Chess Cheat Detector is a web-based tool that analyzes chess games for statistical signs of engine assistance. Users can submit a Chess.com or Lichess game link, or upload a PGN file. The tool parses the game’s positions, players, ratings, and results, then evaluates each position with Stockfish running on its server. The analysis includes measures such as centipawn loss, agreement with Stockfish, position details, and how likely a player at a given rating is to choose each move. A custom machine learning model uses these features and both players’ ratings to produce a suspicion profile. According to the site, the model is trained on thousands of grandmaster games and is designed to reduce false positives among strong human players. Results indicate statistical anomalies and are not proof of cheating. Premium users can also watch a player profile so that new games are analyzed automatically.