Diamant-medlem
Contents: Oxygen, Carbon, Hydrogen, Nitrogen, Calcium, Phosphorus, Potassium, Sulfur, Sodium, Chlorine, Magnesium, Iron, Fluorine, Zinc, Rubidium, et al.
Klubber
Secret Dark Knight Society
83 Medlemmer
Mat Bobula's Chess School
1 160 Medlemmer
USChess
59 750 Medlemmer
Chess.com Legends Club
1 819 419 Medlemmer
Anna Rudolf's Fan Club
18 757 Medlemmer