Square s = pop_1st_bit(&b);
Square queeningSquare = relative_square(c, make_square(square_file(s), RANK_8));
int d = square_distance(s, queeningSquare)
Square s = pop_1st_bit(&b);
Square queeningSquare = relative_square(c, make_square(square_file(s), RANK_8));
int d = square_distance(s, queeningSquare)
- square_distance(pos.king_square(opposite_color(c)), queeningSquare)
+ int(c != pos.side_to_move());
- square_distance(pos.king_square(opposite_color(c)), queeningSquare)
+ int(c != pos.side_to_move());