G maj13/D
The G maj13 chord consists of the G (Perfect unison), B (Major third), D (Perfect fifth), F# (Major seventh), A (Major ninth) and E (Major thirteenth) notes, with D as the bass note.

How to play the G maj13/D chord
- Play D as the lowest bass note in the left hand
- Find G (Root) on the piano keyboard
- Add B (Major third) — 4 semitones above G
- Add D (Perfect fifth) — 7 semitones above G
- Add F# (Major seventh) — 11 semitones above G
- Add A (Major ninth) — 14 semitones above G
- Add E (Major thirteenth) — 21 semitones above G
- Press all 7 notes simultaneously to sound the G maj13/D chord