Fdim7 8-string guitar chord

How to play Fdim7 on 8-string guitar

The most common way, the first shape above: your index finger on the low E string at the 1st fret, your middle finger on the G string at the 1st fret and your ring finger on the high E string at the 1st fret. Let the D and high B strings ring open. Don’t play the F♯, low B and A strings.

From the F♯ string x x 1 x 0 1 0 1 (x: not played, 0: open)

What notes are in Fdim7?

Fdim7, F diminished seventh, is F, A♭, C♭ and E♭♭: the root (F), the minor third (A♭), the diminished fifth (C♭) and the diminished seventh (E♭♭). Its formula is 1 ♭3 ♭5 ♭♭7.

Why do four diminished seventh chords have the same notes?

A diminished seventh is minor thirds stacked all the way round, F, A♭, C♭ and E♭♭, so Fdim7 has the same notes as the diminished sevenths on A♭, C♭ and E♭♭. Any of its notes can be the root.