Double Dragon (ft. Piatato)
(Published on 3. December 2022, 08:00 by Nordy)
This puzzle was created in consultation with Piatato. Although Piatato never technically reached "full collaborator" status (according to him), he tested and provided feedback at every stage.
This puzzle should be quite approachable as long as you are careful with arithmetic—it can be easy to overlook some sneaky options. Enjoy!
Rules:
Normal Sudoku: Place the digits 1 to 9 in every row, column, and 3x3 box.
Double Dragon:
- Draw a single, orthogonally-connected, 1-cell wide snake that does not branch, loop, or touch itself orthogonally (but may touch itself diagonally).
- The two ends of the snake must be determined.
- Digits along the snake count for double their value.
Arrows: Values of cells along an arrow sum to the value in the corresponding circle.
Example: Below is a 6x6 example puzzle that you can solve online (Penpa+, CTC).
Solve Online:
Solution code: The digits in Column 9 from top to bottom followed by the number of snake cells in Column 9 (ten digits, no spaces)
Comments
on 14. July 2023, 04:44 by damasosos92
I was really afraid of all those arrows and doublers and math, but in the end it was a lovely ride. Not so difficult, but it was SO easy to make mistakes! Loved it!
on 11. January 2023, 18:58 by KNT
Really nice puzzle.. and a devious end. Solvers really need to keep track of ALL possibilities throughout the solve.
on 22. December 2022, 20:27 by filuta
Amazing puzzle, can't imagine for it to be improved by any arrow Piatato could've added to it :o))
on 8. December 2022, 12:21 by MagnusJosefsson
Great puzzle, very enjoyable!
on 5. December 2022, 20:07 by bansalsaab
Beautiful construction. Nice progression with one clue leading to other and so on.
on 5. December 2022, 11:32 by Christounet
Loved the beginning of the puzzle and the very end that was quite sneaky indeed ! A new idea around doublers that brought much pleasure to the solve. Thanks.
on 5. December 2022, 03:15 by Elliott810
Brilliant puzzle! And a ruleset with much potential. Thanks:)
on 4. December 2022, 21:40 by Piatato
Awesome puzzle! It was a real joy testing and toying with this puzzle. I almost even came up with an actual arrow to put into it, but the logic that I hoped it would bring just didn't exist, haha. In particular it's quite fabulous how such a busy looking grid can solve in such a neat manner. :-)
on 4. December 2022, 15:00 by ademjaz
Very nice puzzle! Thanks :)
