guitar chord
A11
Six notes in theory; in practice the third is usually dropped, because the eleventh sits a half step above it.
Every fingering that fits a hand
x00000
open · no 3
540000
easy
x0000x
open · no 3, 5
x00003
open · no 3, 5
520000
easy · no 3
What is true of it
A11 is A, C♯, E, G, B and D — 1, 3, 5, b7, 9 and 11 counted from A.
On an instrument that cannot reach all 6, the 3, 5 and 1 go first, in that order.
The easiest of the 5 fingerings below is x00000: 0 fingers and nothing above the third fret.
3 of them use open strings, which is what makes a shape quiet to change to.
It leaves out the 3. 6 strings cannot carry 6 notes, and the 3 is the one this chord can lose without changing what it is.
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
A11/C♯
x40000
A11/E
000000
A11/G
300000
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.