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Tweak capture scoring formula 

STC:
LLR: 2.96 (-2.94,2.94) [0.00,4.00]
Total: 20556 W: 4685 L: 4438 D: 11433
http://tests.stockfishchess.org/tests/view/5d25d26e0ebc5925cf0d0b4a

LTC:
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 14856 W: 2649 L: 2446 D: 9761
http://tests.stockfishchess.org/tests/view/5d25d8b20ebc5925cf0d0c6d

bench: 3206912
pull/2215/head^2
VoyagerOne 2019-07-10 19:59:33 -04:00 committed by Stéphane Nicolet
parent 5a7827d59d
commit c83cbe42f3
1 changed files with 2 additions and 2 deletions
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4
src/movepick.cpp
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@ -107,8 +107,8 @@ void MovePicker::score() {
for (auto& m : *this)
if (Type == CAPTURES)
m.value = PieceValue[MG][pos.piece_on(to_sq(m))]
+ (*captureHistory)[pos.moved_piece(m)][to_sq(m)][type_of(pos.piece_on(to_sq(m)))] / 8;
m.value = int(PieceValue[MG][pos.piece_on(to_sq(m))]) * 6
+ (*captureHistory)[pos.moved_piece(m)][to_sq(m)][type_of(pos.piece_on(to_sq(m)))];
else if (Type == QUIETS)
m.value = (*mainHistory)[pos.side_to_move()][from_to(m)]