Take a Zip
(Published on 17. August 2025, 10:00 by sujoyku)
Rules:
- Normal sudoku rules apply, i.e. each row, column, and 3x3 region has to contain the digits from 1 to 9 once each.
- Zippers: On a lavender line, digits at the same distance to the center (marked by a dot) must add to the same sum. If the line has odd length, that sum must equal the digit at the line's center.
- Killer cages: Digits in a cage must sum to the clue in the top left.
Here you can solve the puzzle online:
Solution code: Column 5 from top to bottom (9 digits in total)
Comments
on 15. August 2026, 18:24 by jonbeton
Solved with my 9 yo daughter, I let her do the calculations.
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Nice, jonbeton! I hope you two were having a fun solve.
Kind regards, sujoyku
on 5. April 2026, 22:19 by ViKingPrime
"...your outie likes zipper puzzles; and using math to solve puzzles..."
on 12. November 2025, 00:50 by Lenivaya_Joppa
Thank you for this nice puzzle, dear sujoyku! :)
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Thank you for your comment, Lenivaya_Joppa! I am glad you enjoyed it.
Kind regards, sujoyku
on 18. August 2025, 06:25 by MSDOS
Such an elegant back and forth in the corner boxes, loved the interactions you set there! Wonderful puzzle, thanks!
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You are much welcome, MSDOS, thank you for your comment! It is great to hear you enjoyed those interactions.
Kind regards, sujoyku
on 17. August 2025, 19:38 by Kiwo
Really beautifull puzzle! Had fun solving this!
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Thank you, Kiwo! I am glad you had a fun solve.
Kind regards, sujoyku
on 17. August 2025, 18:55 by sujoyku
Thank you for all your kind comments, @Piatato, @RockyRoer, @NCtide, @GeorgeTheToad2, @Adrian71 and @PinkNickels! I am glad that you enjoyed the puzzle.
Kind regards, sujoyku
on 17. August 2025, 17:39 by PinkNickels
The zipper/cage interactions within a single box created some very unique steps. Very creative and nicely executed. Bravo
on 17. August 2025, 15:27 by Adrian71
Approachable and very enjoyable, thanks for sharing!
on 17. August 2025, 15:03 by GeorgeTheToad2
Loved the interaction between the zippers and cages. Then the long zipper and nine cage wrapped it up nicely into a fun mathy solve.
on 17. August 2025, 14:28 by NCtide
Really enjoyed this, thanks!
on 17. August 2025, 13:42 by RockyRoer
Couple of nice arithmetic tricks in this - fun!
Thanks for setting and sharing it with us!
on 17. August 2025, 10:13 by Piatato
Fun one, thanks!
