Learn › B Flat Half Diminished Chord on Guitar (Bbm7b5)
New Released in April 2026
B Flat Half Diminished Chord on Guitar (Bbm7b5)
The B flat half diminished chord on guitar (Bbm7b5) uses the notes Bb, Db, Fb, Ab. It is an open chord: some strings ring without fingers. Strum from the 5th string down. Below: the diagram, which finger goes where, a second shape and the chords that go with it.
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
The B flat half diminished guitar chord, finger by finger
Where each finger goes
- Index: 5th string (A), fret 1
- Ring: 4th string (D), fret 2
- Middle: 3rd string (G), fret 1
- Little: 2nd string (B), fret 2
Strings to play
x1212x: × = do not play, 0 = open string.
Bbm7b5 string by string
| 5th string (A) | fret 1: Bb |
|---|---|
| 4th string (D) | fret 2: Fb |
| 3rd string (G) | fret 1: Ab |
| 2nd string (B) | fret 2: Db |
From Bbdim to Bbm7b5: 3rd string (G): fret 3 → fret 1.
Slide this shape along the neck: fret 2 = Bm7b5, fret 3 = Cm7b5, fret 4 = C#m7b5, fret 5 = Dm7b5.
Another way to play Bbm7b5
Players switch to this position to keep the hand in one area of the neck.
Where Bbm7b5 is used
Bbm7b5 leads to Eb7 and then home: it is the ii chord of a minor key, as in Bbm7b5 → Eb7 → Abm.
Practise Bbm7b5 with the microphone
Strum Bbm7b5 near the microphone when it comes up in ChordRunner: the game checks all four notes, Bb, Db, Fb, Ab, and moves on. MIDI keyboard or microphone, both work. MIDI keyboard or microphone, both work.
Play the demoCommon questions
Is Bbm7b5 easy on guitar?
Yes, it is one of the open chords beginners learn first. Start slowly, check that every string rings, then practise switching to Bbdim.
What is the difference between Bbm7b5 and Bbdim on guitar?
Bbm7b5 adds one note to Bbdim: Ab, on top of Bb Db Fb. From Bbdim to Bbm7b5: 3rd string (G): fret 3 → fret 1.
Which fingers do I use for Bbm7b5?
Index finger: 5th string (A), fret 1, ring finger: 4th string (D), fret 2, middle finger: 3rd string (G), fret 1, little finger: 2nd string (B), fret 2.
Does ChordRunner hear Bbm7b5 on guitar?
Yes. Strum it near the phone or computer microphone and the game checks the four notes Bb, Db, Fb, Ab. 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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