Rules:
Place the digits 1-9 once each into every row, column, and box.
Adjacent digits along the green line differ by at least 5.
The main diagonals both sum to prime numbers.
Have fun solving!
Solution code: The positive diagonal from top-right to bottom-left
today, 15:50 by iEtsh
NO
today, 12:44 by Snookerfan
Gorgeous puzzle! The coloring combined with the german whispers was crazy difficult and after I finally succeeded for the most part, I was so happy that I could make the diagonals add up to a prime number, which was a nice way to finish the coloring. Thanks