guitar chord
D♯dim
Two minor thirds stacked. The fifth is diminished, so it cannot be dropped without losing the chord.
Written the other way round it is E♭dim — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
xx1242
hard
x6787x
hard
xxdbab
hard
bcdbxx
moderate · barre
What is true of it
D♯dim is D♯, F♯ and A — 1, b3 and b5 counted from D♯.
The easiest of the 4 fingerings below is xx1242: 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 4 need a barre.
2 strings stay silent.
Where its notes are on the neck
The brass dots are D♯, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
D♯dim/F♯
2012xx
D♯dim/A
x04242
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.