Barre chord
fret 1, A shapex13531
B♭add9 is the B♭ added 9 chord. Its notes are B♭, D, F and C. It is the same chord as A♯add9. A major triad plus the ninth, without a seventh. Let the upper notes ring.
x13531
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 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 added 9 chords