Author: Robert Hyatt
Date: 19:02:16 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. > >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? > >Will Nope... the PV isn't the only place they cause problems... you can miss finding a new best move because of such problems. But I basically ignore them as deeper searches tend to minimize the impact, and the extra depth you get by doing them more than pays for that... you get mistakes, but you find more. I consider it an overall significant gain...
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