F# Minor Ninth chord (F#m9) on the guitar fretboard
The F# Minor Ninth chord (F#m9) is made of F# (the root), A (minor third), C# (perfect fifth, optional), E (minor seventh) and G# (major ninth). The fretboard shows every one of them across the neck in standard tuning (E A D G B E), and plays them back so you can hear the chord.
The minor ninth is a minor seventh with a ninth stacked above, and the fifth is optional. Its notes repeat in several overlapping shapes on the neck. It sits between the minor seventh and the minor eleventh.