Logic Masters Deutschland e.V.

Rules:

Normal Sudoku rules apply.

Digits in a cage must not repeat and must sum to the number in the top left corner of the cage.

Draw a one-cell-wide loop of orthogonally connected cells. The loop may not touch itself, not even diagonally.

-- The loop must enter at least one cell of each cage.

-- Numbers on the loop count as double their value when calculating cage sums. For example, a 2-cell cage summing to 10 may contain a 2 on the loop and a 6 not on the loop.

-- The loop acts as a German Whispers line (i.e., adjacent digits on the loop must have a difference of at least 5). The original, undoubled value of the digit is always used for the purposes of the German Whispers constraint.