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

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