B major
The B major chord consists of the B (Perfect unison), D# (Major third) and F# (Perfect fifth) notes.

How to play the B major chord
- Find B (Root) on the piano keyboard
- Add D# (Major third) — 4 semitones above B
- Add F# (Perfect fifth) — 7 semitones above B
- Press all 3 notes simultaneously to sound the B major chord