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F diminished chord for guitar (Fdim)

Diagram, fingering, and theory for the F diminished chord (Fdim) on guitar: F · G# · B.

Root
Chord
DiagramFdim
1×1321
Stacked thirds
1
3m
♭5
Theory
Formula1-♭3-♭5
DifferenceBoth 3rd and 5th lowered (♭3, ♭5).
SoundTense, unstable, wants to resolve.
Functionvii°, a passing chord.
UseBrief tension before a resolution.

F diminished

The F diminished chord (Fdim) is made up of: F · G# · B.

Brief tension before a resolution.