guitar chord
F♯9
A dominant seventh carrying a ninth on top.
Written the other way round it is G♭9 — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
242324
hard · barre
2121xx
hard · no 5
xx4354
hard · no 5
x9899x
hard · no 5
ededxx
hard · no 5
What is true of it
F♯9 is F♯, A♯, C♯, E and G♯ — 1, 3, 5, b7 and 9 counted from F♯.
On an instrument that cannot reach all 5, the 5 and 1 go first, in that order.
The easiest of the 5 fingerings below is 242324: 4 fingers, one of them barring the 2nd fret, held at the 2nd 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.
Where its notes are on the neck
The brass dots are F♯, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
F♯9/A♯
676676
F♯9/C♯
x46350
F♯9/E
012120
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.