Crazy 15
(Published on 7. August 2025, 15:40 by r_zimmer)
The Sum along each line and in each cage is 15. Normal Killer Sudoku rules apply: numbers do not repeat in a cage.
Numbers also do not repeat along a line.
Also available asCTC-link
Solution code: Numbers along the diagonal through boxes 1, 5, 9 (top left to bottom right)
Comments
on 9. August 2025, 07:10 by r_zimmer
Same wrong assumption. Added another cage.
on 8. August 2025, 20:33 by r_zimmer
Additional line and cage. Updated link.
Comments were right, I have made an assumption while solving which was not correct.
on 8. August 2025, 14:40 by lianarox
There are definitely multiple solutions without the anti-diagnal constraint.
on 8. August 2025, 10:16 by Starlight
I also was unable to find a unique solution until I saw the talk about the diagonals. I have double checked and there are definitely multiple solutions without some other constraint not mentioned
on 8. August 2025, 09:48 by r_zimmer
Link with solution posted.
Comment: The diagonal constraint is not necessary if you look at high (6789) and low numbers. The top three boxes also contain a clue. The solution to R1C1 is also unique.
on 7. August 2025, 23:06 by Marshal on Mars
After getting stuck I saw SKORP's comment that there is supposed to be an anti-diagonals (main positive & negative) constraint, and with that information, this became solvable.
Without that rule, it lacks a unique solution.
on 7. August 2025, 17:19 by SKORP17
es fehlt die Bedingung, dass die beiden Hauptdiagonalen keine doppelten Ziffern enthalten dürfen
