Minor Chords
------------
A minor chord is made up of the 1st (root), b3rd and 5th degree of a major scale.  
In the diagrams below, we modify the five major chord forms by flatting the 
3rd in each case, to make the minor chord.  

Cmin, C form    Cmin, A form    Cmin, G form    Cmin, E form    Cmin, D form
===========     +-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+
| | 1 | 2 | -1  1 1 | | | 1 -3  | | 1 1 | | -5  1 1 | 1 1 1 -8  | | | | | 1 -11
+-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+
| | | | | |     | | | | 2 |     | 2 | | | |     | | | | | |     | | | 2 | |
+-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+
4 3 | | | |     | | 3 4 | |     | | | | | |     | 3 4 | | |     | | 3 | 4 |
+-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+
| | | | | |     | | | | | |     4 | | | | |     | | | | | |     | | | | | |
+-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+     +-+-+-+-+-+
-----------     -----------     -----------     -----------     -----------
5   3b  1       5   5   3b      1   5   x       1   1   5       x   3b  1  
  1   5   x       1   1   5       3b  1   x       5   3b  1       x   5   3b

Some of these chords are less practical than others to use, but knowing them,
their position and relationship to the major chords is important to the over-
all understanding of the guitar.  Notice that the G (4th string) and C (3rd
string) are common between the 'A form' and the 'G form' minor shapes shown.
By combining them we get this commonly used C minor chord pattern:

+-+-+-+-+-+
| | | | 1 | -4
+-+-+-+-+-+
| | 2 3 | |
+-+-+-+-+-+
| 4 | | | |
+-+-+-+-+-+
----------- 
x   5   3b 
  3b  1   x