This 12 Bar Blues combines major chords, sixth chords and seventh chords. When changing from the sixth chord to the seventh chord, the little finger utilizes the sliding technique introduced in Lesson 3. This technique is essential to make the sixth to seventh chord changes sound smooth.
Rhythm Pattern
Except for the two bars of B7, you are changing chords on every beat (i.e., 4 chord changes per bar). This will be difficult, so use an easy rhythm; e.g.: