Nanro (Signpost) by Murat Can Tonta
or solve online (using our beta test of Penpa-Edit tools; use the tab key to alternate between shading and number entry modes)
Theme: Tetromino Tiling
Author/Opus: This is the 134th puzzle from our contributing puzzlemaster Murat Can Tonta.
Rules: Variation of Nanro.
Label some cells with numbers to form a single connected group of labeled cells. No 2×2 group of cells may be fully labeled. Each number must be equal to the total count of labeled cells in that bold region, and all bold regions contain at least one labeled cell. The given numbers indicate how many cells are labeled in that region (but not necessarily which cells are labeled). When two numbers are orthogonally adjacent across a region boundary, the numbers must be different.
Also see this example:
Answer String: Enter the length in cells of each of the segments labeled with numbers from left to right for the marked rows, starting at the top. Separate each row’s entry from the next with a comma.
Time Standards (highlight to view): Grandmaster = 3:15, Master = 4:15, Expert = 8:30
Solution: PDF
Note: Follow this link for Nanro puzzles on this website and this link for variations on Nanro puzzles. If you are new to this puzzle type, here are our easiest Nanro Puzzles to get started on. More Nanro puzzles can be found in A Number o’ Nanro by Prasanna Seshadri.
This has a nice solution “path”.
Was making fast progress until a certain point in the solve. Finished with postulation, and so only managed to get 4:57.
I now realise I missed a simple bit of logic involving a group of cells being cut off. I won’t be becoming a GM anytime soon!
4:56.Superb !