Pentominous (Borders) by Grant Fikes
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: Dead Ends
Author/Opus: This is the 385th puzzle from our contributing puzzlemaster Grant Fikes.
Rules: Variation of Pentominous rules. Some borders between pentominoes are already drawn.
Difficulty: 2 stars
Time Standards (highlight to view): Grandmaster = 1:40, Master = 2:30, Expert = 5:00
Solution: PDF and solving video.
Note: Follow this link for other Pentominous puzzles. If you are new to this puzzle type, here are our easiest Pentominous to get started on. More Pentominous puzzles can be found in the Plenty o’ Pentominous series by Grant Fikes and Murat Can Tonta and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.
Phew, just managed to get expert time, I struggled a bit in the upper right, but it was fun nonetheless!
7:38