The Lynx struggled for a half before the league's best offense got going.
When it finally did, the Seattle Storm could not keep up. Four starters scored in double figures as the Lynx beat the Storm 78-70 on Friday at Target Center before an announced crowd of 9,213.
The best-of-three Western Conference semifinal series now moves to Seattle for Game 2 on Sunday.
"The hardest game to win is the first one," Lynx coach Cheryl Reeve said. "We played great defense."
The Lynx had to. Because Seattle always does. The Storm held opponents to a league-low 71.6 points and a 39.1 shooting percentage.
At halftime, the Lynx held a six-point lead at 33-27. The point total was right where Seattle wanted it.
"We've got to clean up our offense," Reeve said. "We've got a lot of weapons, but we stalled a lot."
Until Seimone Augustus came out scoring in the third quarter. She scored on a layup, on a baseline jumper and on a fast break after making a steal during an 8-2 run that put the Lynx ahead by 12 points.