Logic Masters Deutschland e.V.

Rules:

Sudoku: Normal sudoku rules apply. The digits 1-9 appear once in each row, column, and 3x3 box.

Rings: The lines associated with the five colored rings have different restrictions.
Blue - Region boundaries create segments with the same sums.
Black - Digits strictly increase as they move away from the ring.
Red - Adjacent digits differ by at least four.
Yellow - Digits along the line read the same backward and forward.
Green - Adjacent digits differ by at least five.

Medals: Digits along the arrows sum to the total in that arrow’s medal.
Digits in medals are even.
The gold medal contains a digit greater than the silver and the silver medal contains a digit greater than the bronze.

Extra Region: The cells with rings, medals, and the flame make a set of the digits 1-9.

To Play:
SudokuPad