Chess puzzle (Checkmate)
Opening: French_Defense, French_Defense_Advance_Variation
Moves: 1. e4 e6 2. d4 d5 3. e5 c5 4. Be3 Nc6 5. Bb5 cxd4 6. Bxd4 Qa5+ 7. Nc3 Bd7 8. a3
Nxd4 9. Bxd7+ Kxd7 10. Qxd4 Nh6 11. O-O-O Nf5 12. Qd2 Rc8 13. Nge2 Rc6 14. g4
Bxa3 15. gxf5 Bxb2+ 16. Kxb2 Rb6+ 17. Nb5 Rxb5+ 18. Kc1 *
Position (FEN): 7r/pp1k1ppp/4p3/qr1pPP2/8/8/2PQNP1P/2KR3R b - - 1 18
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 629
Best move: Qa1#