Middlegame trap

[Event "Challenge"] [Site "http://www.redhotpawn.com"] [Date "2011.05.28"] [EndDate "2011.06.12"] [Round "?"] [White "watchyourbackrank"] [Black "bobbylee106"] [WhiteRating "1883"] [BlackRating "1719"] [WhiteElo "1883"] [BlackElo "1719"] [Result "1-0"] [GameId "8452562"] 1. e4 c5 2. Ng1f3 Nb8c6 3. d4 cxd4 4. Nf3xd4 e5 5. Nd4b5 d6 6. Bf1c4 Ng8f6 7. Bc1g5 Bf8e7 8. Bg5xf6 gxf6 9. Qd1h5 O-O 10. O-O a6 11. Nb5c3 Nc6d4 {eyes c2 and then the rook on a1} 12. Nc3d5 {you can have the pawn and the rook if you like!} Nd4xc2 {he falls for the trap. a whole rook was too much to resist} 13. Nb1c3 Nc2xa1 14. Nd5xe7 {the point. now f6 is a problem for black} Qd8xe7 15. Nc3d5 Qe7d8 16. Qh5h6 {Nxf6 and mate is the threat now} Bc8e6 {trying to get as much material for the queen as possible} 17. Bc4d3 {strong move! saves the bishop because Bxd5 is not possible. see note to next move} Na1c2 {Bxd5?? exd5 and h7 is not to be defended} 18. Bd3xc2 Ra8c8 19. Bc2b1 Rc8c4 20. Nd5xf6 Qd8xf6 {he is forced to give up his queen} 21. Qh6xf6 Rf8c8 22. Qf6h6 Rc4d4 23. Rf1c1 Rc8xc1 24. Qh6xc1 f6 25. f3 b5 26. Kg1f2 Kg8g7 27. b3 h5 28. Kf2e2 Kg7g6 29. Qc1c6 b4 30. Qc6xa6 Be6f7 31. Bb1d3 {his rook is out of the game} Kg6g5 32. Qa6c8 Bf7g6 33. g3 Bg6f7 34. Qc8f5 {next comes Qxf6. Black's position is hopeless} 1-0