Logic Masters Deutschland e.V.

This ruleset has been previously used by Nylimb in their fantastic series "Sums are products", of which #2 is a true masterpiece.
Although multiplication lies at the heart of the ruleset, the maths are actually quite simple here and in Nylimb's puzzles as well. Have fun!

Rules:

Normal sudoku rules apply. Digits cannot repeat within a cage. Whenever two cages share an edge, the digits in one cage sum to the product of the digits in the other.

Play with SudokuPad