Logic Masters Deutschland e.V.

I hope you will enjoy my eighth puzzle!
I would be really grateful for all the comments and ratings.

Normal sudoku rules apply.

Diagonals: Digits along the marked diagonals must not repeat.

Kropki dots: Digits in cells joined by a white dot have a difference of 7. All white dots are given. Digits in cells joined by a black dot are in a 1:2 ratio (i.e., one digit will be double the other). Not all black dots are given.

X/V: Digits in cells joined by an X sum to 10. Digits in cells joined by a V sum to 5. Not all Xs and Vs are given.

Quadruples: Every digit in a big white circle has to be assigned to one of the surrounding cells.

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