Add fields to state in chess

[janetwise]

Hello, I need to add more variables to the State object for the chess game, for example, number of pieces remaining at each action step. I updated the chess.py under pgx/pgx. Do I need to reinstall pgx: pip install pgx to make the update? Is there an easier way to do it?

[sotetsuk]

You can install your version of pgx by pip. Thanks!