Bdim 7-string guitar chord

How to play Bdim on 7-string guitar

The most common way, the first shape above: your index finger on the A string at the 2nd fret, your middle finger on the D string at the 3rd fret, your little finger on the G string at the 4th fret and your ring finger on the high B string at the 3rd fret. Don’t play the low B, low E and high E strings.

From the low B string x x 2 3 4 3 x (x: not played, 0: open)

What notes are in Bdim?

Bdim, B diminished, is B, D and F: the root (B), the minor third (D) and the diminished fifth (F). Its formula is 1 ♭3 ♭5.

What is the difference between Bdim, Bm7♭5 and Bdim7?

Bdim is three notes, B, D and F. Bm7♭5 adds the minor seventh, A; Bdim7 adds the diminished seventh, A♭, a half step lower.

Where does Bdim go?

Most often up a half step, to C: it is the chord on the seventh note of a major key, leading back to the tonic.

Keys with Bdim

Bdim is the vii° chord in C major and the ii° chord in A minor.