The tritone substitution, the substitution of II7 for V7, and the III–VI–II–V extension can be combined in different permutations to produce many different variations on the same basic progression—e.g.
A range of harmonic strategies can be used to create multiple renditions of a familiar progression, including the tritone substitution, II7 for V7, and III–VI–II–V expansion, which can be reorganized in different ways to produce distinct interpretations.