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. 22... e8d8 [%c_effect d8;square;d8;type;Inaccuracy;persistent;true] 23. a1b1  23... b6c7  24. e1e7  24... g4h3  25. g2g3  25... b7b6 Jumabayev tries to play c6-c5, but he has no time. 26. a3b4 [%c_effect b4;square;b4;type;GreatFind;persistent;true] 26... a5b7  27. d2c4  27... g7g6 Defending the c6-pawn but leaving f7 to its fate. 28. e7f7  28... c6c5  29. d4b5  29... d8d7  30. f7d7  30... h3d7  31. b4a3 White is two pawns up, and we could think that the game is decided, but we will still have an almost inexhaustible amount of adventures. 31... d7e6  32. c4e3 [%c_effect e3;square;e3;type;Inaccuracy;persistent;true] 32... c7f4  33. a3c1  33... b7a5  34. e3g2  34... f4b8  35. c1f4  35... e6b3  36. f4b8  36... c8b8  37. f2f4 [%c_effect f4;square;f4;type;GreatFind;persistent;true] Passed pawns must be pushed. This saying never gets old. 37... b3a4 