// problem, especially when that pawn is also blocked.
if (s == relative_square(Us, SQ_A1) || s == relative_square(Us, SQ_H1))
{
- SquareDelta d = pawn_push(Us)
- + (square_file(s) == FILE_A ? DELTA_E : DELTA_W);
+ Square d = pawn_push(Us) + (square_file(s) == FILE_A ? DELTA_E : DELTA_W);
if (pos.piece_on(s + d) == piece_of_color_and_type(Us, PAWN))
{
if (!pos.square_is_empty(s + d + pawn_push(Us)))
// 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
// the squares in the pawn's path attacked or occupied by the enemy.
- if ( (squares_behind(Us, s) & pos.pieces(ROOK, QUEEN, Them))
- && (squares_behind(Us, s) & pos.pieces(ROOK, QUEEN, Them) & pos.attacks_from<ROOK>(s)))
+ if ( (squares_in_front_of(Them, s) & pos.pieces(ROOK, QUEEN, Them))
+ && (squares_in_front_of(Them, s) & pos.pieces(ROOK, QUEEN, Them) & pos.attacks_from<ROOK>(s)))
unsafeSquares = squaresToQueen;
else
unsafeSquares = squaresToQueen & (ei.attackedBy[Them][0] | pos.pieces_of_color(Them));