1. c2c4  1... e7e5  2. b1c3  2... g8f6  3. g1f3  3... b8c6  4. e2e3  4... d7d5  5. c4d5  5... f6d5 The Sicilian Four  Knights reversed. 6. d1c2  6... d5b4  7. c2b1  7... f7f5  8. a2a3  8... b4d5  9. d2d3 It boiled down to the reversed Scheveningen now. A curious fact is  that both Carlsen and Nakamura have been shown the secrets of this opening by Garry Kasparov himself. 9... c8e6  10. f1e2  10... f8e7  11. e1g1  11... e8g8 All very  natural for both sides. 12. c3d5 This is needed to bring the b- pawn into motion. 12... e6d5  13. b2b4  13... a7a6  14. c1b2  14... e7d6 The bishop is more useful here than on f6. 15. e3e4  15... d5e6  16. b2c3  16... f5e4  17. d3e4  17... e6g4 Black equalized and as the world  champion needs a win only he needs to find out something creative at once.  18. b1a2 A good idea. 18... g8h8  19. f3e1 The point behind the previous check. Carlsen keeps his good pieces alive. 19... g4d7 So does Nakamura. 20. a1d1 