XTIC(1) Mattias Jonsson, KTH XTIC(1)
X11
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
default) 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
- 1 - Formatted: February 22, 2025
XTIC(1) Mattias Jonsson, KTH XTIC(1)
X11
will begin the next game.
Quit Exist from xtic.
Options Menu
Level trivial
The easiest level. The computer only tries to place the
selected 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
- 2 - Formatted: February 22, 2025
