Set Equivalence Theory (SET) - Sudoku technique simplified

i havent seen a video or post that explains SET to people who've never come across it before so this is a quick impromptu guide to the technique. i hope i covered everything thats needed to know about it, and that its clear enough to understand. if something doesnt make sense leave a comment and i will try my best to explain, thanks!

Видео Set Equivalence Theory (SET) - Sudoku technique simplified канала shye