Energetic play by Nakamura.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. c1g5  4... h7h6  5. g5h4 In a must-win situation Nakamura chooses a relatively rare approach. 5... d5c4  6. e2e3  6... c7c5  7. f1c4  7... c5d4  8. e3d4 Now a standart IQP appeared, with the white bishop already committed to the h4 square. 8... f8e7  9. e1g1  9... e8g8  10. b1c3 [#] 10... b7b6 This might be a bit slow. 11. d1e2 That is the difference. The pawn on d4 is not hanging and White can arrange his pieces in the most optimal way. 11... c8b7  12. a1d1 Very obvious and natural. 12... b8d7 Already a bit awkward. 13. f1e1  13... a8c8 A blunder! From here on, Mamedyarov's loss can be named after the e8 square! 14. d4d5 Right! Whenever this break works in the IQP, this spells trouble for the defender. Here his position simply falls apart. 14... e6d5 The lesser evil. 15. e2e7  15... d8e7  16. e1e7  16... d5c4 