B flat diminished piano chord (Bbdim)
Also written A#dim (A sharp diminished)
A diminished chord stacks two minor thirds: root, minor third, diminished fifth. Tense and unstable, it is mostly used as a passing chord.
On the keyboard
Root position
- Notes
- B♭ – D♭ – F♭
- Fingering (right hand)
- 1 – 3 – 5
1st inversion
- Notes
- D♭ – F♭ – B♭
- Fingering (right hand)
- 1 – 2 – 5
2nd inversion
- Notes
- F♭ – B♭ – D♭
- Fingering (right hand)
- 1 – 3 – 5
Chord notes
| Note | Interval |
|---|---|
| B♭ (B flat) | root |
| D♭ (D flat) | minor third |
| F♭ (F flat) | diminished fifth |
Formula: 1 – b3 – b5 · B♭ – D♭ – F♭
A progression with this chord
The diminished chord works as a passing chord to the chord a semitone above.