/// pieces, according to the call parameters. Pinned pieces protect our king and
/// discovered check pieces attack the enemy king.
-Bitboard Position::hidden_checkers(Square ksq, Color c, Color toMove) const {
+Bitboard Position::hidden_checkers(Color c, Color kingColor) const {
Bitboard b, pinners, result = 0;
+ Square ksq = king_square(kingColor);
// Pinners are sliders that give check when a pinned piece is removed
pinners = ( (pieces( ROOK, QUEEN) & PseudoAttacks[ROOK ][ksq])
- | (pieces(BISHOP, QUEEN) & PseudoAttacks[BISHOP][ksq])) & pieces(c);
+ | (pieces(BISHOP, QUEEN) & PseudoAttacks[BISHOP][ksq])) & pieces(~kingColor);
while (pinners)
{
b = between_bb(ksq, pop_lsb(&pinners)) & pieces();
if (!more_than_one(b))
- result |= b & pieces(toMove);
+ result |= b & pieces(c);
}
return result;
}
// Checking
Bitboard checkers() const;
Bitboard discovered_check_candidates() const;
- Bitboard pinned_pieces(Color toMove) const;
+ Bitboard pinned_pieces(Color c) const;
// Attacks to/from a given square
Bitboard attackers_to(Square s) const;
// Helper functions
void do_castling(Square kfrom, Square kto, Square rfrom, Square rto);
- Bitboard hidden_checkers(Square ksq, Color c, Color toMove) const;
+ Bitboard hidden_checkers(Color c, Color kingColor) const;
void put_piece(Square s, Color c, PieceType pt);
void remove_piece(Square s, Color c, PieceType pt);
void move_piece(Square from, Square to, Color c, PieceType pt);
}
inline Bitboard Position::discovered_check_candidates() const {
- return hidden_checkers(king_square(~sideToMove), sideToMove, sideToMove);
+ return hidden_checkers(sideToMove, ~sideToMove);
}
-inline Bitboard Position::pinned_pieces(Color toMove) const {
- return hidden_checkers(king_square(toMove), ~toMove, toMove);
+inline Bitboard Position::pinned_pieces(Color c) const {
+ return hidden_checkers(c, c);
}
inline bool Position::pawn_passed(Color c, Square s) const {