guitar chord
Aadd9
A major triad with a ninth added and no seventh — which is what tells it apart from a ninth chord.
Every fingering that fits a hand
x02420
easy
502420
moderate
542200
moderate
542400
moderate
547400
moderate
What is true of it
Aadd9 is A, C♯, E and B — 1, 3, 5 and 9 counted from A.
On an instrument that cannot reach all 4, the 5 goes first, in that order.
The easiest of the 5 fingerings below is x02420: 3 fingers, 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 string stays silent.
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
Aadd9/C♯
x42200
Aadd9/E
002420
Aadd9/B
x22220
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.