I just played this game on whatifsports.com.
Final: SF 33, KC 27 in overtime
Christian McCaffrey was the star, with 18 rushes for 148 yards and a touchdown, and adding 2 receptions for 22 yards.
San Fran had a 14-10 lead at the half, but KC scored two touchdowns in the 3rd and 4th quarters to take a 24-14 lead with 14 minutes left in the game. SF then scored on 3 straight possessions - 2 field goals and a 45-yard McCaffrey TD run - to take a 27-24 lead. But Harrison Butker kicked a 41-yard FG as time expired to send the game into overtime, tied at 27. The teams exchanged a series of punts before Jordan Mason took a handoff 57 yards for a game-winning TD.
Stats
Passing:
Purdy: 17-32, 160 yds, 0 td, 1 int
Mahomes: 22-32, 257 yds, 2 td, 1 int
Rushing:
McCaffrey: 18 att, 148 yds, 1 td
Mason: 1 att, 57 yds, 1 td
Mitchell: 8 att, 19 yds
Purdy: 3 att, 9 yds
Samuel: 1 att, 1 yd
Pacheco: 17 att, 53 yds, 1 td
Edwards-Helaire: 6 att, 36 yds
Mahomes: 6 att, 9 yds
McKinnon: 4 att, 7 yds
Toney: 1 att, 0 yds
Receiving:
Aiyuk: 5 rec, 55 yds
Kittle: 4 rec, 44 yds
McCaffrey: 2 rec, 22 yds
Samuel: 2 rec, 18 yds
Rice: 6 rec, 66 yds, 1 td
Edwards-Helaire: 2 rec, 45 yds
Kelce: 5 rec, 40 yds
Pacheco: 4 rec, 35 yds
TOTALS:
Total Yds: SF 386, KC 341
1st Downs: SF 20, KC 24