Bones, Season 9

Brennan:
Booth is right. It is like the queen sacrifice Marshall used against Levitsky in 1912.

Booth:
What???

Sweets:
He wouldn't see that coming. [looks at Brennan] How'd you know about that?

Brennan:
I play too, not like you, of course. I've been trying to teach Booth but he keeps referring to the knights as "horsies". [Booth covers his face with his palm in frustration]

Booth:
That's great, can we just move this along. Ok, chess is a one-on-one game, but in a real war, you need a platoon and that's what we are right now, ok? So let's move out!