How to Improvise with Jazz Chords on guitar. Learn to play chord solos and chord backup. This method teaches you - Improvising with Chords. 175 Moveable Chord shapes, chord construction. The different types of chords and how to vary them. Common chord progressions, chord substitution ideas, chord backup (Comping). A dozen sample chord solos illustrate the principles of chord substitution and embellishment. Chord grids and a recording help you learn to jazz up a chord solo.