Author: Jeff White
Date: 15:42:27 04/08/02
Go up one level in this thread
On April 08, 2002 at 16:47:19, Russell Reagan wrote: >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 Thanks very much for clearing this up. I appreciate it. Regards, Jeff
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