Chess puzzle (Checkmate)
Moves: 1. e4 d6 2. Nc3 Nf6 3. d4 g6 4. Be3 c6 5. Qd2 b5 6. f3 Nbd7 7. O-O-O Qa5 8. Kb1
Nb6 9. Bh6 Bxh6 10. Qxh6 b4 11. Nce2 Ba6 12. h4 O-O-O 13. g4 c5 14. h5 c4 15.
hxg6 hxg6 16. Qxh8 Rxh8 17. Rxh8+ Kc7 18. Nc1 Na4 19. Rf8 Nxb2 20. Re1 Na4 21.
Nge2 Nc3+ 22. Ka1 Qa3 23. Rxf7 Nxa2 24. Nxa2 b3 25. Nc3 bxa2 26. Nxa2 Kd8 27.
e5 c3 28. Rb1 Ke8 29. Rxe7+ Kxe7 30. exf6+ Kxf6 31. Bxa6 Qxa6 32. Re1 Qc4 33.
Re3 Qxd4 34. Rxc3 a5 35. Kb1 Ke5 36. Rd3 Qb6+ 37. Kc1 Kf4 38. Nc3 Qg1+ 39. Kb2
Kg5 40. Ne4+ Kf4 41. Nxd6 Qb6+ 42. Kc3 *
Position (FEN): 8/8/1q1N2p1/p7/5kP1/2KR1P2/2P5/8 b - - 2 42
Black to move.
Themes:  Endgame Dovetail Mate, Mate in 1 
Puzzle rating: 1047
Best move: Qb4#