Logic Masters Deutschland e.V.

It is time to combine the sudoku variants into a single puzzle.

Normal sudoku rules apply.

Diagonal (Positive and Negative): Digits cannot repeat in marked diagonals.

Zipper (R1C1 to R5C5 and R2C1 to R6C1): Along a lavender line pairs of digits that are the same distance from the middle cell must have the same sum. If a digit is in the center cell, that digit's value is the sum for all pairs.

Dutch Whisper (R5C5 to R1C9 and R1C4 to R1C8): Adjacent digits on the orange line must be differ by at least 4.

Region Sum Lines (R9C1 to R5C5 and R9C2 to R9C6): Along a blue line the sum of the digits must be the same within each box.

German Whisper (R5C5 to R9C9 and R4C9 to R8C9): Adjacent digits on the green line must be differ by at least 5.

Renban (R6C1 to R7C2 and R3C8 to R4C9): Digits on the pink line must be consecutive and unique in any order.

Palindrome (R1C4 to R2C3 and R8C7 to R9C6): The digits on a gray line must be the same when read from either direction.

CTC Link

Puzzle:

Fun fact: The puzzle can still be solved uniquely by keeping just one of the four short, two-cell lines, with one exception. The top palindrome clue alone leads to multiple solutions, while keeping any of the other three lines will result in a unique solution.