Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. e3 Bb4+ 6. Bd2 dxe3 7. fxe3 Bg4 8.
Nc3 Bxf3 9. Qxf3 Nxe5 10. Qe4 f6 11. Rd1 c6 12. Be2 Qc7 13. O-O O-O-O 14. a3
Bxc3 15. Bxc3 Ne7 16. b4 Rd7 17. a4 N7g6 18. c5 Re8 19. Qc2 Kb8 20. Qb2 Qd8 21.
b5 Ka8 22. a5 Nd3 23. Bxd3 Rxd3 24. Rxd3 Qxd3 25. bxc6 Qxe3+ 26. Kh1 bxc6 27.
a6 Qxc5 *
Position (FEN): k3r3/p5pp/P1p2pn1/2q5/8/2B5/1Q4PP/5R1K w - - 0 28
White to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1139
Best move: Qb7#