Duality: Modular Ten Lines
(Published on 25. February 2026, 09:14 by NotVeryNeat)
For Scojo's weekly setting prompt, combining duality and quadruples. Enjoy!
Rules:
Normal sudoku rules apply.
Quadruples: Digits in white circles must be present at least once in the cells the clue touches.
Duality: All lines are both Modular lines and Ten lines. Ten lines contain digits that can be broken into one or more non-overlapping contiguous groups that sum to ten. Any run of three consecutive cells on a modular line must contain three digits with different remainders divided by 3, i.e. one from (1, 4, 7), one from (2, 5, 8), and one from (3, 6, 9). Lines of length two only need to contain two different modular groups.
Sudokupad
Solution code: Row 5
Comments
yesterday, 18:21 by Franjo
Thank you very much for creating and sharing this funny puzzle.
yesterday, 16:55 by VitP
experienced solvers will be able to do this fairly easily. no advanced TECHNIQUES are needed.
however, you need to be able to RECOGNIZE certain PATTERNS that exist in modular lines and 10 lines, and that can only be obtained from EXPERIENCE.
hint: 258 are restricted
yesterday, 08:15 by Lor
Tricky lines... Loved it.
yesterday, 03:55 by Crusader175
Fun puzzle!
