Logic Masters Deutschland e.V.

Last week I woke up with the idea for this sudoku. The rules are similar to my older puzzles, but I think it's harder to find the starting point this time.

This puzzle is available online via F-Puzzles

RULES:
- Normal sudoku rules apply.
- In each cage, the sum of the odd digits equals the sum of the even digits. Digits may not repeat within a cage. In addition, all cages with an equal amout of cells contain a different combination of digits.
- Cells with a grey circle contain odd digits.