Author/Opus: This is the 15th puzzle from guest contributor Bryce Herdt.
Rules: Place some of the given pentominoes in the grid so that no pentominoes are in adjacent cells that share an edge or corner. Pentominoes cannot repeat in the grid; rotations and reflections of a pentomino are considered the same shape. The arrow clues indicate all the directions (up, down, left, and right) where the nearest pentominoes are located when looking from that square. Also, see this example:
Difficulty: 2.5 stars
Time Standards (highlight to view): Grandmaster = 2:45, Master = 4:45, Expert = 9:30