LibreOffice 26.2 Press Kit: nextcloud.documentfoundation.org/s/eDiocN8Gak6jDKx
What is Light Gathering Power (LGP)?，更多细节参见whatsapp
Piece encoding: integers from -6 to +6 (positive = white, negative = black, 0 = empty)，这一点在谷歌中也有详细论述
The algorithm gets you a valid map. Making it look like a place you'd want to visit is a whole separate problem.