Chess puzzle (Checkmate)
Opening: Vant_Kruijs_Opening, Vant_Kruijs_Opening_Other_variations
Moves: 1. e3 d5 2. b3 Bf5 3. Bb2 e6 4. h4 Nh6 5. f3 Qd6 6. Qe2 Qg3+ 7. Kd1 Nc6 8. Nc3
Bb4 9. a3 Bxc3 10. Bxc3 e5 11. Qb5 O-O-O 12. Ne2 Qg6 13. d3 a6 14. Qc5 b6 15.
h5 Qf6 16. Bxe5 Qxe5 17. Qxc6 Qxa1+ 18. Kd2 Qxa3 19. g4 Bd7 *
Position (FEN): 2kr3r/2pb1ppp/ppQ4n/3p3P/6P1/qP1PPP2/2PKN3/5B1R w - - 1 20
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 886
Best move: Qa8#