guitar chord
C♯
A major third and a perfect fifth over the root.
Written the other way round it is D♭ — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
x4312x
hard
x4666x
hard
9bba99
hard · barre
x46664
hard · barre
9866xx
hard
What is true of it
C♯ is C♯, E♯ and G♯ — 1, 3 and 5 counted from C♯.
On an instrument that cannot reach all 3, the 5 goes first, in that order.
The easiest of the 5 fingerings below is x4312x: 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.
2 of the 5 need a barre.
2 strings stay silent.
Where its notes are on the neck
The brass dots are C♯, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
C♯/E♯
143121
C♯/G♯
446664
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.