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

How to play the F# aug/B chord
- Play B as the lowest bass note in the left hand
- Find F# (Root) on the piano keyboard
- Add A# (Major third) — 4 semitones above F#
- Add D (Minor sixth) — 8 semitones above F#
- Press all 4 notes simultaneously to sound the F# aug/B chord