Choose Your Fighter (Between Lines or Double Arrows)
(Published on 18. February 2026, 23:57 by damo_89)
A setting challenge for myself, this puzzle can be solved with the lines either acting as between lines or double arrows (the solution is different for both puzzles). I have ideas for a 9x9 but looking to gauge interest in such an idea. Good luck!
- Normal 6x6 sudoku rules apply: Place the digits 1 to 6 once each in every row, column, and 3x2 box
- Then, either:
- Between Lines: Digits along a grey line must be strictly between the digits in the two connected circles; or
- Double Arrows: Digits along a grey line sum to the same as the sum of the digits in the two connected circles
Play Between Lines version on Sudokupad
Play Double Arrow version on Sudokupad
Solution code: Row 6 of Between Lines puzzles followed by Row 6 of Double Arrows puzzle (12 digits)
Comments
on 15. March 2026, 23:09 by ch3ka
Very interesting geometry. Fun solves.
on 5. March 2026, 20:25 by damo_89
Clarified length of solution code
on 4. March 2026, 18:54 by oekshum
WOW! never thought of a pair of puzzles like this. such a nice idea and great execution.
on 3. March 2026, 16:50 by zimmicks
Says I completed the puzzle, yet inputting the solution code gives an incorrect response.
See hidden comment for details
on 21. February 2026, 00:46 by thoughtbyte
Very cool and fun. Thanks!
on 20. February 2026, 22:36 by CcmarvMD
Absolutely ridiculous how good this was, both puzzles are already exceptionally beautiful and the fact it functions both ways is just wonderful! Amazing puzzle!
on 20. February 2026, 19:34 by dzamie
Oh, that's neat! Double arrows was a little more interesting for me, since I had to keep cycling around the loop to gradually eliminate options, whereas between lines had a neat break-in and then fell into place immediately afterwards.
on 20. February 2026, 15:28 by michael_787
The between lines version was super easy, took me less than 2 minutes. The other was slightly trickier. I enjoyed both.
on 19. February 2026, 20:40 by boggles
neat! what a cool idea and tidy execution :D
on 19. February 2026, 13:12 by rojspencer
Fun solving the same puzzle twice with two different solutions.
on 19. February 2026, 08:26 by Wuschel
Very nice, thanks!
on 19. February 2026, 03:57 by tallcat
Nice and smooth. A 9 x 9 along these lines would certainly be of interest!
on 19. February 2026, 03:01 by ScatterBrain
Nice how this works both ways!
on 19. February 2026, 01:31 by gdc
Very smooth. I liked how the solve paths felt quite different between the puzzles.
