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Introduce one more continuation history

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This one is counter counter counter history - with really low update value and divided by 3 in movepicker unlike the other ones.

Passed STC:
https://tests.stockfishchess.org/tests/view/67861495460e2910c51de720
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 44352 W: 11699 L: 11370 D: 21283
Ptnml(0-2): 156, 5098, 11361, 5383, 178

Passed LTC:
https://tests.stockfishchess.org/tests/view/6786e89e3b8f206a2696b646
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 432660 W: 110355 L: 109207 D: 213098
Ptnml(0-2): 381, 48214, 118039, 49268, 428

closes https://github.com/official-stockfish/Stockfish/pull/5792

Bench: 1491837
This commit is contained in:
Michael Chaly
2025-01-18 21:04:55 +01:00
committed by Joost VandeVondele
parent b392ac76db
commit 7701d0b3c4
2 changed files with 6 additions and 8 deletions
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src/movepick.cpp
+1
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@@ -162,6 +162,7 @@ void MovePicker::score() {
m.value += (*continuationHistory[1])[pc][to];
m.value += (*continuationHistory[2])[pc][to];
m.value += (*continuationHistory[3])[pc][to];
m.value += (*continuationHistory[4])[pc][to] / 3;
m.value += (*continuationHistory[5])[pc][to];
// bonus for checks