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B Diminished Chord
The B Diminished Chord is B, D, and F, all white keys. The notes are close together, the shape is compact, and the sound is tense, leaning toward C. With every note on a white key, it's a good chord for hearing what a diminished sound is before adding any black keys.
How to play the B Diminished Chord on the piano
Let’s go through some charts that will familiarize you with the B Diminished Chord and how to play it in the various forms you will encounter in pieces of music. First, we’ll look at the fundamental chord and its inversions; then, we’ll explore some more complex voicings.
The B Diminished Chord in root position
In root position, the notes of the B diminished chord are stacked in thirds with B on the bottom. The appearance on the staff is evenly spaced, as is the feeling of the space in between your fingers while playing.
| B Diminished Chord in root position | |
|---|---|
| Note Order | B D F |
| Left Hand Fingering | 5 3 1 |
| Right Hand Fingering | 1 3 5 |
| Chord Symbol | Bdim or B° |
The B Diminished Chord in first inversion
In first inversion, the third of the chord (D) becomes the bottom note, and the root (B) jumps up to the top.
| B Diminished Chord in 1st inversion | |
|---|---|
| Note Order | D F B |
| Left Hand Fingering | 5 3 1 |
| Right Hand Fingering | 1 2 5 |
| Chord Symbol | B°6 or B°/D |
The B Diminished Chord in second inversion
In second inversion, the fifth of the chord (F) is on the bottom, and the third of the chord (D) goes to the top.
| B Diminished Chord in 2nd inversion | |
|---|---|
| Note Order | F B D |
| Left Hand Fingering | 5 2 1 |
| Right Hand Fingering | 1 3 5 |
| Chord Symbol | B°6/4 or B°/F |
B Diminished Chord theory and function
A diminished chord stacks two minor thirds, and the result is tense and unsettled. It is never a place to rest. It behaves like a dominant 7th chord with the root missing, so it wants to move.
The B diminished chord is the leading-tone chord (vii°) in C major. In minor keys, it is the leading-tone chord (vii°) in C minor and the supertonic (ii°) in A minor.
The notes B, D, and F are the top three notes of G7, so the chord leads to C the way G7 does. A common use is as a passing chord over a rising bass line, I – vii°6 – I6: C – B°/D – C/E, so the bass walks C, D, E. Try playing B° and then C and listen to how the tension settles.
Other chords built on B
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