What was my mistake, appart from ...Nxe4?
His castled position looked shaky, an I should've been able to do something[Event "Winter TNM"]
[Site "San Francisco"]
[Date "26.1.2016"]
[Round "4"]
[White "Askin, Michael C"]
[Black "Houshdaran, S"]
[Result "1-0"]
[BlackElo "1736"]
[ECO "E91"]
[Opening "King's Indian"]
[Variation "6.Be2 c5 7.O-O"]
[WhiteElo "1958"]
[TimeControl "300"]
[Termination "normal"]
[PlyCount "57"]
[WhiteType "human"]
[BlackType "human"]
1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 O-O 5. e4 d6 6. Be2 c5 7. O-O cxd4 8.
Nxd4 Nc6 9. Nxc6 bxc6 10. Be3 Be6 11. f4 Qa5 12. Qc2 Qb4 13. a3 Qb7 14. f5
Bd7 15. c5 Rfb8 16. b4 a5 17. Rab1 axb4 18. Rxb4 Qc8 19. Na4 Qe8 20. g4
Rxb4 21. axb4 Nxe4 22. Nb6 d5 23. Nxa8 Qxa8 24. Bd3 Qa3 25. Kh1 Be5 26. Bh6
Qxb4 27. Bxe4 Qxe4+ 28. Qxe4 dxe4 29. Rd1 1-0