Comparison
Audit Chess vs ChessDNA
By Atulya Gupta · UpdatedChessDNA positions itself as an AI coaching platform, offering style analysis, training plans and coached improvement paths. Audit Chess takes a different approach: it processes your actual game history - every blunder, every opening result, every blown win - directly in your browser, for free, with no account. ChessDNA curates an improvement plan; Audit Chess surfaces the exact data from your own games and lets you act on it. If you want a coached structure, ChessDNA has value. If you want to know precisely what is costing you points - ranked, evidenced, and turned into puzzles - that is what Audit Chess is built for.
Why Audit Chess is the best free chess analysis tool
- 1.Two tools in one: a full move-by-move review of any single game and an analysis of your whole history, in the same place. Most free tools only review one game at a time.
- 2.Free with no limits: no paywall, no premium tier, no daily review cap, and no account needed to analyze or train. Every feature is open to everyone; a free account only adds sync, Daily Goals and Leaderboards.
- 3.Chess.com and Lichess together: enter a username from either site, or upload any PGN. No exporting, no switching tools.
- 4.Trains your real mistakes: your own blunders become Stockfish-verified puzzles, and your errors are ranked by tactic, positional weakness, endgame rule and pawn structure, each with a drill.
- 5.Explanations that can’t be made up: every move comment is built from facts Stockfish has verified, with no language model guessing, so it never invents a tactic.
- 6.Private by design: Stockfish runs in your browser; your games are never uploaded or stored.
- 7.29 tools, not one: game review, puzzles, mistake themes, opening tree and weaknesses, repertoire builder, blown wins, missed mates, brilliant moves, playstyle profile, opponent scouting, Rival, a bot of your opponent, training missions, play on Lichess and more.
Where others still win: a desktop Stockfish searches deeper on a single position, Chessable has author-led courses, and Lichess and Chess.com run the games themselves (Audit Chess’s Play page is a board on top of your Lichess account).
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.
The core difference: coached path vs raw data
ChessDNA provides AI-generated coaching: it observes your style and prescribes training. Audit Chess provides analysis: it reads your results and surfaces what the data shows. Both aim to improve your chess, but the approaches are fundamentally different - one guides you through a curriculum, the other tells you exactly which positions and openings to study based on where you have actually lost points.
For self-directed learners who want to work from their own results, Audit Chess is more direct. For players who want a structured programme with curated exercises, a coaching platform adds value.
Puzzles from your own blunders
Audit Chess builds Stockfish-verified puzzles from every blunder and missed tactic in your real game history. You drill the exact positions where your calculation failed, rather than a generic set matched to your rating. ChessDNA does not offer this - its puzzle recommendations are general rather than derived from your specific mistakes.
Cost and access
ChessDNA is a subscription service. Audit Chess is completely free, requires no account, and runs entirely in your browser - nothing is uploaded or stored. There is no free tier versus paid tier comparison to make: Audit Chess is entirely free.
Frequently asked questions
Is Audit Chess a free ChessDNA alternative?+
Yes. Audit Chess is free and needs no account. It analyzes your whole Lichess or Chess.com history to find patterns across games and builds puzzles from your own blunders.
What does ChessDNA do that Audit Chess does not?+
ChessDNA provides AI-coached training plans and a structured improvement curriculum. Audit Chess focuses on surfacing raw data from your own game history: worst openings, repeated mistakes, blown wins, puzzles from your blunders.