1) PGN is "Portable Game Notation,” and EPD is "Extended Position Notation.” These are standards respectively for storing games and positions so that other software can read them. Many chess-playing programs and chess database programs support this format. Large archives of PGN files can be found on AOL (go to keyword “Chess,” then click on "Chess Forum" and then "Chess Club Library "). On the Internet, there are over 250,000 games at ftp.pitt.edu under
group/student-activities/chess/Uploads (on the Web at <http://www.pitt.edu/~schach>). MacChess reads the first 500 games in a PGN file. If there are more, split the file into chunks with 500 games or less with a text editor like BBEdit Lite.
2) "Permanent Brain" means the computer thinks on your time, that its "Brain" is "Permanently" active. If MacChess beats you all the time, you may want to turn this off, and give MacChess a short time to think in the "Level" menu. Giving MacChess a small time without turning off Permanent Brain has much less effect, since it thinks on your move. If it still wins too often, use the "Setup" option so that it starts the game without one of its pieces - such as a Queen ("Queen odds") or Rook ("Rook odds"). As you improve, you can move from Queen odds to Rook odds to Knight odds to Pawn odds.
3) Information about Macintosh computer chess software and utilities can be found on the Web in the "Macintosh Chess FAQ" at:
4) A MacChess web site is maintained by Richard A. Fowell. It includes download links, links to other Macintosh chess web pages, screen shots, etc. It is at: