Analyse My Chess Game
Turn every game into a lesson. Get an instant, move-by-move review with an accuracy score, blunder detection, a piece heatmap, time-pressure insights and badges — free, no ads.
What your game review shows
Five clear views of your play, so you know exactly what to work on next.
CAPS Accuracy Score
See how good your moves really were. The CAPS score measures your average centipawn loss per move and grades your play with clear, colour-coded bands — so you instantly know whether a game was clean or full of missed chances.
Score a game →Blunder & Mistake Detection
Every blunder, mistake and inaccuracy is flagged move by move, with the better move shown. Stop repeating the same errors by seeing exactly where each game slipped.
Find your blunders →Piece Heatmap
A visual breakdown of which pieces cost you the most — pawn, knight, bishop, rook or queen. Discover your weak spots and target them in training.
View your heatmap →Time-Pressure Analysis
Compare your accuracy at normal speed versus when the clock is low. If your play falls apart under pressure, you'll see it here — and know what to practise.
Check time pressure →Session Badges
Earn badges as you improve — Blunder Buster for a clean game, Endgame Apprentice, Opening Scholar and Precision Master. A fun way to track real progress between sessions.
Earn badges →Why review your games
The fastest way to improve is to learn from your own games. Instead of guessing where things went wrong, Chess Nexus pinpoints your blunders, shows the better moves, reveals which pieces and which moments cost you, and tracks your accuracy over time — all free and ad-free.
Frequently asked questions
How can I analyse my chess game for free?
Open the analysis tool on Chess Nexus, load your game and get an instant move-by-move review — accuracy score, blunder detection, piece heatmap and more — completely free, with no ads.
What is a CAPS / accuracy score?
It's a single number that summarises how accurately you played a game, based on your average centipawn loss per move. A higher accuracy and lower loss means cleaner, more precise play.
Will analysis tell me where I went wrong?
Yes. The review flags every blunder, mistake and inaccuracy, shows the stronger move, highlights which pieces let you down and reveals whether time pressure hurt your accuracy.
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Every feature is free with no ads. Pick where you want to grow next.
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Structured lessons and tests — basic tactics, openings, endgames and positional play — chapter by chapter.
Learn more →Chess Community
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