Author: Robert Hyatt
Date: 15:21:52 04/09/01
Go up one level in this thread
On April 09, 2001 at 17:08:49, Vincent Diepeveen wrote: >On April 09, 2001 at 16:49:21, Normand M. Blais wrote: > >>On April 09, 2001 at 16:21:56, Andrei Fortuna wrote: >> >> >>>positional score > 2 PAWN_VALUE. And that will hurt my quiescence and my >>>futility pruning if I assume that 2*PAWN_VALUE is max positional score. It all >>>boils down to the magnitude of the positional scores versus pawn value, I think >>>I have to choose either to keep big bonuses and turn futility off (or set a >>>bigger margin for futility but in that case it would make futility more >>>inefficient) or keep small bonuses and enjoy the reductions I get from futility >>>and quiescence. >> >>What if you multiply the value of the material by 10 (i.e. pawn = 1000 Knight = >>3000 Bishop = 3000 Rook = 5000 Queen = 10000 ) and keep the positional score as >>it is. >> >>N.M.B. > >then his program will volunteerly >accept a pawn and get mated a few moves later. > >A good test position is DIEP - crafty wmccc2000: > >e2-e4 (2:00:00,2:00:00) book >c7-c5 (2:00:00,1:59:19) >g1-f3 (2:00:00,1:59:19) book >d7-d6 (2:00:00,1:59:06) >d2-d4 (2:00:00,1:59:06) book >c5xd4 (2:00:00,1:58:48) >f3xd4 (1:59:59,1:58:48) book >g8-f6 (1:59:59,1:58:21) >b1-c3 (1:59:59,1:58:21) book >a7-a6 (1:59:59,1:58:02) >c1-g5 (1:59:59,1:58:02) book >e7-e6 (1:59:59,1:57:44) >f2-f4 (1:59:59,1:57:44) book >d8-b6 (1:59:59,1:57:29) >d1-d2 (1:59:59,1:57:29) book >b6xb2 (1:59:59,1:57:16) >a1-b1 (1:59:59,1:57:16) book >b2-a3 (1:59:59,1:56:53) >f4-f5 (1:59:59,1:56:53) book >b8-c6 (1:59:59,1:56:28) >f5xe6 (1:59:59,1:56:28) book >f7xe6 (1:59:59,1:55:59) >d4xc6 (1:59:59,1:55:59) book >b7xc6 (1:59:59,1:55:43) >e4-e5 (1:59:59,1:55:43) book >d6xe5 (1:59:59,1:51:36) >g5xf6 (1:59:59,1:51:36) book >g7xf6 (1:59:59,1:50:43) >c3-e4 (1:59:59,1:50:43) book >f8-e7 (1:59:59,1:46:38) >f1-e2 (1:59:59,1:46:38) book > >Here crafty played O-O?? it castled straight into the mate here by >doing that. O-O is a big blunder. Diep wmccc2000 played h5 there. > >Let's have a look whether current version also does that... > > > > > >best regards, >Vincent If you will post it in a standard machine readable form rather than in that e2-e4 gobbledygook, I will try it. :)
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