Theme: Refraction of Light
Author/Opus: This is the 229th puzzle from our contributing puzzlemaster Serkan Yürekli.
Rules: Standard Arrow Sudoku rules.
Answer String: Enter the 5th row from left to right, followed by a comma, followed by the 9th row from left to right.
Time Standards (highlight to view): Grandmaster = 3:00, Master = 4:30, Expert = 9:00