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 