What is the strongest continuation for White?

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john2001plus (1915) vs. Gusev (1834)

8 7 6 5 4 3 2 1 a b c d e f g h +6

(white to move) 1. e4 c5 2. Nf3 Nc6 3. c3 e6 4. d4 d5 5. e5 Qb6 6. a3 f6 7. b4 cxd4 8. cxd4 fxe5 9. dxe5 Nge7 10. Be3 Qc7 11. Nc3 Nxe5 12. Nb5 Nxf3+ 13. Qxf3 Qd7 14. Nxa7 Nf5 15. Bb5 Bd6 16. Bxd7+ Bxd7 17. g4 Nxe3 18. Qxe3 O-O 19. Qb6 Be5 20. Ra2 Bc3+ 21. Ke2 e5 22. f3 Bd4 23. Qxb7 Rxa7 24. Qxd5+ Kh8 25. Rc1 h5 26. gxh5 Kh7 27. a4 Rf4 28. Rac2 Bxa4 29. Rc7 Rxc7 30. Rxc7 Be8 31. h6 Kxh6 32. Qe6+ Bg6 33. Rc8 e4 34. Rh8+ Kg5 35. h4+ Rxh4 36. Qd5+ Kf6 37. Qxd4+

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