Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 c5 6. d5 b5 7. cxb5 a6 8. Nf3 axb5
9. Bxb5+ Bd7 10. Bxd7+ Nbxd7 11. O-O O-O 12. Qc2 Qb6 13. h3 e5 14. f5 c4+ 15.
Kh1 Nc5 16. Be3 Qc7 17. Nb5 Qd7 18. Qxc4 Ncxe4 19. Bf2 Rac8 20. Qb3 Rc5 21.
Bxc5 dxc5 22. Rfd1 Nf2+ 23. Kg1 Nxd1 24. Rxd1 e4 25. Nh2 Qxf5 26. d6 Qd7 27. a4
Qe6 28. Qc2 Nd7 29. Ng4 h5 30. Ne3 Bh6 31. Nd5 e3 32. Ne7+ Kh7 33. Nc7 Qe5 34.
a5 e2 35. Re1 Be3+ 36. Kh1 Qg3 37. Qxe2 Bf4 38. Kg1 Ne5 39. Ned5 Qh2+ 40. Kf1
Bg3 41. Qe4 Qh1+ 42. Ke2 *
Position (FEN): 5r2/2N2p1k/3P2p1/P1pNn2p/4Q3/6bP/1P2K1P1/4R2q b - - 10 42
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 821
Best move: Qxe1#