How the Chiefs and Bills ended one of the craziest games in NFL history - The Washington Post
Chiefs' epic victory over Bills leaves NFL fans longing for more, but it doesn't get any better than this
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2021 AFC Divisional playoff game (Buffalo–Kansas City) - Wikipedia
How Kansas City and the Rams Advanced in the NFL Playoffs - The New York Times
AFC championship game: Cincinnati Bengals 27-24 Kansas City Chiefs – as it happened, NFL
Reigning champion Chiefs dump Bills 38-24 in AFC title game
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Patrick Mahomes, Chiefs outlast Josh Allen-led Bills in overtime thriller - BusinessWorld Online
Chiefs top Bengals 23-20 on last-second kick for AFC title
Bills suffer one of most gut-wrenching losses in history in OT to Chiefs
Buffalo Bills 36-42 Kansas City Chiefs: Patrick Mahomes throws walk-off TD in overtime to clinch win after epic battle with Josh Allen, NFL News
AFC Championship: Patriots Beat Chiefs in Overtime To Advance To Super Bowl
Chiefs win toss, but OT rules don't benefit KC this time
Bills Notebook: NFL's overtime rules fall under the spotlight after classic playoff game