Author: Ricardo Gibert
Date: 20:17:32 10/29/03
Go up one level in this thread
On October 29, 2003 at 22:16:59, macaroni wrote: >I don't know if this has been done, probobly has, but here goes anyway. Lets say >the computer gets to this position somewhere in it's search. > >[D]2k2q2/pp4pp/2p5/2p1p3/5n2/1NP4P/PP3PP1/2Q3K1 w - - > >white to move is ok, but when the search nullmoves, black wins with Ne2+!!. Ok, >my idea (and probobly loads of other peoples), is to store this move, Ne2+, >since for alot of whites possible moves, Ne2+ still wins the queen. I'm not >quite sure how the code would work, or how effective this would be. Maybe you >wouldn't want to store it if it were a capture? as they are checked early >anyway. You could possibly store it as a killer move? I don't know. If it has >already been done, can people tell me how effective it is? if at all. It can be quite effective as you have correctly guessed. However, the killer move heuristic works independently of nullmove. See http://www.fierz.ch/strategy2.htm > >I have heard of mate threat extensions...does that use null move to? I don't know much about that, but I would assume it is incorporated independently of nullmove too.
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