The computer doesn't like Black's position too much, but Aronian was playing fast and surely knew all this, so it was a calculated risk.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. d1c2  4... e8g8  5. e2e4  5... c7c5 [%c_effect c5;square;c5;type;Interesting;persistent;true] A risky move. Black's most reputable move is 5...d5, with long forced lines that usually lead to a draw. Aronian is a very creative player, and sometimes he shows interesting and deep ideas in the opening. 6. e4e5  6... c5d4  7. a2a3 [%c_effect a3;square;a3;type;GreatFind;persistent;true] I played this position with White back in 1997, when I wasn't even a grandmaster. I remember spending hours one afternoon analyzing this position with my coach at the time, GM Gilberto Milos. 7... b4a5  8. e5f6  8... d4c3  9. b2b4  9... a5c7  10. f6g7 