Bm7b5 is a half-diminished, spelled B, D, F and A. In Open G tuning (D2 G2 D3 G3 B3 D4) the easiest shape is x40203, which sits at fret 2, spans 2 frets, lets 2 strings ring open and mutes 1 string. 12 positions for it are shown below, from the nut up to fret 14.
Notes and intervals
Note
B
D
F
A
Interval
1P
3m
5d
7m
12 ways to play it
Ordered by how hard they are to fret, easiest first, one per position on the neck. Fret numbers are relative to the position marked beside each grid.
x40203sits at fret 2, spans 2 frets, lets 2 strings ring open and mutes 1 string910010100sits at fret 9, spans 1 fret and lets 2 strings ring openx40767sits at fret 4, spans 3 frets, lets 1 string ring open and mutes 1 string977700sits at fret 7, needs a barre across 3 strings at fret 7 and lets 2 strings ring openxx9767sits at fret 6, spans 3 frets and mutes 2 stringsx43707sits at fret 3, spans 4 frets, lets 1 string ring open and mutes 1 string014151400sits at fret 14, needs a barre across 3 strings at fret 14 and lets 3 strings ring open014014012sits at fret 12, spans 2 frets and lets 3 strings ring open01001400sits at fret 10, spans 4 frets and lets 4 strings ring openx43200sits at fret 2, spans 2 frets, lets 2 strings ring open and mutes 1 stringx40233sits at fret 2, spans 2 frets, lets 1 string ring open and mutes 1 stringx43230sits at fret 2, spans 2 frets, lets 1 string ring open and mutes 1 string
Keys Bm7b5 belongs to
Bm7b5 is diatonic to 8 of the 96 keys this app knows, playing a different role in each.