One line results in a "mirror model mate". This type of mate requires that (a) none of the eight squares around the king are occupied; (b) each of the eight squares is attacked by only one White piece or pawn; (c) all of White's pieces (with the possible exception of king and pawns) participate in the mate.
The usual reaction to such a position is, "Wait! Is that really mate?"
The usual reaction to such a position is, "Wait! Is that really mate?"