Cdim7 chord on piano
C diminished 7th: C · E♭ · G♭ · B♭♭. It sounds maximum suspense — stacked minor 3rds that could resolve four different ways.
NotesC E♭ G♭ B♭♭
Built fromroot + minor 3rd + diminished 5th + diminished 7th
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On the keyboard
Fingering
Right hand, root position: C — finger 1 · E♭ — finger 2 · G♭ — finger 3 · B♭♭ — finger 5. (1 = thumb, 5 = little finger.)
Inversions
The same notes in a different order. Inversions are how players move between chords without jumping:
- RootC – E♭ – G♭ – B♭♭
- 1stE♭ – G♭ – B♭♭ – C
- 2ndG♭ – B♭♭ – C – E♭
- 3rdB♭♭ – C – E♭ – G♭