B7 chord inversions
B7/D#, B7/F# and B7/A are the first, second and third inversions of the B7. This means that the bass tone is shifting from B to D sharp, F sharp or A.
B7/D#
B7/F#
B7/A
Theory and information
All these chords consist of the notes B, D#, F#, A. The difference is that the order of notes shifts. D# is the bass note in the first inversion, F# is the bass note in the second inversion and A is the bass note in the third inversion.
Alternative fingerings
B7/F# can also be played as 201202. B7/F# can also be played as 201202. A fingerpicking option for B7/A is X0X442.
Movable shapes
Versions with movable barre shapes:
B7/D#: 11 12 13 11 12 11
B7/F#: 224242
Alternative chord names
B7/D# is identical with B7/Eb.
B7/F# is identical with B7/Gb.
B7/A is identical with B/A.
Try in a chord progression
Em - B7/D# - D