This puzzle is a natural follow-up to Above Average On Average.
I think I am done with this series and I truly think the following puzzle captures the essence of what I was trying to achieve - to make the solver go:
"I have no idea how/why it solves but it just solves."
The difficulty should be more like 3.5/5. Hope you enjoy :)
Rules:
Normal Sudoku rules apply.
Digits must not repeat within a cage and must sum to the number in its top-left corner.
A clue outside the grid gives the sum of digits along the indicated diagonal.
Box borders divide a blue line into segments with an equal sum.
Try it on Sudokupad.
Puzzle:
Solution code: Row 6 (left to right) and column 2 (top to bottom); 18 digits, no spaces.