Inspired by LKegel's BetSandwichween, do check out that puzzle if you haven't seen it already!
You can play this puzzle online using f-puzzles: https://f-puzzles.com/?id=yhuekyvr.
Enjoy!
Solution code: Rows 4 and 6. I.e. the 9 digits in row 4 from left to right, followed by the 9 digits in row 6 from left to right, for example: 123456789123456789
on 30. April 2024, 21:54 by StephenR
Solving this was a delight, as smooth as something that is very smooth.
on 9. November 2022, 05:59 by wooferzfg
Very clever logic!
on 21. August 2022, 13:06 by Playmaker6174
Lots of juicy and interesting logic packed into this one, enjoyed the solve a lot ;)
on 5. August 2021, 14:40 by uvo_mod
Label "Online Solving Tool" ergänzt.
on 23. April 2021, 13:05 by udukos
That was fun. Thanks, Qodec!
on 21. April 2021, 10:34 by Qodec
Thanks everyone! It's good to be back.
on 20. April 2021, 09:36 by raretypeoffox
Very elegant solve path. Every step of the way is challenging but not overwhelming. Lots of great "ah ha" moments. Congrats on another wonderful puzzle :)
on 19. April 2021, 21:46 by marcmees
nice.
on 18. April 2021, 17:27 by katsudon1cho
Amazing puzzle as always. Thanks for the content!
on 18. April 2021, 17:24 by William Cheese
Enjoyable.
on 17. April 2021, 23:24 by abed hawila
Excellent puzzle! World-class level from you, as usual. Thank you ;)
@abed hawila You're welcome, happy you enjoyed it!
on 17. April 2021, 19:38 by LKegel
Very nice! You can do so many cool things with between lines, and this puzzle is a great example of that.
@LKegel Yeah it feels like this puzzle touched only the surface of it. Tough constraint to work with though!