Logic Masters Deutschland e.V.

The Rules:

• Normal sudoku rules apply.
• Black dots indicate that the adjacent digits are in a ratio of 2:1. Not all black dots are given.
• The digits on the grey line form a palindrome.
• The digits on the purple Renban line must be a consecutive set of digits, but may appear on the line in any order.
• Adjacent digits on the green German whispers line must have a difference of at least 5.
  Flying Bow Ties

  by Chilly

  

  Link for solving on f-puzzles