Due to Chile 's qualification to the 2010 FIFA World Cup , the format for the season had seen a minor modification in the Apertura , which would not have the playoff stage . The Clausura remained unchanged . In the wake of the 8.8 magnitude earthquake that struck the country on February 27 , the format was further changed to a double round-robin format by the ANFP , because many teams could not fulfill their Apertura fixtures in time as a result of the earthquake damage . After the Round 1 ( the first 17 dates ) , the team with the most points qualified to the 2010 Copa Sudamericana and the 2011 Copa Libertadores . The next best-placed team played a playoff against Municipal Iquique for the last berth in the 2010 Copa Sudamericana . The season champion ( the team with the most points after all 34 dates ) also earned a berth to the 2011 Copa Libertadores . The '' Chile 3 '' berth for that competition have gone to the winner of a Liguilla of the 2nd , 3rd , 4th , and 5th best-placed teams at the end of the season
earthquake
2010 Chile earthquake
2010 Primera Division of Chile