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Halve king eval margin

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But still keep the same original
margin for score.

Passed both short TC test
LR: 2.95 (-2.94,2.94)
Total: 3710 W: 845 L: 726 D: 2139

And long TC
LLR: 2.95 (-2.94,2.94)
Total: 57859 W: 10939 L: 10532 D: 36388

bench: 4769737

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
homoSapiensSapiens
2013-07-16 18:52:55 +03:00
committed by Marco Costalba
parent 05e31c5e5f
commit 4b3a0fdab0
1 changed files with 1 additions and 1 deletions
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2
src/evaluate.cpp
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@@ -767,7 +767,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
// be very big, and so capturing a single attacking piece can therefore
// result in a score change far bigger than the value of the captured piece.
score -= KingDanger[Us == Search::RootColor][attackUnits];
margins[Us] += mg_value(KingDanger[Us == Search::RootColor][attackUnits]);
margins[Us] += mg_value(KingDanger[Us == Search::RootColor][attackUnits]) / 2;
}
if (Trace)