Logic Masters Deutschland e.V.

Rules: Normal Sudoku rules apply. Place the digits 1 to 9 once each in each row, column and box.
Renban: Purple lines contain a set of consecutive digits in any order.
Anti-Renban: Blue lines contain a set of non-repeating digits, no two of which are consectutive (e.g. if there is a 3 on the line, 2 and 4 could not appear on the line).
Ratio: Black dots indicate two cells that are in a ratio of 1 to 2. All dots are given (negative constraint applies).

Links:
F-Puzzles: https://f-puzzles.com/?id=yb2caaur
CtC App: https://tinyurl.com/mr4c78t9