Bdim

B1D♭3F♭5

Two minor thirds stacked. The fifth is diminished, so it cannot be dropped without losing the chord.

on guitar on piano the scale

Every fingering that fits a hand

Fig. 2

4212

moderate

Fig. 3

421x

easy

Fig. 4

4575

hard

Fig. 5

xba8

easy

What is true of it

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

The easiest of the 4 fingerings below is 4212: 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.

Where its notes are on the neck

Fig. 6 — 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

Bdim/D

x212

second inversion

Bdim/F

x575

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

Bmajor Bmminor Baugaugmented B5power chord Bsus2suspended second Bsus4suspended fourth

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