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kokopu

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A JavaScript/TypeScript library implementing the chess game rules and providing tools to read/write the standard chess file formats.

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{ "event": "Missing nodes in variation", "mainVariation": [ "e4", "e5", { "notation": "Nf3", "variations": [ { "comment": "I'm a comment...", "nodes": null }, [ "Nc3" ], [ "f4" ] ] } ] }