Sudoku Variants Series (453) - S-Doku
(Published on 26. December 2025, 06:00 by Richard)
For this Sudoku Variants Project I have planned to publish a unique Sudoku variant every week.
S-Doku
Inspiration for this type comes from Dutch Sudoku Championship 2023.
Solve online in
I will see how long it takes before I am running out of ideas.
Apply classic sudoku rules.
The three rows and three columns of three 3x3 blocks contain each nine grey cells in which the digits 1-9 have to appear exactly once too. (Example: R3C1+R2C2+R1C3-7+R2C8+R3C9.)
Sudokupad (no answer check)
Sudokupad (with answer check)
or
Penpa+.
Solution code: Column 4
Comments
on 27. December 2025, 14:42 by Franjo
Thank you very much for creating and sharing another lovely SVS-puzzle.
on 26. December 2025, 21:47 by geronimo92
Thanks a lot Faltenin i didnt understand the ruleset at all before reading your comment
on 26. December 2025, 19:40 by dzamie
Surprisingly easy! It's neat to see Extra Regions overlapping so heavily (six sets of bonus regions, with each cell belonging to exactly two of them).
on 26. December 2025, 18:18 by HeyItsErin
Really enjoyable flow on this one!
on 26. December 2025, 16:15 by faltenin
Very nice - I did find the instructions confusing at first. Basically, the grey cells of the top three rows are a set of 1-9; same for the next and last three, and same for columns.
