What are some character traits of Rainsford that contribute to his victory against Zaroff?

The most obvious theme of "The Most Dangerous Game" is that which arises from the relationship of the hunter and the hunted. At the very beginning of story, Rainsford and Zaroff are presented as equals. Both characters are well-accomplished big-game hunters. As the story unfolds, however, their roles change. Rainsford is thrust into the position of the hunted. However, he tries to undermine the game by setting traps for the hunter. Rainsford's form of hunting is passive whereas Zaroff's is active. Rainsford, however, is able to maintain his intellectual composure during the most frightening of circumstances and uses this to his advantage in an attempt to outsmart Zaroff.