guitar chord
B♭
A major third and a perfect fifth over the root.
Written the other way round it is A♯ — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
x10331
moderate
x1033x
open · no 5
65036x
hard
x1333x
hard
65033x
hard · no 5
What is true of it
B♭ is B♭, D and F — 1, 3 and 5 counted from B♭.
On an instrument that cannot reach all 3, the 5 goes first, in that order.
The easiest of the 5 fingerings below is x10331: 4 fingers, held at the 1st fret.
1 of them use open strings, which is what makes a shape quiet to change to.
1 string stays silent.
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
B♭/D
xx0331
B♭/F
11033x
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.