1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. f1b5  3... b8d7 A clear indicator that Black wants to keep as many pieces on the board and is ready for risky play. 4. b5a4  4... g8f6  5. e1g1  5... a7a6  6. c2c4  6... e7e6  7. b1c3  7... f8e7  8. d2d4  8... c5d4  9. f3d4 It all  transposed into a Hedgehog setup with a slightly weird-placed  light-squared white bishop. 9... e8g8  10. d1e2  10... d8c7  11. a4b3 More or less  necessary prophylaxis. 11... b7b6  12. c1e3 An obvious development and a novelty. 12... c8b7  13. f2f3  13... a8c8 Carlsen consistently prepares the Hedgehog d6-d5  and b6-b5 breaks in return. 14. a1c1  14... f8e8  15. f1d1  15... c7b8  16. b3a4 This is a positive side of the active placement of the bishop. It is normally safer  on f1, but can never show activity from there. Nakamura also frees the  road for his b-pawn. 16... c8c7 The c-file is weakened for a moment, and the world champion  puts pressure on it at once. 17. b2b4 Very consistent play by Nakamura. He already prepared a nice piece sacrifice. 17... e8c8  18. a4b3  18... b6b5 Carlsen is also very consistent, but this break is very risky. 19. c3b5 The point behind White's play. Nakamura wins a bit of  material and above all gains a nice mobile pawn chain on the queenside. 19... a6b5  20. d4b5  20... h7h5 Black definitely needs kingside counterplay  urgently. 21. a2a4 Nakamura decided that the speed of the pawns is more important  than the exchange. 21... h5h4  22. a4a5  22... h4h3 Now Carlsen definitely has enough counterplay. 23. c1a1  23... h3g2  24. b5c7  24... b8c7  25. b4b5  25... b7a8  26. d1b1 More preparation is needed. 26... d6d5 But this means that Carlsen will have time to open up the  center. Once the white kingside has been destroyed, this plan works great  for Black. 27. b5b6  27... c7e5  28. f3f4  28... e5c3  29. e2e1  29... c3d3 The queens should be kept.