Chess puzzle (Checkmate)
Opening: Modern_Defense, Modern_Defense_Other_variations
Moves: 1. e4 g6 2. d4 Bg7 3. Nf3 c6 4. Nc3 Nf6 5. Be2 O-O 6. e5 Ne8 7. Be3 Qb6 8. b3
d6 9. Qd2 dxe5 10. dxe5 Qc7 11. Bh6 Bg4 12. Bxg7 Kxg7 13. h3 Bxf3 14. Bxf3
Qxe5+ 15. Be2 Nd6 16. O-O-O Nd7 17. Rhe1 Ne4 18. Nxe4 *
Position (FEN): r4r2/pp1nppkp/2p3p1/4q3/4N3/1P5P/P1PQBPP1/2KRR3 b - - 0 18
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 844
Best move: Qa1#