1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 g6 5. Bxc4 Bg7 6. O-O O-O 7. Nc3 Bg4 8. h3 Bxf3 9. Qxf3 c6 10. Rd1 Qc7 11. e4 b5 12. Bf4 Qb6 13. Bb3 Rd8 14. e5 Ne8 15. Bg5 e6 *
From 4 ... Bg4 it was just one bad idea after another.
Another where the losing moment was more abrupt.
1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 Nc6 6. Bc4 a6 7. O-O d6 8. Bf4 Nf6 9. Re1 b5 10. Bb3 Bb7 11. Rc1 Na5 12. a4 b4 13. Ne2 Nxe4 14. Ng3 Nc5 15. Ne4 Bxe4 16. Ng5 Naxb3 17. Nxe4 Nxc1 18. Qxc1 Nd3 19. Qc6+ Ke7 20. Bxd6+ *