An experimental ruleset that I found to be quite interesting to set with. Basically, you can think of each line as being a standard arrow clue, but the position of its circle cell (which equals the sum of the other digits) is not specified, and can be anywhere on the line, not just at an end.
Rules
Solution code: Rows 8 and 9.
on 27. May 2023, 19:21 by OldCaptainWZJ
I like sudokus with just a single extra rule, and this puzzle is one of the most brilliant of them. The deductions are novel, and they are all interesting and rewarding to find. Thanks for setting this!
on 15. January 2023, 17:19 by Samish
Great execution of this cool idea!
on 19. October 2022, 22:15 by Vebby
Brilliant puzzle! Definitely a sleeper classic, deserves way more solves.
on 26. May 2022, 18:22 by Jay Dyer
Added some additional description of the nature of the clues.
on 26. May 2022, 16:43 by DVFrank
Absolutely incredible puzzle! There were so many deductions that were really fascinating - in particular deducing the composition of the lines in box 7 was such a treat! :^) Thank you for setting this!
on 26. May 2022, 15:00 by JayForty
My mind is blown by this puzzle. At first glance it's just ridiculous and you expect some hidden trick or secret to it. Absolutely amazing and clever setting.