Banjo Fm chord (Open G)F minor on the 5-string banjo: 3 1 1 3, and 1 more shape

Frets, string 4 to string 1: 3 1 1 3 (first position)

1. String 4 (D): 3rd fret, ring finger, F
2. String 3 (G): 1st fret, index finger (barre), A♭
3. String 2 (B): 1st fret, index finger (barre), C
4. String 1 (D): 3rd fret, little finger, F
5. String 5, the short g: open, G, not in the chord

Sounds: F A♭ C F  ·  Fm is F, A♭, C (1 · ♭3 · 5)

Found in: C minor (iv), E♭ major (ii), D♭ major (iii), A♭ major (vi), B♭ mixolydian (v), E♭ mixolydian (ii)

The 5th string: the short g rubs against the A♭ in this shape, a semitone away: some players let it ring, some skip it.

Up the neck: D minor shape: 6 5 6 6 (5fr); Barre minor shape: 10 10 9 10 (9fr); F minor shape: 15 13 13 15 (13fr). Slide a shape up or down to play another chord of its kind.

With a capo: on the 3rd fret it’s 0 2 3 3 (frets counted from the capo), an open Dm shape. Spike the 5th string at the 8th fret to keep it in tune with the capo.

Open G tuning: gDGBD, the short 5th string first, then strings 4 to 1.