4.cxb5 Nd5 5.Qe4 axb5 6.Bxb5 Nb3! 7.Rad1 Qa5 8.Bd3 Bg6 9.Qg4 Rfc8! 10.Bxg6
Forcing a queen exchange that will finish off White's counterplay and help the realization of the extra pawn.
In order to swap the active white queen, which will help Black neutralize the passed pawn on d7 and realize the extra pawn.