Dutch Flat Mates: Summing Up
(Published on 17. June 2026, 07:00 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.
Special Thanks
The original inspiration for this puzzle was part of the Easy Peasy Sudoku Advent series by Richard:
Easy Peasy Sudoku Advent (22) - Summing Up (2/5).
To play the puzzle, please click the image:
Puzzle Link: Click Here
Initial Setter Difficulty: 2-2.5 / 5
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.
Summing Up
Clues outside the grid indicate the sum of the group of ascending digits from that side with the largest sum in that respective row or column.
Hint to start
Where can 9 go in C5?
The clues facing each other are larger than 45, how can that work?
Next Week
I'm delighted to say that Marty Sears has GIVEN more of his time to the Dutch Flat Mates series, and I certainly don't EIGHT (hate) everything about this puzzle, in fact there are MULTIPLE reasons to love it!
Solution code: Row 5 Digits
Comments
on 19. June 2026, 17:22 by ThePedallingPianist
Very nice feature of this ruleset, and lovely interactions with DFM of course!
on 19. June 2026, 09:33 by Flinty
Slight rules tweak for clarity. Thank you DomDaBomb.
Second old link if useful: https://sudokupad.app/ubczrgv5z5
on 18. June 2026, 14:10 by Flinty
Slight rules tweak for clarity.
From: Clues outside the grid indicate the maximum sum of a group of connected ascending digits from that side in the respective row or column.
To: Clues outside the grid indicate the sum of the largest group of connected ascending digits from that side in the respective row or column.
Old link: https://sudokupad.app/hoichilf47 - but any progress should transfer to the new link.
on 17. June 2026, 16:41 by Franjo
Thank you very much for creating and sharing another lovely DFM-puzzle.
