e5 is a book move +0.27Mirroring your first move and opening lines for the dark-squared bishop and queen.
D
Duke Karl / Count Isouard
P
Paul Morphy
Paris, 1858
Free · Stockfish 19 · No account
Find your brilliant moves
Stockfish 19 grades every move of your game, from brilliant to blunder, and a coach tells you why in plain words. Free, unlimited, right in your browser.
Or watch it review Morphy's Opera Game →Ten grades. One glance.
BrilliantGiving up a piece, and it's the best move.
GreatThe only good move in a critical moment.
BestStockfish's own first choice.
ExcellentAlmost as strong as the best.
GoodA decent move that gives up a little.BookA known move from opening theory.
InaccuracyA small slip.
MistakeA clear error.
MissYour opponent slipped and you let it go.
BlunderA move that throws the game away.A coach for every move
Not just numbers: what the move does, what went wrong, and what was better.
e5 is a book move +0.27 Qb8+ is brilliant M1Sacrificing the queen to force checkmate!
Nf6 is a blunder M1White can now force checkmate in 1. The best move was g6, defending the pawn on f7.
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Seven levels, from a beginner who hangs pieces to Stockfish 19 at full strength. When the game ends, one click reviews it with the coach.
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Good to know
Is it really free?
Yes. The engine runs on your own computer or phone, so there is nothing to pay for and no account to make.
Is my game uploaded anywhere?
No. Your game is fetched straight from Chess.com or Lichess into your browser, and Stockfish analyses it there.
Which engine is it?
Stockfish 19, compiled to run in the browser. Several copies work side by side, so most games take under a minute.
Why is my accuracy a bit different from other sites?
Every site uses its own formula and engine settings. ASTRA Chess uses the accuracy formula Lichess published.