Five extended chords to take your playing to the next level.
https://www.guitarworld.com/lessons/chords/extended-chords-vocabulary-lesson
'These minor 9th and 11th chord examples are extended chords, which means they go beyond the initial Root-3rd-5th of the scale. Those named Em9 add both a b7th (D) and a 9th (F#) to the minor triad, giving us Root-b3rd-5th-b7th-9th (E-G‑B‑D-F#).'
