Open Source BSD Chess Engines

jose is a graphical Chess tool. >>> moved to https://peteschaefer.github.io/jose <<< You can store chess games in a database. You can view and edit games (including variations and comments). You can play against a plugged-in chess engine and use it for analysis. Features 3D board view.

Frittle is an open source amateur Java Chess Engine that supports the XBoard/WinBoard Chess Engine Communication Protocol (version 2).

Redqueen is an UCI (Universal Chess Interface) only compatible chess engine written in C++.

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

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.

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

Braincrack is a chess engine I wrote in my high school time. It is capable of being used with the Winboard protocol and via Winboard->UCI conversion tools within professional chess GUIs like Chessbase.

This library is an attempt to create a flexible chess engine using the Java programing language. The main diference than others chess engine's is that it is only a library, and it can be attached to any program, including a web application. If you are interested to contribute please contact me. Francisco Rafael Del Roio <francipvb@hotmail.com>.

MinkoChess is a multiplatform chess engine written in C++.

This is UCI Chess Engine writen in Java. Since version 1.4 (inclusive) the project was moved to https://github.com/bagaturchess/Bagatur

A CECP (glChess-, xboard-, ...- compatible) chess engine specially conceived as a study application of Belief-Desire-Intention AI Architectures.

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.

Chess Editor is a pure Java tool to create, edit and view chess games in the Portable Game Notation (PGN) format. The tool integrates with externally specified chess engine programs to provide analysis of board positions.

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

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.

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.

Brainless is a winboard/xboard chess engine developed in C++.

This is an easy to use chess engine written in C++ with a very simple interface

Cassandre is an extensible chess engine written in C++, it is Winboard/XBoard compliant.

Chesley is a free software chess engine written in C++ targeting Windows and Unix-like platforms and the xboard GUI. Chesley implements a number of modern chess programming techniques, including bitboard move generation, transposition tables, etc.

Provides interface for working with chess games in PGN (use libpgn) make moves, and get result

An easy to understand chess engine.

A chess application in order to play against computer or to play with another human. No network playing is planned (no FICS). This program uses the Carballo Chess Engine in order to check moves, and the Stockfish engine (that you must download on their website) in order to generate the computer moves.