Learning to form chords can be less daunting with the knowledge that many chords can have more than one name,

depending on the musical context which determines its root note. Not only does this expand your chord library but

amazingly each exact same chord will sound different because our ear will 'hear' the component notes differentially!

One common example of this phenomenon is the minor 7th/major 6th pair. Remember you count the strings from

the right to the left, so 1st vertical line is the (A) string, then it goes E; C; G in that order to the last vertical on left.

Now let's examine some chameleon chords:-

the root is on the open 1st(A)string ...... here the root is on the 3rd(C)string. Notes unchanged!

R = 3rd (C) string R = 2nd (E) string

R = 1st (A) string R = 3rd (C) string

R = 4th (G) string (an inverted form) R = 1st (A) String (an inverted form)

R = 2nd (E) string R = 4th (G) string where you play the G# (the chord is Ab! too)

You can find other examples including inversions like 2nd Am7 -> C6 example here. It is for you to locate others now!

All diminished chords are also 7ths with flat 9s. Can you verify this for yourself ?