How running chess engines in the browser eliminates the one-game-a-day analysis limit

Most chess platforms cap free game analysis at one game per day, a limit driven by real server costs rather than pure monetisation strategy. Analysing a single 40-move game requires evaluating roughly 80 positions, consuming nearly three minutes of CPU time per user, which adds up to around 50 CPU hours daily at just 1,000 users. Because each game is unique, none of this computation can be cached, making the free tier genuinely expensive to operate at scale. A technical alternative exists: Stockfish, the open-source chess engine, can be compiled to WebAssembly and run directly inside the user's browser via a Web Worker, shifting all processing costs to the visitor's own device. This approach means the server only needs to deliver static files, eliminating per-user compute costs entirely and removing any practical reason to impose a daily analysis cap.