Root on A string
x1413x
B♭7♯5 is the B♭ dominant 7 sharp 5 chord. Its notes are B♭, D, F♯ and A♭. It is the same chord as A♯7♯5. The raised fifth adds tension before a resolution.
x1413x
Numbers show frets from the low E string to the high e string; x means don't play that string.
Every B♭, D, F♯ and A♭ on the first 12 frets. The filled dots are the root, B♭. Build your own shape from any nearby group.
Other B♭ chords
Other dominant 7 sharp 5 chords