CheckChess: Cheat Detector

Lost to someone who played a little too well? CheckChess tells you whether the feeling holds up, using their whole game history, not just one game. HOW IT WORKS 1. Enter a Chess.com or Lichess username, or paste a PGN from an over-the-board game. 2. Stockfish analyses the games right on your phone. 3. You get a 0-100 suspicion score and a report that shows exactly where it comes from. CATCHES WHAT ONE GAME CAN'T Many cheaters only use an engine in some of their games. A single-game checker can't see that. CheckChess looks at a player's whole history and compares it with people of the same rating, so selective cheating shows up as a pattern. The score is built from move accuracy, how often the player matches the engine's first choice, average centipawn loss and move-time patterns, all measured against typical play at their rating, not against a grandmaster. WHAT YOU GET • Account scans:…