CHEOPS (CHEss OPponent Simulator) is a fully-functional chess program capable of human-vs-human, human-vs-computer, and computer-vs-computer play. It uses a 64-square linear array board representation. The game tree search is alpha–beta, and the static evaluation function considers material, mobility, and motif features.

CHEOPS is written in ANSI C++ and as such should compile on any system with a conforming C++ compiler. A standard configure script is provided for Unix-like systems.

CHEOPS is Free Software. It can be freely used, modified, and distributed under the terms of the GNU General Public Licence.


The latest version of CHEOPS is 1.3, released on 2016-12-27. A list of changes from previous versions can be found in the change log.

Source code

You can download source packages for the current and previous releases on GitHub or You can also browse, download, or clone the development version on GitHub.

Fork me on GitHub

Ports and binary packages

Binary packages are available for several systems:

Note that, except for the SUSE packages, these packages are produced and hosted by third parties. I take no responsibility for them.


You can browse through the online HTML documentation. The source distribution includes the documention.


Configuring the computer opponentGame in progress


CHEOPS was conceived and written by Tristan Miller.