Same digits can't be on the same diagonal unless there is a bigger digit between them.
All of the diagonals that are of length at least 4 and have all different digits are marked in blue (if the diagonal of length at least 4 is not marked, then the digits are repeating).
The puzzle is also available via Penpa Plus
Lösungscode: row 3 and row 7, no spaces; total of 18 characters
am 6. Juni 2024, 04:02 Uhr von ascension
Clever puzzle and enjoyable solve
am 21. Mai 2024, 12:43 Uhr von marcmees
very nice. thanks