B maj11
The B maj11 chord consists of the B (Perfect unison), D# (Major third), F# (Perfect fifth), A# (Major seventh), C# (Major ninth) and E (Perfect eleventh) notes.

How to play the B maj11 chord
- Find B (Root) on the piano keyboard
- Add D# (Major third) — 4 semitones above B
- Add F# (Perfect fifth) — 7 semitones above B
- Add A# (Major seventh) — 11 semitones above B
- Add C# (Major ninth) — 14 semitones above B
- Add E (Perfect eleventh) — 17 semitones above B
- Press all 6 notes simultaneously to sound the B maj11 chord