February (Killer sudoku)
(Published on 12. November 2025, 20:59 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.
- Killer cages: Digits in a cage do not repeat and must sum to 28.
Here you can solve the puzzle online:
Solution code: Column 7 from top to bottom (9 digits in total)
Comments
on 17. November 2025, 23:49 by darkgently
Seriously clever puzzle, I agree it's closer to 4 stars than 3. But there is reward for effort - after a lot of colouring and finally disambiguating two key digits (after about 90 mins) the finish was very quick.
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Thank you for your comment, darkgently! I am glad that you liked the puzzle.
Kind regards, sujoyku
on 17. November 2025, 19:35 by Barrels
Wonderful puzzle!
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Thank you, Barrels!
Kind regards, sujoyku
on 16. November 2025, 09:50 by sujoyku
Thank you for your comments, @zardoz37, @fractalminding, @vitaminz and @Black_Doom! I am glad that you enjoyed the puzzle.
Considering the difficulty: I also believed it to be a little harder, but testing feedback consistently had it at 3*.
Kind regards, sujoyku
on 15. November 2025, 10:34 by Black_Doom
Lovely geometry. 4 stars for me though
on 14. November 2025, 14:12 by vitaminz
One particular color pair totally knocked my socks off
on 14. November 2025, 10:13 by fractalminding
These 257 minutes were great.
on 14. November 2025, 02:37 by zardoz37
Good lord I found it ridiculously hard to find the logic required to solve this!
on 13. November 2025, 21:14 by Jolly Rogers
Lots of fun, great geometric deductions too. Pleasure to solve, thanks for setting :)
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You are much welcome, Jolly Rogers, thank you for your comment! I am glad you had a fun solve.
Kind regards, sujoyku
on 13. November 2025, 19:50 by sujoyku
Thank you for your kind comments, @tallcat, @brskri, @ketchup_monster and @RedBarchetta! I am glad that you enjoyed this killer puzzle.
Kind regards, sujoyku
on 13. November 2025, 18:32 by RedBarchetta
Another great one! Once I knew what to look for, and when, it flowed quite nicely.
on 13. November 2025, 16:13 by ketchup_monster
Super fun Killer. Love the theme too, fun solve from the break-in right till the end.
on 13. November 2025, 14:12 by brskri
Not easy. At least 28 has more limited options for 4 cells. This was very good, spotting how the smallest things can sharply limit the placement of digits. Great puzzle and enjoyable hour!
on 13. November 2025, 03:43 by tallcat
An outstanding and approachable killer sudoku!
on 12. November 2025, 21:56 by Piatato
Very nice! I really enjoyed this one. :)
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Thank you, Piatato! That is lovely to hear.
Kind regards, sujoyku
