The Gullydeckel chess engine has been written between 1995 and 2001 by
Martin Borriss and is available free of charge on the terms of the GNU
General Public License (GPL).
You can use Gullydeckel with Linux and Windows. Most people integrate Gullydeckel with a graphical chess board such as WinBoard (Gullydeckel supports the XBoard/WinBoard API). You can also use Gullydeckel as an analysis engine for the commercial Chessbase database or batch-process chess positions from FEN files.
There won't be any active development anymore.
You can find some brief general information (README), build information, Author information and licensing (also the file named GPL included in the distribution ).
If you have Gullydeckel itself available, you can get some brief information by typing "gully2 -h". You may also use the built-in 'help' command in interactive mode.
The Winboard Engine (most popular).
Clone the github repository:
git clone https://github.com/borriss/gully.git.
Program sources (ANSI C) and
documentation are here as [gzipped tarball] or [zip]. It should be ready to make and go for both Linux and
Gullydeckel has been a fun project evolving from an engine playing legal chess to a serious opponent.