A Break-In the Middle
Standard Sudoku rules apply
Standard Killer Sudoku Rules apply
Digits in caged areas add up to the number in the upper left corner. And digits can not repeat in cages.
Here is a link to the puzzle on f-puzzles
Solution code: Row 8 + Column 8
on 14. August 2021, 10:11 by Hausigel_mod
Added label for Online solving tool
on 5. August 2021, 13:29 by Tilberg
Cool, multi-level break-in, then one really hard deduction, and after that it's a breeze ...