Logic Masters Deutschland e.V.

This puzzle is a bit similar to the Continuous Sums sudoku which I published last year, but this time the sums have to double along the lines.

Rules:

• Normal sudoku rules apply.
• Box borders divide the blue lines into segments. Digits within each segment must sum to values which increase in 2:1 ratio along the line. Every visit to a region counts to a new total.

For example, 4-125-79 is a valid sequence of digits along a doubling sum line, because the sums of digits in the segments are 4, 8 and 16:

Note: The starting and ending sum and the direction in which the sums increase must be determined by the solver. They can be different for each line.

Play online on SudokuPad