The Chilean Football League, officially known as Primera División, is the top professional football division in Chile. Established in 1933, it features 16 teams competing annually for the championship title. The league operates on a system of promotion and relegation with the Primera B, the second tier of Chilean football. Each season, teams play a series of matches, and the club with the most points at the end is crowned the champion. The league is known for its passionate fan base and has produced notable players who have gone on to achieve success in international football.