GNU Chess
| GNU Chess | |
|---|---|
GNU Chess 6.0.0 running with the XBoard front end, v. 4.1.5. | |
| Developer | GNU Project |
| Initial release | 1984 |
| Stable release | 6.3.0
/ 21 August 2025 |
| Operating system | Linux, Unix, macOS, Windows |
| Type | Computer chess |
| License | 2010: GPL-3.0-or-later 1992: GPL-2.0-or-later 1986: Chess-GPL |
| Website | www |
| Repository | |
| This article is part of the series on |
| Chess programming |
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GNU Chess is a free software chess engine and command-line interface chessboard. The goal of GNU Chess is to serve as a basis for research, and as such it has been used in numerous contexts.
GNU Chess is free software, licensed under the terms of the GNU General Public License version 3 or any later version, and is maintained by collaborating developers. As one of the earliest computer chess programs with full source code available, it is one of the oldest for Unix-based systems and has since been ported to many other platforms.