This article is from the GNU Chess and XBoard FAQ, by Tim Mann email@example.com with numerous contributions by others.
This problem should not occur with WinBoard 3.4.1 and later. It used to
happen because some unzip programs (notably pkunzip) do not understand
long file names, so they would unzip gnuchess.lang as gnuchess.lan and
gnuchess.data as gnuchess.dat. I have changed the GNU Chess port
included with WinBoard to use the shorter names. However, if you want to
recompile WinBoard, you still need to use an unzip that understands long
file names, because some of the WinBoard source files still have long