“Chessboard”

Chessmsgs.com

Play chess over Twitter, SMS, iMessage, Facebook, Snap, Whatsapp, Google Chat, email, WeChat, Telegram, KaTalk, Viber, and other services that support the sharing of web links.

Created by Greg Wilson

Source code: https://github.com/gregsramblings/chessmsgs

Running on Google Cloud Run

More technical details in this blog post