Chess − GNU Chess
GNU Chess 6.2.9 Copyright © 2021 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
Play the game of chess.
display this help and exit
display version information and exit
make the program silent on startup
same as −q
start in engine mode
start up showing thinking
disable thinking in opponents time
enable manual mode
enable UCI protocol (externally behave as UCI engine)
−M size, −−memory=size
specify memory usage in MB for hashtable
−a filename, −−addbook=filename
compile book.bin from pgn book ’filename’
enable graphic mode
Options xboard and post are accepted without leading dashes for backward compatibility.
Moves are accepted either in standard algebraic notation (SAN) or in coordinate algebraic notation.
The file ’gnuchess.ini’ allows setting config options if −−uci is not used. See ’info gnuchess’ for details. The file is looked for in three locations according to this precedence: current directory, the directory pointed to by environment variable GNUCHESS_PKGDATADIR, or the package data directory stated at configure time.
Report bugs to <bug−gnu−email@example.com>.
The full documentation for Chess is maintained as a Texinfo manual. If the info and Chess programs are properly installed at your site, the command
should give you access to the complete manual.