Guitar chords in the key of E:
E F#m Abm A B C#m Ebdim

Chord E7+9 notes: E, B or (B), D, G#, D and Fx. (Fx is F double sharp or G).

The note B on the fifth string is not required, but can be played on the 2nd fret if needed. The guitar strings 6(E) and 4(D) are left open.

E7+9 (E dominant 7th sharp 9th) guitar chord's alternative names: E7#9, Edom7#9, Edom7+9, E7b10.

Steps: 1-3-5-b7-#9.
1(E), 3(G#/Ab), 5(B), b7(D), #9(Fx/G).