Offline Chess Analyzer door NoobieDoobie

A Firefox extension that reviews your chess games on your own machine — Stockfish in a WASM worker, an offline opening book, and not a single position leaving the browser.

Beschikbaar in Firefox voor Android™

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Over deze extensie

The extension opens its own analysis page — it does not overlay chess.com or any other site — and runs the
engine inside that page. Load a game and every move is graded; step through it, or stop anywhere and play your
own line to see where the alternative would have gone.

Whole-game review that classifies every move with an Expected Points model, running across a pool of engines.
Real opening-book classification (Book) from an offline ECO database, not a guess from move numbers.
Terminal positions decided by the rules — checkmate, stalemate and draws are scored directly instead of
being handed to the engine.
Evaluation bar and timeline scrubber, in pawns or expected points.

Interactive what-if play from any position in the game, including underpromotion.
An unbounded move tree — every alternative you play becomes a variation under the move it branched from.
Live MultiPV analysis of the position on the board, with a best-move arrow.
Board and piece themes, board flip, and a reset that drops back to the reference line.

Trap finder — moves that are sound for you and that opponents at your rating tend to
answer badly, found by crossing the Lichess opening explorer with the local engine.

PGN paste, or a custom start FEN.
Player Elo picked up from the PGN tags (WhiteElo / BlackElo) when they are there.
One-click import from a chess.com archive.

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Offline Chess Analyzer door NoobieDoobie

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