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

...isn't that CHECKMATE
and I win?
The Big Bang Theory Season 5, Episode 18

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

- Checkmate.
- Aaarggh!
The Big Bang Theory Season 1, Episode 11

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