The diminished triad stacks two minor 3rds (1–♭3–♭5). Tense and unstable, it is often built on the 7th degree of a major key and pulls strongly back to the tonic.
NotesE · G · A♯
Formula1 · ♭3 · ♭5
Every diminished chord tone across the neck. Solo with these and you spell the chord — that's the difference between running a scale and playing the changes.
