Swapping the main defender of the black camp.

4...e4 was preferable, securing this pawn, when 5.Rad1 followed by f2-f3 keeps pressure.

With the strong plan of Bxc6 and Nc4, conquering the e5-pawn. The game continued:

Black resigned

Exploiting the motif of a back rank mate in order to seize the open file.

1...Rxc6?! 2.dxc6 Qc7 (2...Qxc6? 3.Qd8+ Bf8 4.Bh6 +-) 3.Qd7 +/-

Forcing the enemy bishop to leave the long diagonal.

2...Bxc3 3.Qxc3 Rxc6 4.dxc6+/-

Vacating c3 for the queen. Again Black can't take twice on c6 due to the check on d8.