When it comes to winning a big game, the Kings' knowledge in how to do so was a mismatch over the Ducks.

That strength more than any other defined the Kings' 6-2 victory in Game 7 of the Western Conference semifinal at Honda Center.

From an early goal by Kings forward Justin Williams — his sixth in a Game 7 — to continued veteran production, the Kings won their sixth elimination game of these playoffs and sent the Ducks home in their second in two years.

"The inner arrogance and quiet confidence that's in this dressing room … I look around and know it's going to get done," said Williams, who's now 6-0 in Game 7. "No one has to be great, but everybody has to be good.

"And we were all good tonight."

The Kings advance to their third consecutive Western Conference finals, where they'll have a rematch of last year's loss to the defending Stanley Cup-champion Chicago Blackhawks with Game 1 Sunday at United Center.

The top-seeded Ducks, meanwhile, were vanquished while falling behind 5-0 and losing for the third time in four home games, in the same building where they started the season 20-0-2.

"You feel like this could've been the year," Ducks forward Andrew Cogliano said. "That's the real down part of this. This is way worse than last year, when we were nervous, and didn't know how to play in a Game 7."

The Ducks also blew a 3-2 series lead last year in bowing to the Detroit Red Wings in the first round. Coach Bruce Boudreau said this version will take "a few months to figure out."

The lopsided defeat was their only four-goal home loss of the season, and the players struggled to answer why they collapsed in their moment of truth.