Free online chess game analyzer and PGN analysis board
Use Ferzia as a free chess game analyzer or PGN analyzer: paste a FEN or PGN — or just start moving pieces — for instant Stockfish evaluations running in your browser. To analyze your chess game, replay every move, compare 1, 3, or 5 engine lines, browse master-game statistics for the current position, and test alternatives on the board. No account is required.
Frequently asked questions
Is the chess analysis board free to use?
Yes. Loading a position, making moves, and running the Stockfish engine are all free with no account required. Signing in is only needed to save an analysis to your library or share a link to it.
What chess engine powers the analysis?
Stockfish, one of the strongest chess engines in the world, running client-side via WebAssembly (multi-threaded where your browser supports it) — nothing is sent to a server to compute the evaluation. Toggle between 1, 3, or 5 engine lines from the toolbar.
Can I import a game or set up a custom position?
Yes — use "Load FEN" or "Load PGN" from the menu to import a position or a full game, or tap the setup icon to place pieces by hand, set castling rights and en passant, and choose the side to move.
Does it show opening names and statistics?
Yes — the built-in opening explorer panel shows the ECO code, opening name, and win/draw/loss statistics from millions of master games for whatever position is on the board.