Logic Masters Deutschland e.V.

Normal sudoku rules apply. In cages, digits must sum to the small clue given in the top left corner of the cage (if given). Digits cannot repeat within a cage. Cells with a circle inside them must contain an odd digit. Cells separated by a white dot contain consecutive digits. Cells separated by a red dot must not contain consecutive digits or digits in a ratio of 2:1. Not all possible dots are given.

Link: f-puzzles