Chess puzzle (Checkmate)
Opening: Three_Knights_Opening, Three_Knights_Opening_Other_variations
Moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 b6 4. d3 Bb7 5. Be2 Bc5 6. O-O Nf6 7. h3 Qe7 8. Nh2
a6 9. Kh1 O-O-O 10. f4 exf4 11. Bxf4 h6 12. a3 g5 13. b4 Bd4 14. Nd5 Nxd5 15.
exd5 gxf4 16. dxc6 Bxc6 17. Bf3 Bxf3 18. Qxf3 Bxa1 *
Position (FEN): 2kr3r/2ppqp2/pp5p/8/1P3p2/P2P1Q1P/2P3PN/b4R1K w - - 0 19
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1015
Best move: Qa8#