Browse free open source Chess Games and projects 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

    Gui of chess

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    Downloads: 1,670 This Week
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  • 2
    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: 787 This Week
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  • 3
    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: 711 This Week
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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: 500 This Week
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  • 5
    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: 52 This Week
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  • 6
    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: 49 This Week
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  • 7
    Chess Engines for Android (APKs)

    Chess Engines for Android (APKs)

    Chess engines in APK format that provide the OEX format.

    Installation files for chess engines that provide the Open Exchange (OEX) format (links to the source code of the built-in chess engines can be found in the corresponding zip archives). The APK files "Chess Engines" and "Chess Engines Bonus" contains almost all UCI compliant chess engines that are already published here. The APK file "Chess Engines Bonus" contains chess engines without embedded networks. Chess engines in this package are not ready to use. The missing network files can be found in the assets directory (just rename .apk to .zip). The APK file "XBoard Chess Engines" contains chess engines that support the Chess Engine Communication Protocol (WinBoard and XBoard). Requires a chess app that supports the OEX format (e.g. Chess for Android or DroidFish).
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    Downloads: 413 This Week
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  • 8
    Chess Engines for Android

    Chess Engines for Android

    Chess engines that support the UCI or XBoard protocol.

    Open source chess engines that support the Universal Chess Interface (UCI) protocol or Chess Engine Communication Protocol (WinBoard and XBoard). They are written in the C, C++, Go and Rust programming language. C and C++ based chess engines were generated with Android NDK, Clang and GCC. Go and Rust based chess engines were generated with their correspondent compilers. This was done on different platforms like Linux, Termux and Windows. Every zip archive contains a readme file with further information (e. g. link to the source code). Chess engines are located in the libs directory and are available for arm64-v8.2a-dotprod, arm64-v8a, armeabi-v7a, x86 and x86_64 based devices. If a chess engine supports NNUE (Neural Network Updated Efficiently) technology and the network is not embedded in the binary, you will find the missing network file in the networks directory. Requires a chess app that has full access to the internal memory (e.g. Chess for Android 6.2.1 or DroidFish).
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    Downloads: 402 This Week
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  • 9
    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: 15 This Week
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  • 10
    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. Web Site : https://mindrose.com.au Source Code: https://github.com/czbar/ChessForge Installation info: https://github.com/czbar/ChessForge/wiki/Installation Contact: https://mindrose.com.au/feedback.html New in v.1.10 (October 2024): https://github.com/czbar/ChessForge/wiki/Release-History
    Downloads: 98 This Week
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  • 11

    LumbrasGigaBase

    Free, large chess game collection in a database for Scid

    Downloads: 253 This Week
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  • 12
    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.
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    Downloads: 48 This Week
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  • 13
    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: 67 This Week
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  • 14
    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: 96 This Week
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  • 15
    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: 29 This Week
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  • 16
    jose is a graphical Chess tool. 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: 60 This Week
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  • 17
    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: 19 This Week
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  • 18
    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: 91 This Week
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  • 19
    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/
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    Downloads: 21 This Week
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  • 20
    pgn4web

    pgn4web

    javascript chess games viewer for websites, blogs and live broadcasts

    pgn4web is a javascript chess games viewer for websites, blogs and live broadcasts. "pgn4web has a clean design, and is easily integrated and configured in wordpress. And yet, below that layer of simplicity, it has enough bells and whistles to allow for more baroque needs and taste. A truly great plugin." GM Tiger Hillarp, using the pgn4web plugin for wordpress on his site chess at the bag of cats, May 2013. "We wanted a live viewer that could work on tablets and mobile phones. pgn4web did fit very well on every platform, is stable and matched our visual design. Also the horizontal view for the commentators and the vertical view for smartphones was a real plus." H.S. from the Max Euwe memorial tournament committee, using pgn4web for live broadcast and game reports, November 2011.
    Downloads: 18 This Week
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  • 21
    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
    Downloads: 42 This Week
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  • 22
    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
    Downloads: 42 This Week
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  • 23
    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.
    Downloads: 14 This Week
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  • 24
    Chess engine code name "Gull"
    Downloads: 13 This Week
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  • 25
    EBoard is a user-friendly chess interface for ICS (Internet Chess Servers). While it will focus on FICS (www.freechess.org), should work with any other ICS. It supports playing against local chess engines too.
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    Downloads: 35 This Week
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Open Source Chess Games Guide

Open source chess games are video games that feature the classic strategic board game, Chess. These virtual versions of the popular two-player competitive strategy game have been available for a long time, but recently the development of open source software has made these digital versions even more accessible and varied. Open source means that the code behind the game is free to be modified or redistributed by anyone who wants to create their own version of it. This means that players can take the existing code (or “source”) and tweak it as they wish so that they can customize their gaming experience however they like—all without having to pay a single cent.

