Normal Sudoku rules apply.
Mixed dots: Digits separated by a black dot are either in the ratio (x*n)=y or (x^n)=y, where n is the number on the dot, and x and y are the two separated cells.
For example, a 2 next to a dot with the number 3 on it is either part of the equation 2*3, therefore the other cell should be 6, or 2^3, therefore the other cell should be 8.
Lösungscode: Column 5, top to bottom