Chess
Players are not allowed to smoke in the playing area. They are only allowed to smoke in areas designated by the organiser. Mobile phones may not be used or even switched on. In many tournaments players may not bring mobile phones into the playing area. Players cannot use any source of advice during a game, such as other players or chess books, nor analyse the game on a device. These and other matters are covered by the FIDE Laws on the conduct of the players.Article 12