Play chess against the Stockfish engine right in your browser. Choose from 8 difficulty levels ranging from Beginner (~400 Elo) to Maximum (~3500 Elo). No downloads, no accounts required — everything runs locally on your device.
Stockfish is an open-source chess engine consistently rated as one of the strongest in the world, with an estimated Elo rating above 3500 at maximum strength.
If you're new to chess, start with Beginner or Casual. Club players should try Intermediate or Advanced. Expert and above provides a serious challenge even for strong players.
No. Everything runs in your browser using WebAssembly. No data is sent to any server. Your preferences are saved in localStorage only.