Nick Leddy scored 2:45 into overtime and the Chicago Blackhawks improved to 6-0 - the best start in franchise history - with a 2-1 win over the Detroit Red Wings on Sunday night.
After taking a cross-ice pass from Viktor Stalberg, Leddy fired from the left circle and beat Detroit goalie Jimmy Howard with a shot that slipped just under his glove.
Detroit's Johan Franzen connected early in the third to tie the game at 1 and set up overtime.
Duncan Keith scored a power-play goal in the first period for Chicago, and Corey Crawford finished with 29 saves in his fifth start in six games.
Howard, who has started all five of Detroit's games, made 25 saves.
The Blackhawks started 5-0 in 1971-72 - Hall of Famer Bobby Hull's final season in Chicago - and matched it on Saturday night with a 3-2 win in Columbus.
Chicago killed all six of Detroit's power plays, improving to 22 of 23 this season. Injury-depleted Detroit has gone just 2 for 26 with the man advantage so far.