Author: George Sobala
Date: 02:31:55 12/13/03
Go up one level in this thread
On December 13, 2003 at 05:01:26, Dann Corbit wrote: >On December 13, 2003 at 04:31:15, Uri Blass wrote: > >>On December 12, 2003 at 20:43:25, Dann Corbit wrote: >> >>>In solving WAC at 5 seconds per position on a 950 MHz AMD Athlon machine, Crafty >>>solves 294 out of 300. That is pretty run of the mill as far as top engines go. >> >>No >> >>Knightdreamer is not a top engine and it solved 297/300 in 5 seconds in slower >>hardware(733 mhz PIII). > >And shredder 6 solves 285/300 on similar hardware. > >>see http://www3.tripnet.se/~owemelin/johan/KnightDreamer.html >>and look in version history. >> >>I do not have chessmaster9000 but I believe that it is slightly better than >>knightdreamer in solving test suites. >> >>I also think that some of the problems in Wac are solved for positional >>reasons(for example Rb4). > >That one is solved by blockade detection. > >>personally I do not like 0.00 scores for positions that one side has material >>advantage and you only suspect that it is a draw. > >It *is* a draw until a way to break through the wall is found that is better >than simply losing material. > >>The question is if detect draw does not detect draw for non drawn position. >>If it means that in most of the cases it is draw but there are mistakes then it >>may be better to use something between 0.00 and 1 pawn advantage for the better >>side based on the static evaluation without detect draw. >> >>0.00 is justified only if you are sure that the position is a draw or both sides >>have the same chances. >> >>Note that even if you detect other moves as +1 for black crafty can solve it >>because it detected Rb4 as +1.18 for black at depth 14. > >Crafty detects the potential draw for the same reason that you would see it. >Crafty breaks the dam for the same reason that you would break it. Dan - could you perhaps put your compiled crafty Windows executable somewhere onto your ftp site? Or if you have, perhaps tell us where it is? (Can't find it!)
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