Chess game analysis and PGN import

Review a tournament or online chess game with Stockfish: import a PGN, explore the moves and calculate AiChess accuracy.

Open Review: Enter moves lets you move both sides, including from a custom position set up with pieces or loaded as FEN. Choose Finish and review when the game is over. Upload PGN lets you upload a file or paste notation instead. Select the side you played, confirm that the game has ended and choose Import and review. You can also review games played directly on AiChess.

Quick review examines every move and lets you browse the board. Early judgements are provisional: select a move, compare the position before and after it, and replay the engine continuation.

Calculate accuracy % starts deeper analysis while quick review remains available. White and Black percentages appear when analysis finishes, provided each side has at least five eligible decisions. A dash means insufficient data. This is an AiChess metric, not Elo or proof of outside assistance.

Import one game at a time, up to 600 half-moves and 96 KB. Review follows the main line; comments and variations remain in the PGN. Player names, event, date and result help identify games in your private archive. Imports do not change your rating.

Register an account within your guest session to retain access on other devices. Reviews are private; importing and analysis require a server connection. Only analyse finished games, without using engine help during a live match.

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