Logic Masters Deutschland e.V.

Normal sudoku rules apply.
Digits separated by a white dot are consecutive.
Digits separated by a black dot have a 1:2 ratio.
Digits cannot repeat within a cage.
Some cages show their sums.
Each cage's sum is equal to the sum of two other cages in the grid; however, cages with the same sum cannot be the same size (i.e. if the solver deduces that there is a cage that sums to X, then there must be two other cages that also sum to X, and all three of those cages must occupy a different number of cells).

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