Author: Russell Reagan
Date: 13:47:19 04/08/02
Go up one level in this thread
On April 08, 2002 at 16:12:54, Jeff White wrote: >33.cxd5 Qxc5 >-+ (-10.77) Depth: 2/5 00:00:00 >33.Qxd5 cxd5 >-+ (-10.41) Depth: 2/5 00:00:00 >33.Rxb7 >-+ (-10.01) Depth: 2/5 00:00:00 >33.Rxb7 Qf5+ 34.Kg2 Rxc5 35.Rxb8+ >-+ (-9.58) Depth: 2/5 00:00:00 >33.Rxb7 Qf5+ 34.g4 Rd3+ 35.Kg2 Qxc5 36.Rxb8+ >-+ (-9.73) Depth: 3/7 00:00:00 >33.Rxb7 Qf5+ 34.g4 Rd3+ 35.Kh4 Qxc5 36.Rxb8+ >-+ (-9.75) Depth: 4/11 00:00:00 > >The above evaluation is something that I just cut and pasted from a game that >Crafty evaluated. These are BASICALLY the same on all computer programs. What I >need to know is what these figures mean. Am I right in assuming that -10.77 >would mean the program sees the position better for black? If it was a +10.77 it >would be better for white? What does the number mean? The "10.77"? What about >depth 2/5? I am also assuming that 00:00:00 would mean the time the program >looked at the position? ANY help is greatly appreciated. Thanks very much. > >Regards, >Jeff You are correct in assuming that negative values are good for black, and positive values are good for white. Most computer programs (in fact, all that I've ever seen) give the value in terms of pawns. So if the score is -10.77, that means that black is ahead by about 10 or 11 pawns. You can also use the rough piece values of queen=9, bishop and knight=3, pawns=1, rooks=5 if you want a general estimate. The depth 2/5 means that the computer looked at every move up to 2 ply deep, and then it only looked at some of the moves up to 5 ply. If you know anything about programming chess, the first number is usually the alpha beta search depth, and the second number is usually the quiesent search depth. And you are correct about 00:00:00 being the amount of time the computer spent on that position. 00:00:00 just means it spent less than 1 second looking, since obviously "zero time" wouldn't give you any result. Russell
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