The best tools to find your chess weaknesses

Everything in Audit Chess (29 free tools)

One Lichess or Chess.com username (or a PGN file) unlocks all of it. Free, unlimited, no account, and the analysis runs in your browser.

• Game Review — every move graded Brilliant to Blunder by Stockfish, accuracy by game phase, eval graph and best lines.
• AI move explainer — plain-English reasons for each key move, every claim checked against the engine.
• Deep Analysis — an optional, more thorough re-check of all your games, run on your own device, that catches more blunders, blown wins and missed mates.
• Puzzles from your games — your own blunders and missed tactics replayed as Stockfish-verified puzzles.
• Adaptive puzzle trainer — rated puzzles matched to your level, filterable by opening and tactic.
• Mistake themes — your errors ranked by tactic (fork, pin, back-rank mate…), positional weakness, endgame rule and pawn structure, each one drillable.
• Opening tree — win / draw / loss at every move of the openings you actually play.
• Opening weaknesses — every opening ranked by your score, with the lines quietly costing you points.
• Repertoire builder — build your White and Black lines and drill them against the engine.
• Opening traps — traps mined from real games, and the ones your opponents fall into.
• Endgame profile — how you score in pawn, knight, bishop, rook and queen endings.
• Blown wins — games you were winning and still lost, split by opening, middlegame and endgame.
• Missed mates — forced mates you missed and mates you allowed.
• Brilliant moves — every brilliant (!!) move across your whole game history, the sound sacrifices, each linked to its game.
• Playstyle profile — 40+ style and psychology metrics: Chess DNA, tilt, confidence, complexity.
• Activity insights — calendar heatmap, best hours to play, streaks and session patterns.
• Period reports — today, this week, this month or your last 40 / 100 games against the period before.
• Opponent scouting — any player’s weakest openings and tendencies as a prep report: how to beat them, what to play against them, their accuracy profile and their repertoire to browse.
• Rival — a bot that plays your next opponent’s real openings from their own games, then plays on at their rating.
• Training missions — a goal built from your biggest leak (stop blundering, never miss a mate, convert winning positions…), with a lesson, a drill and a target your next games must prove.
• Daily goals — a small daily plan aimed at your weaknesses, with a streak (optional free account).
• Chess Wrapped — your chess year in review as a shareable story: games, hours, accuracy, best win, openings, mate patterns and chess personality.
• Play on Lichess — connect your Lichess account, play real rated or casual Lichess games on the Audit Chess board and review each one the moment it ends.
• Game links — put auditchess.com in front of any Chess.com or Lichess game link (auditchess.com/game/live/<id>, auditchess.com/lichess/<id>) to open it straight in Game Review.
• Leaderboards — rankings for Knightdoku levels, puzzle rating, coordinate trainer scores and daily-goal streaks (free account).
• Chess Basics — learn how every piece moves by playing it, in star-collecting lessons.
• Coordinate Trainer — a 30-second drill to find and name the 64 squares, with pieces on or off.
• Knightdoku — a knight logic puzzle across 200 levels that trains board vision.
• Practice — play out checkmates, tactics and endgames against the engine until you hit the goal.