Forwards Darren Haydar (2G) and Jordan Schroeder scored while goaltender Eddie Lack (1-1) stopped 18 shots for Chicago, which cut its deficit in the best-of-five series to 2-games-to-1.
“We had a great start in the first and did a lot of things we set out to do,” said Wolves head coach Craig MacTavish. “We let them back in it in the second, but we defended well enough to hang on in the third.”
Chicago (1-2) opened scoring at the 12:44 mark of the opening period. Schroeder held the puck along the far boards and sent a shot on net that redirected off a defenseman’s stick and over the shoulder of San Antonio goaltender Dov Grumet-Morris.
The Wolves doubled their lead when right wing Mark Mancari faked a shot from the top of the near circle and instead slipped a pass to the far post where Haydar was waiting to tap home the puck past Grumet-Morris at 19:05.
Grumet-Morris (0-1) posted 21 saves on 23 shots.
San Antonio (2-1) got on the scoreboard while on the power play at 16:41 of the second period. Left wing Evan Barlow controlled the puck in the far circle and saucered a pass back door to defenseman Alex Petrovic, who hammered home the puck into the back of the net.
Haydar added an empty-net tally at 19:22 of the third period to make the score 3-1, but center Bracken Kearns scored the Rampage’s second goal of the night with two seconds remaining to close out scoring.
The Wolves look to even the series when they host the Rampage at 7 p.m. Wednesday at the Allstate Arena.
San Antonio 0 1 1 -- 2
Chicago 2 0 1 -- 3
First Period---1, Chicago, Schroeder 1 (Sweatt, Davies), 12:24; 2, Chicago, Haydar 2 (Mancari, Doell), 19:05. Penalties---Yonkman, San Antonio (holding), 6:51; Petrovic, San Antonio (interference), 13:36.
Second Period---3, San Antonio, Petrovic 1 (Barlow, Matsumoto), 16:41 pp. Penalties---Matsumoto, San Antonio (tripping), 0:09; Clackson, Chicago (elbowing), 3:05; Baumgartner, Chicago (high-sticking), 11:24; Matheson, Chicago (hooking), 15:27.
Third Period---4, Chicago, Haydar 3 (Bitz), 19:22 en; 5, San Antonio, Kearns 2 (Cullen), 19:58). Penalties---Derlyuk, San Antonio (hooking), 2:09; Bitz, Chicago (holding), 5:02; Doell, Chicago (interference), 7:40.
Shots on goal---San Antonio: 4-5-11—20; Chicago: 11-8-5--24. Power plays---San Antonio: 1-5; Chicago: 0-4. Goalies---San Antonio, Grumet-Morris (21-23); Chicago, Lack (18-20). A---2,399. Referees---Shaun Davies and Jean Hebert. Linesmen---Mathieu Chenier and Al Stensland.