The best move, according to the computer (even though I just wrote that what the machine thinks is not so important in a blitz game).
1. g1f3  1... d7d5  2. e2e3 Nakamura is faithful to his blitz repertoire. 2... c7c5  3. b2b3  3... b8c6  4. f1b5 This is a Nimzo-Indian played with White. These variations where you play a popular position with colors reversed are always confusing. It's usually difficult to know how good it is to have an extra move. The computer is not impressed with this setup for White, but this is a blitz game so what the computer thinks about the opening is not so important.