XBoard is a

graphical user interface A graphical user interface, or GUI, is a form of user interface that allows user (computing), users to human–computer interaction, interact with electronic devices through Graphics, graphical icon (computing), icons and visual indicators such ...

chessboard A chessboard is a game board used to play chess. It consists of 64 squares, 8 rows by 8 columns, on which the chess pieces are placed. It is square in shape and uses two colours of squares, one light and one dark, in a chequered pattern. During p ...

for

chess engine In computer chess, a chess engine is a computer program that analyzes chess or List of chess variants, chess variant positions, and generates a move or list of moves that it regards as strongest. A chess software engine, engine is usually a Front ...

s under the

X Window System The X Window System (X11, or simply X) is a windowing system for bitmap displays, common on Unix-like operating systems. X originated as part of Project Athena at Massachusetts Institute of Technology (MIT) in 1984. The X protocol has been at ...

. It is developed and maintained as

free software Free software, libre software, libreware sometimes known as freedom-respecting software is computer software distributed open-source license, under terms that allow users to run the software for any purpose as well as to study, change, distribut ...

by the

GNU project The GNU Project ( ) is a free software, mass collaboration project announced by Richard Stallman on September 27, 1983. Its goal is to give computer users freedom and control in their use of their computers and Computer hardware, computing dev ...

. WinBoard is a port of XBoard to run natively on

Microsoft Windows Windows is a Product lining, product line of Proprietary software, proprietary graphical user interface, graphical operating systems developed and marketed by Microsoft. It is grouped into families and subfamilies that cater to particular sec ...

Overview

Originally developed by Tim Mann as a front end for the

GNU Chess GNU Chess is a free software chess engine and command-line interface chessboard. The goal of GNU Chess is to serve as a basis for research, and as such it has been used in numerous contexts. GNU Chess is free software, licensed under the terms ...

engine An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy. Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power ge ...

, XBoard eventually came to be described as a

for XBoard engines. It also acts as a client for

Internet Chess Server The American Internet Chess Server, commonly known as Internet Chess Server (ICS) was a telnet-based chess server which allowed users to play live chess over the internet. History In the 1970s, one could play correspondence chess in a PLAT ...

s, and e-mail chess, and can allow the user to play through saved games. XBoard/WinBoard remain updated, and the Chess Engine Communication Protocol has been extended to meet the needs of modern engines (which have features such as hash tables, multi-processing and end-game tables, which could not be controlled through the old protocol). XBoard/WinBoard also fully support engines that play

chess variants A chess variant is a game related to, derived from, or inspired by chess. Such variants can differ from chess in many different ways. "International" or "Western" chess itself is one of a family of games which have related origins and could be co ...

, such as

Fairy-Max XBoard is a graphical user interface chessboard for chess engines under the X Window System. It is developed and maintained as free software by the GNU project. WinBoard is a port of XBoard to run natively on Microsoft Windows. Overview Original ...

. This means the GUI is able to display a wide range of variants such as

xiangqi Xiangqi (; ), commonly known as Chinese chess or elephant chess, is a Strategy game, strategy board game for two players. It is the most popular board game in China. Xiangqi is in the same family of games as shogi, janggi, chess, Western ches ...

(Chinese chess),

shogi , also known as Japanese chess, is a Strategy game, strategy board game for two players. It is one of the most popular board games in Japan and is in the same family of games as chess, Western chess, chaturanga, xiangqi, Indian chess, and janggi. ...

(Japanese chess),

makruk Makruk (; ; ), or Thai chess (; ; ), is a Strategy game, strategy board game that is descended from the 6th-century Indian game of chaturanga or a close relative thereof, and is therefore related to chess. It is part of the family of chess varian ...

(Thai chess),

Crazyhouse Crazyhouse is a chess variant in which captured enemy pieces can be reintroduced, or ''dropped'', into the game as one's own. It was derived as a two-player, single-board variant of bughouse chess. Its drop rule is reminiscent of shogi and the ga ...

