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Simplify TrappedRook

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Simplified TrappedRook to a single penalty removing the dependency on mobility.

STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 106718 W: 23530 L: 23577 D: 59611
http://tests.stockfishchess.org/tests/view/5c43f6bd0ebc5902bb5d4131

LTC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 54053 W: 8890 L: 8822 D: 36341
http://tests.stockfishchess.org/tests/view/5c44932a0ebc5902bb5d4d59

bench 3665090
This commit is contained in:
protonspring 2019-01-21 11:55:51 -07:00 • committed by Stéphane Nicolet
parent 58d3ee6175
commit 2d0af36753
1 changed files with 2 additions and 2 deletions
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4
src/evaluate.cpp
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@ -168,7 +168,7 @@ namespace {
constexpr Score ThreatByPawnPush = S( 48, 39);
constexpr Score ThreatByRank = S( 13, 0);
constexpr Score ThreatBySafePawn = S(173, 94);
constexpr Score TrappedRook = S( 96, 4);
constexpr Score TrappedRook = S( 47, 4);
constexpr Score WeakQueen = S( 49, 15);
constexpr Score WeakUnopposedPawn = S( 12, 23);
@ -377,7 +377,7 @@ namespace {
{
File kf = file_of(pos.square<KING>(Us));
if ((kf < FILE_E) == (file_of(s) < kf))
score -= (TrappedRook - make_score(mob * 22, 0)) * (1 + !pos.castling_rights(Us));
score -= TrappedRook * (1 + !pos.castling_rights(Us));
}
}