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Bookbuilder opensource, based on old version
Bookbuilder 3.5 (with full minimax
but no opening names) and Bookbuilder 4.3
with openings names, and line minimax
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User Reviews
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has been a commercial project for some years (from about 20 yrs ago to about 3 yrs ago) but i got a pension now and no need to sell it anymore; also open source is the way to go i think for possible further development (or re-development from scratch)/; Unique features amongst others are the minimax (of end positions, thus making it easier to make a solid opening repertoire), a fully transpositional database, and a large list of opening names, much more accurate than eg with the commercial (and expensive) program Chessbase. (nowadays chess.com also can name opening names quite accurately. There also is an opening training option btw For further info see the readme.txt NB the program isn't supported anymore, and i probably also won't answer questions or giving further explanations unless someone makes a paypa donation (as in the readmet.txt)