Dutch Flat Mates: Minimum Lines
(Published on 12. August 2026, 07:00 by Jobo)
Hello, enjoy this puzzle!
All feedback and comments will be much appreciated!
Happy to return as a guest setter for the Dutch Flat Mates series by Flinty, this time with Minimum lines!
Maximum lines should come along soon.. :)
Rules:
- Normal sudoku rules apply.
- Every 5 in the grid must have a '1' directly above it or a '9' directly below it. It may have both, but it doesn't need both.
- Digits on a lime green line can never be lower than the length of the line.
Browse previous Dutch Flat Mates puzzles on LMD here.
A spreadsheet for all previous puzzles in the series can be found here.
Solution code: Row 7.
Comments
on 12. August 2026, 14:09 by Franjo
Thank you very much for creating and sharing this beautiful DFM-puzzle. Interesting constraint!
on 12. August 2026, 13:34 by sujoyku
Thank you for this fun DFM puzzle, Jobo!
on 12. August 2026, 13:27 by Flinty
Very nice, thank you! :)
on 12. August 2026, 12:40 by galium_odoratum
Fun puzzle, but not that smooth for me. Maybe it was just my scanning, but I had some finding the needle in the haystack situations where I just happened not to look in the right places. I like the ruleset though, the max lines are quite elegant.
on 12. August 2026, 09:36 by Saltensity
Always love the DFM constraint, thanks for sharing!
on 12. August 2026, 08:17 by Piatato
Smooth one, thanks!
