Simplify the following text for a Grade 12 native English-speaking person.
Original: The season began on October 2 , 2009 ; with a pair of games against the Florida Panthers in Helsinki , Finland ; and ended on June 9 , 2010 ; when the Blackhawks defeated the Philadelphia Flyers , 4 games to 2 , in the 2010 Stanley Cup Finals , giving the organization its first NHL championship since 1961 and fourth overall .
Simplified: On June 9 , 2010 , The Blackhawks defeated the Philadelphia Flyers , 4 games to 2 , in the 2010 Stanley Cup Finals which gave the organization its first NHL championship since 1961 and fourth overall