Broken Sign Blog
#034: FourCells
15 September 2022After clearing all FourCells puzzles in the database, I wanted to try constructing one with logic I hadn’t seen in any of the puzzles I solved. Here is the result. Fair warning, it’s probably on the harder side.
Note for people not solving via puzz.link, the thick-bordered cell in the centre is not part of the grid.
Solve it online:
Rules: Divide the grid into regions of four orthogonally connected cells. Clued cells must have the indicated number of region borders or grid borders surrounding them.