the differences between the story and the movie of The Most Dangerous Game

The old movie is really fun. The movie has more characters. There is a girl and her drunk brother who are "guests" at Zaroff's mansion. Zaroff also has more henchmen than just Ivan. The opening scene has Rainsford's yacht sinking instead of Rainsford falling off. Rainsford is the only survivor. Zaroff ends up hunting all three of his guests. The movie ends with Rainsford an the girl escaping on a yacht while the wounded Zaroff, trying to hit them with an arrow, falls from his room window into his hungry dogs.

Need similarities between the book and the movie "The Most Dangerous Game"

There is more people in the movie and the beginning and end or not the same as the book