From: Chris Cain <chricainogithub@gmail.com>
Date: Thu, 16 Jan 2014 21:50:08 +0000 (+0000)
Subject: Simplify pawnless endgame evaluation
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=df201175c6a0704800b1578e338c6e2a202234fe;hp=df201175c6a0704800b1578e338c6e2a202234fe;p=stockfish

Simplify pawnless endgame evaluation

Retire KmmKm evaluation function. Instead give a very drawish
scale factor when the material advantage is small and not much
material remains.

Retire NoPawnsSF array. Pawnless endgames without a bishop will
now be scored higher. Pawnless endgames with a bishop pair will
be scored lower. The effect of this is hopefully small.

Consistent results both at short TC (fixed games):
ELO: -0.00 +-2.1 (95%) LOS: 50.0%
Total: 40000 W: 7405 L: 7405 D: 25190

And long TC (fixed games):
ELO: 0.77 +-1.9 (95%) LOS: 78.7%
Total: 39690 W: 6179 L: 6091 D: 27420

bench: 7213723
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