Logic Masters Deutschland e.V.

I was just messing around in the custom constraint editor and this had a valid solution. Unfortunately, this is beyond my skill level to solve, but I spent enough time on it that I am going to release it nonetheless

Normal sudoku rules apply (1-9 in every row, column, box without repeats)

Chinese Whispers: Digits connected by the red line have a difference of at most 2

Zipper Lines: Pairs of digits on the purple lines equidistant from the center have the same sum. If a digit is on the center dot, the digit is that sum.

Ten Lines: Each thin, sickly green line consists of one or more non-overlapping segments, each of which consists of digits summing to 10

Red "Kropki" dots: Digits separated by a red "Kropki" dot are coprime. That is, they have a greatest common factor of 1. Not all dots are given

Click image to play