Logic Masters Deutschland e.V.

Another birthday present puzzle, this time for Aspartacgus! He got it around his actual birthday, but I finally had a chance to upload it now.

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Rules- Normal sudoku rules apply.

- German Whispers - neighboring digits on a green German Whisper line differ in value by at least 5.

- Dutch Whispers - neighboring digits on an orange Dutch Whisper line differ in value by at least 4.

- XV sums - digits separated by X sum to 10; digits separated by V sum to 5. No negative constraint.

- Ratio Kropki - digits separated by a black Kropki dot have a ratio of 2:1. No negative constraint.

Sudokupad

Puzzle: