What is the best move for White?

analysis

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

(white to move) 1. Nf3 Nc6 2. d4 d5 3. c4 Nf6 4. cxd5 Nxd5 5. e4 Nf6 6. d5 Nb8 7. Nc3 e6 8. Qa4+ c6 9. Bg5 b5 10. Qc2 b4 11. Bxf6 gxf6 12. Na4 cxd5 13. exd5 Be7 14. Bc4 O-O 15. Rd1 Qc7 16. O-O Ba6 17. b3 Bxc4 18. Rd4 exd5 19. Rxd5 Rc8 20. Rh5 Bd3 21. Qxd3 Qc2 22. Qd5 Nc6 23. Rh3 Rc7 24. Rg3+ Kf8 25. Qh5 Rd8 26. Qh6+ Ke8 27. Rg8+ Kd7 28. Qh3+ Kd6 29. Rg4 Rb7 30. Rc4 Qe2 31. Rfc1 Rc7 32. Nh4 Bf8 33. Nf5+ Kd5 34. Ne3+ Kd6 35. Qf5 Bg7 36. Re4 Qd3 37. Nc4+ Qxc4 38. Rd1+ Nd4 39. bxc4 Rxc4 40. Rexd4+ Rxd4 41. Rxd4+ Ke7 42. Qe4+ Kf8 43. Rxd8#

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Options:
	- allow legal moves only;
	- use short algebraic notation;
movement/animation speed: (slow) (fast)
	- show legal moves;

 

Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight