Pentominous by Prasanna Seshadri
or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between a composite mode for line/edge drawing and a letter entry mode.)
Theme: Clue Symmetry and Logic (Originally on the Indian Puzzle Championship).
Author/Opus: This is the 35th puzzle from our contributing puzzlemaster Prasanna Seshadri.
Rules: Divide the grid into 20 pentominoes so that no two pentominoes of the same shape (including rotations/reflections) share an edge. A cell with a letter in it must be part of the pentomino shape normally associated with that letter. An inventory of pentominoes is given below the puzzle but not all shapes must be used.
Answer String: Enter the letter associated with the pentomino occupying each cell in the two marked rows from left to right, separating the rows with a comma. Use CAPITAL LETTERS!
Time Standards (highlight to view): Grandmaster = 2:45, Master = 3:45, Expert = 7:30
Solution: PDF
Note: Follow this link for other puzzles involving Pentominoes.
Puzzle link [EDIT: Removed as we added our own official link to post]