xtic - X version of a simple but tricky board game
The board is made up of 4x4 squares and 16 pieces. The pieces carry 4 properties
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
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).
There are two menus, the Actions Menu and the Options 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.
- Exist from xtic.
- 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
- 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.
Probably plenty. Report any you find to firstname.lastname@example.org
Mattias Jonsson, Dept of Mathematics, Royal Institute of Technology, S-100 44
email: email@example.com, URL: http://www.math.kth.se/~mjo