Author: Inmann Werner
Date: 08:03:09 11/20/98
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On November 20, 1998 at 09:35:46, Robert Hyatt wrote: >On November 20, 1998 at 06:28:01, Inmann Werner wrote: > >> >>Do you really make null moves in the PV. How do you manage, that Null moves do >>not get into the PV? >> >>Werner > > >Because when we do the null-move search, if it fails high we return beta >which means it *can't* get into the pv (failed high). If it doesn't fail >high, we ignore it and do a normal search, which means something else will >get into the pv with the null-move being ignored totally. Thanks a lot, Robert and Peter!!!! This was one of the most simple and good tips, I got!!! I now use null move also in the PV, had to change only one variable in my program and my search tree is reduced by 40%!!!! (tested with 4 positions) It must be some brain-damage of me, why I did not recognize this of my own. There you go looking for speed increasments of 2 to 5 percent, and here you get a lot of this as simple! Thanks again Werner
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