Theme: Clue Symmetry and Logic
Author/Opus: This is the 10th puzzle from guest contributor Chris Green.
Rules: Standard LITS rules. Also, the letters outside the grid indicate the first tetromino encountered in the corresponding direction. Or see this:
Answer String: Enter the length in cells of each of the shaded segments from left to right for the marked rows, starting at the top. Separate each row’s entry from the next with a comma.
Time Standards (highlight to view): Grandmaster = 3:00, Master = 4:00, Expert = 8:00