1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. d1c2  4... e8g8  5. a2a3  5... b4c3  6. c2c3  6... d7d5  7. g1f3  7... d5c4  8. c3c4  8... b7b6  9. h2h4  9... c8a6  10. c4c2  10... c7c5  11. d4c5  11... b6c5  12. h1h3 A novelty. The rook  enters the battle via the third rank, whereas the white king is OK to  castle by hand. 12... b8c6  13. c1g5  13... c6d4  14. f3d4  14... c5d4  15. a1d1  15... e6e5  16. h3f3  16... a6b7  17. g5f6  17... g7f6  18. f3g3  18... g8h8  19. e2e3  19... d8e7 Black's pawn structure has been  demolished, but White's king is not safe enough, and this obstructs Ding  in developing his advantage. 20. e3d4  20... e5d4  21. f1e2  21... b7e4  22. c2d2  22... d4d3 Nakamura is looking for clarification. 23. e2d3  23... e4d3  24. g3e3  24... e7b7  25. d2d3  25... b7g2  26. d3d4 The major-piece endgame  is obviously more pleasant for White, but it is again his king's safety  that obstructs him. 26... g2g1  27. e1e2  27... g1g6  28. e3f3  28... a8e8  29. e2f1  29... e8e6  30. f3g3  30... g6f5  31. d4g4 Ding decided to solve the problem of the king once and for all. 31... f5g4  32. g3g4  32... a7a5 Nakamura needs to trade his queenside weakness. 33. b2b4  33... a5b4  34. a3b4  34... f8b8  35. d1b1 The rook behind the pawn should be  sufficient for the win had the remaining rook pair been off the board.  However, with all the four rooks alive, Black should hold. 35... e6e5  36. f1g2  36... h7h5  37. g4c4  37... h8g7  38. g2f3  38... f6f5  39. f3f4  39... g7f6 An inaccuracy... 40. b1d1  ...which Ding failed to capitalize on. 40... b8b6  41. f2f3  41... e5b5  42. d1d4  42... b6b8  43. f4e3  43... b5b6  44. e3d3 The only  winning idea is to set one of the rooks free. 44... f6e6  45. d3c3  45... b6a6  46. c3b3  46... b8a8  47. b4b5  47... a6a1  48. c4c2 Now after a short tactical skirmish... 48... a1a3  49. b3b4  49... a3a4  50. b4c5  50... a8c8  51. c5b6  51... a4d4  52. c2c8  52... d4h4  53. b6a5 ...the final phase of the game begins when Black needs to determine  in which moment he should sacrifice his rook for the queenside passer to  enter a drawn endgame. 53... e6d7 Nakamura decided to lock down the  opponent's king instead, which should have also sufficed. 54. c8c5  54... h4h1  55. b5b6  55... h5h4  56. b6b7  56... h1a1  57. a5b6  57... a1b1  58. b6a7  58... b1a1 