3 dimensiopnal chess

[mirhagk]

I was thinking about making it, but all the rules i've seen so far seem silly, or kinda just made up, so I invented my own, tell me what you think of it:

these are the boolean expressions checking to see if a certain move is valid for a given piece. (note that x is sideways, y is

forward and backward, z is up or down. z=1 means up, and y=1 means forward, also n means any integer)
(_means absolute value, or magnitude)

(also it's a given that pieces cannot "move" onto their own square)

piece traditional 3d
pawn y=1&&x=0 (y=1||z=1)&&x=0
rook y=0||x=0 (y=0&&x=0)||(y=0&&z=0)||(x=0&&z=0)
bishop _y=_x _y=_x=_z
knight _(_y-_x)=1&&_y+_x=1 _(_y-_x-_z)=1&&_y+_x+_z=1
queen _y=_x||y=0||z=0 _y=_x=_z||(y=0&&x=0)||(y=0&&z=0)||(x=0&&z=0)||[not sure](_y=_x&&z=0)||(_y=_z&&x=0)||(_x=_z&&y=0)
king _y+_x=1||_y=_x=1 y+x+z=1||(_y=_x=1&&z=0)||(_y=_z=1&&x=0)||(_x=_z=1&&y=0)


please note that the pawns move two intial rule means that the have the option of moving a second time.
here also is the valid attack rules
piece traditional 3d
pawn y=x=1 y=x=z=1
rook same as move same as move
bishop same as move same as move
knight same as move same as move
queen same as move same as move

king same as move same as move

[Tony]

If you want extra dimensions, Alice Chess http://en.wikipedia.org/wiki/Alice_chess is an interesting variant.