
This article is from the GNU Chess and XBoard FAQ, by Tim Mann mann@pa.dec.com with numerous contributions by others.
1) On Unix systems:
- Add the following line to the file .mime.types in your home directory.
(Create the file if it doesn't exist already.)
application/x-chess-pgn pgn
- Add the following line to the file .mailcap in your home directory.
(Create the file if it doesn't exist already.)
application/x-chess-pgn; xboard -ncp -lgf %s
- Exit from your Web browser and restart it.
2) On MS Windows systems:
The exact procedure depends on which Web browser you are using. The
current version of WinBoard automatically configures itself as your PGN
viewer for local files, Netscape 4.x, and Internet Explorer.
In Netscape 3.x, go to Options / General Preferences / Helpers, click
the button to make a new MIME type, and fill in the boxes:
Mime type: application
Mime subtype: x-chess-pgn
Extension: pgn
Application command line: "C:\Program Files\WinBoard\WinBoard" -ncp -lgf "%1"
Change the pathname for WinBoard if you installed it in a different
directory.
3) To confirm that your external viewer configuration is working, open
the following URL and click on any of the game names shown:
http://www.research.digital.com/SRC/personal/Tim_Mann/chess.html#PGN
 
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