Logic Masters Deutschland e.V.

Standard Star Killer Sudoku rules apply (see below).

Additional constraints on placement of stars:

• The value of each star can be determined by it's relative position inside their respective box, read from top-left to bottom right. The picture below shows the exact value each star must have depending on it's position.

Additional constraints on values:

• Difference: Digits in cells separated by a white dot must differ by the given digit inside that dot.

Star Killer Rules:
Place exactly two stars into each row, column and box. Stars may not share an edge (no diagonal constraint!). The number in the top-left corner of a cage (if given) gives you the number of stars, that are outside of the cage and share an edge with that cage.
Digits in a cage sum to the total X. The number in the top-left corner of a cage must be equal to the digit sum of X.

Solve online.

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This puzzle is part of a series consisting of 12 puzzles. The series doesn't necessarily has to be solved in the intended order. If you're willing to attempt the whole series you can find part 1 here.

You can continue with part 9 here.