user14797: Lichess analysis board uses my own cpu so I am just curious if chess.com also uses my own cpu.I have tried searching but I can't find any information about it.

user12523: Yes, it does. It uses stockfish.js, the Javascript port of Stockfish, which can run on web browsers. You can see stockfish.js mentioned somewhere on the chess.com analysis board. Also, I can tell that the computer fan starts working harder when I run an analysis, and looking at the "top" command shows that the web browser is using 100% CPU.

user825: Yes and no. Local board analysis definitely use your own CPUs, running the Javascript version of Stockfish. However, the deeper server analysis uses their own computing clusters.
Same with Lichess.

14797: <p>Lichess analysis board uses my own cpu so I am just curious if chess.com also uses my own cpu.I have tried searching but I can't find any information about it.</p>
 12523: <p>Yes, it does. It uses stockfish.js, the Javascript port of Stockfish, which can run on web browsers. You can see stockfish.js mentioned somewhere on the chess.com analysis board. Also, I can tell that the computer fan starts working harder when I run an analysis, and looking at the "top" command shows that the web browser is using 100% CPU.</p>
 825: <p>Yes and no. Local board analysis definitely use your own CPUs, running the Javascript version of Stockfish. However, the deeper server analysis uses their own computing clusters.</p>

<p>Same with Lichess.</p>
