ReplayChess

I kept pausing Agadmator videos to find the winning move, finding it, and then nothing. In a real game finding the move is half the job; you still have to convert. So I built ReplayChess: jump into a famous game at its critical position and play it out against a real opponent or Stockfish, then see where your moves left the legend's line. What it does: 50+ chess legends (Morphy, Fischer, Kasparov, Carlsen and more) with famous games whose decisive positions are ready to play; 3,600+ ECO-coded openings playable from the resulting position; rating-based matchmaking with time controls, private challenge links that work without an account, and tournaments; Stockfish running as WebAssembly in the browser at four strengths; and a divergence report after each legend game showing your match rate and the first move where you diverged. Who it's for: club and online players in the 800-2000 range who follow chess history channels, and coaches who want to hand a student a specific position. Why now: chess history content is huge on YouTube, but none of it lets you play the position. Free to play with no ads; a Player plan at $4.99/month unlocks the full catalogue. Open source under MIT, built solo from Mumbai with Next.js 15, React 19, Socket.IO and Stockfish WASM.