Mad as a Setter
(Published on 19. August 2026, 14:40 by Kjupatrick)
Mad as a Setter by Patrick Junke
Rules:
Place all of the digits from 1 to 9 in every row, column, 3-by-3 section, and dotted region.
Two orthogonally adjacent digits cannot sum to 3, 10, 12, or 17.
A dot between two digits indicates that their difference is 7 (green) or 3 (blue).
(Not all dots are given.)
Here is a link to a SudokuPad version of the grid.
Solution code: The nine digits of the last row from left to right
Comments
on 19. August 2026, 17:54 by GeorgeTheToad2
The colouring took over an hour and the digits took less than a minute at the end. Very enjoyable.
Patrick> Thank you! Yes, a last minute collapsing puzzle...
on 19. August 2026, 16:24 by palletpusher
Lovely puzzle; very interesting set of constraints. Did a full grid colouring, which is my favourite type of sudoku. Very enjoyable, thank you.
Patrick> Thank you for your nice comment.
