Logic Masters Deutschland e.V.

Rules: Put the digits 1 to 9 into each box such that no digits repeat in any row or column.
Region Sum Lines: The sum of the digits on a blue line within a box must be the same for each box that line passes through. The two region sum lines are different shades of blue to clarify crossings.
Thermo: Digits on the thermometer increase from the bulb end.
Renban: The purple line in box 2 contains a set of consecutive, non-repeating digits in any order.
Arrow: Digits on the arrow sum to the digit in the arrow circle.
Whispers: Adjacent digits on the green line in box 4 differ by at least 5.
Dots: Digits on a black dot are in a 1:2 ratio.

Links:
SudokuPad: https://tinyurl.com/42x6avb5