this is nuts it is being said that the 49ers did not know the new overtime rules when they went out for the coin toss as a few members of the 49ers confirmed they did not know the new overtime rules so here was the situation at hand this is known as the Josh Allen rule in the playoffs both teams get a chance to possess the football now how previous overtime work was the team that got the ball first on offense if they scored a touchdown they would win the game so you would want the football in that case but with the new overtime rules just like in college football the defense should go first to see what the offense does because of this change and the 49ers taking the ball the Chiefs knew what they had to do giving the Chiefs an extra down where they would get a fourth down to convert which the Chiefs ended up doing and winning the game because of it