The World Championship is organised by the World Professional Billiards and Snooker Association (WPBSA). It features 32 professional players competing in one-on-one single-elimination matches, played over several . The players are selected to take part using a combination of the world snooker rankings and a pre-tournament qualification round. The first World Championship, in 1927, was won by Joe Davis in a final at Camkin's Hall in Birmingham, England. Since 1977, the tournament has been held at the Crucible Theatre in Sheffield. The 1984 championship was won by England's Steve Davis, who defeated fellow countryman Jimmy White 18–16 in the final; this was Davis's third world championship win, following his victories in 1981 and 1983. The winner of the 1985 championship received a prize of £60,000 from a total of £250,000, the highest first prize amount for a snooker event to that date.