GNU Go Documentation
3.3 Ascii Interface
Even if you do not have CGoban installed you can play with GNU Go
using its default Ascii interface. Simply type
at the command line, and GNU Go will draw a board. Typing
help will give a list of options. At the end of the
game, pass twice, and GNU Go will prompt you through the
counting. You and GNU Go must agree on the dead groups--you
can toggle the status of groups to be removed, and when you
are done, GNU Go will report the score.
You can save the game at any point using the
command. You can reload the game from the resulting SGF file with
gnugo -l filename --mode ascii. Reloading
games is not supported when playing with CGoban. However you can
use CGoban to save a file, then reload it in ascii mode.