Logic Masters Deutschland e.V.

Rules:
⚪ Step 1 (Satogaeri): Move the circles on a straight line, vertically or horizontally, so that each box contains only one circle. The numbers in the circles indicate how many cells they have to pass through. The circles cannot cross the tracks of other circles and cannot go over other circles. Draw all tracks and landing positions of the circles (e. g. with the pen tool). For clarification: The numbers remain at the starting circle.
⚪ Step 2 (Sudoku): Normal Sudoku rules apply. Treat each track of step 1 as a Double Arrow, where the sum of the two circles equals the sum of the digits on the line. Purple lines contain sets of distinct consecutive digits in any order.

Link: Sudoku-Pad