Helix
(Published on 13. October 2025, 13:47 by Gerhard1963)
Helix
If you squint your eyes, it kinda looks like a DNA-Helix from afar.
Rules:
- Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box.
- Parity line: Digits along a parity line alternate odd/even.
- Little Killers: Clues outside the grid are the sum of the digits along the indicated diagonal. Digits may repeat if allowed by other rules.
- Kropki pairs: Digits in cells separated by a black dot are in a 2:1 ratio. Digits in cells separated by a white dot are consecutive. Not all dots are necessarily given.
SudokuPad
My Puzzle Catalogue

Solution code: The digits on the positive diagonal (from bottom left to top right).
Solved by vollbesonderbar, milxqueen, Myfyr MJ, elephantwoman, jalebc, biorycbyd, sujoyku, zhangjinyang, Ragna, PinkNickels, BULL-TT, salientropy, kubas51, Postnormal, SKORP17, DanishDynamite, Fisherman, ... drmegadude, paranoid, Snerson, PuzzlePatzer, galium_odoratum, SweJo, tgstar, meiwanmeiliao, SFP, scushuaishuai, jchan18, AlexRaetselt, zrbakhtiar, OBu42, Selsted, timww572, noodlehead
Comments
on 14. October 2025, 08:13 by elephantwoman
this was so fun! and i do see the dna
on 14. October 2025, 02:27 by fuxia
Nice puzzle. Just one note: The copy button in SudokuPad takes digits from top to bottom – exactly in the opposite direction you are asking for, which is probably not what you intended. So if you really really need a diagonal as solution code (I don't get why tbh), then at least don't make it so fiddly.
on 13. October 2025, 19:48 by wuc
Very well crafted 2* puzzle thx.
on 13. October 2025, 15:52 by Ragna
Fun puzzle! Thank you. :-)
on 13. October 2025, 15:11 by sujoyku
Very nice puzzle! Thank you, Gerhard1963!
on 13. October 2025, 15:00 by elephantwoman
this was so fun! and i do see the dna
on 13. October 2025, 14:57 by Myfyr MJ
Very nice puzzle with a lovely break in.