Write a question about the following article: After the loss to the Bengals, the Pittsburgh Steelers journeyed to Arrowhead Stadium for a match with the Chiefs. At the start of the first quarter Chiefs RB Jamaal Charles returned a kickoff from their own 3-yard line to the Steelers' endzone for a touchdown. In the second quarter Pittsburgh rallied as PK Jeff Reed made a 36-yard field goal, then QB Ben Roethlisberger made an 8-yard touchdown pass to WR Hines Ward, and then Roethlisberger passed to TE Heath Miller 10&#160;yards for a touchdown. In the third quarter the Chiefs tied the game when QB Matt Cassel made a 21-yard touchdown pass to TE Leonard Pope, and then kicker Ryan Succop made a 22-yard field goal. In the fourth quarter Pittsburgh took the lead as QB Ben Roethlisberger made an 8-yard touchdown pass to RB Rashard Mendenhall, until the Chiefs came back to tie the game as QB Matt Cassel made a two-yard touchdown pass to Jamaal Charles to put the game in overtime. Afterwards, it was Kansas City that took the win when kicker Ryan Succop made a 22-yard field goal.

Question about the article:
How many points did the Chiefs have to win?