Puzzle #553 - Smile (Sudoku)

A while back pzprrt added support for a lot more genres, including Sudoku. I spent a bit of time toying with it to see how it felt and turned up what is apparently a reasonably nice vanilla sudoku puzzle. I wouldn't know myself, I'm terrible at assessing these, though tracing why something was forced was certainly useful for making the puzzle work more nicely, without having to overclue like in the past.

puzz.link interface