Before taking on e6 White provokes ...g7-g6 to soften up the opponent's dark squares.
7...Rxb2 8.hxg6 hxg6 9.Rxg6 Rxa2 10.Kf1 Rh8 11.Bg2 Ke7 12.Bxd5 Nxd5 13.Rxd5
By the threat of 2...Bd3 Black provokes c3-c4, which will soften up the d4 and b4 squares for his pieces.
2.b4 Bd3! 3.Qb3 c4 , fixing a weakness on c3 and transforming the bishop into a giant.
Now that the plan with ...Nc6-d4 isn't feasible, Black directs his attention to the e4-pawn.