Author: Robert Hyatt
Date: 08:14:24 11/21/02
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On November 21, 2002 at 10:15:47, Bernhard Bauer wrote: >Hi Omid, > >would you implement your pruning technique in crafty so the benefits could be >tested by everybody? >That way we would have the best comparison. >regards >Bernhard I am working on this. I'll certainly post the results when I get it to work right. It is a bit tricky if you try to do it cleanly... > >On November 20, 2002 at 11:43:10, Omid David Tabibi wrote: > >> >> ICGA Journal, Vol. 25, No. 3, pp. 153-161, September 2003 >> >> >> Verified Null-Move Pruning >> >> Omid David Tabibi and Nathan S. Netanyahu >> >> >> Abstract >> >>In this article we review standard null-move pruning and introduce our extended >>version of it, which we call verified null-move pruning. In verified null-move >>pruning, whenever the shallow null-move search indicates a fail-high, instead of >>cutting off the search from the current node, the search is continued with >>reduced depth. >> >>Our experiments with verified null-move pruning show that on average, it >>constructs a smaller search tree with greater tactical strength in comparison to >>standard null-move pruning. Moreover, unlike standard null-move pruning, which >>fails badly in zugzwang positions, verified null-move pruning manages to detect >>most zugzwangs and in such cases conducts a re-search to obtain the correct >>result. In addition, verified null-move pruning is very easy to implement, and >>any standard null-move pruning program can use verified null-move pruning by >>modifying only a few lines of code. >> >> >>pdf: http://www.cs.biu.ac.il/~davoudo/pubs/vrfd_null.pdf >>zipped pdf: http://www.cs.biu.ac.il/~davoudo/pubs/vrfd_null.pdf.zip >>gzipped postscript: http://www.cs.biu.ac.il/~davoudo/pubs/vrfd_null.ps.gz
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