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Simplify pruning rule

STC: http://tests.stockfishchess.org/tests/view/583df86d0ebc5903140c5481
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 43283 W: 7761 L: 7678 D: 27844

LTC: http://tests.stockfishchess.org/tests/view/583f42670ebc5903140c5525
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 56587 W: 7232 L: 7157 D: 42198

bench: 5084980
This commit is contained in:
goodkov 2016-11-30 00:43:03 +04:00 committed by Marco Costalba
parent 1e76ba7cec
commit e70da0d2eb

View file

@ -950,9 +950,10 @@ moves_loop: // When in check search starts from here
}
else if (depth < 7 * ONE_PLY && !extension)
{
Value v = Value(-35 * depth / ONE_PLY * depth / ONE_PLY);
if (ss->staticEval != VALUE_NONE)
v += ss->staticEval - alpha - 200;
Value v = -Value(399 + 35 * depth / ONE_PLY * depth / ONE_PLY);
if (PvNode)
v += beta - alpha - 1;
if (!pos.see_ge(move, v))
continue;