No need to calculate.
1. g1f3  1... d7d5  2. e2e3  2... g8f6  3. c2c4  3... c7c5  4. c4d5  4... f6d5  5. b1c3  5... b8c6  6. f1b5 This line is coming into the spotlight lately. White is playing in the spirit of the Four Knights Sicilian. 6... d5b4 Not the strongest option in the Sicilian, but perhaps it will work here $2 7. a2a3  7... b4d3  8. e1e2  8... d3c1  9. a1c1 Black won the bishop pair but at the price of a serious development deficit. 9... c8d7  10. d2d4 Certainly $1 Harika wants to open up the position with her better prepared pieces. 10... c5d4 All of this has been seen before, and Black did well in the predecessor. Kosteniuk was, however, out of luck today. 11. b5c6 [%c_effect c6;square;c6;type;GreatFind;persistent;true] A strong novelty, which practically wins material by force. The bishop pair would not last for long; neither will Black's queenside. 11... d7c6  12. f3d4  12... d8b6 Kosteniuk is desperately trying to cement her queenside. 13. d4c6 There goes the bishop pair. 13... b7c6  14. d1a4 [%cal Rc3d5] With the huge threat of Nc3-d5 $1 14... a8d8 [%c_effect d8;square;d8;type;GreatFind;persistent;true] A smart way to defend, but White is too far ahead in the development. 15. b2b4 [%c_effect b4;square;b4;type;GreatFind;persistent;true] One of the good moves. 15... e7e6  16. c3e4 The c6-pawn is doomed. Kosteniuk needs to safeguard her king first, and this takes too much time. 16... d8c8  17. e4d2 The knight is aiming against the pawn. 17... a7a6  18. d2c4  18... b6b5  19. a4b5  19... a6b5  20. c4e5 This is it; the pawn is gone. 20... f8d6  21. e5c6  21... e8d7  22. c6d4  22... c8c1  23. h1c1 The opening ended a long time ago, but the consequences of the slow development are visible. Harika is a healthy pawn ahead and enjoys the more active pieces. 23... h8b8  24. f2f4 [%c_effect f4;square;f4;type;GreatFind;persistent;true] The Indian GM also demonstrates excellent technique. 24... g7g6 Trying to prepare the e6-e5 advance at least to gain some room for the bishop. 25. e2d3  25... b8b6 One more move of preparation is needed. 26. d4f3  26... f7f6  27. g2g4 [%c_effect g4;square;g4;type;GreatFind;persistent;true] Excellent $1 Harika will fix a second weakness. 27... b6a6  28. c1c3  28... h7h6  29. h2h4  29... h6h5  30. g4g5  30... f6g5  31. f4g5 Not letting Black have even the slightest chance. 31... d6g3  32. d3e4  32... d7d6  33. c3d3  33... d6e7  34. f3e5 Breakthrough time. 34... g3e5  35. e4e5  35... a6c6  36. e3e4  36... c6a6  37. d3f3  37... a6a8  38. f3c3  38... a8a7  39. c3c5  39... a7a3  40. c5b5  40... a3h3  41. b5b7  41... e7d8  42. e5e6 White is completely winning. It is not only about the pawn but her active pieces. 42... h3h4  43. e4e5  43... d8c8  44. b7h7  44... h4b4  45. e6f6  45... b4f4  46. f6g6  46... h5h4  47. e5e6  47... c8d8  48. h7f7  48... f4e4  49. g6f5  49... e4e1  50. g5g6  50... e1f1  51. f5g5  51... f1g1  52. g5f6  52... h4h3  53. f7f8  53... d8c7  54. e6e7  54... h3h2 