Chess puzzle (Checkmate)
Opening: Alekhine_Defense, Alekhine_Defense_Two_Pawn_Attack
Moves: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. a4 a5 5. Nc3 d6 6. f4 Bf5 7. Nf3 dxe5 8. Nxe5
N8d7 9. d4 Nxe5 10. fxe5 e6 11. Be2 Qh4+ 12. g3 Qe7 13. O-O O-O-O 14. Be3 Qb4
15. Qc1 Nxc4 16. Nb5 Nxe3 *
Position (FEN): 2kr1b1r/1pp2ppp/4p3/pN2Pb2/Pq1P4/4n1P1/1P2B2P/R1Q2RK1 w - - 0 17
White to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 1036
Best move: Qxc7#