Grouping All but One
(Published on 8. February 2026, 14:31 by Sneppix)
Grouping All but One
Rules:
- Normal sudoku rules apply.
- Divide all cells in the grid except for r9c7 (the grey cell) into groups of orthogonally connected cells. Every group contains exactly one cell with a white square. The digit in a square cell, N, indicates the number of cells in that group. N will either be the largest or the smallest digit in its group, and digits within a group may not repeat. r9c7 is not in any of the groups and may be any digit, but is still affected by normal Sudoku rules.
- As an example, a square cell containing a 4 is in a group of 4 orthogonally connected cells consisting of unique digits that are all either at most 4 or at least 4.
- Digits separated by a white dot are consecutive and are in different groups.
Have fun!
Solution code: Row 5, left to right
Solved by ArtsiBurger, SKORP17, mmcy123, Snookerfan, Da Letter El, alfalfa, Guvenistan, snowbaby, Gnosis66, Fool on Hill, arctan, samuel1997, QuiltyAsCharged, emoney1374, mew_rocks, madhupt, Khatru, alta1r, Zzzzz..., BlazingSnow, nixxo
Comments
yesterday, 02:05 by QuiltyAsCharged
Astonishing!
on 15. February 2026, 23:32 by samuel1997
The fact that this puzzle has a unique solution and a humanly solvable path is just mind-blowing!! Fascinating! Thank you.
Last changed on 9. February 2026, 11:32
on 9. February 2026, 11:29 by Snookerfan
Brilliant puzzle! Lots of meta logic to get started and then a superb solve path by well placed clues. The only thing I missed, which took me a lot longer to solve the puzzle, was filling in the value of R9C7 by meta logic instead of leaving it to sudoku. Thanks
