Author: Uri Blass
Date: 06:20:41 07/20/02
Go up one level in this thread
On July 20, 2002 at 08:38:52, Sune Fischer wrote: >On July 20, 2002 at 08:13:44, Gian-Carlo Pascutto wrote: > >>On July 20, 2002 at 08:04:01, Sune Fischer wrote: >> >>>I think it matters "a factor of 2". >>> >>>1) it helps you to prune >>>2) you get better evaluation in the upper plies when you can return a score >>>based on a deeper search. >>> >>>number one will show itself directly because you iterate deeper, the second one >>>you don't "see", but it does improve depth along some branches in the same way. >> >>1) I get +- 10% hash hits (and less prunes) in typical middlegame. Not enough to >>matter a factor of two (but I didnt check this so not 100% sure). >> >>2) Uh? > >You have 1 ply to go, you probe and get a hit based on a 10 ply search. > >Or, what is perhaps more likely, a 6 ply result when you only had 4 plies to go, >that is still 2 more plies of accuracy and you also prune/transpose at the same >time. I doubt about the accuracy. You may remember a draw score and use it when practically it is not a draw because the draw score is based on previous positions and when you get the same position again the previous positions are not the same. Uri
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