This is an archived site and is no longer being updated. New 538 articles can be found at www.abcnews.com/538. The final match of the 2016 Haru Basho — one of six professional sumo tournaments held each year — was a day-15 championship-deciding showdown between the sport’s top yokozuna.1 Hakuho, the White Peng,2 the dominant force in sumo over the past decade, was 13-1 in the tournament and hadn’t