E sixth/ninth chord
E6/9 chord for piano with keyboard diagram.
Explanation: The E sixth/ninth is a five note chord. Due to practical circumstances, however, the fifth (B) is often omitted and/or the chord is played inverted. The chord is abbreviated E6/9.
Theory: The E6/9 chord is constructed with a root, a major third, a perfect fifth, a major sixth and a major ninth.
Notes: E - G# - B - C# - F#