The grid represents a mirror maze with mirrors and some combination of ghosts, vampires, and zombies. Use the numbers of people seen from outside the maze to determine what entity each dot represents. If a puzzle contains a set of shaded squares, all of the squares contain the same entity type - all ghosts, all vampires, or all zombies.
A vampire can be seen head on from the edge of the maze, but cannot be seen as a reflection in a mirror. A ghost cannot be seen head on from the maze edge; only as a reflection. Zombies can be seen head on as well as in mirrors as reflections.

