Dominguez seizes his chance. At the top-level these are  sacrifices which people do "by-the-hand," without much thinking. With the  kingside weakened, and the lack of another defender on the dark squares,  the attack runs by itself.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6  4. d2d3 The Anti-Berlin looks like a better  choice for blitz. 4... f8c5  5. b5c6  5... d7c6  6. b1d2  6... c8e6  7. e1g1  7... c5d6  8. d2b3  8... a7a5 Aronian tries to improve on the play of Dominguez. 9. d1e1 White finds a good idea. 9... a5a4  10. b3a5  10... d8b8  11. b2b4 The point behind White's idea. Not only the knight is defended,  but the bishop will get a chance to be developed on the long diagonal. 11... e6g4  12. f3h4  12... e8g8  13. a5c4  13... g4e6 It seems as Aronian has managed to equalize  confortably, but the next strong move reveals he still has problems: 14. c4d6 In the opposite-colored bishop middlegame White can develop the  initiative on the color of his "extra" bishop. 14... c7d6  15. f2f4  15... e5f4 The only move. 16. c1f4  16... f8e8  17. a2a3  17... f6h5  18. f4d2  18... d6d5 Otherwise White will quickly build pressure on the kingside. 19. e1e2  19... h5f6 