This package is based on the package go written in 1991 by Hanna 
Ko\u0142odziejska which provides typesetting facilities for Go games
and positions. Although igo contains roughly the same commands
as the original package and uses the fonts created by
Ko\u0142odziejska, it has been improved in a number of ways. It uses
command names less likely to conflict with standard AMS
packages. It allows different board sizes to be used. It
understands a standardized notation for board coordinates. And
it provides a facility to work on more than one board.
Moreover, a few commands were reworked to define positions or
game sequences more conveniently.