
Checkmate.
The Big Bang Theory Season 11, Episode 15

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

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

I believe that is
flag to crotch four, CHECKMATE.
The Big Bang Theory Season 10, Episode 10

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