Logic Masters Deutschland e.V.

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Normal sudoku rules apply.

Each line is a combination of exactly two of the following line types (it has the characteristics of both), which must be determined by the solver:

- Renban line: Digits on a renban line form a of set non-repeating consecutive digits in any order.
- Region sum line: Digits on a region sum line have an equal sum N within each box it passes through. If a line passes through the same box more than once, each individual segment of such a line within that box sums to N separately.
- German whispers line: Digits on a German whispers line differ from their neighbors on the line by at least 5.
- Palindrome line: Digits on a palindrome line read the same from both directions.
- Zipper line: Digits that are an equal distance from the center of a zipper line sum to the digit in the center.

Each line has a unique combination of line types, and each line type must be used twice.