Thank you for your answer. I've searched the web and found a similar discussion in bridgewinners, link is here; http://bridgewinners.com/article/view/defining-your-level/ Originator has indicated his understanding/interpretation of the BBO definitions (Novice, Beginner, Intermediate, Advanced, Expert, World Class) and others (including Fred Gitelman "who is responsible for the existing “official” definitions on BBO and who is not claiming they are anywhere near perfect!") commented on that.