Bbdim is a diminished, spelled Bb, Db and Fb. In Open G tuning (D2 G2 D3 G3 B3 D4) the easiest shape is x32322, which sits at fret 2, needs a barre across 4 strings at fret 2 and mutes 1 string. 12 positions for it are shown below, from the nut up to fret 14.
Notes and intervals
Note
Bb
Db
Fb
Interval
1P
3m
5d
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.
x32322sits at fret 2, needs a barre across 4 strings at fret 2 and mutes 1 stringxx8658sits at fret 5, spans 3 frets and mutes 2 strings8686xxsits at fret 6, needs a barre across 3 strings at fret 6 and mutes 2 stringsx1514151414sits at fret 14, needs a barre across 4 strings at fret 14 and mutes 1 stringxx891111sits at fret 8, spans 3 frets and mutes 2 stringsx91191111sits at fret 9, needs a barre across 3 strings at fret 9 and mutes 1 stringx1511151114sits at fret 11, needs a barre across 3 strings at fret 11 and mutes 1 stringx3232xsits at fret 2, needs a barre across 3 strings at fret 2 and mutes 2 stringsxxx322sits at fret 2, needs a barre across 2 strings at fret 2 and mutes 3 strings232322sits at fret 2 and needs a barre across 6 strings at fret 223232xsits at fret 2, needs a barre across 5 strings at fret 2 and mutes 1 stringxx2322sits at fret 2, needs a barre across 4 strings at fret 2 and mutes 2 strings
Keys Bbdim belongs to
Bbdim is diatonic to 8 of the 96 keys this app knows, playing a different role in each.