What is the strongest continuation for White?

ICC tourney 1651 (12 3), Internet Chess Club
john2001plus (1740) vs. lagarto300 (1830)

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

(white to move) 1. Nf3 Nf6 2. d4 d6 3. c4 g6 4. Nc3 Bg7 5. e4 O-O 6. Be2 e5 7. dxe5 dxe5 8. Bg5 h6 9. Qxd8 Rxd8 10. Bxf6 Bxf6 11. Nd5 Rxd5 12. cxd5 c6 13. Rc1 Bg4 14. dxc6 Nxc6 15. Ba6 Nb4 16. Bc4 Bxf3 17. gxf3 Nc6 18. Rg1 g5 19. Bd5 Nd4 20. Rg3 Bd8 21. h4 Kg7 22. hxg5 hxg5 23. Kd2 Kf6 24. Rh1 Ba5+ 25. Kd3 Rc8 26. Rh6+ Kg7 27. Rh5 Bd8 28. Rgh3 Rc7 29. Rh7+ Kf8 30. Rh8+ Ke7 31. Rh3h7 Rd7 32. Rxf7+ Kd6 33. Rh6+ Kc7 34. Rhh7

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Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight

Click here for 26... Ke7.
Click here for 27... f6.