Cave by Murat Can Tonta
or solve online (using our beta test of Penpa-Edit tools; use tab to shift between shading mode and the linex mode where left click+drag draws lines and right click marks X’s)
Theme: Primes
Author/Opus: This is the 14th puzzle from guest contributor Murat Can Tonta.
Rules: Standard Cave rules.
Answer String: Enter the length in cells of each of the cave segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma.
Time Standards (highlight to view): Grandmaster = 3:45, Master = 5:30, Expert = 11:00
Solution: PDF; a solution video is available here.
Note: Follow this link for other classic Caves. If you are new to this puzzle type, here are our easiest Cave Puzzles to get started on.