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Chesscope

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Build one opening repertoire tree from your Lichess and Chess.com games at the same time, or from a PGN file. Includes Stockfish analysis, Lichess opening-book stats, and transposition-aware merging free, no account required.

Magnus Carlsen's white repertoire, built from two accounts at once DrNykterstein on Lichess and MagnusCarlsen on Chess.com merged into a single tree of 2,632 games. Each move shows how often it was played and its win/draw/loss split, with Stockfish 18 NNUE evaluating the position live.

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  • Updated Jul 2026

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  • Online
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What is Chesscope?

Chesscope turns any player's game history into an interactive opening tree. Unlike most repertoire tools, it pulls from Lichess and Chess.com in a single build, so your whole repertoire lives in one tree instead of two. Transpositions are detected and merged rather than duplicated, and every node shows win/draw/loss counts.

A built-in Stockfish 18 NNUE engine (multi-threaded where SharedArrayBuffer is available, with single-threaded and pure-JS fallbacks) evaluates any position without leaving the page. Connecting a Lichess account adds opening-book statistics from the Lichess explorer. Trees can be saved to a file and reloaded, and positions can be filtered by color, date and time control.

Also includes a searchable index of 1.1M+ broadcast games from the Lichess archive. Free, no login to build a tree, open-source under GPL-3.0.