guitar chord
F11
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
11101x
moderate · no 3
111213
moderate · barre
1110xx
moderate · barre · no 3, 5
x88888
moderate · barre · no 3
111313
moderate · barre · no 3
What is true of it
F11 is F, A, C, E♭, G and B♭ — 1, 3, 5, b7, 9 and 11 counted from F.
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 11101x: 4 fingers, held at the 1st 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.
4 of the 5 need a barre.
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 F, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
F11/A
503046
F11/C
888888
F11/E♭
x63046
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.