Progression
The Rhythm changes (A section) in B major
Rhythm changes (A section) in B major plays B, G#m7, C#m7 and F#7 — I, vi, ii and V — across 8 chords. The I–vi–ii–V harmonic backbone of the A section of 'rhythm changes', the jazz standard form built on Gershwin's 'I Got Rhythm'.
The chords, in order
1BI
2G#m7vi
3C#m7ii
4F#7V
5BI
6G#m7vi
7C#m7ii
8F#7V