guitar chord
A♯maj7
Major triad with a major seventh: a half step below the root, an octave up.
Written the other way round it is B♭maj7 — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
600365
moderate
600366
moderate
60036x
easy
x10231
moderate
600335
moderate · no 5
What is true of it
A♯maj7 is A♯, C𝄪, E♯ and G𝄪 — 1, 3, 5 and 7 counted from A♯.
C𝄪 and G𝄪 are double sharps, and they have to be: every letter from A♯ upwards is used once, so the 3 cannot be written any other way.
On an instrument that cannot reach all 4, the 5 goes first, in that order.
The easiest of the 5 fingerings below is 600365: 4 fingers, held at the 3rd 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.
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
A♯maj7/C𝄪
x50365
A♯maj7/E♯
100331
A♯maj7/G𝄪
x00331
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.