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.

With Black having been forced into passivity, White slowly improves his position.

Winning the c7-square for the rook.