Howdy Phil.
Castling is one of the two special moves in chess (along with en
passant). It is the only circumstance in which you can move the king
more than one space, and the only circumstance in which you can
move more than one piece in a single turn. It moves your king out of
the vulnerable center of the board and to a shelter near the corner. It
also moves your rook to a center file, where it can exert the most
influence as the mid-game progresses or end-game begins. However,
you cannot castle if you have moved your king or the rook with which
you want to castle in that game, and you cannot castle if it means that
you will be moving your king out of, into, or across Check.
To do it, simply move your king two squares over, towards the rook
with which you want to castle. The system will automatically place your
rook on the square towards the center of your base file from your
king's new square.
Most people castle every game, as far as I know. I know I usually do.
Hope this helps!
-david
btw, you spelled it correctly
Castling is a move that can strengthen your defence. There are two
forms of catling, Queens side and Kings side. These two moves are
almost identical. Basically what happens is that you get to move the
king and the rook (castle) at the same time and swap their position.
The king moves two squares towards the edge of the board and the
rook is then placed next to the king, on the same row but on the
inside of the king (so it has in effect junped the knig). In order to
preform this move thare must be no pieces inbetween the king and
the rook (so you have to move the bishop and knight out if the way).
Also The knig and the rook must not have moved off of their starting
square. Also you can't do it if your are in check or the squares your
king is moving through is threatened (you can't move through check).
chexk out this site for diagrams
http://www.geocities.com/Athens/Delphi/6551/smoves.htm
Hope This Helps 🙂