This is a bonus Sunday puzzle for Valentine’s Day, and one more puzzle to conclude a full week of puzzles from JinHoo Ahn.
or solve online (using our beta test of Penpa-Edit tools)
Author/Opus: This is the 18th puzzle from our contributing puzzlemaster JinHoo Ahn.
Rules: Standard Masyu rules. Also, some white circles may be shaded to become black circles. (Stylistically, here the white circles are white with red borders and the black circles are filled, red circles.)
Difficulty: 4 stars
Time Standards (highlight to view): Grandmaster = 3:30, Master = 8:00, Expert = 16:00
Note: Follow this link for other Masyu variations and this link for classic Masyu. If you are new to this puzzle type, here are our easiest Masyu to get started on. More Masyu puzzles can be found in The Art of Puzzles.