Checkmate.
The Big Bang Theory Season 12, Episode 17
Oh, is it? We're conversing.
Checkmate.
The Big Bang Theory Season 3, Episode 11
Checkmate on Sheldon.
The Big Bang Theory Season 4, Episode 22
Checkmate would be irreversible."
Money Heist Season 1, Episode 8
Checkmate.[groans]
The Big Bang Theory Season 12, Episode 7