B#m7b5 is a half-diminished, spelled B#, D#, F# and A#. In Standard tuning (E2 A2 D3 G3 B3 E4) the easiest shape is x31312, which sits at fret 1, needs a barre across 3 strings at fret 1 and mutes 1 string. 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.
x31312sits at fret 1, needs a barre across 3 strings at fret 1 and mutes 1 stringx3434xsits at fret 3, needs a barre across 3 strings at fret 3 and mutes 2 strings8988xxsits at fret 8, needs a barre across 4 strings at fret 8 and mutes 2 stringsxx10111111sits at fret 10, spans 1 fret and mutes 2 stringsxxx546sits at fret 4, spans 2 frets and mutes 3 strings8688xxsits at fret 6, spans 2 frets and mutes 2 stringsxx8878sits at fret 7, spans 1 fret and mutes 2 strings8685xxsits at fret 5, spans 3 frets and mutes 2 stringsx1513151314sits at fret 13, needs a barre across 3 strings at fret 13 and mutes 1 string111313111311sits at fret 11 and needs a barre across 6 strings at fret 11211312sits at fret 1 and needs a barre across 4 strings at fret 1x11312sits at fret 1, needs a barre across 4 strings at fret 1 and mutes 1 string
Keys B#m7b5 belongs to
B#m7b5 is diatonic to 8 of the 96 keys this app knows, playing a different role in each.