Normal sudoku rules apply.
Digits in circles and squares indicate how many circles and squares contain that digit, respectively.
Additionally, when inside of a killer cage, digits in circles indicate how many odd factors the sum of the cage has and digits in squares indicate how many even factors the sum of the cage has.
For example, if a cage had a circled '2' inside of it, the sum of the cage would have exactly two odd factors.
Killer cages must not repeat digits and sum to the number in the top left of the cage, if given.
Every cage in this puzzle has a different sum.
Solution code: Enter Column 9
on 26. July 2024, 18:28 by sanabas
Enjoyed this a lot
on 25. July 2024, 16:01 by sujoyku
Thank you for this fantastic arithmetic puzzle, chrisjnap! Although I am embarrassed to admit I forgot about one crucial rule the whole time, it was a splendid solve. I loved how the counting circles and the factor counting worked. Mathy and classy! Gorgeous setting!
on 16. July 2024, 15:34 by RockyRoer
Interesting rule. I forgot that no cages can equal the same thing, which is important.
I found myself wishing there was a place to take notes, so here's a link to a version with the ability to record some scratch work off to the side: https://sudokupad.app/yiqbh2ap8h