Chord Construction

Front 1

Major

Back 1

1,3,5

Front 2

Minor

Back 2

1,b3,5

Front 3

Augmented

Back 3

1,3,#5

Front 4

Diminished

Back 4

1,b3,b5

Front 5

sus2

Back 5

1,2,5

Front 6

sus4

Back 6

1,4,5

Front 7

Major 7th

Back 7

1,3,5,7

Front 8

Minor 7th

Back 8

1,b3,5,b7

Front 9

Minor 7b5
(half diminished)

Back 9

1,b3,b5,b7

Front 10

diminished 7

Back 10

1,b3,b5,bb7

Front 11

6 chord

Back 11

1,3,5,6

Front 12

minor 6

Back 12

1,b3,5,6