FAIRYMAX(6)						User Contributed Perl Documentation					       FAIRYMAX(6)

NAME

       fairymax - xboard-compatible chess and chess-variant engine 'Fairy-Max'

SYNOPSIS

       fairymax [hashSize] [iniFile]

       shamax [hashSize] [iniFile]

       maxqi [hashSize] [iniFile]

DESCRIPTION

       fairymax is a program that plays chess and chess variants.  It uses the xboard/winboard chess-engine protocol to communicate.  Apart from
       'regular' chess (also known as the Mad-Queen variant), it can play Capablanca chess, gothic chess, knightmate, cylinder chess, berolina
       chess, superchess, makruk (Thai chess), courier chess, Seirawan Chess, Spartan chess and chess with Different Armies.  Fairy-Max can be
       easily configured by the user to play other variants as well, by modifying the ini file.  This ini file describes the rules of movement of
       the participating pieces and the initial board setup.

       Fairy-Max can also play shatranj, but in this case is not aware of the shatranj rule that a bare king loses.  So it might play sub-
       optimally in the late end-game.	A version of Fairy-Max adapted to implement the baring rule is available under the name shamax.

       Similarly, a version of Fairy-Max adapted to play Xiang Qi (Chinese Chess) is included in the fairymax package as well, under the name
       maxqi.

       fairymax is a derivative of the world's (once) smallest chess program (source-code wise), micro-Max.  The latter measures less that 2000
       characters, (about 100 code lines), and has a computer rating of around 2050 on the CCRL rating list.  Although this is about 1000 rating
       points behind the world champion, micro-Max still makes a quite tough opponent even for club players, although it is not unbeatable.

       The main difference between micro-Max and Fairy-Max is that the latter loads its move-generator tables, which specify how the various
       pieces move, from an external file, so it can be easily adapted to incorporate un-orthodox pieces.  For ease of use of the artificial-
       intelligence, Fairy-Max is equipped with I/O routines that allow it to run with the xboard graphical user interface.

       See xboard(6) for instructions about how to use fairymax through xboard. To start up quickly, you just need the command: xboard -fcp
       fairymax.  However, XBoard might not support symbols for every unorthodox piece in board sizes different from bulky, middling and petite.
       It might thus be advisable to specify a board size as well, e.g.  xboard -fcp shamax -boardSize middling -variant shatranj to get correct
       display of the elephant and general pieces in shatranj.	Note that to be able to play the chess variants, you will need xboard 4.3.14 or
       later.

       Some of the variants Fairy-Max plays are only partially supported by XBoard, and can only be played whith the legality-testing function of
       the latter switched off.  (This applies to cylinder chess, berolina chess, great shatranj, Spartan chess and chess with different armies.)
       For some variants even the name is unknown to XBoard, and they are all grouped under the catchall name 'fairy'.	Which variant is played by
       Fairy-Max when XBoard is set to 'fairy', can be determined by a combobox control in the XBoard 'Engine Settings' menu dialog.

       Fairymax supports multi-PV mode: by specifying a non-zero multi-PV margin in the Engine-Settings dialog of XBoard, Fairy-Max will not only
       print the principal variation for the best move, but also for every move that approaches the score of this best move to within the set
       margin.	(If it does not find the best move on the first try, this might lead to printing of a few extra lines below the threshold.)

       The fmax.ini file from which Fairy-Max by default takes the piece and game definitions is a self-documenting text file, which contains
       instructions for how to define new pieces and chess variants.  In addition it contains an extensive list of pre-defined pieces, incuding
       many not occurring in any of the pre-defined variants, which the user can draw on to define his own variants.

       Amongst the move types supported by Fairy-Max are normal leaper and slider moves, (e.g. knight and rook), divergent moves (i.e. capture and
       non-capture moves can be different) hoppers (which jump over other pieces, such as the Chinese cannon or the grasshopper), lame leapers
       (the move of which can be blocked on squares they cannot move to, such as the Chinese horse and elephant), and any combination thereof, in
       every possible direction.  The board width is configurable upto a width of 14 squares, and cylindrical boards (where left and right edge
       connect) are supported as well.

OPTIONS

       hashSize
	       If the first argument to fairymax is numeric, it is taken as an indicator for the amount of memory Fairy-Max is allowed to use for
	       its internal hash table.  The default value for this argument, 22, would result in a memory usage of 48MB.  Each next-higher number
	       doubles the memory usage, each next-lower halves it.  Running with less than 6MB (i.e. argument 19) is not recommended.	When
	       fairymax is running under xboard 4.3.15 the hash-table size can be set through the xboard menus, making this argument superfluous.

       iniFile A second or non-numeric first argument is taken as a filename.  Fairy-max will use the mentioned file in stead of its default
	       fmax.ini file to define the movement of pieces and initial setup of the variants.  This makes it easier to define your own
	       variants.

SEE ALSO

       xboard(6)

       http://www.chessvariants.org/index/msdisplay.php?itemid=MSfairy-max

       http://home.hccnet.nl/h.g.muller/max-src2.html

       http://www.open-aurec.com/wbforum/viewtopic.php?f=19&t=50387

AUTHOR

       Fairy-Max was written by H.G.Muller <h.g.muller@hccnet.nl>.

       This manual page was generated with pod2man(1).

perl v5.10.1							    2010-12-08							       FAIRYMAX(6)