Coming off their bye week, the Steelers flew to Arrowhead Stadium for a Week 12 Sunday night showdown with the Kansas City Chiefs.  Pittsburgh trailed early in the first quarter when Chiefs kicker Ryan Succop kicked a 41-yard field goal.  Pittsburgh would answer in the second quarter with a 21-yard field goal from kicker Shaun Suisham following a Chiefs goal-line stand. The Steelers struck again when quarterback Ben Roethlisberger threw a 2-yard touchdown pass to rookie tight end Weslye Saunders. Succop and Shuisham each made 49-yard field goals before the end of the half to make it 13-6. The third quarter was scoreless, but in the 4th quarter Kansas City pulled closer when Succop booted a 40-yarder. This pulled the Chiefs to within 13-9. However, Pittsburgh's defense held on to preserve the victory as cornerback Keenan Lewis sealed the deal with an interception late in the 4th quarter with 29 seconds remaining.
Question: How many points did the Steelers win by?
Answer: 4