1. d2d4 "I pretty much spent the whole night looking at 1.e4..." (Nakamura)  1... f7f5 What else in a must-win situation?! 2. g1f3  2... g8f6  3. c2c4  3... g7g6  4. g2g3  4... f8g7  5. f1g2  5... e8g8  6. e1g1  6... d7d6  7. b1c3  7... b8c6  8. d4d5  8... c6a5  9. b2b3  9... c7c5  10. c1b2  10... a7a6  11. f3g5  11... a8b8  12. d1d3  12... d8e8  13. c3d1  13... b7b5 A glance at the position reveals that Black can be happy with  his opening choice. Not because he has the advantage; in fact Nakamura  thought that White is better. What is important here is that not a single  pawn has been traded yet and the tension is all over the place. An  important thing is that Nakamura has a lot of experience in the arising  positions, whereas Xiong plays 1.d4 less frequently. 14. d3d2  14... a5b7 This  knight might be a problem sometimes in the arising pawn structure but in  comparison to the KID Black has the f7 square available for it. 15. d1e3  15... b7d8  16. g5h3 A novelty. 16... c8d7  17. a1d1 Xiong solidified the center. 17... b5b4 However Nakamura fixed a potential weakness on the queenside. 18. d2c2  18... a6a5  19. h3f4  19... a5a4  20. h2h4  20... b8a8  21. c2b1  21... a8a6 Black's play is definitely easier. He is  threatening to open the a-file in a good moment, but may also play on the  kingside. At the same time it is difficult to say what does White do  concretely. 22. g2f3  22... e8f7  23. e3g2 "I am sure that White is fine (after  this move), but the the tides are turning very quickly." (Nakamura) 23... f6g4 Taking the good opportunity to secure some nice squares  for his pieces. White's dark-squared bishop is extremely important for the stability of the flank, but now it has to leave. 24. f3g4  24... f5g4  25. e2e4 In search for counterplay while e4-e5 is also on the  agenda. 25... g7b2  26. b1b2  26... f7g7 Now the a-file is secured for the  black major pieces. 27. b2g7  27... g8g7  28. e4e5 Just in time. Otherwise  Black will transfer his knight there, and maybe even further to f3. 28... d7f5  29. e5d6  29... e7d6  30. f1e1 Xiong also got a file for his rooks. 30... d8f7 Avoids the trap. 31. e1e7  31... g7f6  32. e7b7 White searches for counterplay on the queenside. 32... a4b3  33. a2b3  33... f8a8 