Learn › G9 Chord on Piano (G Dominant 9th)
New Released in April 2026
G9 Chord on Piano (G Dominant 9th)
G9, the G dominant 9th chord, is the dominant seventh G7 plus the 9th, A. Its notes on the piano are G, B, D, F and A. Expect a sound that is full and bluesy-bright, tension that still sounds smooth.
No account, no download. The demo has limited content. Advanced features are in ChordRunner Premium.
- MIDI keyboard
- Digital or acoustic piano
- Guitar
- Computer, phone or tablet
How G9 is built
Start from G7, which you may already know, and change one thing: add A above the seventh.
Start chord: G7
| Note | Step | Interval | Keys from G |
|---|---|---|---|
| G | 1 | root | 0 |
| B | 3 | major 3rd | 4 |
| D | 5 | perfect 5th | 7 |
| F | b7 | minor 7th | 10 |
| A | 9 | major 9th | 14 |
G9 in every position
Each picture is still G9. Move only the notes that must move.
Both hands: G F B D A
Rootless, 3rd on the bottom: B D F A
Rootless, 7th on the bottom: F A B D
Left hand alone: G F
Fingering
| Left hand | G F | 5 1 |
|---|---|---|
| Right hand | B D A | 1 2 4 |
The chord hiding inside G9
Above the root G sit four notes that form Bm7b5: B D F A. A pianist can play G with the left hand and Bm7b5 with the right, and the result is G9.
When to play G9
- G9 is the V chord of C major: it pulls home to C.
- Many pianists play G9 whenever G7 appears, because the 9th makes the same pull sound richer.
Make G9 automatic
- Say the notes out loud while you press them: G, B, D, F and A.
- Play G7, then G9, then G7 again, and hear what the 9th adds to the seventh.
- Try G9 in a rootless shape with the 3rd on the bottom, the position that sits closest to your last chord.
- Last, meet G9 mixed with chords you already know, in an order you did not plan.
Five minutes a day is enough to make G9 feel easy.
Train G9 with ChordRunner
ChordRunner shows a chord symbol and you play it on a MIDI keyboard, a real piano through the microphone or the on-screen keys. Dominant 9ths appear in the later boss challenges, next to major and minor 9ths.
Play the demoCommon questions
How do you play G9 on the piano?
Press G, B, D, F and A together. Left hand plays G F (fingers 5 and 1), right hand B D A (1, 2, 4).
What is the difference between G9 and G7?
G7 is G B D F. To get G9, add A above the seventh.
Where is G9 used?
G9 is the V chord of C major: it pulls home to C. Many pianists play G9 whenever G7 appears, because the 9th makes the same pull sound richer.
Can I practise G9 with a MIDI keyboard or a real piano?
Yes. In ChordRunner a USB MIDI keyboard is detected automatically, and an acoustic or digital piano works through the microphone. The game checks that G, B, D, F and A sound together.
Your instrument is the controller.
ChordRunner is a browser game that teaches piano and guitar chords: a chord appears on screen, you play it on a real instrument, and your runner jumps. MIDI keyboard or microphone, both work.
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