Author: Robert Hyatt
Date: 07:07:29 05/26/04
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On May 26, 2004 at 09:31:16, Tony Werten wrote: >Hi all, > >I was looking through the SMP code of Crafty and I noticed it's not using pvs on >the first rootmove. ie if the value of the search is > alpha, then >alpha=search_value, but I don't see any beta=alpha+1. > >Any special reasons for this ? > >Tony You will have to explain what you are looking at. IE the first root move is always searched first, with a normal alpha/beta window. The remainder of the moves are searched with a null-window according to PVS. Inside the parallel search, Thread() is called and it is always passed the normal alpha/beta values but SearchSMP() does the normal PVS (null-window) search and if that fails, tries a normal search. Perhaps I'm not looking at what you are, which makes it less simple to follow?
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