How is Sanger Rainsford cunning?

Sanger Rainsford is a world-renowned hunter who demonstrates his cunning by creating several traps and maneuvering through the forest in order to escape General Zaroff.
Initially, Rainsford depicts his cunning by executing a series of intricate loops to throw the general off his path. By creating a misleading trail through the woods, Rainsford makes it difficult for the general to track his movements. Rainsford then retires in the limbs of a tree to rest above the ground in hopes of avoiding detection.
The next day, Rainsford spots a massive dead tree leaning precariously across a smaller one. Rainsford once again demonstrates his cunning by making a Malay mancatcher, which almost kills the general. Fortunately for Zaroff, he narrowly escapes being crushed by the massive dead tree.
While General Zaroff heads home to dress his wound, Rainsford once again reveals his cunning by digging a Burmese tiger pit, which ends up killing one of Zaroff's best dogs. Later on, Rainsford fastens his knife to a young sapling and uses grapevine to tie back the sapling before he runs away. When Zaroff and Ivan approach with their pack of dogs, the sapling springs forward and kills Ivan. After Rainsford dives into the ocean, he swims to shore and demonstrates his cunning by hiding in the general's room. Rainsford then kills General Zaroff in a one-on-one fight and sleeps peacefully in his bed.