
>>
>
>I do recursive null-move, but *never* two null-moves back to back, so
>that
>this isn't a problem.
But two nulls moves in a row by the same side are not considered
back to back are they? So this is not really to the point. However 6
moves in a row by the same player means a search depth of 21 (6 plys
for the moves, 15 (3*5) plys for the 5 null moves) so this should not
be a big problem.
James B. Shearer
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