Open Source Windows Chess Engines

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.

Chess engine code name "Gull"

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.

latest portable distribution: https://sourceforge.net/projects/craftychessinterface/files/crafty_gui_10.7z/download

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!)

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.

yet another UCI chess engine

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.

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

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.

icsdrone acts as an interface between an ICS (Internet Chess Server) and a chess engine supporting the XBoard/WinBoard protocol. Unlike XBoard/WinBoard it does not use a graphical interface so it is suitable for use on embedded systems. icsdrone was originally developed for FICS (the Free Internet Chess Server) by Henrik Gram but currently ICC (the Internet Chess Club) works as well. Some features - "Daemon mode" (run in background). - Auto reconnection in case of network problems. - Builtin support for using timeseal. - An ICS proxy. When instructed via the "proxy" option, icsdrone acts as a proxy for the ICS it is connected to. This is similar to using xboard with zippy but now the "GUI" (xboard/winboard) can be closed without terminating the engine.

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

Winboard/UCI chess engine

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

This tool allows several bot customizations: - Load all the chess engine settings - Change avatar for any bot - Analyse player's games to get: * Player max elo * Game style (aggressive, positional, etc.) * Preferred opennings - Choose the closest openning book for a player - Save openning book based on player's game stats - Automtically backup bot with with possibility to restore settings Future improvements: - Improve .pgn analysis using external engine or refined position evaluation - Allow to save in either CM10 (best compatibility) or CM11 (more features) - Add tools to create new lessons with audio support

Grapefruit is an opensource chess engine based on Toga II 1.4 beta5c.

A concise javascript chess engine, first written for the 5k web competition. It plays at the level of a lazy amateur, so is a good match for most opponents.

You are given a chess graphical interface, with drag and drop functionnalities (or other interaction mode), board flipping, and some pieces/cells sets given. Then, you have some callbacks methods in order to validate moves from your chess engine and to update them to your chess engine.

Engine from "MIGOYA-CHESS Developed by Alejandro Migoya" ported to excel vba. He says "is not really a strong chess engine...." Instead i think it is very good and I thank him.

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 the engine (with gambit book) play against another engine (either clublevel or 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.

An interface for javascript chess engines to the UCI (universal chess interface) protocol. This allows javascript chess engines to be launched in most chess guis. The progam is based on the Google V8 Javascript Engine. This program expects the path to the .js file of the engine in the first parameter. A wrapper for the open source Javascript Engine p4wn by Douglas Bagnall is provided as an example. A successful and very complete implementation is the Javascript Chess Engine Lozza by Colin Jenkins. The webpage also includes a simple step-by-step guide setting up jsuci with Lozza. http://op12no2.me/toys/lozza/ You may also want to try connecting this javascript translation of the chess engine Stockfish 5 to jsuci: https://github.com/exoticorn/stockfish-js

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

ValisoaChess is a chess game written in Freepascal. The main goal is to create a simple yet powerful chess engine.

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