Logic Masters Deutschland e.V.

Lode5tone (DFM Sandwich sudoku)

(Published on 4. October 2026, 06:00 by udukos)

Hello! It's been a while. This puzzle is a combination of Dutch Flat Mates and Sandwich sudoku. I created it after solving a few puzzles with this ruleset, without realizing that it was part of a weekly series by Flinty. Congratulations to them on such a successful and long-running series! Entry into the puzzle doesn't require trial and error.


Normal Sudoku rules apply.

The clues outside the grid are equal to the sum of the numbers located between 1 and 9 in that row or column. 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.

Links to the puzzle for solving online: Penpa plus or Sudokupad

Have fun! :)

Solution code: Row 8


Solved by jalebc, Piatato, PluckyVillain, damo_89, ZornsLemon, marcmees, SKORP17, PippoForte, nevermore, Jesper, Qodec, kangaroo, palletpusher, Playmaker6174
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Comments

today, 02:52 by Playmaker6174
Very involved opening sequence and a rewarding solve overall, great use of the DFM theme throughout the solve!
Also I'm super glad to see another puzzle from you again x)

Last changed on 6. October 2026, 23:27

on 6. October 2026, 23:27 by Qodec
Very mature puzzle: enjoyable, crisp deductions, and a beautifully smooth collapse at the end. Welcome back!

on 6. October 2026, 09:21 by Jesper
Great puzzle, entertaining solve path

on 4. October 2026, 19:57 by marcmees
Tasty DFM sandwich. Thanks

on 4. October 2026, 13:23 by damo_89
Lovely. Break in really involved putting together a bunch of clues plus flatmates, not sure if I found the intended way but it worked!

on 4. October 2026, 09:35 by Piatato
Fun and smooth puzzle! Happy to see you back! :D

Difficulty:3
Rating:95 %
Solved:14 times
Observed:1 times
ID:000VAX

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Solution code:

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