Chess puzzle (Checkmate)
Opening: French_Defense, French_Defense_MacCutcheon_Variation
Moves: 1. d4 e6 2. e4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Be3 Ne4 7. Qg4 g6 8. a3
Bxc3+ 9. bxc3 c5 10. dxc5 Qa5 11. Ne2 Nc6 12. f3 h5 13. Qh4 Nxc3 14. Bd2 d4 15.
Nxd4 Qxc5 16. Nxc6 bxc6 17. Qf6 Rg8 18. Bd3 a5 19. Bg5 Nd5 *
Position (FEN): r1b1k1r1/5p2/2p1pQp1/p1qnP1Bp/8/P2B1P2/2P3PP/R3K2R w KQq - 2 20
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1173
Best move: Qd8#