D 13/F
The D 13 chord consists of the D (Perfect unison), F# (Major third), A (Perfect fifth), C (Minor seventh), E (Major ninth) and B (Major thirteenth) notes, with F as the bass note.

How to play the D 13/F chord
- Play F as the lowest bass note in the left hand
- Find D (Root) on the piano keyboard
- Add F# (Major third) — 4 semitones above D
- Add A (Perfect fifth) — 7 semitones above D
- Add C (Minor seventh) — 10 semitones above D
- Add E (Major ninth) — 14 semitones above D
- Add B (Major thirteenth) — 21 semitones above D
- Press all 7 notes simultaneously to sound the D 13/F chord