Mandolin Dadd9 chordD added ninth: 2 2 5 2, and 5 more shapes

Frets, low course to high: 2 2 5 2 (from the 2nd fret) · Dadd9/A

1. G course: 2nd fret, index finger (barre), A
2. D course: 2nd fret, index finger (barre), E
3. A course: 5th fret, little finger, D
4. E course: 2nd fret, index finger (barre), F♯

Sounds: A E D F♯  ·  Dadd9 is D, F♯, A, E (1 · 3 · 5 · 9)

Open courses that ring: D, A and E are notes of Dadd9, so they can drone under it.

With a capo: on the 2nd fret it’s 0 0 3 0 (frets counted from the capo), an open Cadd9 shape.

Tuning GDAE: G D A E, low to high.