Chess Opening Theory/1. e4/1...c5/2. Nf3/2...d6/3. d4/3...cxd4/4. Nxd4/4...Nf6/5. Nc3/5...g6/6. Be3/6...Ng4

7. Ng4??
Black failed to spot the trap. The only winning move is 7. Bb5+