Browse free open source Chess Games and projects for Windows below. Use the toggles on the left to filter open source Chess Games by OS, license, language, programming language, and project status.

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  • 1
    LucasChessR

    LucasChessR

    GUI of chess

    Lucas Chess (R) is a free, open-source chess program designed primarily for training and improving chess skills. It acts as a comprehensive learning platform, offering tools for beginners and advanced players alike. The software includes a wide range of exercises covering openings, tactics, endgames, and visualization techniques. Users can play against multiple chess engines with adjustable difficulty levels that simulate different strengths. It also provides detailed game analysis, helping players understand mistakes and improve decision-making. Overall, Lucas Chess (R) combines gameplay, training, and analysis into a single powerful chess improvement suite.
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    Downloads: 2,898 This Week
    Last Update:
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  • 2
    Scid vs. PC

    Scid vs. PC

    Chess Database and Toolkit program

    "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.
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    Downloads: 574 This Week
    Last Update:
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  • 3
    Stockfish

    Stockfish

    UCI chess engine

    Stockfish is a free, powerful UCI chess engine derived from Glaurung 2.1. Stockfish is not a complete chess program and requires a UCI-compatible graphical user interface (GUI) (e.g. XBoard with PolyGlot, Scid, Cute Chess, eboard, Arena, Sigma Chess, Shredder, Chess Partner or Fritz) in order to be used comfortably. Read the documentation for your GUI of choice for information about how to use Stockfish with it. Stockfish is a 11-time winner of the Top Chess Engine Championship. Stockfish is open source (GPLv3 license). That means you can read the code, modify it, and contribute back. You can use Stockfish on your computer or on your iOS or Android device. So you can get world-class chess analysis, wherever you are. The Stockfish engine features two evaluation functions for chess, the classical evaluation based on handcrafted terms, and the NNUE evaluation based on efficiently updatable neural networks.
    Downloads: 107 This Week
    Last Update:
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  • 4
    ChessX

    ChessX

    Chess Database and PGN viewer

    A free and open source chess database application for Linux, Mac OS X and Windows.
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    Downloads: 429 This Week
    Last Update:
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  • 5
    Scid
    Scid is a chess database application (cross-platform, for Unix/Linux and Windows) with many search and database maintenance features.
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    Downloads: 382 This Week
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  • 6
    lichess.org

    lichess.org

    The forever free, ad-free and open source chess server

    lichess.org (also known as Lila - lichess in Scala) is a free and open source chess server written in Scala 2.13 that focuses on real time gameplay and ease of use. It’s where countless chess players and chess enthusiasts can gather and watch or play from a selection of over a million games every day, analyze games, learn and improve their playing. lichess is equipped with a search engine, computer analysis, tournaments, exhibitions, a mobile app, a shared analysis board, and so much more. Thanks to its large active community, the UI is available in more than 130 different languages. lichess is one of the most popular chess websites in the world and remains totally free and ad-free. Visit https://lichess.org today to know more and see what it’s about!
    Downloads: 38 This Week
    Last Update:
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  • 7
    AlphaZero.jl

    AlphaZero.jl

    A generic, simple and fast implementation of Deepmind's AlphaZero

    Beyond its much publicized success in attaining superhuman level at games such as Chess and Go, DeepMind's AlphaZero algorithm illustrates a more general methodology of combining learning and search to explore large combinatorial spaces effectively. We believe that this methodology can have exciting applications in many different research areas. Because AlphaZero is resource-hungry, successful open-source implementations (such as Leela Zero) are written in low-level languages (such as C++) and optimized for highly distributed computing environments. This makes them hardly accessible for students, researchers and hackers. Many simple Python implementations can be found on Github, but none of them is able to beat a reasonable baseline on games such as Othello or Connect Four. As an illustration, the benchmark in the README of the most popular of them only features a random baseline, along with a greedy baseline that does not appear to be significantly stronger.
    Downloads: 27 This Week
    Last Update:
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  • 8
    ChessForge

    ChessForge

    Chess analysis, training and testing for Windows.

    Chess Forge is a Free and Open Source Windows desktop application facilitating chess training. Use Chess Forge to build your opening repertoire, study endgames, strategy and tactics. Utilize the two distinct solving modes and also Chess Forge's unique Training Mode where you get tested against the workbook's content with the help of the engine. Note: the current version (1.14.3) addresses lichess's breaking change https://lichess.org/@/thibault/blog/the-opening-explorer-now-requires-authentication/FSWh9Zg3. ). Installation info: https://github.com/czbar/ChessForge/wiki/Installation PDF Manual: https://sourceforge.net/projects/chessforge/files/ChessForge_Manual.pdf/download (35MB due to numerous screenshots) Web Site : https://mindrose.com.au Contact: https://mindrose.com.au/feedback.html Source Code: https://github.com/czbar/ChessForge New in v.1.14.0-3 (February/March 2026): https://github.com/czbar/ChessForge/wiki/Release-History
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    Downloads: 123 This Week
    Last Update:
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  • 9
    Eagle Mode

