Round Trip by Bryce Herdt
or solve online (using our beta test of Penpa-Edit tools; in default linex mode: left-click+drag draws line, right click marks X on edge)
Theme: Speed of Light and Speed of Sound
Author/Opus: This is the 20th puzzle from guest contributor Bryce Herdt.
Rules: Draw a single loop in the grid which may cross itself orthogonally, but otherwise does not touch or retrace itself. The clue numbers to the left/right of the rows indicate the number of squares visited by the nearest section of the loop that travels horizontally in the rows. The clue numbers to the top/bottom of the columns indicate the number of squares visited by the nearest section of the loop that travels vertically in the columns.
Also, see this example:
Difficulty: 3 stars
Time Standards (highlight to view): Grandmaster = 2:45, Master = 5:15, Expert = 10:30
Solution: PDF; a solution video is also available here.
Note: Follow this link for other Round Trip puzzles. Some more Round Trip puzzles can be found in the book Loop Variety Collection by Ashish Kumar and Murat Can Tonta.
Very tricky puzzle … finally cracked after some trial and error…
15mins..Nice .Nibvqvat pybfrq ybbcf (rot13) helped primarily in the solve.
Great puzzle!
I must have erased this puzzle like 5 times before finally managing to solve it. There were just so many implicit incorrect assumptions that I have been making.