Logic Masters Deutschland e.V.

Rules:

Normal sudoku rules apply.

Every set of three sequential cells on a teal modular line must contain one digit from (1,4,7), one digit from (2,5,8), and one digits from (3,6,9).

Along purple zipper lines, pairs of digits equidistant from the center of the line have the same sum. On odd-length zipper lines, this sum is the value of the digit in the central position.

Solve in Sudokupad