Theme: Clue Symmetry and Logic
Author/Opus: This is the 133rd puzzle from our contributing puzzlemaster Serkan Yürekli.
Rules: Standard Tight Fit Sudoku rules with digits from 1-9. Also, digits cannot repeat in diagonally adjacent cells (both digits in any “tight fit” cell are considered when checking presence in a diagonally adjacent cell).
Answer String: Enter the 3rd row from left to right, followed by a comma, followed by the 5th row from left to right. (Note: for the tight fit cells, enter the top before the bottom as would be normal for the read order.)
Time Standards (highlight to view): Grandmaster = 3:30, Master = 4:30, Expert = 9:00