Chess puzzle (Crushing)
Opening: Four_Knights_Game, Four_Knights_Game_Gunsberg_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. a3 Bc5 5. Bb5 Nd4 6. Nxe5 O-O 7. Ng4 *
Position (FEN): r1bq1rk1/pppp1ppp/5n2/1Bb5/3nP1N1/P1N5/1PPP1PPP/R1BQK2R b KQ - 2 7
Black to move.
Themes:  Opening  
Puzzle rating: 1387
Best move: Nxg4