you cant just simply use (w+1)/2, it works only if w is even not when w is odd.

and you speak the truth? lol.

William lin has already stated many times in his videos that the only thing that makes a difference is practice(he is an international master). now before declaring this as a lie do you know what actually practice does to you?. sure you need talent no denying that but what makes practice beneficial ? if you can answer that then you would know what you were up to till now.