Free chess accuracy checker
Find out how accurately you played—and which moves caused the score. Paste a game to get accuracy, performance rating, move labels and the evaluation graph.
Review your game now
Accuracy is more than matching the engine
A useful accuracy score measures how much winning chance each move gave away. A quiet move in a balanced position and a pawn loss in a winning position should not count the same, so each move is scored relative to the position before it.
See the moves behind your score
A percentage on its own does not tell you how to improve. The review also shows your biggest mistakes, blunders, brilliant moves, best alternatives and the point where the evaluation swung. Read the full method on the chess accuracy calculator page.
Check any game free
Paste a Chess.com or Lichess game, paste a PGN, or search a Chess.com username. There is no account, no daily limit and no upload.