A 13 #9 chord — Open G
1 voicing · Open G
Tuning:DGDGBD
Fret 10 position
1 / 1
Chord tones
A
R
C#
+4
E
+7
G
+10
C
+3
D
+5
F#
+9
A 13 #9 in other tunings
13 #9 in other keys — Open G
A 13 #9 in Open G — video lessons
About A 13 #9 in Open G
The A 13 #9 chord contains the notes A, C#, E, G, C, D, F#. In Open G tuning (strings: D–G–D–G–B–D), the chord shapes differ from standard tuning because the open string pitches change. Open G tuning lets you play a G major chord across all open strings — widely used in blues and slide guitar. Diagrams above show all playable shapes in this tuning.