Corey Crawford stopped 23 shots for his second shutout this season to backstop the Blackhawks to a physical 4-0 victory over the St. Louis Blues on Wednesday night that gave coach Joel Quenneville his 700th NHL win.Duncan Keith, Andrew Shaw, Marcus Kruger and Ben Smith scored as the Hawks ended the league-leading Blues’ nine-game point streak (8-0-1) and dealt St. Louis its first regulation loss against a Central Division opponent this season. The Blues entered 20-0-2 against division foes and hadn’t lost in regulation since a 1-0 defeat at Anaheim on Feb. 28.Quenneville, who previously guided St. Louis and Colorado, has the most wins of any active NHL coach and ranks third all-time behind Al Arbour and Scotty Bowman, now the Blackhawks’ senior adviser of hockey operations. The win was costly as Patrick Kane suffered what is thought to be an MCL sprain that could keep him out of the Hawks lineup for at least three weeks. The inury happened when Kane took a big hit from the Blues’ David Backes that took Kane out in the second period.