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Chess application whichs allows working with chess PDF books and PGNs.
...JDK-17 compatibility
You will find more about it at this web sites:
https://chesspdfbrowser.com?origin=sourceforge
https://www.frojasg1.com:8443/downloads_web/web/html/chessPdfBrowser.html?origin=sourceforge
Calculate the number of solutions to place n queens on an n*n chess board, without any queen attacking each other. Options allow using rooks instead of queens, disabling knight attacks and setting the minimum distance between queens.