Author/Opus: This is the 1st puzzle from guest contributor William Hu.
Rules: Standard Masyu rules.
Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.
Time Standards (highlight to view): Grandmaster = 0:35, Master = 0:50, Expert = 1:40