Normal sudoku rules apply.
XV rules - Cells connected by an X sum to 10. Cells connected by a V sum to 5. Not all possible Xs and Vs are shown.
German Whisper rules - Adjacent digits along the grey line must differ by at least 5.
This puzzle can be found on f-puzzles.
If you're having trouble getting started, there's a hint in the link below the puzzle (spoilers!).
Solution code: Row 5 then column 5, 18 digits, no punctuation.
on 14. March 2023, 12:00 by Montikulum
Not an easy puzzle in my opinion (so 2 stars is not enough), but it was a lot of fun figuring out how to crack it.
on 12. March 2023, 14:34 by Ragna
Very nice and phistytricky. Thank you for sharing. :-)