A 9sus4 — Resonator Guitar

A 9sus4 stacks A – B – D – E – G, but no bar position on the Resonator Guitar's open G (GBDGBD) strings sounds that set: at every fret, and on every short slant a steel can hold, a tone the chord needs is missing or too few strings land on it.

A guitarist would reach for a fretted grip here. A squareneck has no fretting hand, so this page charts nothing rather than a shape no steel can play — the qualities this tuning does spell are on the A chord list, marked shape by shape.