The Big Bang Theory2007

Penny:
So, if I move my horsey here... Isn't that checkmate and I win?

Leonard Hofstadter:
[long pause] Hm.

Penny:
Well, is it or isn't it?

Leonard Hofstadter:
You know, I think this is a good stopping point. Uh... it's your first real game, I threw a lot of information at you...

Penny:
Uh, no, your king is trapped. He can't go here because of my lighthouse, and he can't go here because because of my pointy-head guy.

Leonard Hofstadter:
Like I said, complicated game.

Penny:
So did I win or not?

Leonard Hofstadter:
Did you have fun? Because if you had fun, then you are, you are a winner. And that's... that's what chess is all about.

Sheldon Cooper:
[coming in] Hello.

Leonard Hofstadter:
Hey.

Penny:
Oh, hey. Sorry, Sheldon, I'll move.

Sheldon Cooper:
Nah, why? My spot, your spot... What difference does it make?

Penny:
Okay, what just happened?

Leonard Hofstadter:
I don't know. Between you playing chess like Bobby Fischer and Sheldon being okay with you in his spot, I'm guessing someone went back in time, stepped on a bug and changed the course of human events.