Chess puzzle (Checkmate)
Opening: Grob_Opening, Grob_Opening_Grob_Gambit
Moves: 1. g4 d5 2. Bg2 Bxg4 3. c4 c6 4. Qb3 e6 5. cxd5 cxd5 6. Qa4+ Nd7 7. Qxg4 Rc8 8.
Nc3 Ngf6 9. Qg3 Bb4 10. a3 Ba5 11. e4 Bxc3 12. bxc3 O-O 13. e5 Ne4 14. Bxe4
dxe4 15. Qg2 Nc5 16. Ne2 Nd3+ 17. Kd1 Qd7 18. Rg1 *
Position (FEN): 2r2rk1/pp1q1ppp/4p3/4P3/4p3/P1Pn4/3PNPQP/R1BK2R1 b - - 7 18
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1257
Best move: Qa4#