http://guitarcastle.blogspot.com/
Check all the posts in this blog to learn guitar scales and chord. You will get a clear image about how the chords are placed on the fretboard of guitar by looking those images. You can enlarge the images by clicking on it.
Look up on the C major scale : It is a natural scale. When you go through the older posts of chords and scales it will be much more clear for you.
All the best and have a nice time!
