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Subject: endgame eval question

Author: Jon Dart

Date: 15:32:27 11/25/98


In a recent game, my program (White) reached this position:

5b2/5P2/p7/5P2/P7/2k5/8/1K6/ w

White is a pawn down and the passer is firmly blocked. A
little search will reveal that White is going to lose the
advanced pawns. But I am curious about Crafty's eval here
(this is crafty 15.18):

White(1): setboard 5b2/5P2/p7/5P2/P7/2k5/8/1K6/ w
White(1): score
end-game phase
              clearing hash tables
note: scores are for the white side
material evaluation.................  -1.00
development.........................   0.00
pawn evaluation.....................   0.55
passed pawn evaluation..............  -0.10
passed pawn race evaluation.........   0.00
interactive piece evaluation........  -1.40
total evaluation....................  -1.95
White(1): execution complete.

I don't really see how the passed pawn eval
gets to be negative, or where the "interactive
piece evaluation" gets to be -1.40. Clearly
Crafty realizes statically that White is in
trouble here, but I'm having difficulty looking
at the source and seeing what eval terms are
kicking in.

Also, I'd be interested to see what score other
programs give here.

--Jon



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