A method of playing "serious" chess when it is not the weekend.
Chess game played by Post or by email.
Chess played by post or by electronic transmission.
a system of play which in gaining in popularity because you cannot lose USCF rating points in this sort of competition; a method of play to determine who owns the strongest chess computer.
Correspondence Chess is playing chess by post, by e-mail or on a server (Chess Practice - Chess Terminolog).
Correspondence chess is chess played by various forms of long-distance correspondence, usually through a correspondence chess server, through e-mail or by the postal system; less common methods which have been employed include fax and homing pigeon. It is in contrast to over-the-board (OTB) chess, where the players sit at a chessboard at the same time (or perhaps play at the same time remotely).