guitar chord
B11
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
704600
easy · no 3
x22222
moderate · barre · no 3
x22220
moderate · barre · no 3, 5
704640
moderate
x21220
moderate · no 5
What is true of it
B11 is B, D♯, F♯, A, C♯ and E — 1, 3, 5, b7, 9 and 11 counted from B.
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 704600: 3 fingers, 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.
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.
Where its notes are on the neck
The brass dots are B, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
B11/D♯
xx1220
B11/F♯
222220
B11/A
504600
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.