Digits may not repeat on the marked diagonal.
Killer
Digits in a cage do not repeat and sum to the small number in the top left corner of the cage.
Magic Square
Box 1 is a magic square i.e. every row, column and 3-cell diagonal within the box sums to 15.
Link:
SudokuPad
Solution code: column 5
on 17. December 2025, 16:53 by itsid
sheesh... that took me a while;
way too many options for way too many killer cages at first, but then I heard that tiny voice in my head: about "... a secret I only share with my favourite people" and then it finally gave me a few more digits to place;
Very interesting, super satisfying (mostly because I thought it'd break me before I break it and was wrong)
Thanks for setting!
on 24. October 2025, 10:32 by ICHTUES
Super fun!
on 29. September 2025, 23:20 by briansometimes
Think I set a new record for how many times a solver can forget about a magic square while stuck trying to disambiguate.
on 29. September 2025, 21:58 by wilsig
Took quite long, but was extremely satisfying. What a brilliant puzzle!!
on 29. September 2025, 09:30 by Snookerfan
Really fun puzzle! More approachable than expected at first look. Thank you
on 28. September 2025, 23:35 by Wuschel
Very nice, fun solve.
on 28. September 2025, 22:09 by Exigus
Sweet stuff. A little bit of arithmetic works like magic. Thanks!
on 28. September 2025, 15:54 by rameshsrivats
Awesome, as always