1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... d5c4  5. e2e4  5... b7b5 A very fresh line which was tried on a couple of occasions by Caruana. Apparently Nakamura liked  the idea and decided to give it a try. 6. e4e5  6... f6d5  7. c3b5  7... d5b6  8. a2a3  8... b8c6  9. c1e3  9... c6a5 Played after some hesitation. The knight is  protecting the c4-pawn and is ready to jump on b3 at the right moment. 10. d1c2 The opening is over and Nakamura has a few weaknesses to worry  about. But the c4-pawn is also a strength that cramps the white bishop and secures an excellent outpost for the knight. 10... a7a6 Not only chases  the knight back home, but deprives the queen of the c3-square. 11. b5c3  11... f8e7  12. a1d1 Carlsen delays the development of his kingside. 12... c8b7  13. f1e2  13... d8d7  14. h2h4 The point! The rook is entering the  battle the French way. 14... b7c6 Logically, Nakamura is looking for a queenside play.