Editing XBoard (section)

==Fairy-Max==
{{Infobox software
| name = Fairy-Max
| screenshot = Fairy_Max_logo.png
| caption = '''Fairy-Max logo'''
| developer = H.G. Muller
| released = 4.8 / {{Start date and age|2007|10|18}}<ref name="cp"/>
| latest release version = 5.0b
| latest release date = {{Start date and age|2016|2|19}}<ref>Muller, H. G. (February 19, 2016). [http://www.talkchess.com/forum3/viewtopic.php?t=59309 Fairy-Max 5.0b released]. ''TalkChess.com''.</ref>
| programming language = [[C (programming language)|C]]
| operating_system = [[Microsoft Windows|Windows]], [[Linux]], [[MacOS]]<ref>Muller, H. G. (October 7, 2011). [http://www.talkchess.com/forum3/viewtopic.php?t=40667 Fairy-Max 4.8R released]. ''TalkChess.com''.</ref>
| genre = [[Computer chess]]
| license = [[Public Domain]]
| website = {{URL|http://home.hccnet.nl/h.g.muller/CVfairy.html}}
}}
'''Fairy-Max''' is a [[Free software|free]] and open source [[chess engine]] which can play orthodox [[chess]] as well as [[chess variant]]s.<ref name="cp">{{cite web|url=https://chessprogramming.wikispaces.com/Fairy-Max|title=chessprogramming - Fairy-Max|website=ChessProgramming.Wikispaces.com|access-date=3 September 2017|archive-date=4 May 2018|archive-url=https://web.archive.org/web/20180504050041/http://chessprogramming.wikispaces.com/Fairy-Max|url-status=dead}}</ref><ref name="fm1">{{cite web|url=http://home.hccnet.nl/h.g.muller/CVfairy.html|title=Fairy-Max|last=H.G.Muller|website=home.HCCNet.nl|access-date=3 September 2017}}</ref><ref>{{cite web|url=http://www.chessvariants.com/index/msdisplay.php?itemid=MSfairy-max-an-ai-for-playing-user-defined-chess-variants|title=Fairy-Max: an AI for playing user-defined Chess variants|first=H. G.|last=Muller|website=www.ChessVariants.com|access-date=3 September 2017}}</ref><ref>{{cite web|url=http://www.open-aurec.com/wbforum/viewtopic.php?f=24&t=52775|title=Winboard Forum • View topic - Anatomy of a simple engine: Fairy-Max|website=www.Open-Aurec.com|access-date=3 September 2017}}</ref> Among its features is the ability of users to define and use their own custom [[Fairy chess piece|variant chess pieces]] for use in games.<ref name="fm1"/>

Fairy-Max was derived from [[micro-Max]] (also developed by H.G. Muller), one of the smallest programs to play complete FIDE chess.<ref name="fm1"/> Therefore, Fairy-Max [[Software versioning|versioning]] started with version number 4.8, the version of micro-Max used.
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{{Chess programming series}}

=== 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.
[[File:Fairy_Max_output.png|thumb|upright=1.75|left|Game depiction showing output from the Fairy-Max chess engine]]
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=== Capabilities ===
Besides classical FIDE [[chess]], Fairy-Max is provided with a large selection of pre-defined games using [[fairy chess piece]]s, including  [[shatranj]] (ancient Iranian chess), [[xiangqi]] (Chinese chess), [[shogi]] (Japanese chess), [[makruk]] (Thai chess), [[King of the Hill (chess)|King of the Hill]], [[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.<ref name="fm1"/><ref>[https://manpages.debian.org/unstable/fairymax/fairymax.6.en.html fairymax - xboard-compatible chess and chess-variant engine 'Fairy-Max'] — Debian Manpages.</ref>

=== Playing strength ===
The engine's [[Elo rating system|Elo]] rating fluctuates at around 1900 when playing orthodox chess in [[CCRL 40/40]] chess engine tournament, which roughly corresponds to [[chess rating system|class A human player]].<ref>{{Cite web|url=https://ccrl.chessdom.com/ccrl/4040/cgi/compare_engines.cgi?family=Micro-Max&print=Rating+list&print=Results+table&print=LOS+table&print=Ponder+hit+table&print=Eval+difference+table&print=Comopp+gamenum+table&print=Overlap+table&print=Score+with+common+opponents|title = CCRL 40/15}}</ref>

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."<ref>{{cite web|url=http://www.open-aurec.com/wbforum/viewtopic.php?f=15&t=53716|title=Winboard Forum • View topic - ELO rating of Fairy max?|website=www.Open-Aurec.com|access-date=3 September 2017}}</ref><ref>{{cite web|url=http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=22612|title=Strange goings on|website=RybkaForum.net|access-date=3 September 2017|archive-date=4 September 2017|archive-url=https://web.archive.org/web/20170904014107/http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=22612|url-status=dead}}</ref>