The onion sudoku
(Published on 27. March 2026, 01:31 by Killer Joe)
Hello.
this puzzle turned out to be a bit tricky for some but it has some nice geometry. (not Phistomefel's ring)
If you get stuck, consider the cages from box 5 and how they interact with the other cages.
Testers agree on 2 stars for difficulty but I feel like it's closer to 3. Let's find out...
Normal Sudoku rules apply.
Digits do not repeat within a cage and each cage sums to the same total.
The digit in the grey square is even.
Consider the grid as concentric layers centered on R5C5:
Layer 1: R5C5
Layer 2: the remaining cells of box 5
Layer 3: the ring of cells surrounding box 5
Layer 4: the next outer ring
Layer 5: the outermost ring of the grid
In each layer, all caged cells have the same parity (all odd or all even).
Have fun.
Solution code: Row 9, first 6 digits.
Comments
on 28. March 2026, 13:41 by SennyK
Great construction! :-)
on 28. March 2026, 11:57 by Franjo
Thank you very much for creating and sharing this lovely puzzle.
on 27. March 2026, 18:53 by itsid
surely not more than 2* indeed very approachable.
very beautifully set up btw.. like it alot!
on 27. March 2026, 17:45 by dzamie
Definitely a 2*. Very fun, too! It was nice, being able to smoothly reduce my colors down to just odd and even.
on 27. March 2026, 14:18 by VitP
looks very hard, but careful, judicious goodliffing reveals a surprise
on 27. March 2026, 13:40 by anothermember
Fantastic, lots of surprises. I think I agree with the testers 2* difficulty.
on 27. March 2026, 12:57 by mihel111
Very fun layers to peel. Didn't drop too many tears.
on 27. March 2026, 12:24 by Ragna
Fun puzzle! Thank you. :-)
