When the Chicago Blackhawks won three Stanley Cups over six seasons from 2010-15, general manager Stan Bowman was constantly forced to shuffle his deck to comply with the salary cap constraints. His skillful retooling of the Blackhawks every season was an important element of his team’s success. The Blackhawks are an organization accustomed to thriving in the midst of constant change, but what happened this offseason will provide them their sternest challenge since Bowman took over as GM for the start of the 2009-10 season. “This is a little bit different,” Blackhawks right wing Patrick Kane told USA TODAY Sports. “We’ve moved on from some core players. It has a little bit of a different feel. We need to come together quickly. There are so many new players coming in." The Blackhawks finished the regular season last April with a Western Conference-leading 109 points. But that feels like a long time ago. Since then, Marian Hossa announced he can’t play this season because of a skin condition, and top four defenseman Niklas Hjalmarsson and dynamic 31-goal scorer Artemi Panarin were dealt to the Arizona Coyotes and Columbus Blue Jackets, respectively. Dependable role player Marcus Kruger is also gone. Among the additions: The Blackhawks reacquired Brandon Saad from Columbus in the Panarin deal, and former Blackhawk Patrick Sharp, 35, was signed as a free agent.