I like playing Chinese Chess (象棋).

One day, I would play with my a remote friend. I use GNU/Linux with 
GNOME desktop, search this game program on the internet, but could 
not find it. I decided write one by myself, using GTK+.

My English is very poor. :(  I readed the GTK+ API document, wrote this 
program, so it may be very simple, weak. Would you like to help me?


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Chinese Chess Rules

1.The Xiangqi board is made up of ten horizontal lines and nine vertical lines. 
The verticals are interrupted by a central-horizontal void called a river. 
Two palaces are positioned at opposite sides of the board. Each is distinguished 
by a cross connecting its four corner points.Chinese Chess pieces are played on 
line intersections which are called points.

2.Each player has the following pieces:
  2 Rooks       (R)     (or chariots)
  2 Knights     (N)     (or horses)
  2 Elephants   (M)     (or bishops or ministers)
  2 Mandarins   (G)     (or advisors or assistants or guards)
  1 King        (K)     (or generals)
  2 Cannons     (C)
  5 Pawns       (P)     (or soldiers) 
and the pieces are shown below:  
       R-N-M-G-K-G-M-N-R
       +-+-+-+-+-+-+-+-+ 
       +-C-+-+-+-+-+-C-+
       P-+-P-+-P-+-P-+-P
       +-+-+-+-+-+-+-+-+
       |     river     |
       +-+-+-+-+-+-+-+-+
       P-+-P-+-P-+-P-+-P
       +-C-+-+-+-+-+-C-+
       +-+-+-+-+-+-+-+-+ 
       R-N-M-G-K-G-M-N-R

3.(R) Rooks can move horizontally or vertically for any empty spaces.
  (N) Knights can only move one space horizontally or vertically and another 
space diagonally to either forward direction. Knights can also be blocked. 
If there is a piece (from either side) right next to the Knight, the Knight 
CANNOT move toward that direction.
  (C) Cannons can move horizontally or vertically for any empty spaces just 
like Rooks. However, to take a piece, a cannon has to jump over another piece 
(which is called a CANNON MOUNT) from either side. There is no limit on the 
empty spaces between Cannon and the cannon mount or between cannon mount and 
the piece being taken.
  (M) Ministers' movements are confined to its own territory, which means a 
Minister cannot move across the river. Ministers move diagonally and at two 
spaces at a time, which means it always moves up or down for two spaces and 
left or right for another two spaces. Therefore, a Minister can only be on 
seven spots in the board. A Minister can be "blocked", that is if there is 
a piece (from either side) in the next diagonal space of the Minister, the 
Minister cannot move toward that direction.
  (G) Guards are also confined to the palace. Guards move one diagonal space 
at a time and cannot move horizontally or vertically.
  (K) King's movements are limited to the palace (the center square marked 
with an X). King moves one space (step) at a time and can only move vertically 
or horizontally. King cannot move diagonally.
  (P) Pawns move one space at a time. Before a Pawn moves across the river, 
it moves forward only. Once a Pawn has moved across the river, it can move 
forward or horizontally to either direction. A Pawn can NEVER move backward.

4. Red moves first.
  The game is won by checkmating or stalemating the opponent King.
  Perpetual check is forbidden. You cannot check your opponent more than THREE 
times in a row with the same piece and same board positions.
  You cannot force an enemy piece to move to and from the same two points, 
indefinitely, in order to avoid capture. The purpose of this rule (and the 
above rule) is to avoid perpetual-check draws. Some of these situations are 
complicated, but the person who is forcing the perpetual move must usually 
break it off.
  The game is a draw when neither side can force a checkmate or a stalemate.

5. Kings are not allowed to face each other directly. This means there must 
be at least a piece from either side in the vertical line between the two 
kings. A King will be captured if it moves into the "line of sight" of the 
other King.

6. Other infomations and rules you can find it in the internet.