1. d2d4  1... g8f6  2. c2c4  2... g7g6  3. b1c3  3... d7d5 The Grunfeld Defense has a deserved reputation as a reliable opening. 4. g1f3  4... f8g7  5. c1g5  5... f6e4  6. g5f4 A modern line. 6... e4c3  7. b2c3  7... c7c5  8. e2e3  8... d8a5  9. d1d2  9... c5d4  10. c3d4  10... a5d2  11. e1d2 Technically speaking, the trade of queens should be favorable for the second player. On the one hand she reduces the space deficit, while on the other—Black can dream about a favorable endgame, with a distant passer to appear on the queenside. 11... d5c4  12. f1c4 But there is a catch—the white pieces are too active and Gunina can pressurize her opponent along the open c-file, as well as the half-open b-file. White can also consider the advance of her a-pawn in order to get rid of a weakness, while creating one for her opponent. And this is not everything. 12... e8g8 [#] 13. h2h4 [%c_effect h4;square;h4;type;GreatFind;persistent;true] That is also a problem for Muzychuk, that her kingside can be attacked too. 13... b8c6  14. h4h5  14... c6a5  15. c4d3  15... c8e6  16. h5h6 [%c_effect h6;square;h6;type;GreatFind;persistent;true] Squeezing the bishop. 16... g7f6  17. f3g5 But this is inaccurate. 17... e6c4 Muzychuk misses her chance $1 18. g5e4 [%c_effect e4;square;e4;type;GreatFind;persistent;true] There won't be a second chance. 18... f6h8  19. f4c7 [%c_effect c7;square;c7;type;GreatFind;persistent;true] The key maneuver again $1 19... c4d3  20. d2d3  20... a5c6  21. a1b1  21... f7f5  22. e4c5  22... b7b6  23. c5e6 The white pieces have occupied important outposts and Gunina has a large advantage. 23... f8c8  24. h1c1 