After a scoreless first quarter, the Chiefs took a 9-0 lead midway through the second quarter. After Broncos quarterback Trevor Siemian was strip-sacked near the goal line, offensive tackle Russell Okung was tackled in the end zone trying to recover the fumble and the Chiefs were awarded a safety; running back Tyreek Hill then returned the ensuing free kick 86 yards for a touchdown. A 33-yard field goal by placekicker Brandon McManus just after the two-minute warning put the Broncos on the scoreboard. The Broncos grabbed the lead midway through the third quarter, with a 6-yard touchdown pass from Siemian to wide receiver Jordan Taylor. The Chiefs responded on their next possession, with Hill rushing for a 3-yard touchdown. The drive was extended after the Chiefs accepted an illegal formation penalty on the Broncos that nullified a 35-yard field goal by placekicker Cairo Santos. The Broncos re-claimed the lead midway through the fourth quarter, with a 35-yard touchdown pass from Siemian to wide receiver Emmanuel Sanders. After forcing a Chiefs' punt, the Broncos were attempting to run out the clock after earning a first down with 3:31 remaining in the game. Two plays later, and after the Chiefs had used all of their team timeouts, the Broncos extended their lead to 24-16, with a 76-yard touchdown pass from Siemian to wide receiver Bennie Fowler. However, the Broncos' defense was unable to keep the Chiefs out of the end zone. Quarterback Alex Smith methodically engineered a game-tying 13-play, 75-yard drive, with a 3-yard touchdown pass to Hill, coupled with a two-point conversion pass to tight end Demetrius Harris. The play was initially ruled down at the 1-yard line with 15 seconds remaining, but overturned by instant replay, sending the game to overtime. The Broncos won the overtime coin toss, and the teams exchanged field goals on their initial possessions: a 44-yarder by Brandon McManus followed by a 37-yarder by Santos. The Broncos' next overtime possession commenced with 4:19 remaining, and drove to as far as the Chiefs' 44-yard line. Instead of a short punt, Broncos' head coach Gary Kubiak elected to send McManus onto the field for a potential game-winning 62-yard field goal, however, McManus attempt was both short and wide left, giving the Chiefs possession at the Broncos' 48-yard line with 1:08 remaining. Four plays later, and with five seconds remaining, Santos kicked the game-winning 34-yard field goal for the Chiefs, which initially caromed off the left upright.. How many yards was the longest touchdown pass of the game?