Logic Masters Deutschland e.V.

Normal sudoku rules apply. Place the digits 1-10 in each row, column, and box. Each digit from 1-9 is replaced exactly once each with the value 10.
Digits in cages sum to the total in the corner. Digits on an arrow sum to the digit in the circle. Digits on a purple renban line form a consecutive sequence, not necessarily in order.
Cells connected by a black dot are in the ratio 2:1. Cells connected by a white dot are consecutive. Not all dots are given.

Links:

CTC
F-Puzzles