Kammala jumla mai zuwa: A wasan kasa da kasa, Guillermo Vassaux ya wakilci Guatemala a wasa da El Salvador a 1930, wasan farko na wasan chess da kasashen Amurka ta tsakiya suka yi. Ya halarci gasar Chess Olympiad sau ɗaya, yana wakiltar Guatemala a kan kwamiti na farko a gasar.
8th Chess Olympiad a 1939 a Buenos Aires, ta ci nasara biyar, biyu sun yi wasa, kuma takwas sun rasa.