D9 is a bit of a finger stretcher and we start with the tip of our index finger on the second fret of the E string. Next the middle finger goes on the fourth fret of the C string. Finally, the ring finger plays the fifth fret of the G string and the pinky plays the fifth fret of the A string. This puts our hand in an awkward position especially the middle and ring at the top. Use as little finger flesh as possible to fret the string so you can give yourself as much space as possible.
Type : Extended (dominant ninth)
Intervals :D (T), Gb (3M), A (5J), C (7m), E (9M),
We ignored 1 less important note(s) to be able to form the chord.