B#m7b5 is a half-diminished, spelled B#, D#, F# and A#. In Open G tuning (D2 G2 D3 G3 B3 D4) the easiest shape is x5434x, which sits at fret 3, spans 2 frets and mutes 2 strings. 12 positions for it are shown below, from the nut up to fret 13.
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.
x5434xsits at fret 3, spans 2 frets and mutes 2 strings131311sits at fret 1 and needs a barre across 6 strings at fret 1x5887xsits at fret 5, spans 3 frets and mutes 2 strings108811118sits at fret 8 and needs a barre across 5 strings at fret 8xx10878sits at fret 7, spans 3 frets and mutes 2 stringsx54548sits at fret 4, needs a barre across 3 strings at fret 4 and mutes 1 stringxx10111113sits at fret 10, spans 3 frets and mutes 2 strings131513151313sits at fret 13 and needs a barre across 6 strings at fret 13x11131513xsits at fret 11, spans 4 frets and mutes 2 stringsx31311sits at fret 1, needs a barre across 4 strings at fret 1 and mutes 1 string13131xsits at fret 1, needs a barre across 5 strings at fret 1 and mutes 1 string131314sits at fret 1 and needs a barre across 5 strings at fret 1
Keys B#m7b5 belongs to
B#m7b5 is diatonic to 8 of the 96 keys this app knows, playing a different role in each.