This 12-bar blues keeps the first four bars on the I7, giving the opening a very settled feel and plenty of room for phrasing, melody, or solo development. It follows the expected move to IV7 in bars 5 and 6, then returns to I7 in bars 7 and 8, so the first two-thirds of the form are quite accessible and familiar. The main twist comes in the turnaround: bar 9 moves to V7♯9, and bar 10 adds a more unusual ♯V/♭VI7♯9 before dropping back to V7♯9, bringing a more tense, slightly gritty colour than a basic dominant turnaround. Bars 11 and 12 resolve back to I7 and stay there, so after the altered dominant movement, the form lands in a relatively spacious and stable way.