Featured Puzzle: One or All #1 – Monster Mash

After a late night working in the lab, you looked out from the balcony and found an eerie sight! Three local monsters have begun arranging themselves into groups. The rules seem pretty simple, but where will the rest go?

• The grid is divided into 3-cell “rooms.” All cells are filled with one monster.
• Each room has either three monsters of the same type, or one each of the three different monsters.
• Orthogonally adjacent cells in different rooms may not contain the same monster.