[%c_effect c5;square;c5;type;Inaccuracy;persistent;true]
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... g8f6  4. d2d3  4... h7h6  5. c2c3  5... d7d6  6. e1g1  6... g7g5 [%cal dg7g5][%c_arrow g7g5;keyPressed;none;from;g7;opacity;0.8;to;g5;persistent;false] With his opening choice, Nakamura shows he's coming for the win. This is an aggressive system that has become more or less popular in recent years but not so much in elite games. Naturally, this advance is risky, and it's no wonder that classical players don't play like this, but the computer and recent theory demonstrate that this move is completely viable. 7. b1d2  7... f8g7  8. c4b3  8... a7a5 This is a mysterious move to me, but it's the computer's first choice. I'd understand it better if it was a response against the expansion attempt with a4-a5, but White plays a4 now anyway. The Italian Opening, as you can see, is not very easy to master. 9. a2a4 One of the advantages for Black of having the pawns on a5-a4 is that after a d3-d4 advance, he can exchange pawns and place a knight on b4. 9... e8g8  10. d2c4  10... c8e6  11. f1e1  11... f8e8  12. h2h3  12... d8d7  13. c1d2 All of this has already been played before, albeit in a different order of moves. Both players were probably out of preparation by this point. 13... a8d8  14. d1c2  14... b7b6 A new move. 15. b3a2 [%c_effect a2;square;a2;type;Inaccuracy;persistent;true] I think the idea of this move is to set up b2-b4 at some point, but it seems a bit slow. 15... f6h5 A good move, getting ready to take the knight to f4. 16. c4e3  16... e6a2  17. a1a2  17... c6e7 [%c_effect e7;square;e7;type;Inaccuracy;persistent;true] This allows White to realize the advance b2-b4. 18. d3d4 [%c_effect d4;square;d4;type;Inaccuracy;persistent;true] 18... e5d4  19. c3d4  19... d6d5 [%c_effect d5;square;d5;type;GreatFind;persistent;true] Fighting for the center. 20. e4e5  20... d8c8 [%c_effect c8;square;c8;type;Inaccuracy;persistent;true] The players will exchange inaccuracies for a few moves, missing a positional detail showed by the computer: the knight has to go to f4 as fast as possible. 21. a2a3 [%c_effect a3;square;a3;type;Inaccuracy;persistent;true] 21... c7c5 [%c_effect c5;square;c5;type;Inaccuracy;keyPressed;undefined;persistent;true] 22. d4c5 [%c_effect c5;square;c5;type;Inaccuracy;keyPressed;undefined;persistent;true]