|F Diminished chord intervals and notes|
|Intervals||1 - b3 - b5 - 6|
|Notes in F dim||F - G# (Ab) - B - D|
The diminished chord is a triad with two minor thirds, or a minor third and a diminished fifth, which gives us an unstable chord, which needs to be resolved to another chord.
F Diminished Chord Charts, Fingering, Voicings
Here are 6 voicings of the Fdim guitar chord, with a chord chart to each voicings' fingering.