Open Source C Chess Games

"Shane's Chess Information Database" is a huge chess toolkit with extensive database, analysis and chess-playing features. Scid vs. PC is a usability and bug-fix fork of Scid. It has many interface fixes and improvements, and is fully compatible with Scid's .si4 databases. New features include a rewritten Gamelist, Computer Tournament, and FICS, Tree, Book and Graph improvements.

GCompris is a high quality educational software suite comprising of numerous activities for children aged 2 to 10. Some of the activities are game oriented, but nonetheless still educational.

Scidb is an open-source chess database application for Windows, Unix/Linux. It is a new development inspired by Scid.

CBoard (Curses/Console Board) is an Ncurses frontend to chess engines supporting the XBoard protocol. Supports reading and writing PGN including roster tags, RAV, FEN, NAG and comments, lots of configuration options, UTF-8, different board sizes depending on the terminal and more.

OliveChess is a simple chess engine compatible with modern chess interfaces such as ChessBase products, Arena and XBoard/Winboard. The engine supports UCI and XBoard protocols. Note: in order to use it as an xboard engine you may need Polyglot tool to be installed first

ChessDB is a free open-source chess database for Windows, Linux, Mac OSX and most UNIX and UNIX-like operating systems. ChessDB is based on code from Scid http://scid.sourceforge.net/ - a project for which there have been no updates for several years. In

This project is a POSIX-compliant driver for the dgt board from dgtprojects. It is intented at acting as a layer between chess engines and the dgt board.

Popeye is a chess problem solving and testing software with strong support for fairy chess and heterodox genres. For more information cf. topic "Popeye (chess)" on http://en.wikipedia.org/

Faile is a free chess program which plays a fairly strong game of chess (Expert strength or better). One of the main goals of Faile is to provide a full featured chess program with source code which is tidy, well documented, and easy to understand.

Winboard 4.5 32-bit is a free Windows accessible Chess program that works automatically with the JAWS or the free NVDA screen reader. It is for the blind, low sighted or those who can not use a mouse. It provides vocal announcements of position changes and other selectable board conditions. Blind players also use a separate "tactile chess board". Winboard 4.5 has full keyboard access to move pieces and run menu items. Partial sighted players use high contrast mode and adjust board, piece, most font sizes and colors. Available languages are English, German, Spanish, Italian, Dutch and Russian. Games may be viewed, modified or saved in standard PGN format. Two Chess engines supply play and grand master strength move analysis. Connect to the Free Internet Chess Server (FICS) and play humans. Modify verbosity in screen reader configurations and in the Winboard "Sound" dialog under the "General" menu. Find all documentation in the "doc" folder under the Winboard directory of your C drive.

An open source chess engine in C, released under the GPL. Compatible with the XBoard and UCI interface protocols to link to a GUI or other chess arbiter.

XBoard compatible chess engine for Linux

Chess program, plays quite interesting, installer for windows, works in Linux under xboard, source code in pure C

IMPORTANT: I renamed the project to cengix (chess engine no. x). See http://code.google.com/p/cengix. IMPORTANT: yacen is not in any way related to the YACE chess engine. The similar name was a mistake. To avoid confusion, I will rename my project soon and provide a link to the new site then. yacen is a simple chess engine with main focus on understandability of code and mechanisms rather than on pure performance. It is completely written in ANSI-C using nothing more than the standard library and thus is very portable and easy to compile on almost every platform. yacen uses the common UCI interface to communicate with any compatible GUI. NOTE: yacen is currently in pre-alpha status. This means that there is only source code available which is far from complete and thus cannot be compiled to a working binary yet. A more complete source code and first binaries for Linux and Windows will be available when the project reaches alpha status.

OpenChess is a Chess game, Opening Trainer and Chess data base for the PalmOS platform. It supports Palm devices with OS 3.0 and above and uses separate layouts for Grayscale, Color and HiRes (OS5 and Sony Clié OS4) devices.

Gambit is a cross-platform chess game. There are binaries for Windows users. Users of Unix-like operating systems can check the web site for build instructions (it should be easy to follow).

Thief is a free chess client to play on chess servers like FICS: http://www.uschessnetwork.com It supports regular chess and all variants played. It is the best client for playing Bughouse, a special team-chess game

Witz is a chess program that is designed to work with a Winboard interface.

SAN Kit was made public in 1993 by Stephen Edwards, the inventor of PGN Chess notation. The original code is in C, and with few comments quite cryptic. In addition, the original author's style was quite quixotic, making it even more difficult to read. This code is now reformatted to modern standards, adds support for NAG codes and comments, and has a "non-CLI" mode for inclusion in chess playing programs. The code has gone through extensive analysis using the llvm/clang compiler and reports no issues at this time. To use the code as a "framework" you would undefined "CLI". In addition, a small C++ program is included that takes as input a file of one or more PGN records, and outputs pure pristine PGN records as output. In addition to flagging errors at the move level, the program provides three boards around the move. NOTE: plan on budgeting a fair amount of time to read, re-read, and experiment with the documentation and cryptic uncommented code. You are on your own

Thief is a free chess client to play on chess servers like FICS: http://www.freechess.org It supports regular chess and all variants played. It is the best client for playing Bughouse, a special team-chess game (for more info see http://www.bughouse.

Mancala is a GPL'd, ANSI C-based implementation of the ancient African game of Mancala (also called Awari), an abstract mathematical game in the same manner as chess. The program is available in graphical and text versions.

Neophyte is a Winboard and UCI compatible chess engine designed to play with a human style. Strong play comes second to the goal of playing like a human.

SOSS - a chess pairing program. Features: enter result using bar codes, lots of configurable print outs, calculation of team competitions, administration of fees etc, adm. of leaders, multiple competitions in one event, html print outs.

Small potato is a IETF protocol version 2 compliant chess engine, to be used with XBoard/WinBoard style interfaces.