Well the basic chord I play are D minor
A7 G minor7 and Bb13.
I think BB king has an easier version you may wish to look an listen too.
whole chords are used in solo's.
I am guessing you want the chord to the song.
The use of chords in solo is common in the mixolydian part of soloing a great deal and it is common in this style of music.
The Dm I would think Dorian and A7 mixo, the Gmin parallel minor ,
the Bb13 paralysis analysis an I fear system failure is about to happen.