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Don't change ttPv at probCut

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STC:
LLR: 2.96 (-2.94,2.94) <-2.25,0.25>
Total: 35672 W: 9618 L: 9462 D: 16592
Ptnml(0-2): 151, 3890, 9601, 4040, 154
https://tests.stockfishchess.org/tests/view/62ab03f750949cfc241b1965

LTC:
LLR: 2.93 (-2.94,2.94) <-2.25,0.25>
Total: 54160 W: 14626 L: 14511 D: 25023
Ptnml(0-2): 42, 5414, 16056, 5523, 45
https://tests.stockfishchess.org/tests/view/62ab5e6fd89eb6cf1e071b87

closes https://github.com/official-stockfish/Stockfish/pull/4088

bench: 5798229
This commit is contained in:
bmc4 2022-06-16 07:19:39 -03:00 • committed by Joost VandeVondele
parent 6edc29d720
commit 4d6a11a04c
1 changed files with 1 additions and 4 deletions
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5
src/search.cpp
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@ -867,8 +867,6 @@ namespace {
assert(probCutBeta < VALUE_INFINITE); assert(probCutBeta < VALUE_INFINITE);
MovePicker mp(pos, ttMove, probCutBeta - ss->staticEval, depth - 3, &captureHistory); MovePicker mp(pos, ttMove, probCutBeta - ss->staticEval, depth - 3, &captureHistory);
bool ttPv = ss->ttPv;
ss->ttPv = false;
while ((move = mp.next_move()) != MOVE_NONE) while ((move = mp.next_move()) != MOVE_NONE)
if (move != excludedMove && pos.legal(move)) if (move != excludedMove && pos.legal(move))
@ -895,11 +893,10 @@ namespace {
if (value >= probCutBeta) if (value >= probCutBeta)
{ {
// Save ProbCut data into transposition table // Save ProbCut data into transposition table
tte->save(posKey, value_to_tt(value, ss->ply), ttPv, BOUND_LOWER, depth - 3, move, ss->staticEval); tte->save(posKey, value_to_tt(value, ss->ply), ss->ttPv, BOUND_LOWER, depth - 3, move, ss->staticEval);
return value; return value;
} }
} }
ss->ttPv = ttPv;
} }
// Step 11. If the position is not in TT, decrease depth by 3. // Step 11. If the position is not in TT, decrease depth by 3.