What accuracy actually measures
Accuracy is a single percentage that summarizes how close your moves were to the engine's best line across a whole game. 100% would mean you found the top move (or an equally good one) every time. It is derived from how much evaluation you lost with each move — smaller losses mean higher accuracy.
What counts as a good score
There is no universal cutoff, but as a rough guide:
- 60–75% — typical for beginners and casual blitz; usually a few real blunders in the game.
- 75–90% — solid club-level play; mistakes are smaller and less frequent.
- 90%+ — strong, clean games; common for experts and masters in calmer positions.
- 95–99% — near-perfect, often in shorter or more forcing games.
Why the number swings
Accuracy is highly position-dependent. A quiet, simple game inflates everyone's accuracy because there are fewer ways to go wrong; a sharp tactical brawl deflates it because one slip costs a lot of evaluation. That is why the same player can score 96% one game and 78% the next without playing differently. Judge accuracy across many games, not one.
How to raise it
Cutting blunders is the fastest lever — see blunder vs mistake vs inaccuracy. Run each game through a free game analysis, look at your biggest evaluation drops, and drill them as puzzles from your own games. A performance report tracks your accuracy over time so you can see the trend, not just one game.