Chess and bridge clustering the countries

Abstract. This paper investigates the two most popular brain games over the world: chess and bridge. The used data are the number of chess players beyond Elo 2000 and the number of bridge masterpoints earned by the countries over the world. We check the developments over the last 15 years and investigate the clusters. It turns out that there is some, but not too strong dependence between the level and the tendencies of the two sports within a country.