The 'holes' inside certain letters and numbers are called "Counters". The numbers 4, 6, 9, 0 each have 1 counter, and 8 has 2 counters.
This sudoku is all about counters. Normal killer sudoku rules apply, with a few important additional rules:
Oh, and one more thing, you'll need to figure out where all the cage sums belong. At least you know what they are.
Solution code: Type in row 5 from left to right, and column 7 from top to bottom, no spaces or symbols in between.
on 25. March 2023, 16:05 by Vebby
Penpa+ link with answer check:
https://tinyurl.com/2rxwljxv
on 19. June 2020, 17:35 by Krokant
Funny and enjoyable variant.
What I learned while doing this: Counting counters is harder than it should be. ;-)
on 19. June 2020, 17:23 by RockyRoer
Nutz... had the wrong column in the solution code. I'm SO sorry if you tried this and found it wrong! Should be fixed now!
on 18. June 2020, 21:02 by RockyRoer
What I learned most about myself doing this: I don't actually draw my 4's with counters :-)
Please note: The German version of this page has changed. It is possible that this page does not contain the latest information.