How'd he win, what happened to Zaroff?

Rainsford eluded the General and jumped off a cliff. When Zaroff arrives at the edge of the cliff, he stops to regard the waters below. Disappointed, he shrugs his shoulders, takes a puff of a cigarette, and drinks a sip of brandy. He then heads home. That night he eats a good dinner, all the while lamenting the death of his faithful servant Ivan. After drinking a nightcap, he heads towards his bedroom. Immediately after switching on the light a man appears from behind the bed’s curtains. It is Rainsford. Zaroff congratulates Rainsford on his win. Rainsford tells Zaroff that the game is not over yet. Zaroff agrees—whoever wins the last battle would sleep in his bed, the loser be fed to the dogs. The story ends with Rainsford remarking on the quality of the bed he slept in that night.