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.

Black resigned

By means of some minor tactics Black manages to advance his pawn majority.

2.Bxf5? Qc6! 3.Kg2 Rf8 4.Bg4 Rf4! 5.Bh5 Raf8 with decisive gains.
2.Bxb7! Qxb7 3.Rad1 e4 4.Nd4 would have reduced his edge to some extent.