I’m looking for a program that will open, and otherwise manipulate, FEN notation files (.fns is the file suffix). Running Win10 here, any help appreciated.
I assume you are already familiar with the format and searched “fen notation” on the web like Forsyth-Edwards Notation. Any text editor can manipulate it.
If you need to print a chess diagram, this might help.
Chessbase?
Alex Relyea
Try this site also:http://www.jinchess.com/chessboard/composer/