Learn › A Half Diminished Chord on Guitar (Am7b5)
New Released in April 2026
A Half Diminished Chord on Guitar (Am7b5)
To play Am7b5 on guitar, press the strings shown below; some strings ring open. Then strum all six strings: the notes A, C, Eb, G ring together. First the picture, then each finger, then three chords to practise Am7b5 with.
No account, no download. The demo has limited content. Advanced features are in ChordRunner Premium.
- MIDI keyboard
- Digital or acoustic piano
- Guitar
- Computer, phone or tablet
Am7b5 guitar chord: shape and fingers
Where each finger goes
- Middle: 6th string (low E), fret 5
- Ring: 4th string (D), fret 5
- Little: 3rd string (G), fret 5
- Index: 2nd string (B), fret 4
Strings to play
5x554x: × = do not play, 0 = open string.
Where Am7b5 is used
Am7b5 leads to D7 and then home: it is the ii chord of a minor key, as in Am7b5 → D7 → Gm.
Which note each string plays
| 6th string (low E) | fret 5: A |
|---|---|
| 4th string (D) | fret 5: G |
| 3rd string (G) | fret 5: C |
| 2nd string (B) | fret 4: Eb |
From Adim to Am7b5: 4th string (D): fret 7 → fret 5.
Slide this shape along the neck: fret 3 = Gm7b5, fret 4 = Abm7b5, fret 6 = Bbm7b5, fret 7 = Bm7b5.
Practise Am7b5 with the microphone
Strum Am7b5 near the microphone when it comes up in ChordRunner: the game checks all four notes, A, C, Eb, G, and moves on. MIDI keyboard or microphone, both work. MIDI keyboard or microphone, both work.
Play the demoCommon questions
What notes are in the Am7b5 guitar chord?
A half diminished has three notes: A, C, Eb, G. On the guitar some of them are doubled on different strings, so all six (or five) strings sound like one chord.
What is the difference between Am7b5 and Adim on guitar?
Am7b5 adds one note to Adim: G, on top of A C Eb. From Adim to Am7b5: 4th string (D): fret 7 → fret 5.
Which fingers do I use for Am7b5?
Middle finger: 6th string (low E), fret 5, ring finger: 4th string (D), fret 5, little finger: 3rd string (G), fret 5, index finger: 2nd string (B), fret 4.
Does ChordRunner hear Am7b5 on guitar?
Yes. Strum it near the phone or computer microphone and the game checks the four notes A, C, Eb, G. A USB MIDI keyboard works too.
Your instrument is the controller.
ChordRunner is a browser game that teaches piano and guitar chords: a chord appears on screen, you play it on a real instrument, and your runner jumps. MIDI keyboard or microphone, both work.
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