Logic Masters Deutschland e.V.

Rules: Put the digits 0 to 9 once each in each row column and box. To make this possible, some cells (to be discovered) are Schrödinger cells that contain two values. For the purposes of the arrows these cells act as the sum of their two digits.
Arrows: Digits along arrows must sum to the digit (or sum of digits) in that arrow's circle.

Link:
CtC App: https://tinyurl.com/5n88uvk8