Learn › Bm9 Chord on Piano (B Minor 9th)
New Released in April 2026
Bm9 Chord on Piano (B Minor 9th)
To play the Bm9 chord on the piano, press B, D, F#, A and C#. It is the minor seventh Bm7 plus the 9th, C#. Its sound: mellow and soulful, minor without sadness.
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
The formula of Bm9
Every chord is a recipe of scale steps. For Bm9 the recipe is 1 b3 5 b7 9, counted from B.
Start chord: Bm7
| Note | Step | Interval | Keys from B |
|---|---|---|---|
| B | 1 | root | 0 |
| D | b3 | minor 3rd | 3 |
| F# | 5 | perfect 5th | 7 |
| A | b7 | minor 7th | 10 |
| C# | 9 | major 9th | 14 |
Bm9 in every position
Learn them in pairs: root position first, then the one that keeps the most notes still.
Both hands: B A D F# C#
Rootless, 3rd on the bottom: D F# A C#
Rootless, 7th on the bottom: A C# D F#
Left hand alone: B A
Hands and fingers
| Left hand | B A | 5 1 |
|---|---|---|
| Right hand | D F# C# | 1 2 4 |
The chord hiding inside Bm9
The four upper notes of Bm9, D F# A C#, are Dmaj7. Play B low and Dmaj7 above it: that is the whole Bm9, and a quick way to reach it.
Keys and moves for Bm9
- Bm9 is the ii chord of A major and the vi chord of D major.
- In a ii-V-I it often opens the line: Bm9 → E7 → Amaj7.
How Bm9 differs from the chords around it
One or two notes change the whole colour. Click a chord to open its page.
Make Bm9 automatic
- Find B, then add the other notes one at a time: B, D, F#, A and C#.
- Play Bm7, then Bm9, then Bm7 again, and hear what the 9th adds to the minor seventh.
- Alternate root position and a rootless shape with the 3rd on the bottom, keeping shared notes still.
- Then test it in random order among other chords: recall under time pressure is what sticks.
Keep each session short and frequent and Bm9 will become automatic.
Train Bm9 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. Major and minor 9ths have their own level, "Ninth Chords".
Play the demoCommon questions
What notes are in the Bm9 chord?
Bm9 has 5 notes: B, D, F#, A and C#. Formula 1 b3 5 b7 9.
What is the difference between Bm9 and Bm7?
Bm7 is B D F# A. To get Bm9, add C# above the minor seventh.
Where is Bm9 used?
Bm9 is the ii chord of A major and the vi chord of D major. In a ii-V-I it often opens the line: Bm9 → E7 → Amaj7.
Can I practise Bm9 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 B, D, F#, A and C# 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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