Author: Robert Hyatt
Date: 11:26:50 01/14/98
Go up one level in this thread
On January 14, 1998 at 11:31:08, Mike Byrne wrote: >On January 14, 1998 at 08:49:27, Dan Homan wrote: > >>On January 13, 1998 at 14:43:16, Robert Hyatt wrote: >> >>>On January 13, 1998 at 09:08:49, Dan Homan wrote: >>>> >>>>p.s. My program does >>>> >>>>capture extensions (4/10 of a ply) >>> >>>dangerous one there. Ken Thompson used 1/2 ply in 1983, and probably >>>lost the 1983 World Championship as a result of doing this. He reported >>>it helped his WAC results quite a bit, but it costs about 1/2 to 1 ply. >>>He later discarded it totally. >>> >>> >>>>re-capture extensions (1 ply) >>>>check extensions (1 ply) >>>>pawn push extensions (1/2 ply or 1/3 ply) (endgame and late >>>>middle-game) >>>>bruce's mate ext. (1 ply) >>> > >what is "bruce's mate ext. (1 ply)" ? The trick of checking the value returned by the normal null-move search, and if it says "mated in N moves" extend by some amount, since a position where you do nothing and get mated obviously has a strong threat somewhere...
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