Rules:
Normal Sudoku rules apply.
Identical digits cannot be a knight's move apart.
A "disjoint groups" rule is in effect; i.e. the same digit cannot appear more than once in the same position inside a box.
Digits along the diagonal indicated by the arrows outside the grid must sum to the given total, and may repeat.
The gray lines are palindromes; digits on each of these lines must read the same forwards and backwards.
Links:
Solution code: Row 2 followed by row 9, left to right (ex. 473985612987534126)
on 26. August 2022, 03:16 by purpl
Replaced penpa link thanks vebby!
on 5. September 2021, 01:27 by uvo_mod
Labels ergänzt.
on 26. June 2021, 23:02 by purpl
Thank you so much alaynacrisp! Always great to see such positive comments :)
on 25. June 2021, 15:29 by alaynacrisp
Beautiful puzzle! Thank you :)
on 17. June 2021, 21:08 by purpl
Small formatting error
on 17. June 2021, 20:51 by purpl
Added links to multiple solving platforms
on 1. June 2021, 03:07 by purpl
Added image
on 29. May 2021, 01:04 by purpl
https://www.youtube.com/watch?v=s1-oOx9xINs
If anyone would like to see Cracking the Cryptic's solution video to this puzzle
on 20. May 2021, 15:31 by purpl
Thank you d3992939 :> you are very kind.
on 19. May 2021, 20:38 by d3992939
Great constraint interaction in what was an enjoyable solve.