Logic Masters Deutschland e.V.

Place the digits 0-9 in the grid such that no digit repeats in any row, column, or region.
Create regions that are all different sizes, each region must be L shaped. A region of size N, must contain the digits 0 through N-1.
A cell with a circle in it, is the corner of a region and the digit in the circle indicates the difference between the lengths of the two legs of that region.
Two cells a chess knight’s move apart may not contain the same digit.
On a black dot, one digit is double the other.
On a white dot, digits are consecutive.

Solve in SudokuPad

See below for an example of a "L shaped region" as well as the circle in the corner of the region indicating the difference between the lengths of the two legs.