Keith Tkachuk had a goal and an assist, and Manny Legace stopped 28 shots to help the St. Louis Blues post their fourth straight win, 3-1 over the Chicago Blackhawks on Wednesday night. Paul Kariya and Bryce Salvador also scored for the Blues (4-1-0), who got two assists from Brad Boyes. St. Louis, which entered 2-for-21 on the power play, converted two of three attempts against the Blackhawks.