Logic Masters Deutschland e.V.

My second puzzle in my series of using constraints to attempt to create entertaining themes.

In this entry, I wanted to set a puzzle with the constraint that each instance of an element cannot share any digits with another instance of the same element. Due to the strength of this constraint its not the most tricky puzzle, but still entertaining, I think.

- Sudoku: Normal sudoku rules apply.
- Unique black Kropki: Cells joined by a black Kropki dot have a ratio of 1:2. Any numbers seen in one instance of a black Kropki dot cannot be seen in another instance of a black Kropki dot.
- Unique white Kropki: Cells joined by a white Kropki dot are consecutive. Any numbers seen in one instance of a white Kropki dot cannot be seen in another instance of a white Kropki dot.
- Killer cage: Digits in a cage must sum up to the digit in the top left of the cage and cannot repeat.
- Unique Renban: The purple Renban line contains a set of consecutive digits in any order. Digits appearing in one Renban line cannot appear in another Renban line.
- Unique German Whispers: Any cells joined by a green German Whispers line must have a difference of at least 5. Digits appearing in one German Whispers line cannot appear in another.
- Unique Region Sum: For each blue line, digits have an equal sum for each box they pass through. Digits seen in one region sum line will not appear in another seperate region sum line.
- Unique X sum: Cells connected by an X must sum to 10. Different instances of the X sum cannot have the same resolution.

Play it on Sudokupad here.