Karpos Open 2013 Rd6-GM Hansen E(CAN)

Here is Hansen's rd 6 game. 

This was a nice attacking effort after black was caught uncastled.

(Annotations upgraded March 17-2013)

Hansen,Eric (2557) - Firat,Burak (2428) 
Sicilian Taimanov English Attack[B48]
Karpos Open 2013 Skopje, hotel (6.24), 13.03.2013

Position 1
Material is even but black's king is caught in the center. What do you recommend for white?

White to Play

20..Qf4