, Capablanca Chess and many other Western variants on boards of various sizes. It offers a Westernized representation for these games, but the almost limitless configurability of XBoard/WinBoard also allows a high-quality representation of non-Western style games. Xboard shogi

Another computer chess protocol is the

Universal Chess Interface The Universal Chess Interface (UCI) is an open communication protocol that enables chess engines to communicate with user interfaces. History In November 2000, the UCI protocol was released. Designed by Rudolf Huber and Stefan Meyer-Kahlen, the ...

(UCI). XBoard/WinBoard supports this protocol (and its dialects USI and UCCI, which are in common use for shogi and Chinese chess) through adapter programs such as Polyglot and UCI2WB. Since 2014 there exists a special version of XBoard that better integrates with Apple's

OS X macOS, previously OS X and originally Mac OS X, is a Unix, Unix-based operating system developed and marketed by Apple Inc., Apple since 2001. It is the current operating system for Apple's Mac (computer), Mac computers. With ...

. It is distributed from WinBoard forum as an OS X App, including several engines (for

chess Chess is a board game for two players. It is an abstract strategy game that involves Perfect information, no hidden information and no elements of game of chance, chance. It is played on a square chessboard, board consisting of 64 squares arran ...

and many chess variants), and adapters for running engines in non-natively supported protocols. It also contains supporting software for connecting with the popular Internet Chess Servers FICS and ICC for on-line play. XBoard OS X Apps that specifically configure XBoard for oriental-style shogi or xiangqi are also available. WinBoard is a version of XBoard adapted to MS Windows, and is available in a similar package.

Fairy-Max

Fairy-Max is a free and open source

which can play orthodox

as well as

chess variant A chess variant is a game related to, derived from, or inspired by chess. Such variants can differ from chess in many different ways. "International" or "Western" chess itself is one of a family of games which have related origins and could be co ...

s. Among its features is the ability of users to define and use their own custom variant chess pieces for use in games. Fairy-Max was derived from micro-Max (also developed by H.G. Muller), one of the smallest programs to play complete FIDE chess. Therefore, Fairy-Max versioning started with version number 4.8, the version of micro-Max used.

Description

The Fairy-Max module is a chess engine only, but is packaged with XBoard, which serves as the graphical user interface. Users can play against the Fairy-Max engine, or play the engine against other engines. It can also be set up to play two armies against each other, both using the Fairy-Max engine, for the purpose of analyzing chess moves, chess variants, or variant chess pieces. Fairy_Max_output

Capabilities

Besides classical FIDE

, Fairy-Max is provided with a large selection of pre-defined games using

fairy chess piece A fairy chess piece, variant chess piece, unorthodox chess piece, or heterodox chess piece is a chess piece not used in conventional chess but incorporated into certain chess variants and some unorthodox chess problems, known as fairy chess. Compar ...

s, including

shatranj Shatranj (, ; from Middle Persian ) is an old form of chess, as played in the Sasanian Empire. Its origins lie in the South Asian game of chaturanga. Modern chess gradually developed from this game, as it was introduced to Europe by contacts in ...

(ancient Iranian chess),

(Chinese chess),

(Japanese chess),

(Thai chess),

King of the Hill ''King of the Hill'' is an American animated sitcom created by Mike Judge and Greg Daniels that initially aired on Fox Broadcasting Company, Fox from January 12, 1997, to September 13, 2009, with four more episodes airing in First-run syndicati ...

, Capablanca Chess, Courier chess, Berolina chess, Seirawan chess and other chess variants. Users are also able to specify their own board sizes, and define custom chess pieces, so that user-defined chess variants can also be played. Chessboards can be defined with a maximum size of 14 files in width, and 16 ranks in depth.

Playing strength

The engine's Elo rating fluctuates at around 1900 when playing orthodox chess in CCRL 40/40 chess engine tournament, which roughly corresponds to class A human player. The author of the program has said "the goal of Fairy-Max is to make an entertaining but beatable opponent to play against in all kind of chess variants."

References

External links

*
XBoard
on

GNU Savannah GNU Savannah is a project of the Free Software Foundation initiated by Loïc Dachary, which serves as a collaborative software development management system for free software projects. Savannah currently offers CVS, GNU arch, Subversion, Git, Me ...

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