B♭m9♭5 6-string bass chord

How to play B♭m9♭5 on 6-string bass

The most common way, the first shape above: lay your index finger flat across the four strings from the B to the D at the 11th fret, your middle finger on the E string at the 12th fret, your little finger on the G string at the 13th fret and your ring finger on the C string at the 12th fret.

From the B string 11 12 11 11 13 12 (x: not played, 0: open)

What notes are in B♭m9♭5?

B♭m9♭5, B♭ half-diminished ninth, is B♭, D♭, F♭, A♭ and C: the root (B♭), the minor third (D♭), the diminished fifth (F♭), the minor seventh (A♭) and the ninth (C). Its formula is 1 ♭3 ♭5 ♭7 9.