Who was the old guy at the end?

He was a sock puppet.

What old guy at the end? I finished the show a week or so ago, refresh my memory.

He was just a random old guy she was going to play chess with, no tournament, no stress, just a nice care free game of chess without the world watching.

I just think it was a bunch of old chess guys and he might be the leader?

I think she had done everything she set out to do in the world of competition chess and just wanted to return to playing the game for fun, the way she and Mr. Shaibel enjoyed it. The old men in the park represent a love of the game.

She didn't know him. He was just a lucky random chess enthusiast who she decided to play a game with. Just for the fun of it.

That was a random fellow in Moscow who played street chess, but I seem to recall they showed her seeing him as Mr. Shaibel, and Bill Camp assumed the role for a moment. I may be wrong.

I think the greater significance was that she'd been grinding through chess for so long to beat the Russians that it had ceased to be fun, and now that her battle with the Russians was over, she was again playing for the love of the game.

He was just a random guy playing chess in a park.