Author: Uri Blass
Date: 07:41:33 02/25/01
Go up one level in this thread
On February 25, 2001 at 10:34:15, Sune Larsson wrote: >On February 25, 2001 at 09:45:48, Uri Blass wrote: > >>On February 25, 2001 at 08:55:47, Sune Larsson wrote: >> >>>On February 25, 2001 at 07:55:31, Ferdinand S. Mosca wrote: >>> >>>>On February 25, 2001 at 07:10:13, Sune Larsson wrote: >>>> >>>>> >>>>> [D]7k/7P/P5K1/8/4B3/8/8/6b1 w - - 0 1 >>>>> >>>>> >>>>> This is a dead draw. Black just moves his bishop on the a7-g1 diagonal. >>>>> Correct evaluation of this position is 0.00. Here are the results of >>>>> some programs, after a few minutes of thinking on a PIII 800. >>>>> It's a falling scale from "best" to "worse". >>>>> >>>>> 1) Nimzo 7.32 + 1.83 >>>>> 2) Nimzo 8 + 1.96 >>>>> 3) Hiarcs 7.32 + 2.20 >>>>> 4) Chess Tiger + 2.40 >>>>> 5) Junior 6 + 2.44 >>>>> 6) Fritz 5.32 + 2.75 >>>>> 7) Crafty 18.01 + 2.80 >>>>> 8) Century 3.0 + 3.23 >>>>> 9) Gandalf 4.32g + 3.24 >>>>> 10) Phalanx 22 + 3.28 >>>>> 11) Fritz 6 + 3.84 >>>>> 12) Junior 5 + 3.85 >>>>> 13) Deep Fritz + 4.03 >>>>> 14) SOS + 4.78 >>>>> 15) Gromit 3.1 + 5.40 >>>>> >>>>> Sune >>>> >>>> >>>>Very impressive comparison, I thought now of doing the same but for a >>>>different position, maybe to give a hint of which program packs >>>>a particular knowledge. What will be your suggestion on the time to be used? >>>> >>>>Regards, >>>>Dinan >>> >>> For practical reasons and since this is about knowledge, I used 3 min >>> of thinking time per program (PIII 800). I also gave a couple of them much >>> more time, just to check, but the evals wouldn't change. If you know you know >>> and if you don't you don't...;) >> >>I disagree. >>It is possible to learn to change your evaluation function. > > Sorry Uri but I think you missed my point. I meant that it doesn't matter if > a program thinks 3 or 20 minutes in the above position. Either it has knowledge > about it or not. But of course the programmers can change the eval function. > In fact, that is one of the points by posting this. > > Sune I thought about learning from search and not using previous knowledge about this kind of position. I know no top program that knows it when humans know to learn from searh to change their evalution function. Uri
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