I programmed a replayer of chess moves from Portable Game Notation, such as Milman v Fang, 2005, with FlaskChess for the server and python-chess for the logic (thanks to Python library to process Portable Game Notation in chess). I use it to replay games and to visualize openings. Although it's working, alternative game lines (or tree branches) are awkward and I wonder if I am reinventing the wheel.

I'm looking for an existing chess replayer that can take strings in Portable Game Notation such as 1. e4 c6 for the Caro-Kann, display them visually, and nicely represent alternative branches.

Does it already exist?


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