Chess Strategy (1800-2400) Mod Apk v1.0.0 Unlocked This chess program presents many instructive positions with 18 most important strategic themes such as Advantage in development, Advantage in space, Attack on the king, Attack on the queenside, Weak squares, Pawn structure, Open files and... http://www.apkformod.com/chess-strategy-1800-2400-mod-apk-v1-0-0-unlocked/