The pentatonic scale is incredibly powerful, due to the fact that every note in the scale works fine over top of every chord in the key. It’s probably the most common starting point for guitar soloists, but we can spiff it up a bit by adding in the “blue” note, otherwise known as the flatted fifth.
In the diagram below you can see the basic box 1 pattern, with the flatted fifths added in red.
For more information, make sure you download the PDF.