Interesting read how Greg Wilson built ChessMsgs.com, a website that can track chess games played by sending links to eachother.
Instead of tweeting moves back and forth, players tweet links back and forth, and those links go to a site that renders the current chessboard, allows a new move, and creates a new link to paste back to the opponent. I wanted this to be 100% serverless, meaning that it will scale to zero and have zero maintenance requirements.
The board’s state is represented as a string using the Forsyth–Edwards Notation (FEN)
rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
That same FEN is also fed to service that generate static images of the board for use in the meta tags.