ReplayChess

About

ReplayChess drops you into the critical position of a famous chess game and lets you play it out against a friend, a matched opponent, or Stockfish in your browser — then shows exactly where you left the grandmaster's line. 50+ legends with playable famous positions, 3,600+ ECO-coded openings, real-time multiplayer with ELO matchmaking and private challenge links, tournaments, post-game analysis with divergence detection, installable PWA. Built by one person, in public. Free to play; Player plan $4.99/month unlocks the full catalogue. Open source under MIT.