SOLOING: harmonic minor
This is the harmonic minor Scale. You can see it as natural minor with a raised 7th.
The names of the fingerings show the position of its root - which is marked on every fretboard diagram. "2A" means that the root of this fingering is on the A-string with your 2. finger.
This Scale is used in Metal, Pop and Jazz and has kind of a oriental sound to it. have fun!
Harmonic Minor
The example shows all fingerings in the key of C harmonic minor.