Standard
C♯ major second dyad · Frets 4–6
Two notes: the first in its name is the lower
C♯ major second dyad · Frets 4–6
B♭ quartal chord, four notes · also B♭m7(add11), no 5th · Fret 6
E♭ minor seventh dyad · Fret 6
E♭ quartal chord, three notes · also E♭7sus4 (no 5th) · Fret 6