
That CHESS club picture is now just
David Zimmerman and Elaine Cho.
The Big Bang Theory Season 9, Episode 24

Oh. Now, what about our 3-D CHESS set?
The Big Bang Theory Season 10, Episode 10

In 4-D CHESS...
No.
The Big Bang Theory Season 7, Episode 1

It's three-person CHESS.
The Big Bang Theory Season 4, Episode 22

Chess champion Bobby Fischer.
Brian Wilson of The Beach--
The Big Bang Theory Season 9, Episode 10