Logic Masters Deutschland e.V.

Rules
Place the digits 1 to 9 once each into each box. Digits may not repeat in the same row, column, or box of the grid.
Box borders divide the blue line into segments with the same sum.
Additionally, the perimeter of this region sum line (marked by a thin yellow line) is a modular line: any three adjacent digits along this line have different residues modulo 3 (i.e. one digit from {1,4,7}, one from {2,5,8}, and one from {3,6,9}).
Along the orange line, adjacent digits differ by at least 4.
Along the pink line, digits form a consecutive sequence in any order.
Digits along the red parity line must alternate between odd and even.

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