Bookbuilder is a CHESS opening package that enables users to define, investigate, study, and improve their own opening repertoire. It features interactive replay/animation of all the openings listed with opening & variant name, as well as the ability to backcalculate large opening books and develop a personally special opening repertoire. It also provides the ability to read and add extensive comments for different opening positions, and export endnodes of the book to EPD format for import and analysis by chess engines.
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