or solve online (using our beta test of Penpa-Edit tools; use the tab key to alternate between shading and number entry modes)
Author/Opus: This is the 21st puzzle from guest contributor Bryce Herdt.
Rules: Variation of Nanro rules. Label some cells with numbers to form a single non-intersecting loop; no 2×2 group of cells may be fully labeled, but the loop may touch itself orthogonally or diagonally. The region boundaries divide the loop into segments, and each region must have at least one segment. Numbers denote the length in cells of each segment within a region; all numbers in a region must be the same. When two numbers from different segments are orthogonally adjacent, the numbers must be different. (Consequently, segments in the same region must not share an edge.)
Also see this example:
Difficulty: 4.5 stars
Time Standards (highlight to view): Grandmaster = 5:00, Master = 12:30, Expert = 25:00
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.