G♭dim

G♭1B♭♭♭3D♭♭♭5

Two minor thirds stacked. The fifth is diminished, so it cannot be dropped without losing the chord.

Written the other way round it is F♯dim — the same twelve keys on a piano, a different piece of notation.

on guitar on piano the scale

Every fingering that fits a hand

Fig. 2

x653

easy

Fig. 3

b989

hard

Fig. 4

b98x

easy

What is true of it

G♭dim is G♭, B♭♭ and D♭♭ — 1, b3 and b5 counted from G♭.

B♭♭ and D♭♭ are double flats, and they have to be: every letter from G♭ upwards is used once, so the b3 cannot be written any other way.

The easiest of the 3 fingerings below is x653: 3 fingers, held at the 3rd fret.

None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.

1 string stays silent.

Where its notes are on the neck

Fig. 5 — first 12 frets

The brass dots are G♭, the root. Everything else is a chord tone with its degree printed in it.

With a different note underneath

first inversion

G♭dim/B♭♭

2020

second inversion

G♭dim/D♭♭

x020

An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.

G♭ in other shapes

G♭major G♭mminor G♭augaugmented G♭5power chord G♭sus2suspended second G♭sus4suspended fourth

Cdim C♯dim D♭dim Ddim D♯dim E♭dim Edim Fdim all 374