The great thing about open source chess games is that developers will often openly share changes and updates to their respective projects which allow gamers a unique opportunity for hands-on collaboration in developing better algorithms, new features, fixes for bugs and much more. For example, some may post code on forums or websites devoted to improving open source chess programs so others can take advantage of these improvements; this type of user feedback helps keep these programs up-to-date and provides an invaluable resource when playing against friends or opponents online.

In addition to providing many customization options, another great asset provided by open source chess games is that there are no licensing fees involved with downloading them—making them extremely cost effective as well as convenient. As a result, more players are able to access top quality gaming experiences without having to break into their bank accounts. Furthermore, since users need only purchase hardware such as computers or gaming consoles in order to play online (unless you're playing on your mobile device), costs become significantly lower over buying physical copies of video games at retail stores with limited selections anyway.

Overall, open source chess games offer something special: an easy way for people from all around the world–from casual gamers up through professional competitors–to come together in friendly competition no matter where they live. Whether you’re downloading them from sites like GitHub or playing against other people across different continents via specialized sites like Chesscube or Lichess, open source projects have made it easier than ever before to sharpen your skills while having fun doing it.

Features Provided by Open Source Chess Games

  • Ability to Play Against the Computer: Many open source chess games allow players to face off against the computer. This can be a great way for beginners to learn how to play, as well as hone their skills.
  • Online Multiplayer: Open source chess games also offer online multiplayer so that players from all over the world can connect and play each other. This is a great way to challenge yourself against strong opponents or just enjoy some friendly competition.
  • Customization Options: One of the great features of open source chess games is their customization options. Players have complete control over board size, pieces and board designs, allowing you to create your own unique look and feel for your game.
  • Game Analysis Tools: Some open source chess games offer powerful analysis tools such as move trees and performance graphs which allow you to review past moves or analyze critical positions in greater detail. These tools can help provide insight into your mistakes and areas where improvement could be made.
  • Downloadable Tournaments & Engines: Open Source Chess Games often include downloadable tournaments or engines which you can use for analyzing matches or challenging yourself against tougher virtual opponents.

Different Types of Open Source Chess Games

  • Open Source Chess Engines: These are the actual software processes which analyze and play chess, although they may not have a graphical user interface. They may be used in conjunction with another program to provide visual guidance and track game progress.
  • Graphical User Interface (GUI): A graphical user interface allows for a more enjoyable experience, allowing users to visually see changes made within the game board during play. The GUI can often connect with an open source engine via API or another protocol to provide further functionality.
  • Networked Play: An open source player can create a networked environment for playing against other computer players or even remote human opponents over the Internet. Often these programs use TCP/IP connections and strong encryption protocols such as SSL/TLS for secure communication between participants in order to prevent cheating.
  • Artificial Intelligence (AI): AI is integrated into many open source chess games, enabling them to learn from past experiences and improve their theoretical understanding of the game through analysis of positions on the board over time. This gives some players an additional challenge when playing against computers, making it feel much closer to playing against a human opponent than ever before.
  • Cross-Platform Support: Many open source chess programs work across multiple operating systems including Windows, Mac OSX, Linux and iOS devices so that users on different platforms can still enjoy playing against each other with relative ease.

Advantages of Using Open Source Chess Games

  1. Accessibility: Open source chess games are accessible to everyone, as the code is openly available for anyone to use and modify. This means that people from all levels of skill, experience and economic background can enjoy the game without having to pay an expensive price tag.
  2. Improves Play: As open source chess games are constantly being modified and improved by developers, this allows players to take advantage of new features or strategies that have been coded into the game in order to improve their play.
  3. Innovation: The development process of open source chess games encourages developers to think outside the box and create something different rather than simply copying existing designs or ideas. This can lead to innovative new gameplay elements and strategies which raise the level of interest in the game.
  4. Community: Open source chess games often foster a strong community among players due to their collaborative nature. Players from around the world come together on forums or chats discussing strategy and tactics, helping each other out with any issues they may encounter while playing, creating a sense of camaraderie even when no one is actually playing a game at any given time.
  5. Cost-Effective: Since open source software does not require you to purchase a license or subscription fee in order to play, it makes it much more cost effective for those who may not have access (or simply do not want) larger commercialized titles that require these kinds of fees for full access.

