Sudoku: Normal Sudoku rules apply.
Killer: Digits do not repeat in cages, and sum to the digit in the top left corner.
XV: Digits separated by an X sum to 10. Digits separated by a V sum to 5.
When 2 cages are orthogonally adjacent no digits are shared between the 2 cages, and the sums of these cages differ by exactly 2.
Solution code: Column 5