March 29 (The Sports Xchange) - Highlights of National Hockey League games on Wednesday: Blackhawks 5, Penguins 1 The Chicago Blackhawks dominated the Pittsburgh Penguins on Wednesday, taking a four-goal lead in the first period en route to a 5-1 win at PPG Paints Arena. Artemi Panarin, Richard Panik, Marcus Kruger and Marian Hossa scored in the first period for a 4-0 lead, and Tanner Kero scored on a breakaway, the Blackhawks' eighth odd-man break, in the third. Bryan Rust scored for Pittsburgh in the third. Chicago goaltender Corey Crawford stopped 31 shots and won for the fourth time in his past five starts. Marc-Andre Fleury, who made 31 saves for the Penguins, had been 3-0-2 in his previous five decisions. Kings 4, Flames 1 Jarome Iginla's "Gordie Howe hat trick" -- a goal, assist and a fight -- led Los Angeles over Calgary. Anze Kopitar also had a goal and an assist for the Kings, who kept their slim playoff hopes alive heading into their final six games of the season. Ben Bishop made 25 saves for Los Angeles, while Trevor Lewis and Jeff Carter also scored. Dougie Hamilton scored for the Flames, who could have clinched a playoff berth with a win. Calgary's next chance to qualify for postseason play will come Friday when they host the San Jose Sharks. Capitals 5, Avalanche 3 Evgeny Kuznetsov and Marcus Johansson had a goal and an assist each, and Washington won its sixth straight. John Carlson, Jay Beagle and Lars Eller also scored, and Philipp Grubauer made 32 saves for Washington, which moved closer to clinching the Metropolitan Division and the Presidents' Trophy. Nathan MacKinnon had a goal and an assist, and Mikko Rantanen and Matt Nieto scored for Colorado, which has lost seven straight. Blues 3, Coyotes 1 Patrik Berglund, Vladimir Tarasenko and David Perron scored, and St. Louis moved within a point of a playoff berth by beating Arizona for the third time in 12 days. Carter Hutton made 22 saves for the Blues, who beat Arizona for the 11th straight time. In those 11 games, St. Louis has outscored Arizona 45-14. Louis Domingue made 40 saves for Arizona but took his first loss in four March starts.