Normal sudoku rules apply. Any three adjacent digits along a yellow line include one digit from each entropy group, i.e. one digit from [1,2,3], one digit from [4,5,6] and one digit from [7,8,9]. If the line is only 2 cells long, both of its digits have different entropy. Digits do not repeat along the indicated diagonal. Digits separated by a white dot are consecutive. Digits separated by a black dot are in a ratio of 2:1.