Mega Chess Analysis: Check All Your Mistakes From Hundreds of Games

Paste your games or enter a Lichess or Chess.com username. The report finds the mistakes that repeat across your games, ranks them by the points they cost and links each one to a drill, puzzle set or trainer.

Paste your games (PGN) , up to 300 games at once from any site or program that exports PGN.

Drop your .pgn here

Upload a .pgn file

For more accurate results, your PGN should include the rating at the time of each game (missing ratings are estimated by our neural network), the time control, who played White and Black, and the moves of the game.

or paste your username

Lichess

Pulls up to 300 of your recent Blitz, Rapid, and Classical games from Lichess.org. Builds a report for each time control or one for all of them.

Chess.com

Pulls your recent Blitz, Rapid, and Classical games from Chess.com and analyzes the latest 50. Chess.com exports no engine analysis, so your browser evaluates each game itself. Expect a few minutes.

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Position workspaceAnalysis boardLegal moves, FEN and PGN import, engine lines at the depth you set. Build a positionBoard editorPlace pieces, set all six FEN fields, pass the board to another tool. Calculate firstChess Next Move CheckerCommit to your move before Stockfish reveals its line. Rating mathElo calculatorExpected score and rating change, with the formula shown. Game collectionPGN filterKeep games by player, color, result, rating, date or ECO code. You are hereMega Chess AnalysisReads your recent games and ranks the leaks holding your rating back.