Horace Silver was always searching for new sounds and he often borrowed from other styles in this search (Bossa Nova - Song For My Father, Samba - Cape Verdean Blues).

In this tune he is looking for a different way to play the blues and finds a more "positive" sounding alternative based on a major 6 chord.

By adding a minor third passing note to the major 6 chord, he get the same effect that the #4 in the blues scale has on the minor pentatonic scale, and finds a more uplifting sound for his music.