PDF

or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between Sudoku = big entries and Number candidate = small entries in the corners of cells.)

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

Solution: PDF

Note: Follow this link for other Tight Fit Sudoku puzzles on this website. If you are new to this puzzle type, here are our easiest Tight Fit Sudoku to get started on. More Tight Fit Sudoku can be found in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli and in The Art of Sudoku 2.