in three-dimensional CHESS
for many years.
The Big Bang Theory Season 12, Episode 7
...why the two of us
can't play three-person CHESS.
The Big Bang Theory Season 4, Episode 22
I mean, not "beating you
at CHESS" easy,
The Big Bang Theory Season 12, Episode 7
When we played CHESS earlier, you were
terrific, and I can't wait to play you again.
The Big Bang Theory Season 1, Episode 10
If it's like your 3-D CHESS game,
The Big Bang Theory Season 10, Episode 10