This is a portable (Linux/MacOSX/Windows) version the Gull chess engine version 3.
To build simply run make (from a terminal) in the src directory.
To build syzygy Gull run make syzygy (from a terminal) in the src
directory. Note that the Makefile uses wget to automatically download
the Fathom dependency (https://github.com/basil00/Fathom).
Pre-built binaries are available here: https://github.com/basil00/Gull/releases
The original Gull 3 source code is "public domain". New modifications are released under the MIT License.