Root on A string
no fifthx-13-11-13-13-x
B♭m9 is the B♭ minor 9 chord. Its notes are B♭, D♭, F, A♭ and C. It is the same chord as A♯m9. A minor seventh with a ninth. This compact grip omits the fifth.
x-13-11-13-13-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 minor 9 chords