My experience is that most people still haven't heard the term 'powerlifter'. It means nothing to them. Many of those who have heard the term confuse it with Olympic lifting.
Just tell them that you lift weights, but only to improve your chess. That will confuse them.
Powerlifts: 500/363/573 @ 220 belt only
front squat: 403
dips: bodyweight + 176 x 4
military press: 232