The best thing about tripled pawns is that there's three of them. Newly-minted Senior Master Eric Rosen got very nice play against e5 out of the opening (a Frenchified anti-Sicilian), but FM Keaton Kierwa made the most of his tripleton and was at least equal in this very interesting middlegame.
But White slips, after which Eric exploits the dominated Nb1 and the f2 weakness. (Why didn't Black play the immediate 35...Rxb1 winning a piece, you may ask? There's a good reason.)