Half-Diminished Chord

Half-Diminished Chord (Minor 7b5)

The half-diminished chord is simply the diminished chord with the b7th note added.

Let’s use the C diminished chord to show this:

C diminished

C half-diminished

Half-diminished Chord Formula:

The half-diminished chord formula is 1-b3-b5-b7 (i.e. the Root, b3rd, b5th, and b7th notes).

You can use MusicWheels™ to discover all the other half-dimished chords and their notes.

Guitar Diagrams

Half-Diminished Chords - CAGED - Across the Fretboard

The diagrams below show the generic CAGED shapes for dominant 9 chords.

The blue note is the root note of the chord, for example:

– if you wish to play the A9 (dom9) chord then the blue root note will be the note of A

– if you wish to play the D9 (dom9) chord then the blue root note will be the note of D and so on.

Keyboard Diagrams