Back in the days when dinosaurs wandered the Earth and kids walked to school in 20 feet of snow, 16 miles at a time, there was a thing called mail. No, not e-mail. Actual physical mail. See, people wrote stuff on paper and you could send it to each other.
Some people used this ancient method to play chess. They would send letters detailing their moves, and the opposing player would make the move on an actual board in their home. Weird, huh?
Now, every portion of that method to play chess is obsolete, much like that “mail.” thing. Online at Ajaxplay, it’s even free with no stamps needed. Once you’re registered, you’re free to play as many games are you want at once.