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Code Issues Releases Wiki Activity

Use ALL_PIECES value to reference attackedBy

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No functional change
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jundery 2013-03-20 23:07:25 -06:00 • committed by Marco Costalba
parent 077e32efc9
commit d39b22927e
1 changed files with 13 additions and 13 deletions
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22
src/evaluate.cpp
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@ -40,8 +40,8 @@ namespace {
Pawns::Entry* pi;
// attackedBy[color][piece type] is a bitboard representing all squares
// attacked by a given color and piece type, attackedBy[color][0] contains
// all squares attacked by the given color.
// attacked by a given color and piece type, attackedBy[color][ALL_PIECES]
// contains all squares attacked by the given color.
Bitboard attackedBy[COLOR_NB][PIECE_TYPE_NB];
// kingRing[color] is the zone around the king which is considered
@ -693,7 +693,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
// Undefended minors get penalized even if not under attack
undefendedMinors = pos.pieces(Them)
& (pos.pieces(BISHOP) | pos.pieces(KNIGHT))
& ~ei.attackedBy[Them][0];
& ~ei.attackedBy[Them][ALL_PIECES];
if (undefendedMinors)
score += UndefendedMinorPenalty;
@ -701,7 +701,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
// Enemy pieces not defended by a pawn and under our attack
weakEnemies = pos.pieces(Them)
& ~ei.attackedBy[Them][PAWN]
& ei.attackedBy[Us][0];
& ei.attackedBy[Us][ALL_PIECES];
if (!weakEnemies)
return score;
@ -740,7 +740,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
score += evaluate_pieces<QUEEN, Us, Trace>(pos, ei, mobility, mobilityArea);
// Sum up all attacked squares
ei.attackedBy[Us][0] = ei.attackedBy[Us][PAWN] | ei.attackedBy[Us][KNIGHT]
ei.attackedBy[Us][ALL_PIECES] = ei.attackedBy[Us][PAWN] | ei.attackedBy[Us][KNIGHT]
| ei.attackedBy[Us][BISHOP] | ei.attackedBy[Us][ROOK]
| ei.attackedBy[Us][QUEEN] | ei.attackedBy[Us][KING];
return score;
@ -768,7 +768,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
{
// Find the attacked squares around the king which has no defenders
// apart from the king itself
undefended = ei.attackedBy[Them][0] & ei.attackedBy[Us][KING];
undefended = ei.attackedBy[Them][ALL_PIECES] & ei.attackedBy[Us][KING];
undefended &= ~( ei.attackedBy[Us][PAWN] | ei.attackedBy[Us][KNIGHT]
| ei.attackedBy[Us][BISHOP] | ei.attackedBy[Us][ROOK]
| ei.attackedBy[Us][QUEEN]);
@ -816,7 +816,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
}
// Analyse enemy's safe distance checks for sliders and knights
safe = ~(pos.pieces(Them) | ei.attackedBy[Us][0]);
safe = ~(pos.pieces(Them) | ei.attackedBy[Us][ALL_PIECES]);
b1 = pos.attacks_from<ROOK>(ksq) & safe;
b2 = pos.attacks_from<BISHOP>(ksq) & safe;
@ -903,7 +903,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
if (pos.is_empty(blockSq))
{
squaresToQueen = forward_bb(Us, s);
defendedSquares = squaresToQueen & ei.attackedBy[Us][0];
defendedSquares = squaresToQueen & ei.attackedBy[Us][ALL_PIECES];
// If there is an enemy rook or queen attacking the pawn from behind,
// add all X-ray attacks by the rook or queen. Otherwise consider only
@ -912,7 +912,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
&& (forward_bb(Them, s) & pos.pieces(Them, ROOK, QUEEN) & pos.attacks_from<ROOK>(s)))
unsafeSquares = squaresToQueen;
else
unsafeSquares = squaresToQueen & (ei.attackedBy[Them][0] | pos.pieces(Them));
unsafeSquares = squaresToQueen & (ei.attackedBy[Them][ALL_PIECES] | pos.pieces(Them));
// If there aren't enemy attacks or pieces along the path to queen give
// huge bonus. Even bigger if we protect the pawn's path.
@ -989,7 +989,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
// Compute plies to queening and check direct advancement
movesToGo = rank_distance(s, queeningSquare) - int(relative_rank(c, s) == RANK_2);
oppMovesToGo = square_distance(pos.king_square(~c), queeningSquare) - int(c != pos.side_to_move());
pathDefended = ((ei.attackedBy[c][0] & queeningPath) == queeningPath);
pathDefended = ((ei.attackedBy[c][ALL_PIECES] & queeningPath) == queeningPath);
if (movesToGo >= oppMovesToGo && !pathDefended)
continue;
@ -1136,7 +1136,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
Bitboard safe = SpaceMask[Us]
& ~pos.pieces(Us, PAWN)
& ~ei.attackedBy[Them][PAWN]
& (ei.attackedBy[Us][0] | ~ei.attackedBy[Them][0]);
& (ei.attackedBy[Us][ALL_PIECES] | ~ei.attackedBy[Them][ALL_PIECES]);
// Find all squares which are at most three squares behind some friendly pawn
Bitboard behind = pos.pieces(Us, PAWN);