With the Raiders tied with both the Chargers and Chiefs atop the AFC West, the Raiders traveled to Kansas City with only four games left in the season. Looking to give themselves the tiebreaker with the Chiefs and stay above .500 on the season, the Raiders failed miserably. The defense allowed a field goal on the Chiefs' first possession to fall behind 3-0. The Chiefs extended the lead on the first play of the second quarter as Kareem Hunt scored from one yard out. Trailing 10-0, the Raider offense was only able to get one first down on their first three possessions. The Chiefs, scoring on their third straight possession, got another field goal to move their lead to 13-0. The Raiders began to move the ball on their ensuing possession, moving into Chiefs territory. However, Derek Carr was intercepted at the Chief 24 to end the drive. The Chiefs added another field goal on the ensuing possession, moving the lead to 16-0 with 1:45 remaining in the half. The Raiders quickly went three and out, giving the Chiefs, who had scored on their first four possessions, the ball with 1:14 remaining. The defense was able to keep the Chiefs from scoring as the half ended. The Chiefs began the second half with another field goal to take a 19-0 lead. A Raider three and out preceded the first punt of the game by the Chiefs. Looking to take advantage of the defense's first real stop of the game, Carr hit Johnny Holton on a 19-yard pass on the first play of the drive, but Holton fumbled and the Chiefs recovered. The Chiefs immediately turned the ball back over as Alex Smith was intercepted on the first play of the ensuing drive. However, the Raiders failed to convert on the turnover and punted to the Chiefs again. Four plays later Charcandrick West scored on a 13-yard run to extend the Chief lead to 26-0 and all but ending the game. After the teams exchanged punts, the Raiders finally scored with just under nine minutes left in the fourth quarter as Marshawn Lynch rushed 22 yards for a touchdown. Following a successful two-point conversion, the Raiders recovered an onside kick and Carr hit Jared Cook on a 29-yard pass to narrow the lead to 26-15. Electing not to attempt another onside kick, the Chiefs took over and were able to run nearly five minutes off the clock before punting to the Raiders with 2:39 remaining. The Raiders were able to move the ball, but Carr was intercepted in the end zone with 46 seconds left and the Chiefs were able to run out the clock. The 26-15 loss moved the Raiders to 6-7 on the season. The Raiders again struggled as the defense gave up 408 yards while the offense managed only 268, most of which occurred after the game had been decided. The Chiefs out-rushed the Raiders 165-70 in the game as the Raiders fell to a game out of first in the AFC West. A Chargers victory on the day also meant the Raiders fell a game behind them as well.
Question: How many points were the Chiefs leading by at halftime?
Answer: 16