Correspondence chess is chess played at a distance, one move at a time. In 1824 the London Chess Club challenged the Edinburgh Chess Club to a match by post. Each move travelled some 400 miles by mail coach, and the match ran from April 1824 to July 1828.
The underdogs won. Edinburgh took two games to London's one, with two draws. In one game London asked to take back a move; Edinburgh declined and went on to win it. The match also gave an opening its name: the Scotch Game, still played today.
Plymico keeps that rhythm, without the mail coach. A move today. A reply tomorrow. A rivalry for years.