Checkmate would be irreversible."
Money Heist Season 1, Episode 8
Checkmate.[groans]
The Big Bang Theory Season 12, Episode 7
...isn't that CHECKMATE
and I win?
The Big Bang Theory Season 5, Episode 18
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