The most unpleasant approach by Aronian, taking into consideration the match situation. The blocked nature of the position allows him a chance to develop pressure without too much risk.
1. d2d4  1... d7d5  2. c2c4  2... e7e6  3. g1f3  3... c7c6  4. e2e3  4... f8d6  5. b1c3  5... f7f5 In a must-win situation Giri chooses the Stonewall. 6. f3e5  6... g8f6  7. f1e2  7... e8g8  8. e1g1  8... c8d7 Giri chooses to maneuver his bishop on the kingside, the most aggressive option.