Normal sudoku rules apply. Adjacent digits on a green line differ by 5 or more. Lines continue straight when crossing.
I think there's some fun logic in this construction, I hope you find it as interesting to solve as I did to set, and I'd love to know what you think.
Solution code: Column 3 top to bottom, 9 digits no spaces.
on 12. July 2023, 20:35 by brimmy
quite hard inbetween, well constructed!
on 10. July 2023, 22:51 by nunc
I liked it very much!