An automatic practical Chess opening repertoire builder.
If you want to understand why this exists, how it works, or get example repertoires, check here:
The awesome @drauf has built an interface. It should be much more self explanatory now!
I'm no longer actively udpating BookBuilder, but the good people at https://chessbook.com/ have implemented many of the principles in a much more user friendly way. If you're interested in building your own repertoire I would start there. I'm not affiliated in any way.
Thanks to creators like Ben Johnson, Daniel Lona, Nate Solon, and Marcus Buffett, for all their ideas and inspiration. Thanks also to David Foster for Chess Trap Scorer, which was not just part of the inspiration, but also all of the starting point code wise for this program.
The lichess opening API is used to gather data for the analysis. No token is required.