MeninjoDoRio/Chess ? reverse-engineered prompt

Build me a two player chess game in Python that feels complete and polished.

I want a playable chess app with a nice board, piece images, turn handling, legal move validation, captures, check, checkmate, stalemate, and the usual chess rules like castling, en passant, and pawn promotion. It should be easy to run locally and let two people play on the same computer. Use the assets already in the project if they exist, and make the game look clean and simple.

If anything is unclear from the current files, inspect the code and fill in the missing pieces in a sensible way. Keep it lightweight and make sure the whole game actually runs from the main file without extra setup.