Dutch Flat Mates (Ten Lines)
(Published on 24. January 2024, 11:30 by Flinty)
Previous Dutch Flat Mate Puzzles
This has been a weekly series since '18 Oct 23'. Here is a spreadsheet link for all the previous puzzles in the series, which also has a few teasers for upcoming constraints/guest setters in the series (subject to change).
This alternative link offers a limited LMD search for Dutch Flat Mates.
Normal Sudoku rules apply
Place the digits 1-9 so that they do not repeat in any row, column, or 3x3 box.
Dutch Flats
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.
Ten Lines
Each line consists of one or more contiguous groups of cells, each of which sums to 10. These groups of cells cannot overlap. Digits may repeat on lines and even within sums.
To play this puzzle please click here: Play CTC
Ten Lines
Please see below for examples of a valid Ten Line fill:
- 4+6, 5+5, 3+2+5 all sum to 10.
- 7+3, 9+1, 2+8 all sum to 10.
Solution code: Digits from Row 8
Comments
on 9. October 2025, 13:47 by Flinty
Refreshed LMD page, link and rules.
on 20. February 2025, 18:45 by Richard
On the harder side of 2 stars difficulty and a lot of fun!
on 2. May 2024, 23:14 by wuc
2.5 star for me. Nice setting thx.
on 5. April 2024, 12:46 by sorryimLate
It was so fun solving the ten lines that I forgot about the flat mates constraint until I was almost finished and got stuck. Very nice!
on 9. February 2024, 00:08 by ViKingPrime
I honestly found this the hardest of the series so far. Beautiful setting but challenging.
on 30. January 2024, 17:14 by gdc
love some some ten lines. Very nice and surprising interactions with the dutch flatmates.
on 24. January 2024, 22:46 by nunc
I always forgot about the Dutch Flat Mates rule (read the title, buddy!). Would have made the puzzle much easier, I guess...
Very nicely set, thank you!
on 24. January 2024, 18:41 by goodcity
Really nice puzzle ! Thank you Flinty for setting and gdc for the idea.
on 24. January 2024, 17:35 by Qashqai4eg
I am not sure if I have solved in the expected way, but several points were very nice, including the break in box 1.
on 24. January 2024, 14:44 by Ragna
Fun puzzle. Tricky and very elegant! Thank you for sharing. :-)
