Editing Go ranks and ratings (section)

===Origin===
The first Go ranks were given in 2nd century (CE) China, when [[Handan Chun]] (Chinese: [[wikt:邯郸|邯郸]][[wikt:淳|淳]]) described the [[9 Pin Zhi]] (九品制) ranking system in his book ''[[Classic of Arts]]'' (艺经).
From the early 17th century, the [[Japan]]ese formalised the teaching and ranking of Go.<ref name=sansa>{{Citation | author = GoGoD (Fairbairn & Hall) | title = Articles on Famous Players | chapter = Honinbo Dosaku | year = 2007 }}</ref> The system was later used in [[martial arts]] schools; and is thought to be derived originally from [[nine-rank system|court ranks]] in [[China]]. It is thought that the fact that there are 9 professional dan grades finds its base in the original 9 Chinese Pin Zhi grades.