9. C Half-Diminshed Chord Tree

(Locrian / Locrian ♯2)

Last but certainly not least let’s take a look at the C Half Diminished Chord Tree.
The difference between Locrian and Locrian ♯2 is only that the latter contains a usable tension 9, therefore providing 1 more layer of symbol/sound.
For most musical situations the basic symbol (a2) is enough but by all means use the others if necessary.

Color codes for chord trees
C Half-Diminished Chord Tree
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