Logic Masters Deutschland e.V.

Rules:

• Normal Sudoku rules apply.
• Place doubler-cells into the grid so that there is exactly one doubler-cell in each row, column and box. Each doubler-cell must contain a different digit and the value of a doubler-cell is twice the value of the contained digit.
• Adjacent digits along a green line must differ in value by at least 5.
• Values at equal distance to the center of a lavender line sum to the central value.
• Box borders divide each blue line into segments with the same sum (values).