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Make static value saved in TT independent from ply

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After 963 games at 1+0

Mod vs Orig +246 =511 -206 52.08%  501.0/962  +14 ELO

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Joona Kiiski 2009-09-16 06:52:10 +03:00 • committed by Marco Costalba
parent c81010a878
commit cddda7cd19
1 changed files with 3 additions and 7 deletions
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10
src/search.cpp
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@ -1540,14 +1540,10 @@ namespace {
// Use the cached evaluation score if possible
assert(ei.futilityMargin == Value(0));
staticValue = tte->value();
staticValue = tte->value() + ply;
}
else
{
staticValue = evaluate(pos, ei, threadID);
if (!value_is_mate(staticValue + Value(ply)))
staticValue += Value(ply);
}
staticValue = evaluate(pos, ei, threadID) + ply;
if (ply == PLY_MAX - 1)
return evaluate(pos, ei, threadID);
@ -1560,7 +1556,7 @@ namespace {
{
// Store the score to avoid a future costly evaluation() call
if (!isCheck && !tte && ei.futilityMargin == 0)
TT.store(pos.get_key(), value_to_tt(bestValue, ply), VALUE_TYPE_EVAL, Depth(-127*OnePly), MOVE_NONE);
TT.store(pos.get_key(), bestValue - ply, VALUE_TYPE_EVAL, Depth(-127*OnePly), MOVE_NONE);
return bestValue;
}