Chess puzzle (Checkmate)
Opening: Alekhine_Defense, Alekhine_Defense_Four_Pawns_Attack
Moves: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. d4 d6 5. f4 dxe5 6. fxe5 Nc6 7. Be3 Bf5 8. Nf3
e6 9. Nc3 Qd7 10. Qd2 O-O-O 11. O-O-O h6 12. h3 Nb4 13. a3 Qa4 14. Nxa4 *
Position (FEN): 2kr1b1r/ppp2pp1/1n2p2p/4Pb2/NnPP4/P3BN1P/1P1Q2P1/2KR1B1R b - - 0 14
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1036
Best move: Na2#