This is a good question. General Zaroff did not hunt fairly at all in the short story, "The Most Dangerous Game."
First of all, Rainsford was not a willing participant. He was forced to be hunted. This is an enormous point. In addition, General Zaroff had the home field advantage. In hunting as well as war, knowing the terrain is a huge advantage. Rainsford, on the other hand, had to learn everything on the run.
Second, the hunt was not one on one. General Zaroff had Ivan, who is described as a huge man. Not only this, the general had dogs. In short, all the things he needed for a successful hunt he had. What makes this contrast even starker is that the general barely gave Rainsford anything. According to our text, Rainsford only got a few thins:
Then a businesslike air animated him. "Ivan," he said to Rainsford, "will supply you with hunting clothes, food, a knife. I suggest you wear moccasins; they leave a poorer trail.