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tviigg. (#2238)

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Current master code made sence when we had 2 types of bonuses for protected path to queen. But it was simplified so we have only one bonus now and code was never cleaned.
This non-functional simplification removes useless defendedsquares bitboard and removes one bitboard assignment (defendedSquares &= attackedBy[Us][ALL_PIECES] + defendedSquares & blockSq becomes just attackedBy[Us][ALL_PIECES] & blockSq also we never assign defendedSquares = squaresToQueen because we don't need it).
So should be small non-functional speedup.
Passed simplification SPRT.
http://tests.stockfishchess.org/tests/view/5d2966ef0ebc5925cf0d7659
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 23319 W: 5152 L: 5034 D: 13133

bench 3361902
This commit is contained in:
Michael Chaly 2019-07-14 15:41:28 +03:00 • committed by Marco Costalba
parent a0360cc2d4
commit 0a8a3b8d9c
1 changed files with 3 additions and 6 deletions
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9
src/evaluate.cpp
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@ -605,7 +605,7 @@ namespace {
return std::min(distance(pos.square<KING>(c), s), 5);
};
Bitboard b, bb, squaresToQueen, defendedSquares, unsafeSquares;
Bitboard b, bb, squaresToQueen, unsafeSquares;
Score score = SCORE_ZERO;
b = pe->passed_pawns(Us);
@ -636,14 +636,11 @@ namespace {
// If the pawn is free to advance, then increase the bonus
if (pos.empty(blockSq))
{
defendedSquares = squaresToQueen = forward_file_bb(Us, s);
squaresToQueen = forward_file_bb(Us, s);
unsafeSquares = passed_pawn_span(Us, s);
bb = forward_file_bb(Them, s) & pos.pieces(ROOK, QUEEN);
if (!(pos.pieces(Us) & bb))
defendedSquares &= attackedBy[Us][ALL_PIECES];
if (!(pos.pieces(Them) & bb))
unsafeSquares &= attackedBy[Them][ALL_PIECES] | pos.pieces(Them);
@ -656,7 +653,7 @@ namespace {
0 ;
// Assign a larger bonus if the block square is defended
if (defendedSquares & blockSq)
if ((pos.pieces(Us) & bb) || (attackedBy[Us][ALL_PIECES] & blockSq))
k += 5;
bonus += make_score(k * w, k * w);