Author: Peter Fendrich
Date: 13:03:58 11/19/98
Go up one level in this thread
On November 19, 1998 at 15:43:56, Will Singleton wrote: >All, > >I am using a null-move error finder that works like this: if a null move causes >a beta cutoff, I set a flag instead of returning the null move score. If the >regular search then doesn't cause a cutoff, it's a failure. I hope I understood this right: You are using this function as a "debugging" tool and not in your ordinary search engine, or...? > >This happens in several of the wac positions, causing problems. One solution >I've heard of is to disallow null moves in the principle variation. Since I >generally ignore the pv during the search, I'd have to do a fair amount of >coding to test this. > >Does restricting null moves in the pv guard against null-move failures? No it doesn't. A null move error might be the reason why a variation didn't became the pv in the first place and that doesn't change with this restriction. Another problem with this is that the pv and it's branches take up most of the search time. The null move approach is most valuable right here! //Peter > >Will
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