Logic Masters Deutschland e.V.

Oh no! Once again, some scoundrel has stolen the lines from my puzzle. There were three lines starting in box 1 and ending in box 9. Once the lines exited box 1 they did not return and once they entered box 9 they did not leave. The lines moved orthogonally from cell to cell without branching, crossing or sharing cells.

Each line was a duality line taking 2 of the following properties without leaving any unused;

Dutch whisper- Adjacent digits on the line differ by 4 or more,
Modular line- Any 3 consecutive cells on the line contain one digit from each of the vertical number pad groups (147) (258) (369),
Ten line- Split the line into non overlapping segments. Each segment sums to 10,
Counting line- A digit on the line indicates the number of times that digit appears on the line,
Different difference line- Adjacent digits on the line must have a unique difference,
Domino line- Split the line into dominoes (non overlapping segments of 2 digits). No domino may sum to a prime number and any 2 dominoes that touch must contain 4 unique digits.

Fortunately they left behind a digit and a couple of Kropki dots that separate consecutive digits. Hopefully the puzzle is still solvable applying normal Sudoku rules.

Puzzle link