Theme: Square Numbers
Author/Opus: This is the 7th puzzle from guest contributor Joseph Howard.
Rules: Standard Pentominous rules. Additionally, there are some gray cells that do not contain any pentominoes. The numbers in these gray cells indicate how many pentomino regions are present in the 8 neighboring cells.
Answer String: Enter the letter associated with the pentomino occupying each cell in the marked columns from top to bottom, separating the two columns by a comma. Use CAPITAL LETTERS!
Time Standards (highlight to view): Grandmaster = 6:30, Master = 8:15, Expert = 16:30