Types of Users That Use Open Source Chess Games

  • Casual User: These users enjoy playing chess for fun, either on their own or with friends. They may not have any competitive ambitions and may just play for the casual entertainment of it.
  • Beginner Player: This type of user is just starting out in the world of chess, often using open source programs to get familiar with the rules and how to play.
  • Intermediate Player: Players that fall into this category have gained a moderate amount of knowledge and experience when playing chess. They use open source programs as a way to continue honing their skills against more advanced opponents as they progress further in their game-playing journey.
  • Advanced Player: Advanced players will use open source games with the aim of sharpening their strategies and improving their skills even further, utilising all available resources such as databases and other tools.
  • Professional Chess Players: Many professional chess players rely on open source software to practice for tournaments or gain insight from other professional players around the world via online forums.
  • Educators: Educators often use open source software as an innovative way to teach chess strategies in classrooms or after-school activities for students of various ages.
  • Software Engineers & Developers: Open source software also attracts creative minds who can modify existing games or create entirely new ones from scratch, allowing others access to them through sites like GitHub.

How Much Do Open Source Chess Games Cost?

Open source chess games typically cost nothing to play. Many developers create open source chess games in order to share their love of the game with the world, so they don't charge a fee. Instead, those who wish to enjoy these games can download them for free. Some developers may even provide their code online, so that players can customize the game to their liking without needing any coding knowledge. Of course, if you're looking for more advanced features or a larger selection of opponents and tournaments, you may have to pay a small fee for some of the more popular options out there. However, many people find that spending even a few dollars on an open source chess game is still much cheaper than buying into traditional commercial versions.

What Do Open Source Chess Games Integrate With?

Many types of software can integrate with open source chess games. These include computer-assisted instruction programs, user interfaces for remote play with other users, game analysis tools that help players identify mistakes and analyze strategies, and databases of past game moves for reference. Some software packages also provide cloud storage for saving and sharing chess games online. AI opponents are also possible since many open source chess programs incorporate artificial intelligence to challenge human players. Finally, there may be special applications tailored to meet the needs of advanced or beginner players such as those who need help learning the rules and strategies of the game.

What Are the Trends Relating to Open Source Chess Games?

  1. Increased Popularity: Open source chess games have grown in popularity in recent years, due to the wide range of options available and the flexibility that comes with them. Players can choose from different themes, levels of difficulty, and even online play. This has led to an increase in players overall, as well as a thriving competitive scene.
  2. More Complex Games: Open source chess games are becoming increasingly complex, allowing for more strategy and depth than ever before. Developers are consistently adding new features and game types, making it easier for players to enjoy a deeper level of play.
  3. Improved Technology: The technology behind open source chess games is constantly evolving. This has led to faster load times, improved graphics, and more realistic gameplay. Players can now enjoy a highly immersive experience no matter what platform they’re playing on.
  4. Easier Accessibility: Open source chess games are also becoming more accessible in terms of cost and availability. Many are now available for free or at a low cost, allowing anyone with a computer or smartphone to access them. Additionally, some developers are creating versions specifically designed for mobile devices.
  5. Increased Competition: With the growing popularity of open source chess games, there is an increased level of competition between players. This has led to an increase in tournaments as well as new strategies being developed and shared among the community.

Getting Started With Open Source Chess Games

First, you’ll need to find an open source chess game that is compatible with your computer or device. Many open source chess programs are available online, through either dedicated websites or app stores for popular platforms like iOS, Android, and Windows 10. Once you have downloaded the program, it’s time to get playing. Most open source chess games come with tutorials and hints on how to play the game; take advantage of these if you’re unfamiliar with the rules or strategies used in chess. If possible, look up tutorials and videos online as there are plenty of sources that provide detailed explanations of each move in the game.

When you start a new game against an AI opponent, make sure to set it at a level appropriate for your ability so it will still be a challenge but also not too difficult for you handle. Open source programs offer varying levels difficulty which range from beginner to grandmaster strength allowing players of all skill levels to improve their skills while having fun playing along the way. You can also explore options such as handicaps and time controls enabling you to customize your gaming experience even further. Take some time to experiment with different settings before committing yourself into serious practice sessions against higher-level opponents.

New players should use this opportunity not only for learning but also for developing problem solving skills since most moves during a match have multiple solutions requiring careful evaluation before being decided upon by both sides involved in the match-up depending on their particular strategies and specific positions within in each match itself . Finally, once comfortable enough with your own play - don't forget about participating in online tournaments where competitive matches can be engaged between people around the world.