After 5...Bxc3?! 6.cxb7 Rad8 7.Rac1 , the passed pawn outweighs the slight material deficit.
After 7...Nd5 8.Bd4 Black is worse due to his queenside weaknesses, but now he loses a pawn.
White is also under strong pressure after 2.Nxf4 Nxd4 with the double threat of 3...Rxf4 and 3...Nef5.
A strong blow on the theme of deflection, which lets Black land a knight on f3.