According to the offical rules of the Wine Century Club, you DO NOT have to have the varietals individually. They can be part of a blend. So if you've had a Chateau de Beaucastel CdP, you've had all 13 varietals from Chateauneuf du Pape.
This is a group for those of us who wish to broaden the scope of our wine discovery by gaining admission into the Wine Century Club. This group is a
"support group" for those wine adventurers who have tasted/wish to taste 100+ wine varietals.