Interesting Play in the Petrov

Here is a game from the 2008 Russian Team Championship, GM Yemelin - GM Popov with full annotations and commentary:

This was quite an interesting game. First we saw white employ 4. Nc4 which is a rare choice in the Petrov defense but it is not a bad choice as the knight sits well on the e3 square. Then we saw white sacrifice the knight on e3 to start up a very strong mating attack against the black king which could not be met.

This is another example which shows that the game of chess is not just about material but rather other factors such as attacking can be more important than the material count.