Free tool
Chess player analyzer
Analyze any chess player from their entire game history and get a scouting dossier - opening tendencies, recurring mistakes, tactical and endgame weaknesses, playing style, and activity patterns. Not another single-position engine board: the whole point is the patterns that only show up across hundreds of games. Free, in your browser, no account.
What the dossier covers
Enter a Lichess or Chess.com username and Audit Chess reads that player’s public games and profiles them across six dimensions:
Opening tendencies
Every opening the player reaches, as an interactive tree ranked by their real win/draw/loss results - so their pet lines and their soft spots are obvious at a glance.
Opening tree →Recurring mistakes
The blunders and missed tactics they make again and again across games, not just in one - the patterns that actually predict how the next game goes.
Find weaknesses →Tactical & endgame weaknesses
Where their calculation breaks down and how they handle rook, minor-piece and pawn endings - the phases where they quietly leak points.
Endgame analysis →Playing style
Aggressive or solid, tactical or positional, risk-taking or risk-averse - a style profile built from how they actually play, not a self-description.
Playstyle profile →Activity patterns
When they play, how long their sessions run, and when their results are strongest or weakest across the day and week.
Activity insights →Opponent preparation
Their weakest openings turned into concrete preparation - the exact lines to steer toward, matched to your own repertoire so you play what you know.
Opponent scouting →Why history beats a single position
A Stockfish board tells you the best move in the position in front of you. That is useful, but it tells you nothing about the player. To understand a player you have to look at what they do repeatedly: the openings they trust, the moment their accuracy drops, the endings they misplay, the way they respond after a loss. Those signals only emerge across a body of games.
Audit Chess is built for exactly that scale. It analyses a player’s whole history at once and turns it into a profile you can act on - whether you are studying your own play or preparing for a specific opponent.
Scout an opponent, or audit yourself
Point it at an opponent before a rated game or a match and you get their weakest lines plus preparation matched to your repertoire. Point it at yourself and the same engine becomes a mirror: your worst openings, the blunders you repeat, the winning positions you throw away, and puzzles built from your own mistakes. Start with opponent scouting or a full self-analysis.
Frequently asked questions
How do I analyze a chess player?+
Enter any Lichess or Chess.com username and Audit Chess reads that player's full public game history, then builds a profile: their most-played openings ranked by result, the mistakes they repeat, their tactical and endgame tendencies, their playing style and when they play. It runs in your browser, free, with no account.
What makes this different from a normal engine analysis board?+
An engine board evaluates one position at a time. A player analyzer works across hundreds of that player's games to find patterns no single position shows - which openings they score badly in, the tactics they miss, how they handle endgames, and how their style trends over time.
Can I analyze my own play or an opponent?+
Both. Enter your own username to see your strengths and leaks, or an opponent's username to scout them before a game and get the exact lines to prepare, matched to your own repertoire.
Is it free? Does the player need an account with you?+
It is free and needs no account from anyone. Games are read from the public Lichess and Chess.com APIs and analyzed entirely in your browser - nothing is uploaded or stored.
Audit Chess is free and not affiliated with Chess.com or Lichess.