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

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  • 1
    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: 137 This Week
    Last Update:
    See Project
  • 2
    Chess engine code name "Gull"
    Downloads: 17 This Week
    Last Update:
    See Project
  • 3
    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: 10 This Week
    Last Update:
    See Project
  • 4
    yet another UCI chess engine
    Downloads: 9 This Week
    Last Update:
    See Project
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  • 5
    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:
    See Project
  • 6
    Mediocre is a Java-based chess engine, implementing features like LMR, SEE, history and killer moves heuristics, transposition tables, internal iterative deepening, PVS search etc.
    Leader badge
    Downloads: 7 This Week
    Last Update:
    See Project
  • 7
    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: 9 This Week
    Last Update:
    See Project
  • 8
    Phalanx is a chess engine which understands the xboard protocol. It's suitable for beginner and intermediate players (I'm counting on your help to make it suitable for strong players!)
    Leader badge
    Downloads: 12 This Week
    Last Update:
    See Project
  • 9
    Chess-gambiteer

    Chess-gambiteer

    Chess training program playing gambits

    Program to train against gambit play (*) with the computer, with a strength adjustable chess engine (Danasah, currently set at approx 1400 EL0 when playing against it). Also included now are two options to watch an engine e.g. the 'aggressive' Patricia5 (with gambits) play against another engine (eg IM level). The engine gambit books are made in such a way that 1) real lousy gambits are not played, and 2) the book is choosing a gambit line as often as possible, so for Black it might go for e.g. a Benko gambit or so and if you let it play with White, a lot of 1.e4 gambits can be played. Thereby, if you try a gambit yourself, the program might try to a counter-gambit (or sometimes an unconventional line). It will play weak against other engines, and it not meant as to play very strong/perfectly, but for human opponents, the gambit lines will most often result in entertaining -not boring- games, and require quite some concentration to avoid tactical mistakes.
    Downloads: 6 This Week
    Last Update:
    See Project
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  • 10
    BagaturChess

    BagaturChess

    Java Chess Engine

    This is UCI Chess Engine writen in Java. Since version 1.4 (inclusive) the project was moved to https://github.com/bagaturchess/Bagatur
    Downloads: 5 This Week
    Last Update:
    See Project
  • 11

    GreKo

    Chess engine

    Winboard/UCI chess engine
    Downloads: 4 This Week
    Last Update:
    See Project
  • 12
    Redqueen Chess Engine
    Redqueen is an UCI (Universal Chess Interface) only compatible chess engine written in C++.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 13

    NetChess

    NetChess to play between two players over net or internet

    NetChess is a Graphical User Interface (GUI) for playing chess game. This software can be used To play chess between two players over network using TCP/IP (LAN) or in internet/intranet (Network vs Network) To send instant message (chat) while playing chess To observe the chess game played between two players over network To play chess between two players on the same board As PGN, FEN, EPD converter. This can be used To convert PGN to FEN or EPD format To convert FEG to PGN or EPD format To convert EPD to PGN or FEN format As PGN, FEN or EPD gave viewer. Load multiple games. This can also be used to load the games and analyze using chess engines To play chess using chess engines (Supports engines with WinBoard 1, 2 and UCI 1, 2 protocols) Human vs Chess Engine with White side Human vs Chess Engine with Black side Chess Engine with White side vs Chess Engine with Black side on the same board Chess Engine with White side vs Chess Engine
    Downloads: 7 This Week
    Last Update:
    See Project
  • 14

    Cave Chess

    A Java chess engine using xboard protocol

    Downloads: 2 This Week
    Last Update:
    See Project
  • 15
    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.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 16

    ChessbrainVB

    EXCEL VBA chess engine with chess board

    VBA chess engine for EXCEL / WORD / POWERPOINT ( level: 2200 ELO ) with chess board GUI. Full EXCEL install needed (no viewers or OpenOffice) also: VisualBasic 6 compile for winboard (2750 ELO), needs a chess GUI like ARENA latest version here: https://github.com/RZulu54/ChessBrainVB/releases
    Downloads: 3 This Week
    Last Update:
    See Project
  • 17

    rodent chess

    UCI chess engine

    Rodent is an UCI chess engine based on Sungorus by Pablo Vazquez, 300 Elo stronger than its predecessor. It allows setting up different personalities and to adjust playing strength.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 18
    Fen2Pdf

    Fen2Pdf

    Tool for chess teachers to create PDF files with chess diagrams in it

    Tool for chess teachers to create PDF files with chess diagrams in it. 1) Create a pgn file with chess diagrams (FEN notation) in it (e.g by using lichess) 2) Open the Fen2Pdf and select the folder containing the pgn(s) 3) Click start. Fen2Pdf detects the pgn files in it and creates a pdf file You can now print this file and hand the exercises over to your students Extra features: * Mirror the positions. This is handy if you want the same problems presented for the other color for educational purposes. You could present the same set of exercises in 2 different ways! * You can toggle the display of page numbers * The selected pgn folder is saved for next time * The title on the pages is the name of the pgn (without .pgn)
    Downloads: 2 This Week
    Last Update:
    See Project
  • 19
    Super Micro Chess

    Super Micro Chess

    The world's smallest chess playing program just got smaller!

    Super Micro chess engines are a series of world record small source and executables programs able to play the famous "King's Game" (both with simplified and full FIDE support)! Please refer to the official home page for more details: http://smmax.sf.net.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 20
    Chess Engine
    Provides interface for working with chess games in PGN (use libpgn) make moves, and get result
    Downloads: 1 This Week
    Last Update:
    See Project
  • 21
    Chess Tools for Windows

    Chess Tools for Windows

    Batch tools for creating Polyglot books and PGN-based statistics.

    Open source scripts and tools for Windows. Every zip archive contains a readme file with further information. PGNStat and PGNXtract are batch processing tools for Windows. Simply unpack the zip archive into a directory of your choice. The batch files require free and open source third-party tools. These are not included in the zip archives and must be downloaded separately. An alternative download link, where all third-party tools are already integrated, can be found in the readme files.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 22
    AmySharp is the C# version (stripped down) of the Amy Chess Engine hosted at https://sourceforge.net/projects/amy2/ originally developed by Thorsten Greiner.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23

    ArbyChess

    ArbyChess is a chess engine that allows arbitrary boards and pieces.

    ArbyChess gets its name from a shortening of "arbitrary chess", and as such is designed to allow arbitrary boards, pieces, and moves.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    A CECP (glChess-, xboard-, ...- compatible) chess engine specially conceived as a study application of Belief-Desire-Intention AI Architectures.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    This is an easy to use chess engine written in C++ with a very simple interface
    Downloads: 0 This Week
    Last Update:
    See Project
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