Tight Fit (Unique) Sudoku by Serkan Yürekli
or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between Sudoku = big digits and Number candidate = small entries in the corners of cells.)
Theme: Clue Symmetry and Logic
Author/Opus: This is the 240th puzzle from our contributing puzzlemaster Serkan Yürekli.
Rules: Standard Tight Fit Sudoku rules (in all slashed cells, a smaller digit must be placed above a larger digit). In this variation, all of the slashed cells must also have a unique pair of digits inside them.
Answer String: Enter the 3rd row from left to right, followed by a comma, followed by the 6th 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 = 4:00, Master = 6:00, Expert = 12:00
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.
5:43.Some nice deductions in between the solve.
I always enjoy Tight Fit Sudoku more when there’s a variety of number pairs, so it’s nice to see a variant that makes that the focus.
Geez, Paul, read *all* the rules and maybe you won’t end up stuck for days.