Chess Middlegame II v0.9.7 Mod APK Unlocked course composed by GM Alexander Kalinin is aimed at teaching a student much of the middlegame methods and intricacies through a theoretical section.
The following openings are viewed: Sicilian defense (Dragon, Najdorf, Paulsen variations), Ruy ... http://www.fullapkmod.com/chess-middlegame-ii-v0-9-7-mod-apk-unlocked.html