White is winning. His rook can invade Black's position and he may create a passed pawn on the queenside.

Of course, you will think now, the position calls for this characteristic sacrifice, which so often occurs in open Sicilians.
Yet, remarkably, it was only in 2008 that this move came to the fore.

The wrong way to conquer the pawn on c6. 13...Qc7 is better. After 1 4.g5 Black can return the piece with 14...0-0.

15.c7! The refutation.

White is completely winning, which he did in the end.

“I feel this man had to be the World Champion and nothing would stop him. It was a foregone conclusion. His career took a rather roundabout course but everything was already mapped out!” — Vladimir Kramnik

For a change, here we see Black planting a colossal knight in the center. This is by far less common. Funnily enough, this example also features another structure than a Hedgehog or a Sicilian. The basis remains the same though: the e-file is opened while the white king is still in the middle. It was Karpov who introduced this concept (starting with 10...Re8) against Kortchnoi in the famous Baguio match.

13.exd4
Apparently, Leitao didn't know his classics. In a later game against Mecking, Leitao (just like Karpov) decided to refuse the sacrifice with 13.Qb1.