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

How to play the F Petrushka chord/D# chord
- Play D# as the lowest bass note in the left hand
- Find F (Root) on the piano keyboard
- Add F# (Minor second) — 1 semitone above F
- Add A (Major third) — 4 semitones above F
- Add B (Diminished fifth) — 6 semitones above F
- Add C (Perfect fifth) — 7 semitones above F
- Add D# (Minor seventh) — 10 semitones above F
- Press all 7 notes simultaneously to sound the F Petrushka chord/D# chord