Bdim
Bdim is the b diminished chord, spelled B – D – F. tense and unstable by design — built from stacked minor thirds, it begs to resolve.
The keys
B – D – F
Practise this chord
Plug in your MIDI keyboard and let Coach Tshepho drill you on Bdim — it plays the chord, names any wrong notes as you play, and moves you on when you nail it.
Create your free account →What's inside Bdim
| Note | Interval from root | Degree |
|---|---|---|
| B | Root | 1 |
| D | Minor 3rd | b3 |
| F | Diminished 5th | b5 |
Inversions
| Position | Keys (low → high) |
|---|---|
| Root position | B4 – D5 – F5 |
| 1st inversion | D5 – F5 – B5 |
| 2nd inversion | F5 – B5 – D6 |
A working voicing
Split the chord between two hands the way working players do — a solid shell low down, the colour tones up top:
| Hand | Keys |
|---|---|
| Left (shell) | B2 – B3 |
| Right (colour) | D5 – F5 |
Where Bdim lives
As the I chord
Bdim → E → G♭ → Bdim
The classic I–IV–V–I motion with this chord as home.
In a ii–V–I
D♭m7 → G♭7 → Bdim
The strongest cadence in harmony, resolving onto this chord.
Put Bdim under your fingers
Hear every voicing, see the keys light up, and drill it in the interactive Chord & Voicing Lab.
Open the Chord & Voicing Lab →More B chords
B
Bm
Baug
Bsus2
Bsus4
B6
Bm6
B7
Bmaj7
Bm7
Bm7♭5
Bdim7
Bm(maj7)
B9
Bmaj9
Bm9
Badd9
B6/9
Bm11
B13
B7♭9
B7♯9
B7♯5Play it over a groove
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