It's not a very detailed explanation but the write-up is here: http://techn.ology.net/visualize-move-protection-and-threat-status-in-chess/ http://techn.ology.n

It's not a very detailed explanation but the write-up is here: http://techn.ology.net/visualize-move-protection-and-threat-status-in-chess/ http://techn.ology.net/visualize-move-protection-and-threat-... It's written as a server program in Perl, but it's relatively easy to install and run on your own computer: > git clone https://github.com/ology/Chess-Inspector.git https://github.com/ology/Chess-Inspector.git > cd Chess-Inspector > perl Makefile.PL > make > sudo make install > perl bin/app.pl Then open http://localhost:3000 http://localhost:3000 in your web browser. Voila!