B7 is a dominant seventh, spelled B, D#, F# and A. In Open G tuning (D2 G2 D3 G3 B3 D4) the easiest shape is x4424x, which sits at fret 2, 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
5P
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.
x4424xsits at fret 2, spans 2 frets and mutes 2 stringsx41204sits at fret 1, spans 3 frets, lets 1 string ring open and mutes 1 string987877sits at fret 7 and needs a barre across 4 strings at fret 7x44447sits at fret 4, needs a barre across 4 strings at fret 4 and mutes 1 string989810xsits at fret 8, needs a barre across 3 strings at fret 8 and mutes 1 string131413140xsits at fret 13, needs a barre across 3 strings at fret 13, lets 1 string ring open and mutes 1 stringx111314013sits at fret 11, spans 3 frets, lets 1 string ring open and mutes 1 stringxx9111013sits at fret 9, spans 4 frets and mutes 2 stringsxx13141213sits at fret 12, spans 2 frets and mutes 2 stringsx44201sits at fret 1, spans 3 frets, lets 1 string ring open and mutes 1 string12120xsits at fret 1, needs a barre across 3 strings at fret 1, lets 1 string ring open and mutes 1 stringx2120xsits at fret 1, spans 1 fret, lets 1 string ring open and mutes 2 strings
Keys B7 belongs to
B7 is diatonic to 8 of the 96 keys this app knows, playing a different role in each.