-/// Position::move_attacks_square() tests whether a move from the current
-/// position attacks a given square.
-
-bool Position::move_attacks_square(Move m, Square s) const {
-
- assert(is_ok(m));
- assert(is_ok(s));
-
- Bitboard occ, xray;
- Square from = from_sq(m);
- Square to = to_sq(m);
- Piece piece = piece_moved(m);
-
- assert(!is_empty(from));
-
- // Update occupancy as if the piece is moving
- occ = pieces() ^ from ^ to;
-
- // The piece moved in 'to' attacks the square 's' ?
- if (attacks_from(piece, to, occ) & s)
- return true;
-
- // Scan for possible X-ray attackers behind the moved piece
- xray = (attacks_bb< ROOK>(s, occ) & pieces(color_of(piece), QUEEN, ROOK))
- | (attacks_bb<BISHOP>(s, occ) & pieces(color_of(piece), QUEEN, BISHOP));
-
- // Verify attackers are triggered by our move and not already existing
- return xray && (xray ^ (xray & attacks_from<QUEEN>(s)));
-}
-
-