Gm7♭5

G1B♭♭3D♭♭5F♭7

A diminished triad with a minor seventh rather than a diminished one — half diminished, and not the same chord as dim7.

on ukulele on piano the scale

Every fingering that fits a hand

Fig. 2

31302x

moderate

Fig. 3

343363

moderate · barre

Fig. 4

3433xx

moderate · barre

Fig. 5

343066

hard · barre

Fig. 6

343366

hard · barre

What is true of it

Gm7♭5 is G, B♭, D♭ and F — 1, b3, b5 and b7 counted from G.

These are also the notes of B♭m6/G and A♯m6/G. Which name is right depends on what is underneath and what came before — the notes alone do not decide.

The easiest of the 5 fingerings below is 31302x: 4 fingers, held at the 1st 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.

4 of the 5 need a barre.

1 string stays silent.

Where its notes are on the neck

Fig. 7 — 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

Gm7♭5/B♭

x13021

second inversion

Gm7♭5/D♭

x45066

third inversion

Gm7♭5/F

113023

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

G7dominant seventh Gmaj7major seventh Gm7minor seventh Gmajor Gmminor Gdimdiminished

Cm7♭5 C♯m7♭5 D♭m7♭5 Dm7♭5 D♯m7♭5 E♭m7♭5 Em7♭5 Fm7♭5 all 374