Logic Masters Deutschland e.V.

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.

To play the puzzle, please click the image:

Initial Setter Difficulty: 2-2.5 / 5
(It was VERY tempting to ONLY list the above 'puzzle' as a 5/5.)

Puzzle Pack
With April Fools' Day falling on a Wednesday this year, it felt appropriate to have a little fun with this weeks epsiode. This is a small pack of 6x6 puzzles, using constraints that have appeared before, with a twist!
I really hope you enjoy.

Hint to start

5 in Row 1 cannot have a 1 above it, so must be psuedo satisfied by the clues themselves.

A bit more of a hint / spoiler

In every puzzle, the 5 in Row 1 has been given 2 options - Either with a 1 clue above it, or a 9 clue below it. There are no more shenanigans than that on Flat Mates.
A required logical deduction, is that all the other 5s need real 1s. As such, the 1 in R6 will always appear in the same column as 5 in R1.

Puzzle 1 of 4: Killer
- Normal 6x6 Sudoku rules apply.
- Dutch Flats: Every 5 in the grid must 'somehow' have a '1' directly above it or a '9' directly below it. It may have both, but it doesn't need both.
- Killer Cages: Digits in cages do not repeat and must sum to the indicated totals.

To play the puzzle, please click the image:

Puzzle 2 of 4: Diagonal Outside
- Normal 6x6 Sudoku rules apply.
- Dutch Flats: Every 5 in the grid must 'somehow' have a '1' directly above it or a '9' directly below it. It may have both, but it doesn't need both.
- Diagonal Outside: Clues outside the grid give digits that must appear in the first three cells, exactly once, in the indicated diagonal direction.

To play the puzzle, please click the image:

Puzzle 3 of 4: Renban
- Normal 6x6 Sudoku rules apply.
- Dutch Flats: Every 5 in the grid must 'somehow' have a '1' directly above it or a '9' directly below it. It may have both, but it doesn't need both.
- Renban: Each purple line contains a set of consecutive, non-repeating digits, which can appear in any order.

To play the puzzle, please click the image:

Puzzle 4 of 4: Full File Kropki
- Normal 6x6 Sudoku rules apply.
- Dutch Flats: Every 5 in the grid must 'somehow' have a '1' directly above it or a '9' directly below it. It may have both, but it doesn't need both.
- Full File Kropki:
Clues in a white circle indicate the exact number of white, Difference of 1, Kropki dots in their respective rows and columns.
Clues in a black circle indicate the exact number of black, Ratio 1:2, Kropki dots in their respective rows and columns.

To play the puzzle, please click the image:

Next Week
That's the end of the series I'm afraid, I'm retiring* from setting variant Sudoku.
(*I'm not, this is a terrible/obvious April Fools' attempt)

There will be guest setters the next two weeks!
GoodCity is working on a 'ytiCdooG' puzzle, whilst SennyK makes his series debut with his wonderful German Sums constraint.