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less bonus for blocked connected pawn

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Use less bonus for blocked connected pawns so closed positions are less worth.

STC:
LLR: 2.96 (-2.94,2.94) {-0.50,1.50}
Total: 60004 W: 11904 L: 11619 D: 36481
Ptnml(0-2): 1066, 7083, 13535, 7136, 1182
https://tests.stockfishchess.org/tests/view/5e941a8063d105aebbab23e3

LTC:
LLR: 2.95 (-2.94,2.94) {0.25,1.75}
Total: 36606 W: 4831 L: 4556 D: 27219
Ptnml(0-2): 252, 3353, 10872, 3520, 306
https://tests.stockfishchess.org/tests/view/5e9444b963d105aebbab2427

closes https://github.com/official-stockfish/Stockfish/pull/2629

Bench: 4961260
This commit is contained in:
Stefan Geschwentner 2020-04-13 23:01:38 +02:00 • committed by Joost VandeVondele
parent de9fc53af5
commit 5c58f67126
1 changed files with 1 additions and 1 deletions
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2
src/pawns.cpp
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@ -138,7 +138,7 @@ namespace {
// Score this pawn
if (support | phalanx)
{
int v = Connected[r] * (2 + bool(phalanx) - bool(opposed))
int v = Connected[r] * (4 + 2 * bool(phalanx) - 2 * bool(opposed) - bool(blocked)) / 2
+ 21 * popcount(support);
score += make_score(v, v * (r - 2) / 4);