Guitar · half diminished seventh
G♯m7♭5 Chord on Guitar
G# Half-Diminished 7th (m7♭5) is G#, B, D, F# — the 1-b3-b5-b7 pattern of a half diminished seventh chord. There are 2 ways to play it on guitar, ranked below from easiest to hardest.
There is no open G#m7b5 shape on guitar — every version asks for a barre, which is exactly why this chord stops so many players. The one marked “Movable Root-6 Shape (4th fret)” below is the friendliest grip, so start there.
Start here — Movable Root-6 Shape (4th fret)
Barre at fret 4 — harder to hold than an open shape, but movable: slide it and you have every other half diminished seventh chord.
Every way to play it — 2 shapes, easiest first
Same chord in all of them. What changes is how much your hand has to do and where on the neck it sits.
Movable Root-6 Shape (4th fret) Way 1 of 2
Movable Root-6 Shape (4th fret)
Easiest here· intermediate· the standard shape
Barre at fret 4 — harder to hold than an open shape, but movable: slide it and you have every other half diminished seventh chord.
Movable Root-5 Shape (11th fret) Way 2 of 2
Movable Root-5 Shape (11th fret)
intermediate
Barre at fret 11 — the same movable idea, further up the neck: brighter, more compact, and easier to reach if you are already playing up there.
What beginners get wrong
Moving in and out of it
The shape above: Movable Root-6 Shape (4th fret) — barred at fret 4.
Listening: each shape above has its own play button, and each one plays the notes that shape actually produces — not a generic triad.
G#m7b5 on other instruments
Same notes, different hands. Every link below is a real page with diagrams and audio.
Piano
G♯m7♭5 on piano
3 voicings · easiest is intermediate
Ukulele
G♯m7♭5 on ukulele
1 voicing · easiest is intermediate
Bass
G♯m7♭5 on bass
1 voicing · easiest is advanced
Mandolin
G♯m7♭5 on mandolin
1 voicing · easiest is intermediate
Banjo
G♯m7♭5 on banjo
1 voicing · easiest is advanced
Or see G# Half-Diminished 7th (m7♭5) on every instrument at once.
Chords next door
Same root, different colour — and all of them playable on guitar.
G#m7b5 on Guitar — questions people ask
What is the easiest way to play G#m7b5 on guitar?
“Movable Root-6 Shape (4th fret)” — which we rate intermediate — is the easiest G#m7b5 shape on guitar. Barre at fret 4 — harder to hold than an open shape, but movable: slide it and you have every other half diminished seventh chord. There is no open G#m7b5 on guitar, so a barre is unavoidable; this is the least demanding one.
What notes are in the G# Half-Diminished 7th (m7♭5) chord?
G# Half-Diminished 7th (m7♭5) is G#, B, D, F# — the 1-b3-b5-b7 interval pattern of a half diminished seventh chord. Every voicing on this page uses those notes and nothing else; they just appear in a different order and octave.
How many ways can you play G#m7b5 on guitar?
This page has 2 G#m7b5 voicings for guitar, ranked from easiest to hardest: Movable Root-6 Shape (4th fret), Movable Root-5 Shape (11th fret). They all sound like G#m7b5; the differences are how hard they are to hold and how high they sit.
What can I play instead of G#m7b5?
The nearest stand-ins on guitar that keep the same root are G#m, G#m7, G#dim. They keep the root and the fifth and only change what sits in the middle, so most songs still work — but check the swap against the melody, because the note you removed may be the one the tune is singing.
Can I play G#m7b5 on other instruments?
Yes. G#m7b5 is the same set of notes everywhere; only the fingering changes. This site has diagrams and audio for it on piano, ukulele, bass, mandolin, banjo.
Learn the theory behind G#m7b5
The shape gets your fingers there. These explain why it sounds the way it does.
Barre Chords — The Wall Every Guitarist Climbs
This one asks for a barre. The article is the fix for the buzzing and the aching hand.
7 min read
Functional Harmony: Three Roles, One Engine
Diminished chords are almost always doing a job. This explains which one.
6 min read
Cadences — The Four Ways a Phrase Ends
Where all that tension goes — how the chord resolves into the next one.
4 min read