Eb Half Diminished chord (Ebm7b5) on the guitar fretboard

The Eb Half Diminished chord (Ebm7b5) is made of Eb (the root), Gb (minor third), Bbb (diminished fifth) and Db (minor seventh). The fretboard shows every one of them across the neck in standard tuning (E A D G B E), and plays them back so you can hear the chord.

The half diminished chord is a diminished triad with a minor seventh, so it keeps the flat five of the diminished chord but not its seventh. It shares its notes with a minor sixth chord built a minor third higher, so the two shapes overlap on the neck. It sits between the minor seventh and the diminished seventh.