Greg Lloyd September 16, 2018 lessons, Intermediate Killer Chords from 'Killer Joe' the Dominant 7 (9) (13) Chord in all 12 Keys - By Greg Lloyd - FREE sheet music below Greg Lloyd September 16, 2018 lessons, Intermediate This lesson will show you how to play the dominant 7 (9) (13) chord in all 12 keys in 3 steps.All of this is written out note-for-note for you to download and play on the piano in this lesson's pdf cheat sheet.