The basic guitar chords and associated diagrams.
When first starting out, you might as well forget about playing lead and concentrate on learning basic guitar chords.
You have to crawl before you can walk, walk before you can run, etc...so if you're a beginner you should practice all of these basic guitar chords until you can change from one to another without thinking about it.
On the following pages you'll find chord charts for the majority of the basic guitar chords.
And here is a diagram showing how to interpret the chord diagrams.