Play the 9♭5 chord on guitar
The 9♭5 chord is a ninth chord with a diminished fifth. This combination enriches the tritone tension with harmonic extension.
Chord composition
| I | III | ♭V | ♭VII | IX |
| Root | Major third | Diminished fifth | Minor seventh | Major ninth |
| 0 | 4 | 6 | 10 | 14 |
Formula 1 - 3 - ♭5 - ♭7 - 9
Theory
The 9♭5 chord combines the 7♭5 with a major ninth. C9♭5 = C-E-G♭-B♭-D. The diminished fifth reinforces the tritone while the ninth adds color. This chord is used as enriched tritone substitution in jazz II-V-I progressions.
Play the 9♭5 chord on the guitar
