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  13... f6e4  14. a2a3 [%c_effect a3;square;a3;type;Inaccuracy;persistent;true] Too slow. 14... d8b6  15. e2c3 [%c_effect c3;square;c3;type;Interesting;persistent;true] 15... e4d2 This is certainly not an easy decision, as keeping the knight on e4 is very tempting. 16. d1d2  16... c5c4 This advance is necessary because White was threatening 17.Na4. 17. d3b1 [%c_effect b1;square;b1;type;Inaccuracy;persistent;true] 17... f8d8  18. f1d1  18... a8b8 Now the position is very uncomfortable for White, who lacks space. It never hurts to remember and by now my most assiduous readers already know how I like it: Black has the pair of bishops. 19. c3a4  19... b6b7  20. b1c2  20... b7e7 [%c_effect e7;square;e7;type;GreatFind;persistent;true] I like this move, improving the queen's position. 21. c1b1  21... e7f6  22. d2e2  22... g7g6 [%c_effect g6;square;g6;type;GreatFind;persistent;true] Another good move. Black has a long-term positional advantage, so it's possible to calmly improve the position. 23. d1d2  23... g8g7  24. e2d1  24... d6c7 The game gets tactical now: the idea is to play /Ba5. Black could continue to suffocate White with a move like /a5 (useful to avoid a possible pawn advance to b4) and then follow up with a plan of attack on the king-flank with /h5-g5-g4. 25. a4c5  25... e6c8 [%c_effect c8;square;c8;type;Inaccuracy;persistent;true] 26. b2b4 [%c_effect b4;square;b4;type;Inaccuracy;persistent;true] 26... c6e5  27. f3e1 It's strange to choose this square instead of the more active d4. 27... f6d6  28. c5a4  28... a7a5 [%c_effect a5;square;a5;type;GreatFind;persistent;true] Creating weaknesses on the queenside. 29. b4b5 