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Simplify TT penalty stat (#980)

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STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 20251 W: 3692 L: 3570 D: 12989

LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 16432 W: 2155 L: 2029 D: 12248

Bench: 5941174
This commit is contained in:
VoyagerOne 2017-01-29 02:54:58 -05:00 • committed by Marco Costalba
parent 5254a6040c
commit fa24cc25a4
1 changed files with 1 additions and 1 deletions
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2
src/search.cpp
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@ -657,7 +657,7 @@ namespace {
update_cm_stats(ss-1, pos.piece_on(prevSq), prevSq, -stat_bonus(depth + ONE_PLY));
}
// Penalty for a quiet ttMove that fails low
else if (ttValue < alpha && !pos.capture_or_promotion(ttMove))
else if (!pos.capture_or_promotion(ttMove))
{
Value penalty = -stat_bonus(depth + ONE_PLY);
thisThread->history.update(pos.side_to_move(), ttMove, penalty);