Theme: Clue Symmetry and Logic
Author/Opus: This is the 110th puzzle from our contributing puzzlemaster Prasanna Seshadri.
Rules: Standard Cave rules. Also there are two windows in the upper left (blue) and lower right (red) of the grid. The cells in the same position in these windows must have the exact opposite shading (i.e., those inside the cave in one window are outside the cave in the other window).
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 = 2:00, Master = 2:45, Expert = 5:30