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Play

Face Stockfish across six strength levels, with a coach that shows you the best move and explains why it works.

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Analysis

A free board for both sides. Move any piece, even your opponent's, and watch the strongest continuations appear for White and for Black.

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Openings

From the Italian Game to the King's Indian: replay every line move by move, with the plans and main variations laid out.

Browse the library → ♝

Guides

Structured lessons on fundamentals, tactics, strategy and endgames, illustrated with positions on the board.

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Puzzles

Tactical problems sorted by difficulty, from one-move mates to legendary combinations, validated move by move.

Solve puzzles →