F#dim7 chord on guitar

The F# diminished 7th chord, written F#dim7, has 4 notes: F# A C D#. The root F# is also written Gb, so Gbdim7 is the same chord.

F#dim7○21314
201212
F#dim7123141
234242

As tab, thick low E string first: 201212, 234242. Numbers in the dots are fingers: 1 index, 2 middle, 3 ring, 4 little, T thumb. × marks a muted string and ○ an open one.

NotesF# A C D#
Formula1 b3 b5 6
IntervalsRoot, Minor 3rd, Tritone, Major 6th

About the Diminished 7th Chord

A diminished 7th chord stacks three minor thirds, a symmetric, tense chord that can resolve in four directions. More about the Diminished 7th Chord.

Diminished 7th Chord in other keys