Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. e3 e6 3. c3 d5 4. a3 Bd6 5. h3 b6 6. Nd2 O-O 7. Ngf3 c5 8. b3 Nbd7
9. Bb2 Bb7 10. Be2 Qe7 11. O-O Ne4 12. Nxe4 dxe4 13. Nd2 f5 14. Nc4 Bc7 15. Ne5
Nxe5 16. dxe5 Bxe5 17. Rb1 Rad8 18. Qc2 Qg5 19. c4 Bc7 20. Bc1 Rf6 21. f4 exf3
22. Bxf3 Qg3 23. Bxb7 Rh6 24. Rf3 Qh2+ 25. Kf2 Rg6 26. Kf1 Rd1+ 27. Qxd1 Rxg2
28. Ke1 Rg1+ 29. Rf1 *
Position (FEN): 6k1/pBb3pp/1p2p3/2p2p2/2P5/PP2P2P/7q/1RBQKRr1 b - - 3 29
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1539
Best move: Bg3#