guitar chord
A♭m9
A minor seventh with a ninth on top.
Written the other way round it is G♯m9 — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
464406
moderate · barre
464446
moderate · barre
42430x
hard · no 5
46430x
hard
41410x
hard · no 5
What is true of it
A♭m9 is A♭, C♭, E♭, G♭ and B♭ — 1, b3, 5, b7 and 9 counted from A♭.
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 464406: 3 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♭m9/C♭
x21302
A♭m9/E♭
xx1302
A♭m9/G♭
21110x
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.