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Use lowply-history also on low depths

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STC:
https://tests.stockfishchess.org/tests/view/5ed75078f29b40b0fc95a8b9
LLR: 2.93 (-2.94,2.94) {-0.50,1.50}
Total: 73928 W: 14301 L: 14005 D: 45622
Ptnml(0-2): 1243, 8572, 17096, 8752, 1301

LTC:
https://tests.stockfishchess.org/tests/view/5ed895e0f29b40b0fc95a976
LLR: 2.93 (-2.94,2.94) {0.25,1.75}
Total: 154848 W: 19684 L: 19074 D: 116090
Ptnml(0-2): 1048, 14108, 46627, 14468, 1173

closes https://github.com/official-stockfish/Stockfish/pull/2718

bench: 4582693
This commit is contained in:
pb00067 2020-06-06 12:56:38 +02:00 • committed by Joost VandeVondele
parent fd8e88427b
commit 15e190e942
2 changed files with 2 additions and 2 deletions
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2
src/movepick.cpp
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@ -110,7 +110,7 @@ void MovePicker::score() {
+ 2 * (*continuationHistory[1])[pos.moved_piece(m)][to_sq(m)]
+ 2 * (*continuationHistory[3])[pos.moved_piece(m)][to_sq(m)]
+ (*continuationHistory[5])[pos.moved_piece(m)][to_sq(m)]
+ (ply < MAX_LPH ? 4 * (*lowPlyHistory)[ply][from_to(m)] : 0);
+ (ply < MAX_LPH ? std::min(4, depth / 3) * (*lowPlyHistory)[ply][from_to(m)] : 0);
else // Type == EVASIONS
{

2
src/search.cpp
View file

@ -971,7 +971,7 @@ moves_loop: // When in check, search starts from here
contHist,
countermove,
ss->killers,
depth > 12 ? ss->ply : MAX_PLY);
ss->ply);
value = bestValue;
singularQuietLMR = moveCountPruning = false;