hsudoku

0. Install ghcup and use it to get the other tools you need; in particular, stack (but you'll need ghc and cabal too)

1. Build and test with stack build --test. Add --file-watch to automatically rebuild when you change something.

2. Run on a specific puzzle with stack exec hsudoku-exe <puzzle-string>, where the string is the digits of the puzzle from top down, left to right, with 0 denoting empty cells. You can specify more than one puzzle if you want.