1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. d1c2 A must-win situation for Yu. He  needs to choose as complex lines as possible. 4... e8g8  5. e2e4  5... d7d5  6. e4e5  6... f6e4  7. a2a3  7... b4c3  8. b2c3  8... c7c5  9. c1b2  9... b8c6  10. f1d3  10... f7f5  11. g1e2 A novelty. White continues completing  his development, but at the expense of a pawn. 11... d5c4  12. d3e4  12... f5e4  13. e1g1  13... b7b5 Aronian decided to give back the pawn at once. 14. c2e4  14... c8b7  15. e4g4  15... d8d5  16. f2f3  16... a7a5 An excellent idea to generate queenside play,  even at expense of some material. 17. e2f4  17... f8f4 The point behind Aronian's play. There are so many  similarities of this sacrifice to the one that Aronian's great compatriot  Petrosian used in his game against Reshevsky in Zurich 1953. Again we have a blockade, again the rook is sacrificed for an anti-blocker, and once  more there is a poor bishop on b2. 18. g4f4  18... c5d4  19. c3d4  19... b5b4  20. a3b4  20... a5b4  21. a1a8  21... b7a8  22. f1c1 A sad necessity. Yu needs to part with his  light piece. 22... a8b7 Black knows that his opponent has no way of saving the bishop and improves the position of his own. 23. g1f2  23... c4c3  24. b2c3 The only move. Otherwise d4 drops and the position collapses. 24... b4c3  25. c1c3  25... h7h6 The end of the positional  combination that Aronian started on move sixteen. He is out of danger, but Yu keeps posing problems to his opponent. 26. h2h4  26... b7a6 Active play. Black  hopes to use the bishop in the attack against the white king, but the  bishop was close to perfect where it stood and this was not needed. 27. c3a3  27... d5b5  28. f2g3 Moving the king away from the annoying checks. 28... c6e7  29. g3h2  29... b5b6  30. h4h5  30... a6b7 