The puzzle is a bit late, but I had to remake part of it as part of the logic was incorrect. Hopefully this one is without error.
Recap of the last Daily League week:
Sunday: One of Eight Sudoku by Seungjae Kwak
Monday: Pairs Sudoku by Jakub Hrazdira
Tuesday: Domino Sudoku by Prasanna Seshadri
Wednesday: Frame Sudoku by Bastien Vial-Jaime
Thursday: Odd-Even Antiknight Sudoku by Rishi Puri
Friday: Nonconsecutive Sudoku by Tom Collyer
Daily League PDF's:
Rules for Sudoku
In this Sudoku, a number between two cells indicate either the sum of or the difference between these two cells.
[Edit: Puzzle image adjusted as one of the clues was missing]