Root on A string
no fifthx-13-12-13-13-x
B♭9 is the B♭ dominant 9 chord. Its notes are B♭, D, F, A♭ and C. It is the same chord as A♯9. A dominant seventh with a ninth added. Try it in a blues turnaround.
x-13-12-13-13-x
Numbers show frets from the low E string to the high e string; x means don't play that string.
Every B♭, D, F, A♭ and C 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 9 chords