I heard Cracking the Cryptic had a "Chess Sudoku" game so rather than engage with that in any way, I invented my own Chess Sudoku game. Each 3×2 minigrid must contain one of each type of chess piece, and no piece may attack any piece of the same type, ignoring anything that's in the way — so, no two rooks in the same row or column, no two bishops on the same diagonal, etc.
(If anyone at #alt4me has any idea how to supply useful alt text for this kind of thing do please let me know)