F#dim is a diminished, spelled F#, A and C. In Open G tuning (D2 G2 D3 G3 B3 D4) the easiest shape is xx4214, which sits at fret 1, spans 3 frets and mutes 2 strings. 12 positions for it are shown below, from the nut up to fret 10.
Notes and intervals
Note
F#
A
C
Interval
1P
3m
5d
12 ways to play it
Ordered by how hard they are to fret, easiest first, one per position on the neck. Fret numbers are relative to the position marked beside each grid.
xx4214sits at fret 1, spans 3 frets and mutes 2 strings4242xxsits at fret 2, needs a barre across 3 strings at fret 2 and mutes 2 stringsx1110111010sits at fret 10, needs a barre across 4 strings at fret 10 and mutes 1 stringxx4577sits at fret 4, spans 3 frets and mutes 2 stringsx57577sits at fret 5, needs a barre across 3 strings at fret 5 and mutes 1 stringx11711710sits at fret 7, needs a barre across 3 strings at fret 7 and mutes 1 string424xxxsits at fret 2, spans 2 frets and mutes 3 strings4245xxsits at fret 2, spans 3 frets and mutes 2 strings4542xxsits at fret 2, spans 3 frets and mutes 2 stringsxx421xsits at fret 1, spans 3 frets and mutes 3 strings4575xxsits at fret 4, spans 3 frets and mutes 2 stringsx11101110xsits at fret 10, needs a barre across 3 strings at fret 10 and mutes 2 strings
Keys F#dim belongs to
F#dim is diatonic to 8 of the 96 keys this app knows, playing a different role in each.