Author: Graham Laight
Date: 02:48:14 04/10/01
Go up one level in this thread
On April 09, 2001 at 18:28:58, Vincent Diepeveen wrote: >On April 09, 2001 at 18:21:52, Robert Hyatt wrote: > >>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. >> >>:) > >K:\diep>type forbob.fen [D] r1b1k2r/4b2p/p1p1pp2/4p3/4N3/q7/P1PQB1PP/1R2K2R b >h5! o-o?? > >Note you should also checkout the operating time your operator >needed. Cool man, but should not operate crafty. Learned a lot >about computerchess i guess in that tournament. > >You need an operator who can operate it at 7 0 too ! Eh? As I remember, I allowed 5 minutes per 2 hours - or about 7 seconds per move. This isn't all that much more than other operators. As least I didn't run out of time in any of my games, unlike a certain program I could mention (whose name begins with "D")... Also, don't you remember that after the game I reverted Crafty back to the castling position and let it think for about 90 minutes during the remainder of the morning and the lunch break? After this interval, Crafty still wanted to castle. It's one of those positions in the opening which computers cannot work out correctly, and which therefore needs to be covered by the opening book. Unfortunately, our large opening book was not working correctly, so we had to use a small emergency opening book which unfortunately doesn't cover this particular line far enough. Too many words and not enough thinking, Vincent! :)
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