
Checkmate on Sheldon.
The Big Bang Theory Season 4, Episode 22

Oh, is it? We're conversing.
Checkmate.
The Big Bang Theory Season 3, Episode 11

to avoid CHECKMATE, and then he did it."
Money Heist Season 1, Episode 7

Checkmate would be irreversible."
Money Heist Season 1, Episode 8

And then CHECKMATE.
Money Heist Season 3, Episode 2