GNUChess

GNU Chess
Contains GNUChess Atari, Chess, Computer chess and source code of these for different platforms
http://users.telenet.be/artificialintelligence/chess/indexGNUChess.html

GNU Chess version 4.0b5 for Apple Mac
Apple Mac port of GNU Chess.
ftp://ftp.gnu.org/pub/gnu/gnuchess/gnuchessMAC40b5.hqx

Official site for GNU Chess by the Free Software Foundation (FSF)
The official web site for the Free Software Foundation's chess program. This can be used as an engine for Xboard and Winboard.
http://www.gnu.org/software/chess/chess.html

Tim Mann's Chess Page - GNU Chess
Tim Mann's GNU page. A very useful resource for GNU Chess. It includes an FAQ.
http://www.tim-mann.org/gnuchess.html