抛砖引玉Just a suggestion. 外籍棋手可以临设棋力检定 (E.g. Exam consisting of 3 levels). 用考试的结果来决定外籍棋手下 GrpA or Grp B.
not easy, ......
self declaration in the competition registration form and place them in Group A or B, if by mistake and place them in Group A, one way is to allow to downgrade them back to Group B the next year if their performance is no good in the current year Group A. ...... To follow the Hong Kong rule.