1. g1f3  1... d7d5  2. e2e3  2... g8f6  3. c2c4  3... e7e6  4. b1c3  4... f8d6  5. d2d4  5... b7b6  6. c4d5 I don't like this move very much, as Black's development is easier after this exchange. 6... e6d5  7. f1d3  7... e8g8  8. c1d2 [%c_effect d2;square;d2;type;Inaccuracy;persistent;true] A strange move, as the bishop is not well developed here. It seems better to castle and then develop the bishop with b3-Bb2. 8... c7c5 This natural move is a novelty. 9. d4c5  9... b6c5  10. e1g1  10... b8c6 On the board we have a position with hanging pawns (this formation with the black pawns on d5 and c5), but in a very good version for Black. His pieces are free and active, while the same cannot be said for White's pieces. 11. h2h3 Nakamura decides to avoid Bg4. 11... h7h6 Erigaisi wants to develop the bishop to e6 and this move is useful to avoid Ng5. Something to consider is White's advance with e3-e4, a typical idea in these structures and that gives chances of equality—after all, Black is already a little better. Perhaps it would be more useful to put the rook on e8 first. 12. a1c1  12... c8e6  13. c3e2 