Create a game to get a 5-digit key, share it with your opponent, and play live across the void. Either player can stop the game at any time.
Generate a key and send it to your opponent. You play White.
Enter the 5-digit key your opponent shared. You play Black.
Online play connects the two browsers directly (peer-to-peer) using a public signalling broker — no account, no server of your own. If a connection can't be made, use pass & play.