This is a Demo App to showcase some of Server Sent Events(SSE) capabilities - shown at OSDC 2021
It uses chessboard.js for the UI:
https://chessboardjs.com/
And Chess.js for the engine:
https://github.com/jhlywa/chess.js/blob/master/README.md
Both of these are abstracted at the Chess_lib module.
Feel free to look around and to suggest any improvement :)