The World Professional Billiards and Snooker Association (WPBSA), the governing body for professional snooker, first introduced a ranking system for professional players in 1976, with the aim of seeding players for the World Snooker Championship. The reigning champion would be automatically seeded first, the losing finalist from the previous year seeded second, and the other seedings based on the ranking list. Initially the rankings were based on performances in the preceding three world championships, with five points for the winner, four for the runner-up, three for losing semi-finalists, two for losing quarter-finalists, and on for losers in the last 16 round. Following the 1982 World Snooker Championship, the Jameson International and the Professional Players Tournament which were open to all members of the WPBSA. These events carried points as per the previous system. Points for World Championship finishes were now worth double the previous tariff, with ten points for the winner, eight for the runner up, and so on. In the 1983–84 snooker season, the Lada Classic was added as a ranking tournament, and "merit points" were introduced. Merit points were awarded to players who were required to compete in qualifying rounds of ranking tournaments who reached the last 32, with a full merit point awarded if this was achieved in the world championship, and half a merit point otherwise. No points were awarded to a player who did not win any matches in a given tournament: for example, a top 16 player seeded into the last 32 of the world championship would not win any merit points if they lost their first match.