Watch the Greeny online guitar lesson by Jeff McErlain from Essentials: Chord Tone Soloing
For "Greeny", I'm borrowing the feel and a few licks that are in the style of Peter Green from Fleetwood Mac. Chord tone soloing is essential when playing over a blues if you want to get into that sweet BB King style sound. As guitar players, our first go to scale this case would be A minor pentatonic, and that's fine! But, if you take a look at the A minor pentatonic scale, you can see that we're missing some key chord tones that show up in each of our chords. Of course, there's nothing wrong with just using the minor pentatonic scale, many fantastic guitar players have done this, and it's a stylistic choice. I'm not going to name any names. as inevitably someone will think I'm putting that guitar player down. As a player, I'm more attracted to the sound outlining some of, or if not all, of the chords. The more involved you get in outlining the chord sounds the jazzier it can sound. I use the term "jazzy" loosely - it'll sound a little more sophisticated than using a straight pentatonic scale. Nobody get your knickers in a twist! Both approaches are equally as important, but I'll say the chord tone soloing approach requires some more work.