You choose the safe 4. Qc2. The game continues 4. ... O-O, 5. a3 Bxc3+, 6. Qxc3 Ne4, 7. Qc2 f5, 8. Nf3 b6, 9. g3 Bb7, 10. Bg2 Nf6, 11. O-O Be4, 12. Qc3 d6, 13. b4 Nbd7, 14. Bb2 Qe8, 15. Rad1 Qh5, 16. c5 Nd5, 17. Qc1 N7f6, 18. h3 f4, 19. g4 Nxg4, 20. hxg4 Qxg4, 21. Ne1 Bxg2, 22. Nxg2 f3, 23. exf3 Rxf3, 24. Kh2 Raf8, 25. Qc2 Nf4,

You realise that 26. Nxf4 can be met by 26. ... Qxf4+, 27. Kg2 Qg4+, 28. Kh1 Rh3, checkmate and that there is no defence to the double threat of Qxg2 and Qh3.

You resign and have to accept your forfeit, which ruins your life.

(Actual game was Stojanovic, D - Prelevic, D. Source was www.chesslab.com which is a fantastic online resource.)