ChessAnalyzer: Game Review

Find out why you won — and exactly where you lost. Then learn how to win more.

ChessAnalyzer reviews your chess games move by move with Stockfish 19, one of the strongest chess engines in the world, running right on your phone. Import or paste any PGN and get a complete game review: accuracy for both players, every move rated from Brilliant to Blunder, the critical moments that decided the game, and the better move you missed. Then sharpen up with opening courses and tactics puzzles.

No account. No upload. Your games stay on your phone.

On a computer? Use ChessAnalyzer free in your browser at chessanalyzer.net — your backup file opens there too.

★ FULL GAME REVIEW
• Accuracy for White and Black, with average centipawn loss
• Every move rated: Brilliant, Great, Best, Excellent, Good, Book, Inaccuracy, Mistake, Miss, Blunder
• A clear move-quality table for both players
• Critical moments ranked by how much they changed the game
• Evaluation graph — tap any point to jump to that move
• Plain-language explanations: what went wrong and what the engine preferred
• Tactical motifs spotted on the board: forks, pins, skewers, discovered attacks, back-rank threats

★ LEARN OPENINGS
• 46 courses — White: Italian, Evans Gambit, Ruy Lopez, Scotch, Four Knights, Vienna, King's Gambit, Queen's Gambit, London, Colle, Trompowsky, Catalan, English, Réti, King's Indian Attack, Smith-Morra and more. Black: Sicilian Najdorf, Dragon, Sveshnikov, Taimanov, French, Caro-Kann, Berlin, King's Indian, Nimzo-Indian, Grünfeld, Benoni, Benko, Semi-Slav, Dutch and more — plus famous traps like the Fried Liver, Stafford and Lasker Trap
• Every move explained — why it is played, not just what it is
• Learn mode walks you through the line; Practice mode makes you find the moves yourself, with hints when you are stuck

★ TRAIN TACTICS
• 160 puzzles across 11 themes: checkmate, mating attacks, back-rank mates, forks, pins, skewers, discovered attacks, trapped pieces, removing the defender, deflection and hanging pieces
• Every solution verified by Stockfish 19 as the only winning move
• Each puzzle comes with an explanation of the idea behind it

★ STOCKFISH 19 ON YOUR PHONE
• The real engine, not a cloud service: depth, nodes, speed and principal variations from the engine itself
• Up to five engine lines with best-move arrows on the board
• Analysis modes from Quick to Maximum, and Smart Deep Review: a fast pass over the whole game, then deep analysis of the moments that matter
• Works offline — on a plane, on a train, at the tournament hall

★ ANALYSIS BOARD
• Move the pieces freely and every move is judged as you play it
• See the opening name update live and the exact move where you leave theory
• Start from any position with a FEN, and save any line as a game

★ KNOW YOUR REAL STRENGTH
• An estimated performance for each game, based on the quality of your moves
• An estimated rating across your analysed games, with an honest error range
• Accuracy by game phase and performance charts, game by game

★ YOUR GAMES, YOUR PHONE
• Import PGN files or paste games exported from any chess website or app
• Game library with search
• Share games and reviews with friends or your coach
• Back up everything to one file and restore it on another device

★ BUILT WITH CARE
• Original piece set, move badges and wooden board sounds, designed for this app
• Modern light and dark design, portrait and landscape
• Free and open source under the GNU GPL v3 — the full source code is available

Estimated ratings are estimates from your analysed games, not official ratings.

ChessAnalyzer is free and supported by ads. Stockfish is free software licensed under the GPL v3; ChessAnalyzer is an independent app and is not affiliated with the Stockfish project or with any chess website.