Upon Further Review: Chiefs Week 15

OAKLAND, Calif. -- A few thoughts on the Kansas City Chiefs' 56-31 win over the Oakland Raiders:

Death by screen: The Chiefs made the Raiders look as if they'd never covered the screen pass on their first play from scrimmage. Jamaal Charles took that one 49 yards for a touchdown. He later scored twice more on screen passes, from 39 and 16 yards. Charles, who also scored a 71-yard touchdown on a downfield pass, was used consistently on screens because of what the Raiders did against the Chiefs in their previous meeting in October. Their pass rush sacked quarterback Alex Smith twice and hit him on numerous other occasions. "They do a great job rushing the passer and their blitz package is phenomenal," coach Andy Reid said. "We felt that since we didn’t score one time in the first five drives against them the last time, we thought maybe the screen game would help us get going. It was something with their great pass rush that we felt we needed to slow it down a little bit."

A perfect Smith: Smith's stat line brought him a perfect passer rating of 158.3. Smith was 17-of-20 for 287 yards and a career-high five touchdowns. He lost a fumble for the first time this season, but that doesn't count against his passer rating. “Teammates make me look good," he said. "I didn’t do much. Three screens for touchdowns. I’ve never been a part of anything like that or seen that."

Turnover party: The Chiefs expanded their league lead in turnover differential with a plus-six Sunday. The Chiefs intercepted five passes and recovered a pair of Oakland fumbles. The Chiefs started seven possessions on Oakland's side of the field, six times after creating a turnover. The Chiefs scored four touchdowns following an Oakland turnover. Meanwhile, the Raiders didn't start any of their 14 possessions on Kansas City's side of the field. The Chiefs are now plus-21 this season in turnover differential.

More big plays: The Raiders gained 461 yards, marking the fifth time in the past six games the Chiefs have allowed more than 425. Oakland had seven plays of 20 yards or more. This one was more troubling than games against veteran quarterbacks Peyton Manning and Philip Rivers. "Defensively, we've got to do a little bit better," linebacker Derrick Johnson said. "We know that. But it's good when you know you can correct some things and we get a win at the same time."