××DAbDF
Fig. 1 · Ddim · open

guitar chord

Ddim

D1F♭3A♭♭5

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

on ukuleleon pianothe scale

Every fingering that fits a hand

Fig. 2

xx0131

open

Fig. 3

x50764

hard

Fig. 4

xx0764

easy

5
Fig. 5

x5676x

hard

9
Fig. 6

xxca9a

hard

What is true of it

Ddim is D, F and A♭ — 1, b3 and b5 counted from D.

The easiest of the 5 fingerings below is xx0131: 3 fingers, held at the 1st fret.

1 of them use open strings, which is what makes a shape quiet to change to.

2 strings stay silent.

Where its notes are on the neck

EADGBE123456789101112b3b511b3b51b3b51b51b31b3b5b3b51
Fig. 7 — first 12 frets

The brass dots are D, the root. Everything else is a chord tone with its degree printed in it.

With a different note underneath

first inversion

Ddim/F

xx3131

second inversion

Ddim/A♭

45076x

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.

D in other shapes

DmajorDmminorDaugaugmentedD5power chordDsus2suspended secondDsus4suspended fourth

CdimC♯dimD♭dimD♯dimE♭dimEdimFdimF♯dimall 374