[%c_effect d8;square;d8;type;Inaccuracy;persistent;true]
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6  4. d2d3  4... f8c5  5. c2c3  5... d7d5  6. e4d5  6... d8d5  7. b5c4  7... d5d6  8. b2b4  8... c5b6  9. b1d2  9... c8g4 A new move. Jumabayev had used a lot of time already, so I doubt it was prepared beforehand. 10. a2a4 Judging by the continuation of the game, it's possible to say that castling immediately is more accurate. 10... e5e4 [%c_effect e4;square;e4;type;GreatFind;persistent;true] A very strong pawn sacrifice. 11. d3e4  11... a7a5 [%c_effect a5;square;a5;type;GreatFind;persistent;true] It's necessary to give some air for the bishop. 12. b4a5  12... c6a5  13. c4b5  13... c7c6  14. b5e2  14... e8c8  15. e1g1 For the sacrificed pawn, Black has an advantage in development and attacking chances. But his next move allows White to simplify the position. 15... h8e8 [%c_effect e8;square;e8;type;Inaccuracy;persistent;true] 16. e4e5  16... d6e6  17. e5f6  17... e6e2  18. d1e2  18... e8e2  19. f6g7 Changing the queens must have been a great relief for Erigaisi. 19... d8g8  20. f3d4  20... e2e8  21. c1a3  21... g8g7  22. f1e1 Now White has a serious advantage. The compensation for the pawn is not adequate anymore.