B♭dim

B♭1D♭♭3F♭♭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 A♯dim — the same twelve keys on a piano, a different piece of notation.

on ukulele on piano the scale

Every fingering that fits a hand

Fig. 2

x12320

moderate

Fig. 3

x1232x

hard

Fig. 4

xx8656

hard

Fig. 5

6786xx

moderate · barre

Fig. 6

xx89b9

hard

What is true of it

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

The easiest of the 5 fingerings below is x12320: 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.

1 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 B♭, the root. Everything else is a chord tone with its degree printed in it.

With a different note underneath

first inversion

B♭dim/D♭

x42320

second inversion

B♭dim/F♭

012320

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.

B♭ in other shapes

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

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