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:
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:
Lösungscode: The digits in Column 9 from top to bottom followed by the number of snake cells in Column 9 (ten digits, no spaces)
am 14. Juli 2023, 04:44 Uhr von 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!
am 11. Januar 2023, 18:58 Uhr von KNT
Really nice puzzle.. and a devious end. Solvers really need to keep track of ALL possibilities throughout the solve.
am 22. Dezember 2022, 20:27 Uhr von filuta
Amazing puzzle, can't imagine for it to be improved by any arrow Piatato could've added to it :o))
am 8. Dezember 2022, 12:21 Uhr von MagnusJosefsson
Great puzzle, very enjoyable!
am 5. Dezember 2022, 20:07 Uhr von bansalsaab
Beautiful construction. Nice progression with one clue leading to other and so on.
am 5. Dezember 2022, 11:32 Uhr von 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.
am 5. Dezember 2022, 03:15 Uhr von Elliott810
Brilliant puzzle! And a ruleset with much potential. Thanks:)
am 4. Dezember 2022, 21:40 Uhr von 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. :-)
am 4. Dezember 2022, 15:00 Uhr von ademjaz
Very nice puzzle! Thanks :)