Chess puzzle (Crushing)
Opening: Alekhine_Defense, Alekhine_Defense_Other_variations
Moves: 1. e4 Nf6 2. Qf3 d5 3. e5 Ne4 4. d4 h5 5. c3 c5 6. Bb5+ Nc6 7. Be3 *
Position (FEN): r1bqkb1r/pp2ppp1/2n5/1BppP2p/3Pn3/2P1BQ2/PP3PPP/RN2K1NR b KQkq - 3 7
Black to move.
Themes:  Opening  
Puzzle rating: 1709
Best move: Bg4