Since 2005, Chile’s professional soccer league has used a game-scheduling system based on an integer linear programming model. The Chilean league managers have considered several criteria for the last tournaments’ scheduling, involving operational, economic and sporting factors, thus generating a highly constrained problem, in practice unsolvable by their last methodology. This led to the adoption of a model with real conditions, some of them totally new in the use of sports scheduling techniques in soccer leagues. The schedules so obtained have meant greater benefits for the teams, given by lower costs and higher incomes, fairer seasons and tournaments that are more attractive to sports fans. Such success has completely fulfilled the expectations of the Asociación Nacional de Fútbol Profesional (ANFP), the organizing body for Chilean professional soccer.