Author: Dann Corbit
Date: 20:56:36 12/03/99
Go up one level in this thread
On December 03, 1999 at 08:05:23, Bernhard Bauer wrote: >On December 03, 1999 at 01:27:03, Jouni Uski wrote: > >>As first program ever Nimzo got 30/30 in that test, when PC is AMD K6-2/450 and >>hash 40MB. >>Individual results in seconds (all positions kept at least 2 more plys): >> >> 1 2 3 4 5 6 7 8 9 10 >>0 1 2 3 58 3 2 1 1 2 5 >>1 1 1 573 1 4 180 1 1 3 2 >>2 28 1 4 8 4 1 1 108 95 2 >> >>Quite stunning! >> >>Jouni >> >>Test available at: >>http://www.geocities.com/CapeCanaveral/Launchpad/2640/pgn/tests/index.htm. > >Some years ago we had the results for this test (BT2630) of many programs. >That was interesting. >So I will give the results for Crafty too. > >Hardware: Intel 2x P3-450 >Software: Crafty 17.3 24,8,8 Mb hash > > I 1 2 3 4 5 6 7 8 9 10 >--I----------------------------------------------------------- >0 I 1 4 9 17 0 0 0 0 18 3 >1 I 0 0 248 2 114 900 4 12 26 0 >2 I 270 0 900 900 7 0 4 213 900 0 > >Total time: 4552; Elo: 2478 > >Remark: >Pos 15: e5 is found after 4.7 sec at ply 9, but fails low at ply 11 and > Crafty likes Rf6+ followed by e5 with a score of 2.0 at ply 14. > 1. Rf6+ Kg7 2. e5 is shown after 114 sec. >Pos 16: Crafty 17.2 finds 1. ... Nxg2 after 25:42 min. > >Does anybody disagree with 1.Rf6+ in pos 15? The C.A.P. record for this position (looks like a Rebel generated one) says: pv e5 dxe5 Rf6+ Kg7 with a depth of 13 ply and a ce of 146. The alternate evaluation is: ce 173 pv e5 dxe5 Rf6+ Kg7 Rd6 Qf7 Qxf7+ Kxf7 Rxh6 Bg4 Nf6 Nxc4 Nxh5 e4 Nf6 and appears to be crafty generated. What does your crafty say if you let it run longer? Did you fix the sign bug on the character array? There is one other thing that needs attention in the 17.3 sources also: This is clearly a bug. The macro Captured can never yield a negative number. Captured (move) != -king && valid.c(206) : Warning 650: Constant out of range for operator '!=' Here is the actual definition: CHESS.H ( 1058): #define Captured(a) (((a)>>15)&7) If you have fixed both problems, what answer do you get with your crafty when allowed to run a long time on the position?
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