Logic Masters Deutschland e.V.

Normal sudoku rules apply.

Renban: Any purple line or loop contains a set of non-repeating consecutive digits in any order.

German whispers: Adjacent digits along any green line or loop differ by at least 5.

Modified XV with negative constraint: Of the four different pairs of distinct digits that can sum to 10, three are always separated by an X when orthogonally adjacent; the fourth is never separated by an X. Similarly, of the two different pairs of distinct digits that can sum to 5, one is always separated by a V when orthogonally adjacent; the other is never separated by a V.

Play this puzzle in SudokuPad or f-puzzles.

This is a modification of a puzzle originally submitted to zetamath's stream celebrating 1000 subscribers.

A sample 4x4 puzzle with the same ruleset and its solution appear below.