guitar chord
A♭
A major third and a perfect fifth over the root.
Written the other way round it is G♯ — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
466544
hard · barre
4311xx
hard
xx6544
hard
4665xx
hard
46654x
hard · barre
What is true of it
A♭ is A♭, C and E♭ — 1, 3 and 5 counted from A♭.
On an instrument that cannot reach all 3, the 5 goes first, in that order.
The easiest of the 5 fingerings below is 466544: 4 fingers, one of them barring the 4th fret, held at the 4th 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.
Where its notes are on the neck
The brass dots are A♭, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
A♭/C
x3111x
A♭/E♭
xx1114
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.