B♭7♯9 8-string guitar chord

How to play B♭7♯9 on 8-string guitar

The most common way, the first shape above: your middle finger on the low E string at the 6th fret, your index finger on the A string at the 5th fret, your ring finger on the D string at the 6th fret, your ring finger on the G string at the 6th fret, your ring finger on the high B string at the 6th fret and your ring finger on the high E string at the 6th fret. Don’t play the F♯ and low B strings.

From the F♯ string x x 6 5 6 6 6 6 (x: not played, 0: open)

What notes are in B♭7♯9?

B♭7♯9, B♭ dominant seventh sharp nine, is B♭, D, F, A♭ and C♯: the root (B♭), the major third (D), the perfect fifth (F), the minor seventh (A♭) and the sharp ninth (C♯). Its formula is 1 3 5 ♭7 ♯9.