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.

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

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.

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/

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

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.

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).

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.

A console/text based chess program with XBoard/CECP and UCI API, available on all major platforms. You may need a graphical chess interface to use it. Please refer to README.md in the files section for installation instructions. The last stable release is 2.1.9 and has been released on 19/08/2025. Belofte 0.2.0 till 0.9.20 (c/c++): Xboard 1 & 2 (CECP) - Linux/Unix/(Windows) Belofte 2.1.1 and up (c++11) : UCI and Xboard 2 - Linux/Windows/Mac/Android/... For access to code, please clone the git repository. Compiles and Runs on 32/64 bit on Windows, Mac, Linux, Android (ARM/x86) and Raspberry. Released under GNU v2 license. (means free to copy, free to modify, free to use, ...) Works fine with Arena/Cutechess/BanksiaGui/Winboard/Xboard/...

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.

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

Шахматный движок и графическая оболочка под Windows 64 (запуск - start.cmd), под Linux запускать под xboard. Исходники на Си прилагаются. The chess engine and graphical shell run on Windows 64, and on Linux run on xboard. The C sources are attached.

Sjeng is a strong, GPL'ed chessprogram that plays bughouse and crazyhouse (drop-chess). It also supports standard chess and is compatible with any program supporting the XBoard/WinBoard protocol.

Joshua chess robot: a stepper motor robot interfaced with a photosensible board to play chess with an embedded artificial intelligence, a game database or and internet player. Software, robot photos, tech papers, schematics and cabling included. Enjo

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.

Sconvolt is a cross-platform chess program by Orest Sota, it is written in C++ with the allegro programming libraries 5, Works on Windows and Linux

TChess is an extended chess played on a Torus (donut) It includes a computer player (KI) with 3 strength levels and multiplayer support. -- Please post your questions in the Help-Forum!

Play chess via mail and web.

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

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.

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

CINAG is an UCI computer chess engine. This is a module which thinks about the game and try to find the best move for each position. Our goal is to create a quite strong opponent by using state of the art AI technics.

It is just a Chinese-Chess Game,using SDL Library. Its target is to be a full feature Chinese-Chess ,supporting Two player via internet ,One player vs computer with AI supported

OpenGL chess game. Project moved to SourceForge: http://sourceforge.net/projects/dreamchess/

FreeICS is a server which allows multiple users to play chess against each other. This project is stable and in production at a number of sites. There are several sub-projects which enhance the utility of the server, starting with a tournament manager.