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Simplify passed pawns logic
authorMarco Costalba <mcostalba@gmail.com>
Sat, 12 Nov 2011 08:03:18 +0000 (09:03 +0100)
committerMarco Costalba <mcostalba@gmail.com>
Sat, 12 Nov 2011 08:09:41 +0000 (09:09 +0100)
Remove the bonus for no *friendly* pieces in the pawn's path and
reduce a bit the bonus based on kings proximity.

This patch is part of to the ongoing effort to remove form evaluation
all the terms that do not add value.

After 16284 games:

Mod vs Orig 2728 - 2651 - 10911 ELO +1 (+- 3.1)

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

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