The rules for this puzzle come from RockyRoer (see also 0004KP and 0004M3).
Normal sudoku rules apply. Digits cannot repeat within cages and sum to a hidden cage total (located in the leftmost cell in the top row of each cage). Every cage total must be divisible by the first and last numbers in the row and column that contain that cage total. For example, if the cage total in R1C7 is 21, then R1C1, R1C7, R1C9, and R9C7 can only contain the digits 1, 3, or 7.
Play in Penpa+ (cage totals are marked with ?)
Play in f-puzzles (cage totals are colored blue)
Solution code: Row 2, Column 5
on 21. February 2021, 13:11 by bigger
Still can't believe that I actually solved it. Very nice. Especially that three row
on 20. February 2021, 13:14 by RockyRoer
Hmm... I might have to come back to this... I remember starting it while you were creating it a few weeks ago... looks like fun
on 20. February 2021, 12:17 by Gliperal
Added sudoku tag.