Facebook’s Messenger has hidden chess game

PanARMENIAN.Net - Facebook has a hidden, fully functional, graphical game of chess embedded into its Messenger, Mashable reports.

To start a game, open a Messenger conversation with someone and type "@fbchess play," and a chess board will show up.

Unfortunately, the board is not drag-and-drop; instead, you need to send text commands to move your pieces across the board, with the board refreshing as a new static image after each move. The commands use Standard Algebraic

Notation; in layman's terms, this means that P is pawn, N is knight, B is bishop, R is rook, Q is queen and K is king. To move a pawn from the starting position, for example, you'd type "@fbchess Pb4."

The game supports draws (type "@fbchess draw offer" to offer one), undo (type "@fbchess undo"), and you can resign with "@fbchess resign".

There's quite a bit more to it; to get the full list of commands, type "@fbchess help" into Messenger.