Guitar chords in the key of G:
Chord G7-9 (4th fret) notes: G, B, F and Ab. You must leave out the 6th and 5th strings.
This chord is played by placing a barre on fret four with your index finger.
G7-9 (G dominant 7th flat 9th) guitar chord's alternative names: G7b9, Gdom7b9, Gdom7-9.
1(G), 3(B), 5(D), b7(F), b9(G#/Ab).