    Eagle Mode

    Zoomable user interface (ZUI) with file manager, file viewers and more

    Eagle Mode is a zoomable user interface (ZUI) with file manager, file viewers, games, and more. This project is about a futuristic style of human-computer interaction, where the user can visit almost everything simply by zooming in. It features a portable C++ toolkit API for developing such ZUIs, and it features the Eagle Mode application, which provides a virtual cosmos with plugin applications. The most important one is the professional file manager with its rich, scriptable command set. It integrates file viewers for most of the common file types, as well as an audio and video player. Furthermore, the virtual cosmos contains a chess game, a netwalk game, a 3D minesweeper game, a multi-function clock, a stock watchlist, some fractals, and a Linux kernel configurator in form of a kernel patch.
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    Downloads: 50 This Week
    Last Update:
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  • 10
    Brutal Chess features full 3D graphics, an advanced particle engine, and several different levels of intelligent AI, inspired by the once popular "Battle Chess" released by Interplay circa 1988.
    Downloads: 56 This Week
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  • 11
    Jin is a Java client for various chess servers. It currently supports the Internet Chess Club (chessclub.com) and the Free Internet Chess Server (freechess.org) but is designed to be able to support any chess server.
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    Downloads: 29 This Week
    Last Update:
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  • 12
    15 Million Games Chess Database

    15 Million Games Chess Database

    World largest chess database

    Chess database with 15,9 Million games. Database is categorized into 6 parts, to learn which one you need please browse all files and read description. In addition a huge collection of opening books for chess engines and Arena. As well as other chess resources, to download separate packages please browse "all files"
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    Downloads: 43 This Week
    Last Update:
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  • 13
    Scidb

    Scidb

    Chess Database Application

    Scidb is an open-source chess database application for Windows, Unix/Linux. It is a new development inspired by Scid.
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    Downloads: 18 This Week
    Last Update:
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  • 14
    Crafty Chess Interface

    Crafty Chess Interface

    free open-source chess engine interface

    latest portable distribution: https://sourceforge.net/projects/craftychessinterface/files/crafty_gui_10.7z/download
    Downloads: 29 This Week
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  • 15
    XiangQi Wizard (Chinese Chess Wizard) is a powerful XiangQi (chinese chess) program, which supports UCCI engines. XQWizard Light is the Mobile version for Windows CE and Java ME. ElephantEye is the UCCI engine in XQWizard with strong AI.
    Downloads: 34 This Week
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  • 16
    JBoardGames
    Collections of simple Java Board Games No third party libraries. Now avaiable: - Chess 1.0.18 featuring Human vs Human Human vs Computer Computer vs Computer With puzzles. -Quattro 1.2.3 Currently available: Human vs Human Human vs Computer Computer vs Computer -Checkers 1.0.9 featuring Human vs Human Human vs Computer Computer vs Computer -Backgammon 1.0.2 featuring Human vs Human Human vs Computer Computer vs Computer - Go 1.0.1 Human vs Human Human vs Computer Computer vs Computer -Dominoes 1.0.1 featuring Human vs Human Human vs Computer Computer vs Computer - Mill 1.0.5 featuring Human vs Human Human vs Computer Computer vs Computer - Battleship 1.0.2 Human vs Computer
    Downloads: 56 This Week
    Last Update:
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  • 17
    GCompris : I got IT

    GCompris : I got IT

    Educational Software for children aged 2 to 10.

    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.
    Downloads: 10 This Week
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  • 18
    Chess engine code name "Gull"
    Downloads: 10 This Week
    Last Update:
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  • 19
    chessPDFBrowser

    chessPDFBrowser

    Chess application whichs allows working with chess PDF books and PGNs.

    Chess application which allows working with PDFs and PGNs. You can work with the chess games of the PDF and edit their tree of variants. Graphical environment. Standard PGN TAGs. PGN comments. Ocr like (Fen string detection from chess board position images). Connection to Uci chess engines (like stockfish). Position analysis, full game analysis. You can now play games against uci engines. pdf2pgn command line command included. Detailed documentation. Multilanguage currently support for English, Spanish and Catalan. Dark mode option. JDK-17 compatibility You will find more about it at this web sites: https://chesspdfbrowser.com?origin=sourceforge https://www.frojasg1.com:8443/downloads_web/web/html/chessPdfBrowser.html?origin=sourceforge
    Downloads: 28 This Week
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  • 20
    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.
    Downloads: 17 This Week
    Last Update:
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  • 21
    DreamChess

    DreamChess

    OpenGL chess game

    A portable chess game consisting of an xboard-compatible OpenGL user interface with 2D and 3D board views and a chess engine. The primary targets are Windows, Mac OS X and Linux.
    Downloads: 7 This Week
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  • 22
    yet another UCI chess engine
    Downloads: 7 This Week
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  • 23
    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/
    Downloads: 8 This Week
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  • 24
    WebChess
    A PHP Web Application that you can install on your own web server. It allows you to play chess with other users across the internet or sitting at the same screen. It only permits valid moves and can automatically detect check and checkmate status.
    Downloads: 6 This Week
    Last Update:
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  • 25
    Accessible-Coconut

    Accessible-Coconut

    A GNU/Linux operating system accessible for visually impaired.

    Accessible-Coconut(AC) is a community driven GNU/Linux operating system which is completely accessible for persons with visual impairment. AC is derived from Ubuntu-MATE. Yes the goal is to make a free and open-source eyes free desktop environment. Forum : https://groups.google.com/forum/#!forum/accessible-coconut Telegram forum : https://telegram.me/accessible_coconut Project home : https://zendalona.com/
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    Downloads: 29 This Week
    Last Update:
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