Chess puzzle (Checkmate)
Moves: 1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. d4 e6 5. f4 c5 6. Nf3 Nc6 7. Be3 cxd4 8. Nxd4
Bc5 9. Qd2 a6 10. h4 Nxd4 11. Bxd4 Qc7 12. g4 b5 13. Bg2 Bb7 14. h5 h6 15.
O-O-O Rc8 16. f5 b4 17. Bxc5 Qxc5 18. Na4 Qb5 19. fxe6 fxe6 20. b3 Nc5 21. Nxc5
Qxc5 22. Rhf1 Qc3 23. Rf4 *
Position (FEN): 2r1k2r/1b4p1/p3p2p/3pP2P/1p3RP1/1Pq5/P1PQ2B1/2KR4 b k - 3 23
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1117
Best move: Qa1#