I've been staring at this tactic for 3 days and my retarded eyes don't know what to do. Knight sacrifice on f3 does nothing, nothing with taking the rook, nothing with taking the bishop, nothing with taking the knight, what the fuck do I do? I tried every single variation and nothing works. I will never get better at this game. Give me some fucking tip without spoiling so even my retarded brain can find what to do.