C 13 #9 chord — Open G
1 voicing · Open G
Tuning:DGDGBD
Open position
1 / 1
Chord tones
C
R
E
+4
G
+7
A#
+10
D#
+3
F
+5
A
+9
C 13 #9 in other tunings
13 #9 in other keys — Open G
C 13 #9 in Open G — video lessons
About C 13 #9 in Open G
The C 13 #9 chord contains the notes C, E, G, A#, D#, F, A. 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.