Facebook's Messenger app is one of the most popular apps on any mobile platform for messaging just about anyone, and while it's primary function is to chat with your Facebook contacts, it's possible to use the app for more than that, like voice calls and video calls, sending money between users, and according to a user on Reddit, playing a game of Chess. It might sound like an odd thing, but Facebook's Messenger app does indeed seem to be capable of letting to friends engage in a battle of the minds to see who can come out the victor in this game of strategy.
To initiate this friendly (or simply competitive) game of Chess all one needs to do is open up a chat with the person they want to play with, and use the mention @fbchess play, and the conversation will pop up a chess board stating that you've begun the game as the white pieces and that it's your turn to move a white piece before your opponent can have their turn. From there, it's as simple as typing in the moves you want to make until the game is finished. Each time a user types in their move, a new image will appear in the chat stream with the pieces that have been placed in a new location.
It can be a somewhat slow, albeit fun way to engage in a game of Chess, if that's your thing, as you may want to play a game at any moment but might not have a board on hand or you may simply not be with the person you want to play with when the mood strikes. Whatever the reasons, Messenger can serve as your Chess board whenever you like. The chess command within Messenger is one of two currently, while the other one is a command listed as @dailycute, which when typed, calls back a random cute image of something that is both cute and perhaps a little bit funny. These are currently the only commands Facebook's Messenger app offers, although in the past Messenger has had at least one other according to a post on the Reddit thread.