Author: Uri Blass
Date: 13:44:59 03/15/04
Go up one level in this thread
On March 15, 2004 at 16:24:16, Ralf Schäfer wrote: >On March 15, 2004 at 14:28:57, Dann Corbit wrote: > >>On March 15, 2004 at 14:20:19, Ralf Schäfer wrote: >> >>>On March 14, 2004 at 20:28:15, Bas Hamstra wrote: >>> >>>>This copy & paste from Shredder 5 is soooo cool. This is a tough position from >>>>BS2830. I am curious how other engines do here. Tao 5.4 used to solve this in 2 >>>>minutes but the latest version has a hard time here. >>>> >>>>[D] 2r1r3/p3bk1p/1pnqpppB/3n4/3P2Q1/PB3N2/1P3PPP/3RR1K1 w - - >>>> >>>> >>>>Ciao! >>>> >>>>Bas. >>> >>>Hello Bas, >>> >>>I'm still surprised that my own engine Cheetah finds this move in 7 seconds at >>>ply 7 - maybe 7 is its lucky number ;-) >>> >>>Here is the thinking output: >>> >>>Cheetah 0.73 WB2 64 MB: >>> 1 00:00 0,85 Lb3xd5 >>> 1 00:00 2,15 Lb3c2 >>> 2 00:01 0,79 Lb3c2 Te8g8 >>> 3 00:02 0,83 Lb3c2 Te8g8 Te1e2 >>> 4 00:02 0,38 Lb3c2 Le7f8 Lh6d2 Lf8g7 >>> 4 00:02 0,47 Lb3xd5 Dd6xd5 Td1d3 Te8g8 >>> 4 00:02 0,49 Lb3a4 Le7f8 La4xc6 Tc8xc6 >>> 4 00:03 0,53 Dg4h4 Kf7g8 Lb3c2 f6f5 >>> 5 00:03 0,61 Dg4h4 Dd6d7 Lb3xd5 Dd7xd5 Dh4g4 >>> 6 00:04 0,49 Dg4h4 Dd6d7 Td1c1 Kf7g8 Lh6d2 g6g5 >>> 7 00:05 0,61 Dg4h4 Kf7g8 Td1c1 f6f5 Sf3g5 Le7xg5 Lh6xg5 >>> 7 00:07 0,62 Te1xe6 Dd6xe6 Sf3g5+ f6xg5 Dg4f3+ De6f5 Lb3xd5+ Kf7f6 Ld5xc6 >>>Df5xf3 >>> 8 00:09 0,74 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 Sc6e5 d4xe5 Dd6c6 >>> 9 00:11 1,15 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 Dd6d8 Dg4e6+ Kf7g7 Lb3xd5 >>>Sc6a5 >>>10 00:13 2,01 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 f6f5 Lf4xd6 f5xg4 Lb3xd5+ >>>Kf7f8 Te1xe7 >>>10 00:17 2,01 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 f6f5 Lf4xd6 f5xg4 Lb3xd5+ >>>Kf7f8 >>>11 00:21 0,90 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 f6f5 Lf4xd6 f5xg4 Lb3xd5+ >>>Kf7f8 Ld5xc6 Tc8xc6 >>>11 00:52 0,90 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 f6f5 Lf4xd6 f5xg4 Lb3xd5+ >>>Kf7f8 >>>12 00:54 1,16 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 f6f5 Lf4xd6 f5xg4 Lb3xd5+ >>>Kf7f8 Ld5xc6 Tc8xc6 >>>12 02:56 1,16 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 f6f5 Lf4xd6 f5xg4 Lb3xd5+ >>>Kf7f8 >>>13 03:34 1,59 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 f6f5 Dg4h3 Dd6xf4 Dh3xh7+ >>>Kf7f6 Lb3xd5 Sc6d8 b2b4 >>>13 11:50 1,59 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 f6f5 Dg4h3 Dd6xf4 Dh3xh7+ >>>Kf7f6 >>>14 14:31 1,80 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 f6f5 Dg4h3 Dd6xf4 Dh3xh7+ >>>Kf7f6 Lb3xd5 Sc6d8 g2g3 >>>14 54:43 1,80 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 f6f5 Dg4h3 Dd6xf4 Dh3xh7+ >>>Kf7f6 >>>15 01:05:54 1,60 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 h7h5 Dg4xc8 Te8xc8 Lf4xd6 >>>Le7xd6 Lb3xd5+ Kf7g7 >> >>Can you dump your evaluation terms to say why your engine picked the move so >>quickly? >> >>I am guessing king safety? > >Hi Dan, > >well, I think that its king safety will help to find the move fast, but maybe >this is not the only reason. After playing the moves from ply 15 Cheetah sees >the passed pawn on the d-file, at this point the king-safety is turned off >because there are too little pieces on the board (Cheetah needs 4 pieces or 2 >pieces and a queen for doing king safety) > >Cheetah's king-safety is a lighter version from Rebel's king safety which is >described on his page, so it is interesting if Rebel can find this move too... > >best wishes >Ralf It seems that you have big king safety scores that help you to fins the move fast by evaluation a position when white is a rook down for 2 pawns as better for white based on king safety. 13 11:50 1,59 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 f6f5 Dg4h3 Dd6xf4 Dh3xh7+ Kf7f6 14 14:31 1,80 Te1xe6 Dd6xe6 Td1e1 De6d6 Lh6f4 f6f5 Dg4h3 Dd6xf4 Dh3xh7+ Kf7f6 Lb3xd5 Sc6d8 g2g3 Uri
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