Probably better to link here: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Go_professional#Discrepancies_among_professionals" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Go_professional#Discrepancies_...</a><p>The difference between an amateur 2D and 9D is not the same as the difference between a professional 2P and 9P.