Learn › Badd9 Chord on Piano (B Add 9)
New Released in April 2026
Badd9 Chord on Piano (B Add 9)
To play the Badd9 chord on the piano, press B, D#, F# and C#. It is the major triad B plus the 9th, C#, with no seventh in between. Its sound: wide and shiny, a major chord with a ring on top.
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 Badd9
Every chord is a recipe of scale steps. For Badd9 the recipe is 1 3 5 9, counted from B.
Start chord: B
| Note | Step | Interval | Keys from B |
|---|---|---|---|
| B | 1 | root | 0 |
| D# | 3 | major 3rd | 4 |
| F# | 5 | perfect 5th | 7 |
| C# | 9 | major 9th | 14 |
Badd9 in every position
Learn them in pairs: root position first, then the one that keeps the most notes still.
Root position: B C# D# F#
1st inversion: D# F# B C#
2nd inversion: F# B C# D#
Hands and fingers
| Right hand | B C# D# F# | 1 2 3 5 |
|---|---|---|
| Left hand | B C# D# F# | 5 4 3 1 |
The chord hiding inside Badd9
Take Bsus2 (B C# F#) and add the third D#: you have Badd9. That is why Badd9 still sounds major, while Bsus2 does not.
Keys and moves for Badd9
- Badd9 fits wherever B fits: B major, F# major and E major.
- Pop and worship songs use it in place of plain B to make a simple progression sound fuller.
How Badd9 differs from the chords around it
One or two notes change the whole colour. Click a chord to open its page.
Make Badd9 automatic
- Say the notes out loud while you press them: B, D#, F# and C#.
- Switch between B and Badd9 ten times without looking at your hand.
- Try Badd9 in 1st inversion, the position that sits closest to your last chord.
- Last, meet Badd9 mixed with chords you already know, in an order you did not plan.
Keep each session short and frequent and Badd9 will become automatic.
Train Badd9 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. Add9 chords come in the level "Sixth & Add Chords".
Play the demoCommon questions
What notes are in the Badd9 chord?
Badd9 has 4 notes: B, D#, F# and C#. Formula 1 3 5 9.
Is Badd9 the same as Bsus2?
No. Bsus2 has no third, Badd9 adds D#, and that one note makes Badd9 sound major.
Where is Badd9 used?
Badd9 fits wherever B fits: B major, F# major and E major. Pop and worship songs use it in place of plain B to make a simple progression sound fuller.
Can I practise Badd9 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# 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.
Try the demoKeep learning
Piano Chord Chart: Every Chord in All 12 Keys
Piano chord chart with the notes of 288 chords: major, minor, 7ths, 9ths, sus and more in all 12 keys. Click a…
Extended Chords: 9ths, 11ths, 13ths
How 9th, 11th and 13th chords are built, what to leave out, and a game that drills every extension on your MID…
B9 Chord on Piano (B Dominant 9th)
B9 chord on piano: notes B D# F# A C#, formula 1 3 5 b7 9, fingering, D#m7b5 and where it is used.…
Bmaj9 Chord on Piano (B Major 9th)
How to play the Bmaj9 chord (B major 9th) on piano: B D# F# A# C#, rootless voicings, fingering and the keys i…
Bm9 Chord on Piano (B Minor 9th)
The B minor 9th chord Bm9 on piano: B D F# A C#, built from Bm7, compared with nearby chords.…
Chord Training That Feels Like a Game
Interactive chord training in your browser. Play major, minor, 7th and extended chords on a MIDI keyboard or a…