1. g1f3  1... d7d5  2. e2e3  2... g8f6  3. c2c4  3... e7e6  4. b2b3 This is usually Nakamura's weapon of choice in blitz and rapid events. 4... f8e7  5. c1b2  5... e8g8  6. g2g3 A funny move, as we are usually told that you should not combine e3 and g3 in the opening. But, to be honest, it does not make a huge difference in the evaluation of the position. Of course White can play more pragmatically with moves like 6.c3 or 6.Be2. Duda even tried the crazy 6.Rg1 followed by 7.g4 in a rapid event this year. Not something you should do, unless you are 2700+ and want to have fun in a dubious position. 6... b7b6  7. f1g2  7... c8b7  8. e1g1  8... c7c5  9. d1e2  9... d8c8  10. b1c3  10... f8d8  11. a1c1  11... b8c6  12. d2d3 Since the central exchange gives White no advantage, Nakamura decides to play this restrained move. But now Black can simplify the position. 12... d5d4  13. e3d4  13... c6d4 