2nd position-A shape, 3rd -G shape, etc..........
When forming the A chord, you start the 1st position using the A shape, 2nd position - G shape, 3rd - E shape, etc.............
So, 1-5 shapes in the C chord = C-A-G-E-D
1-5 shapes in the A chord = A-G-E-D-C
-----------------G chord = G-E-D-C-A
-----------------E chord = E-D-C-A-G
-----------------D chord = D-C-A-G-E
C A G E D
A
G
E
D
When forming the F chord, you would use the E-D-C-A-G sequence starting the E shape on the 1st fret (Barre chord).
When forming the B chord, you would use the A-G-E-D-C sequence starting the A shape on the 2nd fret.
Chord substitution and extensions may always be experimented with, Let's use an E7 (no 5th) in the 3rd position, which would require using the C shape according to the sequence above for the E chord. AN SRV Favorite.
-----------------------------
------------5----------------
------------------7----------
---------------6-------------
------------------7----------
-----------------------------
Now let's use an A Major in the 3rd position, that's an E shape
------------5----------------
------------5----------------
---------------6-------------
-------------------7---------
-------------------7---------
------------5----------------
When looking at these shapes, things start to relate to each other, like how the C shape and the D shape interlock.
