The ambiguous spelling comment was because I can't find any consistency about if chessboxing or chess boxing is one word or two, but there is funky spelling elsewhere too (which I wasn't going to be a prick about if it came up haha)
Mystery Inc (Velma and Daphne) plus Benoit Blanc for "mystery"
Sneaky chessboard in the foreground, and then a gif from the Queens Gambit for Chess
Heavy punching bag in the background, and then top less boxers for boxing