B minor/A
The B minor chord consists of the B (Perfect unison), D (Minor third) and F# (Perfect fifth) notes, with A as the bass note.

How to play the B minor/A chord
- Play A as the lowest bass note in the left hand
- Find B (Root) on the piano keyboard
- Add D (Minor third) — 3 semitones above B
- Add F# (Perfect fifth) — 7 semitones above B
- Press all 4 notes simultaneously to sound the B minor/A chord