Reference Tree Builder
From Repertoire Builder
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The Reference Tree is your personal chess theory database within Repertoire Builder. It lets you import games from Lichess, Chess.com, or PGN files and automatically organizes them into a unified move tree. You can compare this tree against your repertoires, libraries, and studies to spot gaps, overlaps, and deviations from established theory. By aligning your lines with trusted sources, exploring alternative continuations, and exporting or merging data as needed, the Reference Tree becomes an essential foundation for maintaining a complete, consistent, and well-informed opening repertoire.