Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. b3 Nf6 3. d3 Bb4+ 4. c3 Ba5 5. Bb2 Nc6 6. b4 Bb6 7. Nf3 d5 8. exd5
Nxd5 9. Be2 O-O 10. O-O Bf5 11. a4 a6 12. b5 axb5 13. c4 bxc4 14. dxc4 Nf4 15.
Qe1 Bd4 16. Nc3 Bd3 17. Nxd4 Qxd4 18. Bxd3 Nxd3 19. Qb1 Nxb2 20. Qxb2 Qxc4 21.
Qc2 Nd4 22. Qb2 Rfe8 23. Rfc1 Qb3 24. Qd2 c6 25. Ne4 f5 26. Nd6 Re7 27. Rcb1
Qc2 28. Qg5 Rd7 29. Nxb7 Nb3 30. Rxb3 Rd1+ 31. Rxd1 *
Position (FEN): r5k1/1N4pp/2p5/4ppQ1/P7/1R6/2q2PPP/3R2K1 b - - 0 31
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 609
Best move: Qxd1#