Muzychuk is playing excellent positional chess, reinforcing her position. It's not easy for White to protect the weak d3-pawn.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... g8f6  4. d2d3  4... f8e7  5. e1g1  5... e8g8  6. b1c3  6... d7d6  7. a2a4  7... c6a5  8. c4a2  8... a5c6 [%c_effect c6;square;c6;type;Interesting;persistent;true] A curious move. Much more natural is to advance the pawn to c5; no wonder it's the move played most often. But Muzychuk's idea is to take the knight to b4, gaining a tempo thanks to the positional threat of capturing the bishop, and only then to take the pawn to c5. 9. c1d2 This was played by Praggnanandhaa in a rapid game. 9... c6b4  10. a2b1 A new move. This looks like an awkward square for the bishop, but White is planning Ne2 and then c3, when the bishop can go to c2 or a2. 10... c7c5 Both players continue with natural moves, improving their positions. 11. h2h3  11... f8e8  12. c3e2  12... b4c6  13. e2g3  13... h7h6  14. f1e1  14... c8e6 Black has finished development and has a more comfortable position. 15. c2c3  15... a7a6 [%c_effect a6;square;a6;type;Interesting;persistent;true] An interesting prophylactic move with the idea of reducing the impact of the b2-b4 advance. 16. d2c1 This seems very passive, but actually it's a good move with the idea of playing d3-d4. 16... a8c8 Useful so that the rook can act on the c-file after d3-d4. 17. b1c2 [%c_effect c2;square;c2;type;Inaccuracy;persistent;true] White is unsure of what to do. The worst nightmare for a chess player is to be left without a plan. 17... e7f8  18. c2b3  18... d6d5 [%c_effect d5;square;d5;type;GreatFind;persistent;true] Black achieves the always desired central break. 19. e4d5  19... e6d5  20. g3e4  20... d5b3  21. e4f6  21... d8f6  22. d1b3  22... c6a5  23. b3c2 