Logic Masters Deutschland e.V.

- Normal 6x6 Sudoku rules always apply.
- Each grid is a "donut" and wraps around, i.e. the top and bottom rows are considered adjacent, as are the left and rightmost columns.
- Click on a puzzle image to play!

1. Kropki Donuts
Adjacent digits on a vanilla donut have adjacent values. Adjacent digits on a chocolate donut have values in a 2:1 ratio.


2. Renban Donuts
Digits on a strawberry donut form a consecutive non-repeating set.


3. Region Sum Donuts
Box borders divide a blue donut into sections with the same sum. Also, some donuts have been cut in half; two halves of the same donut have the same sum.


4. Donut King
Each cell sees at least one other cell a king's move away that contains the same digit.


5. All Donuts Are Beautiful
All rules from previous puzzles apply!