Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 dxc4 3. e4 e5 4. d5 Bb4+ 5. Nc3 Bxc3+ 6. bxc3 b5 7. Nf3 Nd7 8.
Rb1 a6 9. a4 Ngf6 10. axb5 Nxe4 11. Bxc4 Nxc3 12. Qb3 Nxb1 13. Qxb1 axb5 14.
Bxb5 Rb8 15. Nxe5 Ba6 16. Bxd7+ Kf8 17. Qf5 Qe7 18. Ba3 Rb1+ 19. Qxb1 Qxa3 20.
Qb8+ Ke7 21. Qxh8 *
Position (FEN): 7Q/2pBkppp/b7/3PN3/8/q7/5PPP/4K2R b K - 0 21
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1447
Best move: Qc1#