Logic Masters Deutschland e.V.

Rules:

Normal sudoku rules apply.

Ratio (Kropki) dots: Cells connected by a black dot must contain digits in a 1:2 ratio (for example, 3 and 6).

Renban Line: Numbers on this line must be consecutive, cannot repeat, and can appear in any order.

Palindrome line: Digits on a palindrome line read the same forwards and backwards.

German Whisper line: Two cells connected by a German Whisper line must have a difference of at least 5.

Whisper line: Two cells connected by a Whisper line must have a difference of at least 3.

Puzzle:

Keeping the (bi)cycle.

Word pun *wink wink*