From the Foxger’s Den #62: Fillomino
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 number entry mode.)
Theme: Lambda
Rules: Standard Fillomino rules.
Answer String: For each cell in the marked rows/columns, enter the area of the polyomino it belongs to. Start with the 7th row, followed by a comma, followed by the 6th column.
Time Standards (highlight to view): Grandmaster = 2:30, Master = 4:00, Expert = 8:00
Solution: PDF
Note: Follow this link for other classic Fillomino and this link for more variations on Fillomino puzzles. If you are new to this puzzle type, here are our easiest Fillomino puzzles to get started on.
Nice used of hidden/implied polyominos to force the solve. I was staring at the puzzle not sure how it was possibly going to come together, and then noticed just one key cell…
Nice job with the open middle area.