Logic Masters Deutschland e.V.

Rules:

➡ Normal sudoku rules apply
➡ There are some lines in the grid. Each line must be unrolled to be a straight line in one of the two directions from the ends of the line. Also, any digit on the 'rolled' line must appear in the same relative position on the straight line. All unrolled lines are diagonal in this puzzle
➡ All lines have the same 4-cell 'X' shape. Which direction to unroll the lines must be determined by the solver. Lines cannot be unrolled in a direction that would extend out of the grid.
➡ Digits separated by a black dot must be in a 1:2 ratio.
➡ Digits separated by a white dot must be consecutive.
➡ Not all possible dots are necessarily given.
➡ Also, the grid is partially covered in fog. Placing correct digits will reveal more of the grid. Guessing is not permitted.

An example image of an unfolded line is provided further down.

Play on SudokuPad
In the below example, one of the two possible ways to unfold a line is shown, where the two purple cells contain the same digit, and the two blue cells contain the same digit.