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Simplify WeakUnopposedPawn #2181

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This is a functional simplification.

Moves WeakUnopposedPawn to pawns.cpp and remove piece dependency.

STC
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 8699 W: 2000 L: 1853 D: 4846
http://tests.stockfishchess.org/tests/view/5cf7721b0ebc5925cf08ee79

LTC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 46605 W: 7969 L: 7890 D: 30746
http://tests.stockfishchess.org/tests/view/5cf7d5f70ebc5925cf08fa96
This commit is contained in:
protonspring
2019-06-09 06:28:42 -06:00
committed by Marco Costalba
parent 6ed81f09ff
commit 5935daf8a5
3 changed files with 4 additions and 10 deletions
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7
src/pawns.cpp
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@@ -35,6 +35,7 @@ namespace {
constexpr Score Backward = S( 9, 24);
constexpr Score Doubled = S(11, 56);
constexpr Score Isolated = S( 5, 15);
constexpr Score WeakUnopposed = S( 13, 27);
// Connected pawn bonus
constexpr int Connected[RANK_NB] = { 0, 7, 8, 12, 29, 48, 86 };
@@ -77,7 +78,7 @@ namespace {
Bitboard ourPawns = pos.pieces( Us, PAWN);
Bitboard theirPawns = pos.pieces(Them, PAWN);
e->passedPawns[Us] = e->pawnAttacksSpan[Us] = e->weakUnopposed[Us] = 0;
e->passedPawns[Us] = e->pawnAttacksSpan[Us] = 0;
e->kingSquares[Us] = SQ_NONE;
e->pawnAttacks[Us] = pawn_attacks_bb<Us>(ourPawns);
@@ -132,10 +133,10 @@ namespace {
score += make_score(v, v * (r - 2) / 4);
}
else if (!neighbours)
score -= Isolated, e->weakUnopposed[Us] += !opposed;
score -= Isolated + WeakUnopposed * int(!opposed);
else if (backward)
score -= Backward, e->weakUnopposed[Us] += !opposed;
score -= Backward + WeakUnopposed * int(!opposed);
if (doubled && !support)
score -= Doubled;