fretnot

B♭°R · ♭3 · ♭5

B♭ diminished chord — dots are where your fingers go, × means skip that string.

DADGAD357♭5♭3♭5R♭3♭5
Root
dots
Chord
Scaleoptional
Shape2 4 2 3 4 2 — frets · 4 fingers
In B♭ natural minortap any · they fit together