Finally a parity approach to ATKs shading ruleset as contribution to the series. The difficulty is kinda hard to estimate, it really depends how familiar you are with this kind of ruleset. I would guess the difficulty to be around 3* to 4*. To make it more beginner friendly, I have added also a much easier version (2*). Have fun!
Normal Sudoku rules apply.
Parity shading: A cell is shaded if its digit is exactly 2 higher than that of an orthogonally or diagonally adjacent neighbour within the same box. All shaded cells are given.
Anti-knight: Digits a knights move away in chess cannot contain the same digit.
Renban: Digits on a purple line form a set of consecutive numbers in any order.