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Revert "Halve king eval margin"

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This reverts commit 4b3a0fdab0.

As Gary says: " It failed when I tried it at long TC previously, and only
barely passed this time.  Some anecdotal evidence is that it hurts vs other
engines as well (the Lightspeed rating list showed a 16 elo drop from previous
best version - still +- 5 error bars on both, but that's still significant)"

I also agree that if we have some doubts (like in this case) it is better to
be safe than sorry.

bench: 4615572
This commit is contained in:
Marco Costalba
2013-07-24 07:43:40 +02:00
parent d0bc951835
commit b0fd2b6b98
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]) / 2;
margins[Us] += mg_value(KingDanger[Us == Search::RootColor][attackUnits]);
}
if (Trace)