Move validation to ensure only legal moves are allowed. Highlighting for valid moves when a piece is selected. The initial code was a great starting point, but I wanted to enhance it. I prompted ...

A chess library for Python, with move generation and validation, PGN parsing and writing, Polyglot opening book reading, Gaviota tablebase probing, Syzygy tablebase probing, and UCI/XBoard engine ...

And the Raspberry Turk — a chess-playing robot from developer Joey Meyer — is a masterwork in that regard, serving as a way to learn everything from machine vision to robotics to AI.