Q:

How to combine Basic Strategies to a winning-system

Suppose one want to have a strategy so one can win over a "normal/average" chess-player.  I was thinking that there was a set of strategies which could be combined so that  one could memorize it?  Say the opening and the middle game.  Then one could always win over a "non experienced" chess-player.  

A:

That's not how chess works. 
Chess has too many possibilities for a "one size fits all"-strategy or set of strategies that you could learn by heart.  
At the risk of repeating myself: Learning chess is like learning a language.  It's kind of hard to learn a set of sentences that allow you to win any debate against an average debater. 
Instead, "understanding" is the key.  Languages and chess have to be learnt the hard way: Maybe some rote learning can be beneficial, but mostly you'll need lots of practice and exposure to "good chess"/correct language until you have developed an intuition about sentence structures/connotations/positions/tactics etc. 