Patrick Kane scored twice as Chicago beat the Boston Bruins 3-1 on Saturday to leave the Blackhawks one win away from clinching the Stanley Cup.
The best-of-seven series now shifts to Boston for Game Six on Monday with the Blackhawks holding a 3-2 lead and the Bruins needing a victory to extend the series.
Kane scored the only goal in each of the first two periods to put Chicago ahead 2-0 before the Bruins' defenseman Zdeno Chara pulled one back early in the third.
Chicago's Dave Bolland, however, ended the threat of potential overtime as they Bruins desperately pressed for an equaliser and he scored into an empty net with 14 seconds to play.
Chicago netminder Corey Crawford, who had been criticised for his shaky play in Game Four, was razor sharp making 24 saves.