たいこうば
rival candidate; rival; opponent; rival horse
Noun
彼かれの馬うまは着々ちゃくちゃくと対抗馬たいこうばに追おいついた。
His horse gained steadily on his rivals.
本命ほんめいと対抗馬たいこうばが競せり合あったお陰かげで、ダークホースの彼かれが漁夫ぎょふの利りを得えたってわけだ。
Since the favorite and his rival were running against each other a dark horse like him was able to pull out in front.