1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... f8e7 Nakamura trusts his QGD till the  end. Indeed, what is the use of the classical openings if we cannot use  them in the decisive games? 5. c1f4  5... e8g8  6. e2e3  6... b8d7  7. f1e2  7... d5c4  8. e1g1  8... a7a6  9. a2a4  9... f6d5  10. f4g3  10... c7c5 Simple play. Black enters an IQP structure with a  white bishop on the b8-h2 diagonal which many people believe not to be  optimal for White. 11. e2c4  11... c5d4  12. e3d4  12... d7b6  13. c4b3  13... a6a5 Indeed, the white pawn should not be allowed to get to the  a5 square. 14. f3e5  14... c8d7  15. c3e4  15... d7c6 Karpov's beloved maneuver which he successfully used in a  model again against his great rival Kortschnoi. 16. e5c6  16... b7c6  17. a1c1  True, in the aforementioned world championship game the dark-squared  bishops were already traded, just as a pair of knights too and Black was  already better at this point. Here, Carlsen can put pressure on both  sides. On the queenside there are weaknesses on a5 and c6, whereas White  can always try to mate the black king in IQP positions. 17... d5b4  18. d1e2  18... b6d5  19. f1d1 Overprotecting the d4 pawn and preparing Ne4-c5 at  a good moment. 19... f8e8 Also a useful, overprotective move. The e6  point could be quite sensitive in Black's setup. 20. e2f3  20... a8a7 Another useful, overprotective move. If a chance is given the rook will put pressure along the d-file. 21. g3e5  21... e7f8 This is what  Nakamura had in mind while maneuvering with the rooks. But as strangely as it sounds, it is a blunder! 22. f3g3 Played a tempo. 22... f7f6  23. e5d6 Carlsen skilfully softens the dark squares, thus  securing access to the a5 pawn for his rook. 23... f8d6  24. e4d6  24... e8f8  25. d6e4  25... d8b8  26. g3f3  26... f8e8  27. g2g3 Air for the white king, less room for the black queen. 27... g8h8 Nakamura decided to free himself of the e6 weakness. 28. e4c5  28... a7e7  29. b3c4 