This puzzle got an error reported at the first contradiction (with tuples, pointing, and contradictions enabled; not sure if AICs will bypass it)
Setting r9c3 to 9 causes a contradiction:
Killer Cage 24 at r8c2 reported the board was invalid without specifying why. This is a bug: please report it!
Naked Single: r8c3=7
Naked Single: r3c3=8
Naked Single: r9c1=8
Hidden Single in Column 2: r7c2=2
Region 7 has nowhere to place 5.
if you give it the 9 as a given, it prints this:
[Killer Cage 24 at r8c2] Sum re-evaluated: -2r89c2;-5r8c2,r9c12;-7r8c2;-8r8c23,r9c2
(without 9, the two options are 3678 and 4578, but there's no 4 in the cage so it's 3678)
This puzzle got an error reported at the first contradiction (with tuples, pointing, and contradictions enabled; not sure if AICs will bypass it)
if you give it the 9 as a given, it prints this:
(without 9, the two options are 3678 and 4578, but there's no 4 in the cage so it's 3678)