Like another Monk standard, "Epistrophy", it is notable for a chord sequence in which the root note moves by semitones. There is some disagreement about the chord progression and melody in the bridge. On many club dates and jam sessions, musicians play the bridge of the tune as it was transcribed in the original Real Book: G7 | G7 | Ab7 | Ab7 | A7 Bb7 | B7 Bb7 | A7 Ab7 | G7 C7 | This is how Miles Davis recorded the tune on his album Steamin'. The wide proliferation of the Real Book makes this progression the de facto standard for the bridge. The "New Real Book" shows alternate bridge chords: