Logic Masters Deutschland e.V.

Rules:

Normal sudoku rules apply.

Digits separated by a black dot have to be in a 1:2 ratio. Digits separated by a white dot have to be consecutive. (Kropki rules)

Digits in squares have to be coprime with every orthogonal neighbor. For example, if r2c2 is a 6, digits in r1c2, r2c1, r2c3, and r3c2 have to be from the set 1, 5, 7. 1 is considered to be co-prime with every number.

Digits along grey lines have to all have a common divisor other than 1. Digits can repeat if allowed by other rules.

Link to f-puzzles

Link to sudokupad