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.

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

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/

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

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.

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.

Sour*eforge.net has become inaccesible to me because of Cl*udflare. The latest versions of the programs will be on my site: https://matei.one/. Simple chess game for people who want to play chess but don't want to take it seriously. Written in C, using SDL 1.2 or SDL 2 for graphics. Interface inspired from old chess game for ZX Spectrum. The computer searches (L+2)/2 moves ahead (assuming that a move means that both sides move a piece), where L is the difficulty level. Positions are evaluated only by adding the values of the pieces left on the board. Any factors related to where the pieces are, such as mobility, doubled pawns, isolated pawns etc. are not considered. To add variety to the game, possible moves are randomly shuffled before every search.

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.

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).

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 2.2.0 and has been released on 13/04/2026. 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/...

XBoard compatible chess engine for Linux

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.

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.

Cross-Platform 3D Chess A 3D chess game made using OpenGL and C++ Objectives: -High Quality Graphics -Proper Chess Rules -Availability of Unofficial Chess Rules -Reading Generic Chess Files -Proper A.I. for user vs. computer modes -Good GUI -Network Current Status: Chess rules exist

Not so strong UCI chess engine programmed for fun. - IID, negascout, QS, SEE - bitboards, magics - null move pruning - hash (QS too), pawn hash - killers, history - time management, singular reply in root - staged generation - soft control - fast mobility - (undone) learning

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.

Slibo is a chess interface and a chess engine for KDE.

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!

ABKit is a C++ library intended to accelerate board games development by providing the thinking engine under the Alpha-Beta algorithm. The application just need to create a few C++ methods to adapt to the actual game (like Chess, Checkers, ...).

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.

Play chess on popular Internet Chess Servers (ICS servers) with a Palm-OS-based PDA. This version builds on the original version 1.0 created and released by David Barr.

Given a placement of pieces on a chessboard, find the move which forces checkmate as rapidly as possible.