Aronian prepares against the nasty Be3-g5 maneuver. 
1. d2d4  1... g8f6  2. g1f3  2... d7d5  3. c1f4  3... c7c5  4. e2e3  4... b8c6  5. b1d2  5... c5d4  6. e3d4  6... d8b6  7. d2b3  7... c8g4  8. a2a4  8... a7a6 A novelty, which prevents the white a-pawn from  going too far. 9. a4a5  9... b6a7  10. c2c3  10... e7e6  11. f1e2  11... f6h5  12. f4e3  12... a7b8  13. h2h3  13... g4f3  14. e2f3  14... h5f6  15. f3e2  15... f8d6  16. e2d3  16... e8g8  17. e1g1  17... b8c7  18. f1e1 The  opening phase is over, and a typical Carlsbad pawn structure arose. The  plans are clear: White needs to attack on the kingside with his pieces,  whereas Black ideally should react with a minority attack on the opposite  wing. Carlsen, however, seems better prepared for the execution of his  plan.