Watch the Gilmourish online guitar lesson by Jeff McErlain from Soloing the Changes
As we can see, and the point of this course, is how to outline the changes. The chord progression is in Bm (Aeolian) B-C#-D-E-F#-G-A. So, if you look you can see the minor pentatonic scale is just a minor scale without the half steps. The half steps can be problematic on certain chords and that's why the pentatonic scale is so ubiquitous, it's kinda hard to hit a bad note! But as we see here, those omitted notes can add a whole other dimension to the solo.