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

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