ChessAnalysis

ChessAnalysis reviews your chess games for free with no daily limit. Enter a Chess.com or Lichess username or paste a PGN and Stockfish 19 analyzes every move in your browser: accuracy for both players using the open Lichess formula, an evaluation graph, every inaccuracy, mistake and blunder, and a short explanation of your three biggest mistakes with the move you should have played. You can retry each mistake on the board, share the review and download an annotated PGN. The site also has a chess analysis board with live engine lines, a next chess move calculator for study, a board editor, an online chess clock with increment, a FIDE Elo calculator, a chess board setup guide and an explainer of how chess accuracy is calculated. Not affiliated with Chess.com or Lichess.