Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. d3 Bb4+ 3. Bd2 Nc6 4. Bc3 Bxc3+ 5. bxc3 Nge7 6. a4 d6 7. Na3 Ng8 8.
Qb1 Bg4 9. Qb2 Qg5 10. Ne2 Nd4 11. Qxb7 Rd8 12. Rb1 Nxc2+ 13. Kd1 Qd2+ 14. Kxd2
Nxa3 15. Rb4 Bxe2 16. Bxe2 Nf6 17. Qa6 Nxe4+ 18. dxe4 d5 19. Qxa7 Nc4+ 20. Kd3
dxe4+ 21. Kxe4 Nd2+ 22. Ke3 f5 23. Rb8 *
Position (FEN): 1R1rk2r/Q1p3pp/8/4pp2/P7/2P1K3/3nBPPP/7R b k - 1 23
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1364
Best move: f4#