This is partly an anti-anti-knight puzzle.
Each given digit is the start or end of a path of chess knight's moves. It contains five or six digits, which are all the same as the given digit at the start/end. There are only seven such paths. See example with such a path for ones.
The sum of digits in cages is the same for all cages.
Normal Sudoku rules apply.
Try it at F-Puzzles.
Solution code: Digits from first row.
on 14. February 2021, 22:01 by Ryx
Tricky puzzle, for me. Thanks, I love a good challenge, when I can eventually solve it.
on 13. February 2021, 20:33 by TonyN
Thank-you, I enjoyed this!