Author: Robert Hyatt
Date: 07:14:08 12/13/98
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On December 13, 1998 at 07:41:36, James T. Walker wrote: >On December 13, 1998 at 00:25:09, Robert Hyatt wrote: > >>On December 12, 1998 at 14:33:41, James T. Walker wrote: >> >>>Subject says it all.. I continue to get better results with 15.20 than 16.0. >>>Is anyone else testing with these two engines? What are the improvements with >>>Crafty 16.x ?? >>>Jim Walker >> >>There's no real differences between the two except for tablebase support >>changes... > >>>>>>>>>>>>>>>>>>>>>>>>>>>> >Hello Bob, >Thanks for answering my post here. I've asked this question before and you gave >me the same answer. The problem is that when I test the two programs I have >which were downloaded from your site (Wcrafty.exe) I get different results. >Here is a position from an earlier post by L.Chen: > >1rb2rk1/1q2bppp/4pn2/pN1pP3/B7/4BP2/1PP2QPP/2KR3R b - - 0 19 > >This was created by Crafty. Anyway, Crafty15.20 finds 19....Bd7 in about 3 >minutes. Crafty 16.0 finds Bd7 in almost 10 minutes a ply later. There are >other examples but if they were the same why wouldn't they take the same amount >of time for the same position. There are no tabelbase probes involved in the >search. >I want to play some games with CraftyXX.XX but would like to make sure I have >the strongest version vs some commercial programs. >Thanks for your answer, >Jim Walker there are some differences but they are *very* minor. IE I played a bunch of 1 minute games and they come out pretty even, with a slight bias for 16.0/1... (don't use 16.0 with tablebases, there is a subtle bug in the probe code that will screw up if an enpassant capture is possible)... But as always, use the one you want, or the one you think is best...
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