Popular fretboard positions with fingering suggestions
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Eo7 is the E diminished 7th guitar chord. It uses the notes E, G, B♭, and D♭ and the interval formula 1-♭3-♭5-♭♭7.
The E diminished 7th diminished 7th chord extends the diminished triad with a double-flatted seventh D♭, creating a haunting, symmetrical dissonance. Its ambiguous, tension-filled sound is ideal for dramatic resolutions, suspenseful scenes, or mysterious soundscapes in classical and cinematic compositions.
Also written as Edim7.
These are quick-start shapes for players who want the answer first and the deeper theory second.
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Each note below shows how the chord is built from its root. This is the theory layer underneath the fretboard shapes.
The root anchors the chord and defines its tonal center.
This note supplies the minor color and gives the chord its darker emotional pull.
The flattened fifth adds tension and a restless, unstable edge.
The diminished seventh heightens instability and gives the chord a tense symmetrical quality.
Every shape is shown with its diagram and exact fingering instructions.
Eo7 uses the notes E, G, B♭, and D♭. Its interval formula is 1-♭3-♭5-♭♭7.
Eo7 is also written as Edim7.
Place the 1st finger on the 1st fret of the 5th string. Place the 2nd finger on the 2nd fret of the 4th string. Place the 3rd finger on the 2nd fret of the 2nd string. Let the sixth, third, and first strings ring open. Strum from the 6th string down.
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