Physical contests (sports, racing, wrestling), knowledge contests ("Do you know x?"), practice based games (as you mentioned, some board, chess, etc). Essentia

Physical contests (sports, racing, wrestling), knowledge contests ("Do you know x?"), practice based games (as you mentioned, some board, chess, etc). Essentially anything where "I've consumed more calories that you have" or "I've had more years to think that you have" are an unfair advantage for purposes of fun.