What is the best continuation for White?

October 2018 Member Main #1 Tournament, https://itsyourturn.com
Analysis of John Coffey vs. chugbezek

8 7 6 5 4 3 2 1 a b c d e f g h 0

(white to move) 1. Nf3 Nf6 2. d4 g6 3. c4 d6 4. Nc3 Bg7 5. e4 O-O 6. Be2 b6 7. O-O Bb7 8. Qc2 Nbd7 9. Be3 c5 10. d5 Re8 11. Bf4 Qc7 12. Rfe1 a6 13. Rad1 Ng4 14. Qd2 Bf6 15. h3 Nge5 16. Nxe5 dxe5 17. Be3 Red8 18. a3 Qd6 19. b4 cxb4 20. axb4 Qxb4 21. Rb1 Qd6 22. Na4 Rab8 23. Bxb6 Nxb6 24. Rxb6 Qc7 25. Reb1 Ba8 26. c5 Rxb6 27. cxb6 Qb8 28. Qa5 e6 29. b7 Bxb7 30. Bxa6 Rd7 31. Nc5 Rc7 32. dxe6 fxe6 33. Qb6

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