Chess puzzle (Crushing)
Opening: Alekhine_Defense, Alekhine_Defense_Two_Pawn_Attack
Moves: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. Nc3 d6 5. f4 dxe5 6. fxe5 Nc6 7. Nf3 Bf5 8. d4
Nb4 9. Qa4+ *
Position (FEN): r2qkb1r/ppp1pppp/1n6/4Pb2/QnPP4/2N2N2/PP4PP/R1B1KB1R b KQkq - 2 9
Black to move.
Themes:  Opening  
Puzzle rating: 1079
Best move: Nxa4