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: Clue Symmetry and Logic
Author/Opus: This is the 49th puzzle from our contributing puzzlemaster Murat Can Tonta.
Rules: Standard Cave rules. Also, an even number of cells in each row and in each column must be inside the cave.
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 = 3:15, Master = 6:30, Expert = 13:00