SEATTLE (Ticker) -- Washington State and its vaunted defense slowed down Washington, but the Huskies played a little defense of their own.
Nate Robinson led a balanced attack with 13 points as No. 10 Washington coasted to its 18th straight home victory in a 66-48 triumph over intrastate and Pac-10 rival Washington State.
The Cougars, who entered the game second in the country allowing 53.9 points per game, held the Huskies to 66 points, but Washington limited Washington State to 48 points on 32 percent (19-of-59) shooting in its best defensive effort of the season.
"To be able to go out and win that game the way we did against that team, minus a couple of poor decisions on our end, I thought that was an extremely good effort today," Huskies coach Lorenzo Romar said. "I thought we did a very good job of guarding and for a large part of the game rebounding. Our guys handled the situation very well."
Washington, which moved into a conference tie with Arizona at 6-1, entered the game second in the nation in scoring at 89.4 points per game.
"They prevented us from doing anything that we needed to do to stay competitive," Cougars coach Dick Bennett said. "Their quickness was overwhelming; we have been in that situation before, once before, and this was the same. Our limitations were more evident, and they just continued to push the envelope, that's why they are such a good team."
The Cougars, who try to control the tempo by playing a deliberate offensive style, took a 5-4 lead on Kyle Weaver's free throw five minutes in. But Jamaal Williams scored five points and Joel Smith added four during a 14-0 run that gave the Huskies an 18-5 lead with 9:43 to play.
"The fact that we were able to win by 18 points despite it not being an up-tempo game makes you feel pretty good," Romar said. "If we would do this every time we play them we wouldn't have to be up-tempo."
Washington (16-2, 6-1 Pac-10) held Washington State (8-8, 3-4) to 28 percent (7-of-28) shooting and led, 31-18, at the break.
"Our will was broken, but that is the way basketball is," Bennett said. "Will's are broken all the time, you just have to rebuild. You try to do that at halftime.
"I didn't like what I was seeing from guys that I thought could deliver a little better. I don't think we got the play from guys I thought might be capable of playing in a game like this."
The Huskies put away the game in the first two minutes of the second half. Mike Jensen and Robinson knocked down 3-pointers and Will Conroy scored on a layup for a 39-21 lead. A dunk by Williams increased the lead to 60-38 with just over four minutes to play.
Williams had 12 points and Smith added 10 for Washington, which shot just 36 percent (23-of-64). Brandon Roy, who had missed the past two games with a right knee problem that required surgery on November 30, returned and scored five points in 20 minutes.
Thomas Kelati scored 15 points for Washington State, which lost to Washington on the road for the 11th straight time.