Theme: Think Positive (there are no zero clues)
Author/Opus: This is the 164th puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Combination of Slitherlink and Masyu rules.
Specifically, draw a single closed loop by connecting neighboring dots horizontally or vertically so that each number represents the number of adjacent edges used by the loop. The loop passes through all large circles. It must go straight through the white circles with at least one side turning at the next dot; it must turn at the black circles and then go straight through the next dot in both directions.
Answer String: Enter the length in cells of each of the internal loop 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 = 3:30, Master = 5:15, Expert = 10:30
Note: Follow these links for other Slitherlink variations and Masyu variations. Or follow these links for classic Slitherlink and classic Masyu puzzles.