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Theme: Clue Symmetry & Logic (prepared for the 2017 Puzzle Grand Prix)
Author/Opus: This is the 274th puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Connect each pair of identical numbers with a path passing through edge-adjacent cells. No cell may be used on more than one path.
Answer String: Enter the length in cells of the horizontal line segments from left to right in the marked rows, starting at the top. Separate each row’s entry with a comma.
Time Standards (highlight to view): Grandmaster = 1:30, Master = 3:30, Expert = 7:00 (*Estimates from competition scoring, not our usual process)
Note: Follow this link for other Loop/Path puzzles.