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.