E 6/D
The E 6 chord consists of the E (Perfect unison), G# (Major third), B (Perfect fifth) and C# (Major sixth) notes, with D as the bass note.

How to play the E 6/D chord
- Play D as the lowest bass note in the left hand
- Find E (Root) on the piano keyboard
- Add G# (Major third) — 4 semitones above E
- Add B (Perfect fifth) — 7 semitones above E
- Add C# (Major sixth) — 9 semitones above E
- Press all 5 notes simultaneously to sound the E 6/D chord