Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. Nc3 Nc6 5. Bc4 Nf6 6. d3 Ng4 7. Qe2 Nf2 8. Rf1
Ng4 9. h3 Nf6 10. fxe5 dxe5 11. Bg5 Nd4 12. Nxd4 Qxd4 13. Bxf6 gxf6 14. Rxf6
Rf8 15. O-O-O Bd7 16. Rdf1 O-O-O 17. Rxf7 Rxf7 18. Rxf7 Bc6 19. Bb5 Ba3 20.
Bxc6 Qxc3 21. Bxb7+ Kxb7 22. bxa3 Rd6 23. Qd2 *
Position (FEN): 8/pkp2R1p/3r4/4p3/4P3/P1qP3P/P1PQ2P1/2K5 b - - 2 23
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 923
Best move: Qa1#