Logic Masters Deutschland e.V.

Rules:

Normal sudoku rules apply. Digits in orthogonally adjacent cells connected by
- a V sum to 5
- an X sum to 10
- a white dot are consecutive
- a black dot have a 1:2 ratio
All clues within the enclosed area are shown (but not necessarily those outside the area or on its boundary).

Play with SudokuPad

If you are familiar with this variant, the puzzle shouldn't be hard. If not, below is a hint in case you struggle to find the break-in (highlight white text to read):

How does an empty box look like? Start with the most restricted digit.