For those that have never played Chess before, we strongly reccomend taking a look at some of the site's online that are dedicated to teaching people, especially newcomers, how to play.
One of the best site's we have come accross have been included in the programs help files.
SoYouWanna learn how to play chess
The site is geared mainly toward teaching those that are playing 'real' chess, or playing on an actual 'real board' rather than a computer one. However, it has lots of information that you will find useful.
Unfortunately, because of the amount of rules, and information involved in describing how to play and what you can and cannot do in Chess, we are unable to provide this information to you on this site. We are working on this for you, and will add it once complete.
We have built in a form of "rules" that will help you when playing. For example, it will not allow you to move your Rook (castle) diagonally, nor will it allow you to move the king more than one square at a time, just like in real chess.