Logic Masters Deutschland e.V.

Additional constraints digits:

• German Whispers: Adjacent digits along a green line must differ by at least 5.
• Sandwich: Clues outside the grid give the sum of digits between 1 & 9 in that row or column.
• Kropki: Digits in cells separated by a white dot must be consecutive.

Coloring is only cosmetical.

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 do not repeat and 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 3 here.