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XTIC(1)			    General Commands Manual		       XTIC(1)

NAME
       xtic - X	version	of a simple but	tricky board game

RULES
       The  board  is made up of 4x4 squares and 16 pieces. The	pieces carry 4
       properties each,	namely:

       o Black or brown

       o Horizontal or vertical

       o Solid or hollow

       o Round or square

       This makes a total of 16	possible pieces	 and  there  are  exactly  one
       piece of	each type (so each piece can be	represented by a binary	number
       of length 4).

       Initially, the board is	empty  and  it	is  successively  filled  with
       pieces.	The  game  is over when	a row, a column	or a diagonal has four
       pieces carrying a common	property in it,	e.g. four  black  pieces.  The
       player who places the fatal piece loses.

       The  game  is  a	two-player game, although in the current release, only
       the human-computer combination is supported.  Player 1  (the  human  by
       default)	 chooses  one  of the 16 pieces. Player	2 (the computer	by de-
       fault) places this piece	on one of the 16  squares  of  the  board  and
       chooses a piece out of the remaining 15 pieces which he gives to	player
       1, who places this piece	on one of the  remaining  15  squares  on  the
       board, etc.

       As  mentioned  above,  the game is over when a player places a piece in
       such a way that a row, a	column or a diagonal (but see below)  contains
       four  pieces  carrying  a  common property.  The	player who places this
       piece loses. If there is	no empty square	left, we  have	a  draw	 (yes,
       this can	happen).

MENU COMMANDS
       There are two menus, the	Actions	Menu and the Options Menu.

Actions	Menu
       New game	- You start
	       Starts a	new game of xtic, ending the previous one abruptly and
	       letting the human start.

       New game	- I start
	       Identical to "New game -	You start" except  that	 the  computer
	       will begin the next game.

       Quit    Exist from xtic.

Options	Menu
       Level trivial
	       The  easiest  level.  The  computer only	tries to place the se-
	       lected piece in a way that it does not  lose  immediately,  and
	       chooses	any  free  piece to give away, i.e. it thinks only one
	       move ahead.

       Level easy
	       The computer thinks two moves ahead.

       Level medium
	       The computer thinks three moves ahead.

       Level hard
	       The computer thinks four	moves ahead.

       Level very hard
	       The computer thinks five	moves ahead.

       Level don't try
	       The computer thinks six moves ahead. This  can  be  quite  slow
	       (and hard).

       Game Type: normal
	       In addition to the rows and columns, the	two main diagonals are
	       dangerous (can make the game end).

       Game Type: nodiags
	       Only the	rows and columns are dangerous.

       Game Type: torus
	       All 8 "diagonals" are dangerous.	This corresponds to playing on
	       a torus.

BUGS
       Probably	plenty.	Report any you find to mjo@math.kth.se

AUTHOR
       Mattias	Jonsson,  Dept	of Mathematics,	Royal Institute	of Technology,
       S-100 44	Stockholm, Sweden.

       email: mjo@math.kth.se, URL: http://www.math.kth.se/~mjo

Mattias	Jonsson, KTH		      X11			       XTIC(1)

NAME | RULES | MENU COMMANDS | Actions Menu | Options Menu | BUGS | AUTHOR

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