The Facebook Messenger app, in all its ubitiquity, has a secret.
The app has one of the oldest games in the world: chess.
To start the game, one has to type “@fbchess play”---which will show a chess board. The sender of the message is granted the first move. Commands are made by typing in specific commands for the pieces. After a move is made, the board is updated and will appear below.
Facebook/screenshot
