There are many chess engines such as Crafty, Fruit and GNU Chess that can be downloaded from the Internet for free.

* http :// alumni. imsa. edu /~ stendahl / comp / txt / gnuchess. txt-Heuristic function used by GNU Chess in 1987

Originally developed by Tim Mann, these programs are compatible with various chess engines that support the Chess Engine Communication Protocol such as GNU Chess.

GNU Chess -

GNU Chess is a computer program which plays a full game of chess against a human being or other computer program.

The goal of GNU Chess is to serve as a basis for research.

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.

GNU Chess has been ported to many other platforms.

On basic, current computer chess architecture, GNU Chess plays at senior master / weak international master strength ( 2500 + Elo on simple hardware-Intel Core 2 Duo ), without parallel processing, according to the IQ6 test suite.

Initial versions of XBoard's Chess Engine Communication Protocol were based on GNU Chess's command line interface.

The first version of GNU Chess was written by Stuart Cracraft.

Dozens of programmers have enhanced and expanded GNU Chess.

In 2011, GNU Chess underwent transition to version 6, which is based on Letouzey's Fruit 2. 1 chess engine.

Some GNU Chess enthusiasts still maintain the 5. 07 code base, adding new features and making it stronger.

version of GNU Chess 5 is about 350 Elo stronger than the original FSF version.

It is still weaker than GNU Chess 6 however.

de: GNU Chess

es: GNU Chess

fr: GNU Chess

it: GNU Chess

nl: GNU Chess

nds: GNU Chess

pl: GNU Chess

See the GNU

See also: GNU.

* Article in " Linux Magazine ", April 2004: " GNU Zebra "

The Artistic License refers most commonly to the original Artistic License ( version 1. 0 ), a software license used for certain free and open source software packages, most notably the standard Perl implementation and most CPAN modules, which are dual-licensed under the Artistic License and the GNU General Public License ( GPL ).

Schelter is credited with the development of the GNU Common Lisp ( gcl ) implementation of Common Lisp and the GPL'd version of the computer algebra system Macsyma called GNU Maxima.

AKCL eventually became GNU Common Lisp.

He is also credited with the first port of the GNU C compiler to the INTEL 386 architecture, used in the original implementation of the Linux kernel.

Released in 1989, it has been distributed widely as the shell for the GNU operating system and as the default shell on Linux and.

This license is a 2-clause BSD license with an additional copyleft clause similar to the GNU GPL version 2's Section 3, requiring source code of an application using Berkeley DB to be made available for a nominal fee.

Non-profit software organizations include the Free Software Foundation, GNU Project and Mozilla Foundation.

; GNU Common Lisp ( GCL ): The GNU Project's Lisp compiler.

The project is releasing material under the GNU GPL.

After a long history as proprietary software, it was released as free software on 6 August 2012, under the GNU Lesser General Public License.

It is free and open source software, released under the GNU General Public License version 3.

Cygwin consists of a library that implements the POSIX system call API in terms of Win32 system calls, a GNU development toolchain ( including GCC and GDB ) to allow software development, and a large number of application programs equivalent to those on Unix systems.

Many Unix, GNU, BSD and Linux programs and packages have been ported to Cygwin, including the X Window System, K Desktop Environment 3, GNOME, Apache, and TeX.

Red Hat normally licenses the Cygwin library under the GNU General Public License version 3 with an exception to allow linking to any free and open source software whose license conforms to the Open Source Definition.

Cygwin began in 1995 as a project of Steve Chamberlain, a Cygnus engineer who observed that Windows NT and 95 used COFF as their object file format, and that GNU already included support for x86 and COFF, and the C library newlib.

The next step was to attempt to bootstrap the compiler on a Windows system, requiring sufficient emulation of Unix to let the GNU configure shell script run.

Most include the familiar GNU and / or Unix development tools, including make, yacc, lex and a cc command which acts a wrapper around a supported C compiler.

MinGW is a native software port of the GNU Compiler Collection ( GCC ) to Microsoft Windows, along with a set of freely distributable import libraries and header files for the Windows API.

Debian () is a computer operating system composed of software packages released as free and open source software primarily under the GNU General Public License along with other free software licenses.

Debian GNU / Linux, which includes the GNU OS tools and Linux kernel, is a popular and influential Linux distribution.

Debian GNU / Hurd is the Debian project's distribution of the GNU operating system, using the GNU Hurd microkernel.