what’sthisposition
Paste a PGN from any site or app, or drop the .pgn file on the page. Stockfish labels every move from Brilliant to Blunder and explains why, right in your browser.
The Chrome extension reviews your Chess.com games right where you play them.
A screenshot from a game, a FEN or a board you set up. It shows the threats, weaknesses and plans for both sides on the board, checked by Stockfish.
Real exports from real apps, not only tidy files.
Exports from Chess.com, Lichess, ChessBase and other apps, with their headers, comments, clock times, variations and annotation symbols. A bare move list (1. e4 e5 2. Nf3 Nc6 …) works too. Every move is checked against the rules before the review starts.
Drop or paste a file with many games, such as a tournament's, and pick the one to review. Files can be up to 5 MB.
Both players' accuracy, a label for every move from Brilliant to Blunder with an explanation, the evaluation graph and key moments, and the opening with how long the game followed theory. You can play your own moves on the board and open any position for a deeper analysis. How each label is decided.
About reviewing a game from its PGN.
Portable Game Notation: the plain-text format for chess games. The players, date and result sit in square brackets at the top and the moves follow. Every chess site and app can export it.
Yes. A PGN with a FEN header (as sites write for games from a position) is replayed from that position.
The review follows the game's main line; comments, side variations and annotation symbols are skipped. During the review you can play your own moves on the board, and they're analysed as a side line.
No. It's read and analysed in your browser and never leaves your device.