By exploiting a simple tactical detail White manages to seize the c-file.

After 1...Nb8 2.Rxc8+ Qxc8 3.Rc1 White is also much better.

2...Qxc6?? 3.b5 +-

Thanks to his strong passed pawn White is clearly better.

Preparing the doubling of rooks on the d-file.

Intending ...Nb6-c4(a4) in order to improve the knight.

Now the black queen manages to enter the enemy camp.

7.b3 was better.

Winning a pawn with a decisive advantage.