Author: Robert Hyatt
Date: 07:02:43 02/25/01
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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 This is solvable, should it be "important". IE I have code that will recognize the rook pawn + wrong bishop as a dead draw, and it works well. The problem here is that there is another pawn. And a bishop that will prevent it from moving forever. I don't catch this in the evaluation. And based on your score, I am a bit concerned that my opposite-colored bishop code is not working either. I will look at the latter, but the extra bishop and pawn case simply hasn't hit me in all the games played on ICC that I have looked at, which is why I haven't tried to evaluate this case. I can certainly see an efficient way to handle this...
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