Stockfish 19 · Opening book · Endgame tablebases

Find the best move. See how well you played.

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Stockfish 19 · livedepth 41

#216. Qb8+ Nxb8 17. Rd8#

+6.3316. Qb7 f6 17. Qc8+ Ke7 18. Be3 g5 19. Qc7

+6.2516. Qc3 f6 17. Qc8+ Ke7 18. Be3 g5 19. Qc7

Morphy vs Duke Karl & Count Isouard, Paris 1858. White to play and mate in two.

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≤ 7 piecesendgames answered perfectly by tablebases

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How it works

The fastest answer is the one we already know

1
Endgame? Exact result.
With seven pieces or fewer, tablebases give the perfect move and whether it wins, draws or loses.
2
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Positions analysed deeply before come back in milliseconds, checked before we show them.
3
New position? Live Stockfish.
Stockfish 19 calculates it on our servers and streams the best lines as they improve.

Sample review

Even Morphy missed one

A real Stockfish 19 review of the Opera Game, Paris 1858, with each player's accuracy. Click any move to see what the engine preferred.

C41 Philidor Defense

WhitePaul Morphy98.0 % Accuracy1 inaccuracy0 mistakes0 blunders

BlackDuke Karl / Count Isouard79.5 % Accuracy2 inaccuracies3 mistakes0 blunders

6. Bc4InaccuracyStockfish preferred Qb3Evaluation after the move: +1.46

1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.

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Questions

Is it free?

Yes. Every account gets eight hours of live engine time a day. Endgame tablebases and positions we have already analysed don't count towards it.

Do I need to install anything?

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Which engine do you use?

Stockfish 19, the strongest open-source chess engine, running on our servers. Endgames with seven pieces or fewer come straight from Syzygy tablebases, six and seven pieces from the Lichess tablebase server.

Can I bring my games from Lichess or Chess.com?

Yes. Enter your username and we import your latest 20 games. Importing again adds only the new ones. You can also drop a PGN file into your library and export any game as PGN.

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