guitar chord
E♭11
Six notes in theory; in practice the third is usually dropped, because the eleventh sits a half step above it.
Written the other way round it is D♯11 — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
x66666
moderate · barre · no 3
x6666x
moderate · barre · no 3, 5
bbbcbd
moderate · barre
xx1121
moderate · barre · no 3, 5
bbbdbd
moderate · barre · no 3
What is true of it
E♭11 is E♭, G, B♭, D♭, F and A♭ — 1, 3, 5, b7, 9 and 11 counted from E♭.
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 x66666: one finger, one of them barring the 6th fret, held at the 6th 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.
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 E♭, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
E♭11/G
343344
E♭11/B♭
666666
E♭11/D♭
x43044
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.