I want you to go back and find the beginning post when P+K came into the conversation. Start reading from there until you get back here. Everything you are asking or trying to find out has been covered and explained. Now if you are not understanding it, ok, things can be broken down for you further, if possible.
I refuse to answer or explain things that I just got finished doing. Everything you want to know is all in previous post about this move. The move is not as deep as you think it is. Again, if you don't understand something, say that.