ChessLineBook
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Analyze any chess game.
Learn the lesson.
A full Stockfish report in your browser: accuracy for both sides, every blunder on its own board, the theory you left, and a plain-English lesson behind each mistake. Works with Chess.com and Lichess.
✓ Runs Stockfish on your device. The game never leaves your browser.
Recent games
Analyzing…
Warming up the engine…
WhiteWhite
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Accuracy
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BlackBlack
The game in short
Your last games
Tap a game to open its full report below.
Which player were you?
The report coaches one side — badge, best-move arrows, and lessons follow your seat.
Watch the game
Move the pieces to try your own ideas — the engine follows along.
Evaluation
The clocks
Material
Player radar
Show mistakes for:
Opening theory
What actually went wrong
Don't make the same mistake twice.
Save these positions to your LineBook and drill them until the right move is the one your hand plays. Open ChessLineBook — free