> ReplayChess
Play the critical position of a famous chess game vs a friend, a rated opponent or Stockfish
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[ about ]
ReplayChess is a free, open-source chess platform where chess history is something you play rather than watch. Pick one of 50+ legends, from Morphy and Capablanca to Kasparov and Carlsen, choose a famous game and start from its critical position. Play it out against a friend through a private invite link, a rating-matched opponent with live clocks, or Stockfish running as WebAssembly in your browser at four strengths. When the game ends you get a match rate against the original moves, a marker at the first move where you diverged, and a practice mode to retry the position.
An ECO-coded encyclopedia of 3,600+ openings is playable from each resulting position, so club players can drill the middlegames their repertoire actually produces. Tournaments let a group play the same positions and compare results.
Free to play, no ads; a Player plan at $4.99/month unlocks the full legend and opening catalogue. MIT-licensed on GitHub (replay-chess/chess-battle-turbo), built with Next.js 15, React 19, Prisma, Socket.IO and Stockfish WASM; installs as a PWA.